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APPLICATION NOTES AVAILABLE
AN99 * AN115 * AN120 * AN124 * AN133 * AN134 * AN135
Low Noise/Low Power/SPI Bus
X9410
Dual Digitally Controlled Potentiometer (XDCPTM)
FEATURES * Two potentiometers in one package * SPI serial interface * Register oriented format --Direct read/write/transfer wiper positions --Store as many as four positions per potentiometer * Power supplies --VCC = 2.7V to 5.5V --V+ = 2.7V to 5.5V --V- = -2.7V to -5.5V * Low power CMOS --Standby current < 1A * High reliability --Endurance-100,000 data changes per bit per register --Register data retention-100 years * 8-bytes of nonvolatile EEPROM memory * 10K resistor arrays * Resolution: 64 taps each pot * 24-lead TSSOP, 24-lead SOIC and 24-pin plastic DIP packages DESCRIPTION The X9410 integrates two digitally controlled potentiometers (XDCP) on a monolithic CMOS integrated microcircuit. The digitally controlled potentiometer is implemented using 63 resistive elements in a series array. Between each element are tap points connected to the wiper terminal through switches. The position of the wiper on the array is controlled by the user through the SPI bus interface. Each potentiometer has associated with it a volatile Wiper Counter Register (WCR) and 4 nonvolatile Data Registers (DR0:DR3) that can be directly written to and read by the user. The contents of the WCR controls the position of the wiper on the resistor array through the switches. Power up recalls the contents of DR0 to the WCR. The XDCP can be used as a three-terminal potentiometer or as a two-terminal variable resistor in a wide variety of applications including control, parameter adjustments, and signal processing.
BLOCK DIAGRAM
Pot 0 VCC VSS V+ VR0 R1 Wiper Counter Register (WCR) VH0/RH0
HOLD CS SCK SO SI A0 A1 WP
R2 R3
VL0/RL0 VW0/RW0
Interface and Control Circuitry Data
8 Pot 1 R0 R1 Wiper Counter Register (WCR) VW1/RW1 VH1/RH1
Resistor Array Pot1
R2 R3
VL1/RL1
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PIN DESCRIPTIONS Host Interface Pins Serial Output (SO) SO is a push/pull serial data output pin. During a read cycle, data is shifted out on this pin. Data is clocked out by the falling edge of the serial clock. Serial Input SI is the serial data input pin. All opcodes, byte addresses and data to be written to the pots and pot registers are input on this pin. Data is latched by the rising edge of the serial clock. Serial Clock (SCK) The SCK input is used to clock data into and out of the X9410. Chip Select (CS) When CS is HIGH, the X9410 is deselected and the SO pin is at high impedance, and (unless an internal write cycle is underway) the device will be in the standby state. CS LOW enables the X9410, placing it in the active power mode. It should be noted that after a power-up, a HIGH to LOW transition on CS is required prior to the start of any operation. Hold (HOLD) HOLD is used in conjunction with the CS pin to select the device. Once the part is selected and a serial sequence is underway, HOLD may be used to pause the serial communication with the controller without resetting the serial sequence. To pause, HOLD must be brought LOW while SCK is LOW. To resume communication, HOLD is brought HIGH, again while SCK is LOW. If the pause feature is not used, HOLD should be held HIGH at all times. Device Address (A0-A1) The address inputs are used to set the least significant 2 bits of the 8-bit slave address. A match in the slave address serial data stream must be made with the address input in order to initiate communication with the X9410. A maximum of 4 devices may occupy the SPI serial bus. Potentiometer Pins VH/RH (VH0/RH0--VH1/RH1), VL/RL (VL0/RL0--VL1/RL1) The VH/RH and VL/RL inputs are equivalent to the terminal connections on either end of a mechanical potentiometer.
