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| HTMOSTM High Temperature Products Advance Information HIGH TEMPERATURE P COMPATIBLE 12-BIT A/D CONVERTER FEATURES * Specified Over -55 to +225C * Includes On-Chip Clock, Reference, P Interface and Sample/Hold * 11-Bit Linearity * Industrial Process Control * 10 s Maximum Conversion, Including Acquisition * Nuclear Reactor * Hermetic 28-Lead Ceramic DIP * Electric Power Conversion * Heavy Duty Internal Combustion Engines HT574 APPLICATIONS * Down-Hole Oil Well * Avionics * Turbine Engine Control GENERAL DESCRIPTION The HT574 is a general purpose, 12-bit successive approximation A/D converter intended for applications with an extremely wide operating temperature range. Fabricated with Honeywell's dielectrically isolated high temperature (HTMOSTM) process, it is designed specifically for severe high-temperature applications. The HT574 includes a switched capacitor, digital-to-analog converter, internal reference, comparator, successive approximation register, sample and hold, oscillator and architecture which allows it to be used with minimal external components. Tristate output buffers and digital control pins are also provided for microprocessor interfacing. Analog input signal ranges of 0 to +10V, 0 to +20V, or 5V may be selected from the internal resistor scaling network. The HT574 provides 12-bit conversions in 10s over the entire -55 to +225C temperature range. Typically, parts will operate up to +300C for a year, with derated performance. All parts are burned in at 250C to eliminate infant mortality. 28-LEAD PACKAGE D C All dimensions in inches Right Reading on Lid Ceramic Body 1 E eA A b b2 C D E e eA L Q S1 S2 0.175 (max) 0.018 0.002 0.050 (typ) 0.010 to 0.002 1.400 0.014 0.594 0.010 0.100 0.005 0.600 0.010 0.125 to 0.175 0.050 0.010 0.005 (min) 0.005 (min) S2 A L b2 S1 b (width) e (pitch) Q Solid State Electronics Center * 12001 State Highway 55, Plymouth, MN 55441 * (800) 323-8295 * http://www.ssec.honeywell.com HT574 FUNCTIONAL DIAGRAM 28 STS 12_N8 NCS Ao R_NC CE 2 3 4 5 6 TIMING & CONTROL OSC VREF_OUT (5.0V) 8 REF VBG 4-BIT WORD 27 26 25 24 DB11 MSB DB10 DB9 DB8 VTRIM 1 VREF_IN (5.0V) 10 2.5K VREF = 5V TRI STATE OUTPUT BUFFERS COMP 23 DB7 DB6 DB5 DB4 4-BIT WORD 20V_IN 14 12-BIT CAPACITOR DAC (0 TO 5V) 10K 12-BIT SAR 22 21 20 10V_IN 13 5K 19 DB3 DB2 DB1 DB0 LSB 4-BIT WORD 7 9 15 1 +10V 10F//0.1F +5V 1F 18 17 16 5K BIP_OFF 12 PINOUT DIAGRAM NAME 1 2 3 4 5 6 7 8 9 10 11 FUNCTION Digital Supply (5V) Data Mode Select (1 = 12 bits; 0 = 8 bits) Chip Select (Active Low) Byte Size Select Read/Convert (1 = Read; 0 = Convert) Chip Enable (Active High) Analog Supply (10V) Reference Output (5 V) Analog Ground Reference Input Trims Vref-out Bipolar Offset 10 Volt Analog Input 20 Volt Analog Input Digital Ground 12-Bit Digital Output (DB11 = MSB, DB0 = LSB) Status VLOGIC (+5V) 12_N8 NCS Ao R_NC CE VDD (+10V) VREF_OUT AGND VREF_IN VTRIM STS 28 DB11 27 DB10 26 DB9 25 DB8 24 DB7 23 DB6 22 DB5 21 DB4 20 DB3 19 DB2 18 DB1 17 DB0 16 DGND 15 VLOGIC 12_N8 NCS Ao R_NC CE VDD VREF_OUT AGND VREF_IN VTRIM BIP_OFF 10V_IN 20V_IN DGND DB0:11 STS 12 BIP_OFF 13 10V_IN 14 20V_IN 2 HT574 DC ELECTRICAL CHARACTERISTICS P arame te r Resolution Integral Non-Linearity (INL) Differential Non-Linearity (DNL) Unipolar Offset Error Bipolar Offset Error Full Scale Calibration Error (1) Temperature Coefficients Unipolar Offset Bipolar Offset Full Scale Calibration Power Supply Rejection +9.0V Conditions Tmin to Tmax