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DA6012.000 30 June 2008
MAS6012
This is preliminary information on a new product under development. Micro Analog Systems Oy reserves the right to make any changes without notice.
Stepper Motor Driver IC
* Supports Microstepping Movement * Capable to Drive One to Four Motors * Low Operating Voltage
DESCRIPTION
MAS6012 is a miniature stepper motor driver IC to drive up to four stepper motors. Applications include motorcycle and car dashboards and miniature stepper motor appliances. MAS6012 features a microstepping function to allow smooth movement of the motor shaft. Full rotor revolution consists of 24 microsteps each having 15 degree angular rotation. With gear reduction of 180 the microstep corresponds to an angular rotation of 1/12 degree of the motor shaft. The actual precision of the position is affected by the gear play of the motor. The microstepping movement of the motor shaft is achieved by converting a pulse sequence into a current level sequence sent to the stepper motor coils.
FEATURES
* Bipolar Stepper Motor Driver Outputs * Drives One to Four Stepper Motors * Microstepping Function * Glitch Filters at All Inputs * Low Operating Voltage * TSSOP-28 Package
APPLICATIONS
* Motorcycle Dashboards * Car Dashboards * Nautical Instrumentation * Miniature Stepper Motors in Appliances
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DA6012.000 30 June 2008
BLOCK DIAGRAMS
VDD FSCXA CWA Glitch Filter Glitch Filter
VDD Output Driver A OUTA1 OUTA2 OUTA3 OUTA4 Output Driver B
FSCXB CWB
Glitch Filter Glitch Filter Output Driver C
OUTB1 OUTB2 OUTB3 OUTB4
FSCXC CWC
Glitch Filter Glitch Filter Output Driver D
OUTC1 OUTC2 OUTC3 OUTC4
FSCXD CWD
Glitch Filter Glitch Filter Glitch Filter
OUTD1 OUTD2 OUTD3 OUTD4
XRESET
MAS6012AA4
VSS
Figure 1. Block diagram quad output stepper motor driver IC MAS6012AA4
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DA6012.000 30 June 2008
OPERATION DESCRIPTION
MAS6012 is a stepper motor driver IC specifically designed to drive bipolar stepper motors of pointers in a car and motorcycle dashboard and in the other similar applications. The IC is operated from single 5V supply. Each stepper motor output is controlled by two digital control signal inputs, FSCX and CW. Each rising edge of FSCX stepping clock input causes stepper motor to step one microstep (15 degree angular rotation of rotor) ahead. Rotation direction is determined by CW rotation direction selection signal. High CW selects clockwise direction and low CW selects counterclockwise direction. Each of the four stepper motor drivers (A, B, C, D) have their own FSCX and CW control inputs. For each of the motors there are four outputs. Outputs OUTx1 and OUTx2 are for driving first motor coil and outputs OUTx3 and OUTx4 are for driving second motor coil where x is one of the four motor drivers A, B, C or D. The output signal waveforms consist of digitized sine waves which have 60 phase shift (see figure 2). The device has common XRESET master reset control input for resetting stepper motor outputs to initial state. The initial state corresponds to step number 1 state (see figure 2). XRESET is active low. Each digital input has a glitch filter for eliminating effects of electrical disturbances at the control inputs. It is recommended to keep XRESET signal low (active) during power up until the supply voltage VDD has risen up.
MAS6012 Microstepping Output Waveform
5 4 3 2 1 Uout [V] 0 -1 -2 -3 -4 -5 0.5 1 1.5 2 2.5 33.5 44.5 5 5.5 6 77.5 88.5 99.510 11 12 13 14 15 16 17 18 19 20 21 22 23 24 6.5 10.5 11.5 12.5 13.5 14.5 15.5 16.5 17.5 18.5 19.5 20.5 21.5 22.5 23.5 24.5 Step [No] OUTx1-OUTx2 OUTx4-OUTx3
Phase shift 60 (4 steps)
Figure 2. MAS6012 Microstepping Output Waveform (x=A, B, C or D)
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DA6012.000 30 June 2008
ABSOLUTE MAXIMUM RATINGS
All voltages with respect to ground
Parameter Supply Voltage Voltage Range for All Pins ESD Rating Junction Temperature Storage Temperature
Symbol VIN
Conditions
Min -0.3 -0.3 2
Max 5.8 VIN + 0.3 +175
(limited)
Unit V V kV C C
Human Body model (HBM) TJmax TS
-50
+125
Stresses beyond those listed may cause permanent damage to the device. The device may not operate under these conditions, but it will not be destroyed.