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VW/RW (VW0/RW0--VW1/RW1) The wiper outputs are equivalent to the wiper output of a mechanical potentiometer. Hardware Write Protect Input (WP) The WP pin when LOW prevents nonvolatile writes to the Data Registers. Analog Supplies (V+, V-) The analog supplies V+, V- are the supply voltages for the XDCP analog section. PIN CONFIGURATION
DIP/SOIC VCC VL0/RL0 VH0/RH0 VW0/RW0 CS WP SI A1 VL1/RL1 VH1/RH1 VW1/RW1 VSS 1 2 3 4 5 6 7 8 9 10 11 12 X9410 24 23 22 21 20 19 18 17 16 15 14 13 V+ NC NC NC A0 SO HOLD SCK NC NC NC V-
TSSOP SI A1 VL1/RL1 VH1/RH1 VW1/RW1 VSS NC NC NC VSCK HOLD 1 2 3 4 5 6 7 8 9 10 11 12 X9410 24 23 22 21 20 19 18 17 16 15 14 13 WP CS VW0/RW0 VH0/RH0 VL0/RL0 VCC NC NC NC V+ A0 SO
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X9410
PIN NAMES Symbol
SCK SI, SO A0-A1 VH0/RH0-VH1/RH1, VL0/RL0-VL1/RL1 VW0/RW0-VW1/RW1 WP V+,VVCC VSS NC
Description
Serial Clock Serial Data Device Address Potentiometer Pins (terminal equivalent) Potentiometer Pin (wiper equivalent) Hardware Write Protection Analog Supplies System Supply Voltage System Ground No Connection
These switches are controlled by a Wiper Counter Register (WCR). The six bits of the WCR are decoded to select, and enable, one of sixty-four switches. Wiper Counter Register (WCR) The X9410 contains two Wiper Counter Registers, one for each XDCP potentiometer. The WCR is equivalent to a serial-in, parallel-out register/counter with its outputs decoded to select one of sixty-four switches along its resistor array. The contents of the WCR can be altered in four ways: it may be written directly by the host via the Write Wiper Counter Register instruction (serial load); it may be written indirectly by transferring the contents of one of four associated Data Registers via the XFR Data Register or Global XFR Data Register instructions (parallel load); it can be modified one step at a time by the Increment/ Decrement instruction. Finally, it is loaded with the contents of its Data Register zero (DR0) upon power-up. The Wiper Counter Register is a volatile register; that is, its contents are lost when the X9410 is powereddown. Although the register is automatically loaded with the value in DR0 upon power-up, this may be different from the value present at power-down. Data Registers Each potentiometer has four 6-bit nonvolatile Data Registers. These can be read or written directly by the host. Data can also be transferred between any of the four Data Registers and the associated Wiper Counter Register. All operations changing data in one of the Data Registers is a nonvolatile operation and will take a maximum of 10ms. If the application does not require storage of multiple settings for the potentiometer, the Data Registers can be used as regular memory locations for system parameters or user preference data. Data Register Detail
(MSB) D5 NV D4 NV D3 NV D2 NV D1 NV (LSB) D0 NV
DEVICE DESCRIPTION The X9410 is a highly integrated microcircuit incorporating two resistor arrays and their associated registers and counters and the serial interface logic providing direct communication between the host and the XDCP potentiometers. Serial Interface The X9410 supports the SPI interface hardware conventions. The device is accessed via the SI input with data clocked in on the rising SCK. CS must be LOW and the HOLD and WP pins must be HIGH during the entire operation. The SO and SI pins can be connected together, since they have three state outputs. This can help to reduce system pin count. Array Description The X9410 is comprised of two resistor arrays. Each array contains 63 discrete resistive segments that are connected in series. The physical ends of each array are equivalent to the fixed terminals of a mechanical potentiometer (VH/RH and VL/RL inputs). At both ends of each array and between each resistor segment is a CMOS switch connected to the wiper (VW/RW) output. Within each individual array only one switch may be turned on at a time.