Tmin to Tmax Adjustable to zero Adjustable to zero No adjustment at +25C, Tmin to Tmax With adjustment at +25C, Tmin to Tmax Using internal reference, Tmin to Tmax Typ Min Max 12 1 1 2 10 Units Bits LSB LSB LSB LSB % of FS % of FS 0.8 0.5 2 (5) 4 (10) 20 (50) LSB (ppm/C) LSB (ppm/C) LSB (ppm/C) LSB LSB Max change in full scale calibration 2 0.5 -5 0 0 Temperature coefficient = 100ppm/C 3.3 13.3 2.64 10.64 +4.5 +9 1 7 VDD = 10V, VLOGIC = 5 V 75 5 4.965 3.96 15.96 +5.5 +11 3 9 105 5.035 8 K k V V mA mA mW V mA +5 +10 +20 V V V 3 HT574 DIGITAL CHARACTERISTICS Parameter Logic Inputs (CE, NCS, R_NC, Ao, 12_N8) Logic "1" Logic "0" Current Capacitance Logic Outputs (DB11-DBO, STS) Logic "0" Logic "1" Leakage Capacitance (ISink = 1.6mA) (ISource = 500A) (High Z state, DB11-DBO only) 0.1 5 +2.4 -5 +5 +0.4 V V A pF 0 to +5.5V input 0.01 5 2.4 -0.5 5.5 +0.8 +5 V V A pF Conditions Temperature ranges = -55 to +225C, VDD = 10.0V 10% Typical @ +25C, Vlogic = +5V, unless otherwise specified Typical Min Max Units READ MODE AC TIMING CHARACTERISTICS Symbol tDD tHD tHL tSSR tSRR tSAR tHSR tHRR tHAR tHS Parameter Access Time from CE Data Valid after CE Low Output Float Delay NCS to CE Setup R_NC to CE Setup Ao to CE Setup NCS Valid after CE Low R_NC High after CE Low Ao Valid after CE Low STS Delay after Data Valid Temperature ranges = -55 to +225C, VDD = 10.0V 10% Typical @ +25C, Vlogic = +5V, unless otherwise specified Conditions (1) Typical Min Max 150 Units ns ns 25 150 0 0 50 0 50 0 0 0 0 50 300 1000 ns ns ns ns ns ns ns ns (1) Time is measured from 50% level of digital transitions. Tested with a 100pF and 3k load for high impedance to drive and tested with 10pF and 3k load for drive to high impedance. 4 HT574 CONVERT MODE TIMING CHARACTERISTICS Symbol tDSC tHEC tSSC tHCS tSRC tHRC tSAC tHAC tC Parameter STS Delay from CE CE Pulse Width NCS to CE Setup NCS Low during CE High R_NC to CE Setup R_NC Low during CE High Ao to CE Setup Ao Valid during CE High Conversion Time 12-Bit Cycle 8-Bit Cycle Including Acquisition Tmin to Tmax Tmin to Tmax 50 50 50 50 50 0 50 10 7.2 Conditions (1) Temperature ranges = -55 to +225C, VDD = 10.0V 10% Typical @ +25C, Vlogic = +5V, unless otherwise specified Typical Min Max 200 Units ns ns ns ns ns ns ns ns s s (1) Time is measured from 50% level of digital transitions. Tested with a 100pF and 3k load for high impedance to drive and tested with 10pF and 3k load for drive to high impedance. CONVERT MODE TIMING DIAGRAM READ MODE TIMING DIAGRAM CE CE tSSC NCS tHEC NCS tSSR tHSR tHRR tSRC R_NC tHSC R_NC tHRC tSRR Ao Ao tSAC tHAC tSAR tHAR STS tDSC tC STS High Impedance DB11-DB0 High DB11-DB0 Impedance tDD tHS Data Valid tHD tHL 5 HT574 STAND ALONE MODE TIMING CHARACTERISTICS Symbol tHRL tDS tHDR tHS tHRH tDDR Parameter Low R_NC Pulse Width STS Delay from R_NC Data Valid after R_NC Low STS Delay after Data Valid High R_NC Pulse Width Data Access Time 25 300 150 150 1000 Temperature ranges = -55 to +225C, VDD = 10.0V 10% Typical @ +25C, Vlogic = +5V, unless otherwise specified Conditions (1) Typical Min 50 Max Units ns 200 ns ns ns ns ns SAMPLE AND HOLD CHARACTERISTICS Parameter Acquisition Time Aperture Uncertainty Time Conditions (1) -55 to 225C, VDD = +10V, VLOGIC = +5V Unless otherwise specified Typical Min Max 1.26 Units s ns 20 (1) Time is measured from 50% level of digital transitions. Tested with a 100pF and 3k load for high impedance to drive and tested with 10pF and 3k load for drive to high impedance. STAND ALONE