RECOMMENDED OPERATING CONDITIONS
Parameter Operating Supply Voltage Operating Ambient Temperature Symbol VDD TA Conditions Min 4.5 -40 Typ 5.0 Max 5.5 +85 Unit V C
ELECTRICAL CHARACTERISTICS
N Load Characteristics Parameter Coil resistance Phase inductance Symbol RCOIL LCOIL Conditions TA = 25 C TA = 25 C Min 190 Typ 290 0.4 Max 340 Unit Ohm H
N Current Parameters
TA = -40 to +85 typical values at TA = +25 RCOIL = 290 , VDD = 5.0 V, unless otherwise specified C C, C,
Parameter Quiescent current Typical supply current consumption
Symbol ICC IC
Conditions All inputs at VDD or VSS, no load One motor Two motors Three motors Four motors For each output pin, RCOIL = 190
Min
Typ
Max 300
Unit A mA
18 36 53 71 29
Output drive capability
IOUT
mA
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DA6012.000 30 June 2008
ELECTRICAL CHARACTERISTICS...
N Digital Inputs
TA = -40 to +85 typical values at TA = +25 VDD=5.0 V, unless otherwise specified C C, C,
Parameter Input High Voltage Input Low Voltage Input Leakage Input frequency
Symbol VIH VIL IILEAK fIN
Conditions VDD = 4.5...5.5V VDD = 4.5...5.5V Input VDD or VSS Driver speed limited Motor speed limited. Note 1.
Min 80% VDD 0% VDD -2.5
Typ
Max 100% VDD 20% VDD +2.5 TBD
Unit V V A kHz
7.2
Note 1. Depends on the stepper motor. TBD = To Be Defined
Power Dissipation
TA = -40 to +85 typical values at TA = +25 VDD=5.0 V, unless otherwise specified C C, C,
Parameter Junction to Ambient Thermal Resistance Maximum Power Dissipation
Symbol RJA Pd
Conditions typical PC board mounting, still air, TSSOP package any ambient temperature, TSSOP package
Min
Typ 100.4
Max
Unit C/W W
Pd MAX =
Note 1
TJ (MAX) - TA R JA
Note 1: TJ(MAX) denotes maximum operating junction temperature (+125 C), TA ambient temperature, and RJA junction-to-air thermal resistance (+144 C/W).
Timing Characteristics
TA = -40 to +85 VDD = 5.0 V, unless otherwise specified C C,
Parameter Signal pulse width Setup time to f(SCX) XRESET release time to f(SCX)
TBD = To Be Defined
Symbol tW tS tRR
Conditions High or low High or low
Min TBD TBD TBD
Typ
Max
Unit ns ns ns
Delay Timing Waveforms
FSCX
FSCX
tW
tS
t RR
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DA6012.000 30 June 2008
APPLICATION INFORMATION
VCC
VCC
22F
100nF
100nF
+
GND VDD VDD FSCXA CWA VDD
GND Output Driver A OUTA1 OUTA2 OUTA3 OUTA4 Output Driver B Stepper Motor
Glitch Filter Glitch Filter
FSCXB CWB
Glitch Filter Glitch Filter Output Driver C
C
FSCXC CWC
OUTB1 OUTB2 OUTB3 OUTB4
Stepper Motor
Glitch Filter Glitch Filter Output Driver D
OUTC1 OUTC2 OUTC3 OUTC4
Stepper Motor
FSCXD CWD
Glitch Filter Glitch Filter Glitch Filter
OUTD1 OUTD2 OUTD3 OUTD4
Stepper Motor
XRESET VSS
10 k
MAS6012AA4
VSS
GND GND GND Figure 3. Typical MAS6012AA4 quad stepper motor driver application circuit
For filtering fast voltage transients it is recommended to connect two 100nF ceramic capacitors close to power supply pins of the IC (see figure 3). Additionally there should be 5F capacitance per motor connected for latch-up protection. Thus for four motors there should be additional 22F filtering capacitor connected to the supplies.
For proper power up it is recommended to keep the XRESET pin low during supplies rising. Depending on used microcontroller an external pull-down resistor might be needed to stay at reset during power up (see figure 3 external pull down resistor connected to XRESET pin).