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Figure 1. Detailed Potentiometer Block Diagram
(One of Two Arrays)
Serial Data Path From Interface Circuitry Register 0 8 Register 1 6
Serial Bus Input C o u n t e r D e c o d e
VH/RH
Parallel Bus Input Wiper Counter Register (WCR)
Register 2
Register 3
If WCR = 00[H] then VW/RW = VL/RL If WCR = 3F[H] then VW/RW = VH/RH
INC/DEC Logic UP/DN Modified SCL UP/DN CLK VL/RL
VW/RW
Write in Process The contents of the Data Registers are saved to nonvolatile memory when the CS pin goes from LOW to HIGH after a complete write sequence is received by the device. The progress of this internal write operation can be monitored by a Write In Process bit (WIP). The WIP bit is read with a Read Status command. INSTRUCTIONS Identification (ID) Byte The first byte sent to the X9410 from the host, following a CS going HIGH to LOW, is called the Identification byte. The most significant four bits of the slave address are a device type identifier, for the X9410 this is fixed as 0101[B] (refer to Figure 2). The two least significant bits in the ID byte select one of four devices on the bus. The physical device address is defined by the state of the A0-A1 input pins. The X9410 compares the serial data stream with the address input state; a successful compare of both address bits is
required for the X9410 to successfully continue the command sequence. The A0-A1 inputs can be actively driven by CMOS input signals or tied to VCC or VSS. The remaining two bits in the ID byte must be set to 0. Figure 2. Identification Byte Format
Device Type Identifier
0
1
0
1
0
0
A1
A0
Device Address
Instruction Byte The next byte sent to the X9410 contains the instruction and register pointer information. The four most significant bits are the instruction. The next four bits point to one of the two pots and when applicable they point to one of four associated registers. The format is shown below in Figure 3.
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X9410
Figure 3. Instruction Byte Format
Register Select
I3
I2
I1
I0
R1
R0
0
P0
is a write to nonvolatile memory and takes a minimum of tWR to complete. The transfer can occur between one of the two potentiometers and one of its associated registers; or it may occur globally, where the transfer occurs between both potentiometers and one associated register. Five instructions require a three-byte sequence to complete. These instructions transfer data between the host and the X9410; either between the host and one of the data registers or directly between the host and the Wiper Counter Register. These instructions are: - Read Wiper Counter Register--read the current wiper position of the selected pot, - Write Wiper Counter Register--change current wiper position of the selected pot, - Read Data Register--read the contents of the selected data register; - Write Data Register--write a new value to the selected data register. - Read Status--This command returns the contents of the WIP bit which indicates if the internal write cycle is in progress.
Instructions
Pot Select
The four high order bits of the instruction byte specify the operation. The next two bits (R1 and R0) select one of the four registers that is to be acted upon when a register oriented instruction is issued. The last bit (P0) selects which one of the two potentiometers is to be affected by the instruction. Four of the ten instructions are two bytes in length and end with the transmission of the instruction byte. These instructions are: - XFR Data Register to Wiper Counter Register--This transfers the contents of one specified Data Register to the associated Wiper Counter Register. - XFR Wiper Counter Register to Data Register--This transfers the contents of the specified Wiper Counter Register to the specified associated Data Register. - Global XFR Data Register to Counter Register--This transfers the contents of both specified Data Registers to the associated Wiper Counter Registers. - Global XFR Wiper Counter Register to Data Register-- This transfers the contents of both Wiper Counter Registers to the specified associated Data Registers.
The sequence of these operations is shown in Figure 5 and Figure 6. The final command is Increment/Decrement. It is different from the other commands because it's length is indeterminate. Once the command is issued, the master can clock the selected wiper up and/or down in one resistor segment steps, thereby providing a fine tuning capability to the host. For each SCK clock pulse (tHIGH) while SI is HIGH, the selected wiper will move one resistor segment towards the VH/RH terminal. Similarly, for each SCK clock pulse while SI is LOW, the selected wiper will move one resistor segment towards the VL/RL terminal. A detailed illustration of the sequence and timing for this operation are shown in Figures 7-8.