MODE TIMING LOW PULSE FOR R_NC tHRL R_NC STAND ALONE MODE TIMING HIGH PULSE FOR R_NC R_NC tDS tHRH tDS STS tC tHDR tHS STS tDDR tHDR tC Data Valid DB11-DB0 Data Valid High-Z DB11-DB0 Data Valid High-Z 6 HT574 UNIPOLAR INPUT CONNECTIONS 100K -15V +15V VIN (0 TO 20V) Range 14 10K 13 5K 100K VIN (0 TO 10V) Range BIP_OFF 12 5K VIN (0 TO 5V) 100 VREF_OUT 8 REF OUT = 5V VBG REF 11 VREF_IN 10 2.5K VREF = 5V VTRIM Note: If no offset adjustment is required, BIP_OFF can be tied directy to AGND (0 volts). BIPOLAR INPUT CONNECTIONS Open 14 VIN (5V) Range 13 10K 5K BIP_OFF 12 5K VIN (0 TO 5V) VREF_OUT 8 REF OUT = 5V VBG REF 11 VREF_IN 10 2.5K VREF = 5V VTRIM 7 HT574 TRUTH TABLE FOR HT574 CONTROL Case 1 2 3 4 5 6 7 8 9 10 11 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 CE 0 X NCS X 1 0 0 R_NC X X 0 0 0 0 12_N8 X X X X X X X X 1 0 0 A0 X X 0 1 0 1 0 1 X 0 1 None None Initiate 12 Bit Conversion Initiate 8 Bit Conversion Initiate 12 Bit Conversion Initiate 8 Bit Conversion Initiate 12 Bit Conversion Initiate 8 Bit Conversion Enable 12 Bit Output Enable 8 MSB's Only Enable 4 LSB's + 4 Trailing Zero's Operation ABSOLUTE MAXIMUM RATINGS (1) VDD to Analog Common ........................................................................................................................... 0V to +12.5V VLOGIC to Digital Common ........................................................................................................................... 0V to +7V Analog Common to Digital Common ....................................................................................................................... 1V Control Inputs (CE, NCS, 12_N8, Ao, R_NS) to Digital Common............................................ -0.5V to VLOGIC +0.5V Analog Inputs (VREF_IN, BIP_OFF, 10V_IN) to Analog Common .................................................................... 12.5V 20V_IN to Analog Common .................................................................................................................................. 24V VREF_OUT ............................................................................................................... Indefinite Short Circuit to Ground Power Dissipation ........................................................................................................................................... 1000mW Storage Temperature .............................................................................................................................. -65 to +325C Lead Temperature (Attachment, 10 sec.) ............................................................................................................ 355C ESD Protection .................................................................................................................................................... 2000V (1) Stresses in excess of those listed above may result in permanent damage. These are stress ratings only, and operation at these levels is not implied. Frequent or extended exposure to absolute maximum conditions may effect device reliability. To learn more about Honeywell Solid State Electronics Center, visit our web site at http://www.ssec.honeywell.com Honeywell reserves the right to make changes to any products or technology herein to improve reliability, function or design. Honeywell does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Helping You Control Your World 900177 Rev. B 4-98 8 |
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