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DA6012.000 30 June 2008
MAS6012AA4 QUAD OUTPUT DRIVER PIN CONFIGURATION IN PLASTIC TSSOP-28
1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15
MAS6012zz GYYWW XXXXX
Top Marking Definitions: zz = Version YYWW = Year Week XXXXX = Lot Number
PIN DESCRIPTION
Pin Name VDD CWB FSCXB OUTA3 OUTA4 OUTA2 OUTA1 OUTD1 OUTD2 OUTD4 OUTD3 VSS CWC FSCXC VDD CWD FSCXD OUTC3 OUTC4 OUTC2 OUTC1 OUTB1 OUTB2 OUTB4 OUTB3 XRESET CWA FSCXA Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Type P DI DI AO AO AO AO AO AO AO AO G DI DI P DI DI AO AO AO AO AO AO AO AO DI DI DI Function Positive Power Supply Rotation Direction Selection for Driver B, high = Clockwise Stepping Clock Input for Driver B Stepper Motor Driver A Coil Output 3 Stepper Motor Driver A Coil Output 4 Stepper Motor Driver A Coil Output 2 Stepper Motor Driver A Coil Output 1 Stepper Motor Driver D Coil Output 1 Stepper Motor Driver D Coil Output 2 Stepper Motor Driver D Coil Output 4 Stepper Motor Driver D Coil Output 3 Power Supply Ground Rotation Direction Selection for Driver C, high = Clockwise Stepping Clock Input for Driver C Positive Power Supply Rotation Direction Selection for Driver D, high = Clockwise Stepping Clock Input for Driver D Stepper Motor Driver C Coil Output 3 Stepper Motor Driver C Coil Output 4 Stepper Motor Driver C Coil Output 2 Stepper Motor Driver C Coil Output 1 Stepper Motor Driver B Coil Output 1 Stepper Motor Driver B Coil Output 2 Stepper Motor Driver B Coil Output 4 Stepper Motor Driver B Coil Output 3 Master Reset, active low Rotation Direction Selection for Driver A, high = Clockwise Stepping Clock Input for Driver A
A = Analog, D = Digital, P = Power, G = Ground, I = Input, O = Output
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DA6012.000 30 June 2008
PACKAGE (TSSOP-28) OUTLINES
e/ 2 A VIEW B-B b ZD
E
E1
c1
12 REF c S b1 R
1.0 DIA. 0.13 DEEP 1 A e
GAUGE PLANE
0.25 12 REF D L1
L
A
A2
b
B B b VIEW A-A
A1
Dimension A A1 A2 D E E1 L L1 e b c ZD
Min 0.05 0.90 9.70 0.05 6.10 0.10 4.40 0.10 0.60 + 0.15 / - 0.10 1.00 0.65 0.22 0.05 0.13 0.625
Max 1.20 0.10
Unit mm mm mm mm mm mm mm mm mm mm mm mm
0.20
Dimensions do not include mold flash, protrusions, or gate burrs. All dimensions are in accordance with JEDEC standard MO-153.
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DA6012.000 30 June 2008
SOLDERING INFORMATION
N For Pb-Free, RoHS Compliant TSSOP-28 Resistance to Soldering Heat Maximum Temperature Maximum Number of Reflow Cycles Reflow profile Seating Plane Co-planarity Lead Finish According to RSH test IEC 68-2-58/20 260C 3 Thermal profile parameters stated in IPC/JEDEC J-STD-020 should not be exceeded. http://www.jedec.org max 0.08 mm Solder plate 7.62 - 25.4 m, material Matte Tin
ORDERING INFORMATION
Product Code Product Package Comments
MAS6012AA1ST206 Single Output Stepper Motor Driver IC TSSOP-16 Note MAS6012AA2ST206 Dual Output Stepper Motor Driver IC TSSOP-16 Note MAS6012AA3ST206 Three Output Stepper Motor Driver IC TSSOP-28 Note MAS6012AA4ST206 Quad Output Stepper Motor Driver IC TSSOP-28 Tape and Reel Note: Contact Micro Analog Systems Oy for one to three output stepper motor driver IC version options.
LOCAL DISTRIBUTOR
MICRO ANALOG SYSTEMS OY CONTACTS
Micro Analog Systems Oy Kamreerintie 2, P.O. Box 51 FIN-02771 Espoo, FINLAND Tel. +358 9 80 521 Fax +358 9 805 3213 http://www.mas-oy.com
NOTICE Micro Analog Systems Oy reserves the right to make changes to the products contained in this data sheet in order to improve the design or performance and to supply the best possible products. Micro Analog Systems Oy assumes no responsibility for the use of any circuits shown in this data sheet, conveys no license under any patent or other rights unless otherwise specified in this data sheet, and makes no claim that the circuits are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Micro Analog Systems Oy makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification.
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