The basic sequence of the two byte instructions is illustrated in Figure 4. These two-byte instructions exchange data between the WCR and one of the data registers. A transfer from a Data Register to a WCR is essentially a write to a static RAM, with the static RAM controlling the wiper position. The response of the wiper to this action will be delayed by tWRL. A transfer from the WCR (current wiper position), to a data register
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X9410
Figure 4. Two-Byte Instruction Sequence
CS SCK
SI 0 1 0 1 0 0 A1 A0 I3 I2 I1 I0 R1 R0 0 P0
Figure 5. Three-Byte Instruction Sequence (Write)
CS SCL SI 0 1 0 1 0 0 A1 A0 I3 I2 I1 I0 R1 R0 0 P0 0 0 D5 D4 D3 D2 D1 D0
Figure 6. Three-Byte Instruction Sequence (Read)
CS SCL SI 0 S0 0 0 D5 D4 D3 D2 D1 D0 1 0 1 0 0 A1 A0 I3 I2 I1 I0 R1 R0 0 P0
Don't Care
Figure 7. Increment/Decrement Instruction Sequence
CS SCK
SI 0 1 0 1 0 0 A1 A0 I3 I2 I1 I0 0 0 0 P0 I N C 1 I N C 2 I N C n D E C 1 D E C n
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X9410
Figure 8. Increment/Decrement Timing Limits
tWRID SCK
SI
VW/RW INC/DEC CMD Issued
Voltage Out
Table 1. Instruction Set Instruction
Read Wiper Counter Register Write Wiper Counter Register Read Data Register Write Data Register XFR Data Register to Wiper Counter Register XFR Wiper Counter Register to Data Register Global XFR Data Register to Wiper Counter Register Global XFR Wiper Counter Register to Data Register Increment/Decrement Wiper Counter Register Read Status (WIP bit)
I3
1 1 1 1 1
I2
0 0 0 1 1
Instruction Set I1 I0 R1 R0
0 1 1 0 0 1 0 1 0 1 0 0 R1 R1 R1 R1 R1 R1 0 0 0 0 R0 R0 R0 R0 R0 R0 0 0
P1
0 0 0 0 0
P0
P0 P0 P0 P0 P0 P0 0
Operation
Read the contents of the Wiper Counter Register pointed to by P0 Write new value to the Wiper Counter Register pointed to by P0 Read the contents of the Data Register pointed to by P0 and R1-R0 Write new value to the Data Register pointed to by P0 and R1-R0 Transfer the contents of the Data Register pointed to by R1-R0 to the Wiper Counter Register pointed to by P0 Transfer the contents of the Wiper Counter Register pointed to by P0 to the Register pointed to by R1-R0 Transfer the contents of the Data Registers pointed to by R1-R0 of both pots to their respective Wiper Counter Register Transfer the contents of all Wiper Counter Registers to their respective data Registers pointed to by R1-R0 of both pots Enable Increment/decrement of the Wiper Counter Register pointed to by P0 Read the status of the internal write cycle, by checking the WIP bit.
1
1
1
0
0
0
0
0
1
0
1
0
0
0
0
0
0 0
0 1
1 0
0 1
0 0
P0 1
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Instruction Format
Notes: (1) (2) (2) (3) "A1 ~ A0": stands for the device addresses sent by the master. WPx refers to wiper position data in the Counter Register "I": stands for the increment operation, SI held HIGH during active SCK phase (high). "D": stands for the decrement operation, SI held LOW during active SCK phase (high).
Read Wiper Counter Register (WCR)
device type identifier device addresses instruction opcode WCR addresses wiper position (sent by X9410 on SO)
CS CS Falling W W W W W W Rising Edge 0 1 0 1 0 0 A A 1 0 0 1 0 0 0 P 0 0 P P P P P P Edge 10 0 543210
Write Wiper Counter Register (WCR)
device type identifier device addresses instruction opcode WCR addresses Data Byte (sent by Host on SI)
CS CS Falling W W W W W W Rising Edge 0 1 0 1 0 0 A A 1 0 1 0 0 0 0 P 0 0 P P P P P P Edge 10 0 543210
Read Data Register (DR)
device type identifier device addresses instruction opcode DR and WCR addresses 0 Data Byte (sent by X9410 on SO)
CS Falling Edge 0 1 0 1 0 0 A A 1 0 1 1 R R 10 10
CS W W W W W W Rising P 0 0 P P P P P P Edge 0 543210
Write Data Register(DR)
device type device identifier addresses instruction opcode DR and WCR addresses R 0 0 P 0 Data Byte (sent by host on SI)
CS Falling Edge 0 1 0 1 0 0 A A 1 1 0 0 R 10 1
CS W W W W W W Rising 0 0 P P P P P P Edge 543210
HIGH-VOLTAGE WRITE CYCLE
Transfer Data Register (DR) to Wiper Counter Register (WCR)
device type device instruction DR and WCR CS CS identifier addresses opcode addresses Falling Rising Edge 0 1 0 1 0 0 A A 1 1 0 1 R R 0 P Edge 10 10 0
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X9410
Transfer Wiper Counter Register (WCR) to Data Register (DR)
CS Falling DD Edge 0 1 0 1 0 0 A A 1 1 1 0 R 1 10 device type identifier device addresses instruction opcode DR and WCR addresses R 0 0 CS Rising P Edge 0
HIGH-VOLTAGE WRITE CYCLE
Increment/Decrement Wiper Counter Register (WCR)
device type device instruction WCR increment/decrement CS CS identifier addresses opcode addresses (sent by master on SDA) Falling Rising Edge 0 1 0 1 0 0 A A 0 0 1 0 X X 0 P I/ I/ . . . . I/ I/ Edge 10 0DD DD
Global Transfer Data Register (DR) to Wiper Counter Register (WCR)
device type device instruction DR CS CS identifier addresses opcode addresses Falling Rising Edge 0 1 0 1 0 0 A A 0 0 0 1 R R 0 0 Edge 10 10
Global Transfer Wiper Counter Register (WCR) to Data Register (DR)
device type device instruction DR CS CS identifier addresses opcode addresses Falling Rising Edge 0 1 0 1 0 0 A A 1 0 0 0 R R 0 0 Edge 10 10 HIGH-VOLTAGE WRITE CYCLE
Read Status
device type identifier device addresses instruction opcode wiper addresses Data Byte (sent by X9410 on SO)
CS CS Falling W Rising Edge 0 1 0 1 0 0 A A 0 1 0 1 0 0 0 1 0 0 0 0 0 0 0 I Edge 10 P
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ABSOLUTE MAXIMUM RATINGS Temperature under bias ....................-65C to +135C Storage temperature .........................-65C to +150C Voltage on SCK, SCL or any address input with respect to VSS ......................... -1V to +7V Voltage on V+ (referenced to VSS) ........................ 10V Voltage on V- (referenced to VSS)......................... -10V (V+) - (V-).............................................................. 10V Any VH/RH ............................................................... V+ Any VL/RL ................................................................. VLead temperature (soldering, 10 seconds).........300C IW (10 seconds) ............................................... 12mA RECOMMENDED OPERATING CONDITIONS Temperature
Commercial Industrial
COMMENT Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only; the functional operation of the device (at these or any other conditions above those listed in the operational sections of this specification) is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Min.
0C -40C
Max.
+70C +85C
Device
X9410 X9410-2.7
Supply Voltage (VCC) Limits
5V 10% 2.7V to 5.5V
ANALOG CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.) Limits Symbol
RTOTAL IW RW Vv+ VvVTERM
Parameter
End to end resistance Power rating Wiper current Wiper resistance Voltage on V+ pin Voltage on V- pin X9410 X9410-2.7 X9410 X9410-2.7 Voltage on any VH/RH or VL/RL pin Noise Resolution
(4)
Min.
Typ.
Max.
20 50 6
Unit
% mW mA V V V dBV %
Test Conditions
25C, each pot Wiper Current = 1mA, VCC = 3V Wiper Current = 1mA, VCC = 5V
150 40 +4.5 +2.7 -5.5 -5.5 V-140 1.6
250 100 +5.5 +5.5 -4.5 -2.7 V+
Ref: 1kHz Vw(n)(actual)--Vw(n)(expected) Vw(n + 1)--[Vw(n) + MI]
Absolute linearity (1) Relative linearity (2) Temperature coefficient of RTOTAL Ratiometric Temperature Coefficient CH/CL/CW Potentiometer Capacitances 10/10/25 300
1 0.2 20
MI(3) MI(3) ppm/C ppm/C pF
See Circuit #3
Notes: (1) Absolute Linearity is utilized to determine actual wiper voltage versus expected voltage as determined by wiper position when used as a potentiometer. (2) Relative Linearity is utilized to determine the actual change in voltage between two successive tap positions when used as a potentiometer. It is a measure of the error in step size. (3) MI = RTOT/63 or (VH-VL)/63, single pot (4) Individual array resolution. REV 1.1 10/6/00
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D.C. OPERATING CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified.) Limits Symbol
ICC1 ICC2 ISB ILI ILO VIH VIL VOL
Parameter
VCC supply current (active) VCC supply current (nonvolatile write) VCC current (standby) Input leakage current Output leakage current Input HIGH voltage Input LOW voltage Output LOW voltage
Min.
Typ.
Max.
400 1 1 10 10
Unit
A mA A A A V V V
Test Conditions
fSCK = 2MHz, SO = Open, Other Inputs = VSS fSCK = 2MHz, SO = Open, Other Inputs = VSS SCK = SI = VSS, Addr. = VSS VIN = VSS to VCC VOUT = VSS to VCC
VCC x 0.7 -0.5
VCC + 0.5 VCC x 0.1 0.4
IOL = 3mA
ENDURANCE AND DATA RETENTION Parameter
Minimum endurance Data retention
Min.
100,000 100
Unit
Data changes per bit per register Years
CAPACITANCE Symbol
COUT(5) CIN
(5)
Test
Output capacitance (SO) Input capacitance (A0, A1, SI, and SCK)
Max.
8 6
Unit
pF pF
Test Conditions
VOUT = 0V VIN = 0V
POWER-UP TIMING Symbol
tPUR(6) tPUW
(6)
Parameter
Power-up to initiation of read operation Power-up to initiation of write operation VCC Power up ramp
Min.
1 5 0.2
Max.
1 5 50
Unit
ms ms V/msec
tRVCC
POWER-UP AND POWER-DOWN There are no restrictions on the power-up or powerdown sequencing of the bias supplies VCC, V+, and V- provided that all three supplies reach their final values within 1msec of each other. However, at all times, the voltages on the potentiometer pins must be less than V+ and more than V-. The recall of the wiper position from nonvolatile memory is not in effect until all supplies reach their final value.
EQUIVALENT A.C. LOAD CIRCUIT
5V 1533 SDA Output 100pF 100pF 2.7V
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X9410
A.C. TEST CONDITIONS Input pulse levels
Input rise and fall times Input and output timing level VCC x 0.1 to VCC x 0.9 10ns VCC x 0.5
RTOTAL RH CH CW 25pF RW CL 10pF RL
Test Circuit #3 SPICE Macro Model
Notes: (5) This parameter is periodically sampled and not 100% tested (6) tPUR and tPUW are the delays required from the time the third (last) power supply (VCC, V+ or V-) is stable until the specific instruction can be issued. These parameters are periodically sampled and not 100% tested.
10pF
AC TIMING Symbol
fSCK tCYC tWH tWL tLEAD tLAG tSU tH tRI tFI tDIS tV tHO tRO tFO tHOLD tHSU tHH tHZ tLZ TI tCS tWPASU tWPAH SSI/SPI clock frequency SSI/SPI clock cycle time SSI/SPI clock high time SSI/SPI clock low time Lead time Lag time SI, SCK, HOLD and CS input setup time SI, SCK, HOLD and CS input hold time SI, SCK, HOLD and CS input rise time SI, SCK, HOLD and CS input fall time SO output disable time SO output valid time SO output hold time SO output rise time SO output fall time HOLD time HOLD setup time HOLD hold time HOLD low to output in high Z HOLD high to output in low Z Noise suppression time constant at SI, SCK, HOLD and CS inputs CS deselect time WP, A0 and A1 setup time WP, A0 and A1 hold time 2 0 0 400 100 100 100 100 20 0 50 50 0 500 200 200 250 250 50 50 2 2 500 100
Parameter
Min.
Max.
2.0
Unit
MHz ns ns ns ns ns ns ns s s ns ns ns ns ns ns ns ns ns ns ns s ns ns
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X9410
HIGH-VOLTAGE WRITE CYCLE TIMING Symbol
tWR
Parameter
High-voltage write cycle time (store instructions)
Typ.
5
Max.
10
Unit
ms
XDCP TIMING Symbol
tWRPO tWRL tWRID
Parameter
Wiper response time after the third (last) power supply is stable Wiper response time after instruction issued (all load instructions) Wiper response time from an active SCL/SCK edge (increment/decrement instruction)
Min. Max.
10 10 450
Unit
s s ns
SYMBOL TABLE
WAVEFORM INPUTS Must be steady May change from Low to High May change from High to Low Don't Care: Changes Allowed N/A OUTPUTS Will be steady Will change from Low to High Will change from High to Low Changing: State Not Known Center Line is High Impedance
TIMING DIAGRAMS Input Timing
tCS CS tLEAD SCK tSU SI MSB tH tWL tCYC tLAG
...
tWH
tFI LSB
tRI
...
SO
High Impedance
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X9410
Output Timing
CS
SCK tV SO MSB tHO
... tDIS ... LSB
SI
ADDR
Hold Timing
CS tHSU SCK tRO SO tHZ SI tHOLD HOLD tLZ tFO tHH
...
XDCP Timing (for All Load Instructions)
CS
SCK
...
tWRL MSB
SI
...
LSB
VW/RW
SO
High Impedance
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X9410
XDCP Timing (for Increment/Decrement Instruction)
CS
SCK
...
tWRID
VW/RW
...
SI
ADDR
Inc/Dec
Inc/Dec
...
SO
High Impedance
Write Protect and Device Address Pins Timing
CS tWPASU WP A0 A1
(Any Instruction) tWPAH
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X9410
APPLICATIONS INFORMATION Basic Configurations of Electronic Potentiometers
VR VR
VW/RW
I Three terminal Potentiometer; Variable voltage divider Two terminal Variable Resistor; Variable current
Application Circuits
Noninverting Amplifier VS + - VO VIN 317 R1 R2 R1 VO (REG) Voltage Regulator
Iadj R2
VO = (1+R2/R1)VS
VO (REG) = 1.25V (1+R2/R1)+Iadj R2
Offset Voltage Adjustment
Comparator with Hysteresis
R1 VS 100K - +
R2
VS
- + VO
VO
}
}
TL072 10K 10K +12V 10K -12V
R1
R2
VUL = {R1/(R1+R2)} VO(max) VLL = {R1/(R1+R2)} VO(min)
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X9410
Application Circuits (continued)
Attenuator C VS R1 - VS R3 R4 All RS = 10k R1 + VO R2 R + - Filter
R2
VO = G VS -1/2 G +1/2
GO = 1 + R2/R1 fc = 1/(2RC)
Inverting Amplifier R1 R2
Equivalent L-R Circuit
}
VS
}
- + VO
C1 VS
R2 + -
VO = G VS G = -R2/R1
ZIN
R1 R3
ZIN = R2 + s R2 (R1 + R3) C1 = R2 + s Leq (R1 + R3) >> R2
Function Generator C
- +
R2
R1 - +
} RA } RB
frequency R1, R2, C amplitude RA, RB
REV 1.1 10/6/00
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Characteristics subject to change without notice.
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X9410
PACKAGING INFORMATION 24-Lead Plastic Dual In-Line Package Type P
1.265 (32.13) 1.230 (31.24)
0.557 (14.15) 0.530 (13.46) Pin 1 Index Pin 1 1.100 (27.94) Ref. 0.080 (2.03) 0.065 (1.65)
Seating Plane 0.150 (3.81) 0.125 (3.18)
0.162 (4.11) 0.140 (3.56) 0.030 (0.76) 0.015 (0.38)
0.110 (2.79) 0.090 (2.29)
0.065 (1.65) 0.040 (1.02)
0.022 (0.56) 0.014 (0.36)
0.625 (15.87) 0.600 (15.24)
Typ. 0.010 (0.25)
0 15
NOTE: 1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 2. PACKAGE DIMENSIONS EXCLUDE MOLDING FLASH
REV 1.1 10/6/00
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Characteristics subject to change without notice.
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X9410
PACKAGING INFORMATION 24-Lead Plastic Small Outline Gull Wing Package Type S
0.290 (7.37) 0.393 (10.00) 0.299 (7.60) 0.420 (10.65) Pin 1 Index Pin 1
0.014 (0.35) 0.020 (0.50) 0.598 (15.20) 0.610 (15.49) (4X) 7 0.092 (2.35) 0.105 (2.65) 0.003 (0.10) 0.012 (0.30)
0.050 (1.27)
0.050" Typical 0.010 (0.25) X 45 0.020 (0.50) 0.050" Typical 0.009 (0.22) 0.013 (0.33) 0.015 (0.40) 0.050 (1.27) 0.420"
0 - 8
FOOTPRINT
0.030" Typical 24 Places
NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
REV 1.1 10/6/00
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Characteristics subject to change without notice.
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X9410
PACKAGING INFORMATION 24-Lead Plastic, TSSOP Package Type V
.026 (.65) BSC
.169 (4.3) .252 (6.4) BSC .177 (4.5)
.303 (7.70) .311 (7.90)
.047 (1.20) .0075 (.19) .0118 (.30)
.002 (.06) .005 (.15)
.010 (.25) Gage Plane 0-8 .020 (.50) .030 (.75) Detail A (20X) (0.42) (0.65) .031 (.80) .041 (1.05) See Detail "A" ALL MEASUREMENTS ARE TYPICAL Seating Plane (1.78) (4.16) (7.72)
NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
REV 1.1 10/6/00
www.xicor.com
Characteristics subject to change without notice.
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X9410
Ordering Information X9410 Device Y P T V VCC Limits Blank = 5V 10% -2.7 = 2.7 to 5.5V Temperature Range Blank = Commercial = 0C to +70C I = Industrial = -40C to +85C Package P24 = 24-Lead Plastic DIP S24 = 24-Lead SOIC V24 = 24-Lead TSSOP Potentiometer Organization Pot 0 Pot 1 W= 10K 10K
LIMITED WARRANTY
(c)Xicor, Inc. 2000 Patents Pending
Devices sold by Xicor, Inc. are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Xicor, Inc. makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Xicor, Inc. makes no warranty of merchantability or fitness for any purpose. Xicor, Inc. reserves the right to discontinue production and change specifications and prices at any time and without notice. Xicor, Inc. assumes no responsibility for the use of any circuitry other than circuitry embodied in a Xicor, Inc. product. No other circuits, patents, or licenses are implied. TRADEMARK DISCLAIMER: Xicor and the Xicor logo are registered trademarks of Xicor, Inc. AutoStore, Direct Write, Block Lock, SerialFlash, MPS, and XDCP are also trademarks of Xicor, Inc. All others belong to their respective owners. U.S. PATENTS Xicor products are covered by one or more of the following U.S. Patents: 4,326,134; 4,393,481; 4,404,475; 4,450,402; 4,486,769; 4,488,060; 4,520,461; 4,533,846; 4,599,706; 4,617,652; 4,668,932; 4,752,912; 4,829,482; 4,874,967; 4,883,976; 4,980,859; 5,012,132; 5,003,197; 5,023,694; 5,084,667; 5,153,880; 5,153,691; 5,161,137; 5,219,774; 5,270,927; 5,324,676; 5,434,396; 5,544,103; 5,587,573; 5,835,409; 5,977,585. Foreign patents and additional patents pending. LIFE RELATED POLICY In situations where semiconductor component failure may endanger life, system designers using this product should design the system with appropriate error detection and correction, redundancy and back-up features to prevent such an occurrence. Xicor's products are not authorized for use in critical components in life support devices or systems. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
REV 1.1 10/6/00
www.xicor.com
Characteristics subject to change without notice.
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