INTEGRATED CIRCUITS SA5775A Differential air core meter driver Product specification Supersedes data of 1997 Feb 24 1999 Sep 20 Philips Semiconductors Product specification Differential air-core meter driver SA5775A DESCRIPTION PIN CONFIGURATION The SA5775A is a monolithic driver for controlling air-core (or differential) meters typically used in automotive instrument cluster applications. The circuit interfaces with a microprocessor through a serial bus and directly drives the air-core meter. The SA5775A has 10-bit resolution (0.35 degree) and is guaranteed to be monotonic. Data can be shifted through the part, allowing several SA5775As to be cascaded with only one chip-select line. On-chip current shut down logic protects the circuit from external faults. N Package FEATURES • 10-Bit resolution (0.35 degrees) • Exceptional accuracy (0.25 degrees, typical) • High-torque capability • Active differential drivers eliminate back-EMF issues • No RFI/EMI generation issues • Simple serial interface • Simple cascading capability for multiple meters • Internal fault protection • Only one external component required (bypass capacitor) SIN- 1 16 COS+ SIN+ 2 15 COS- AGND 3 14 AGND VIGN 4 13 DGND DATAOUT 5 12 nc DATAIN 6 11 ST VCC 7 10 CS OE 8 9 SCLK D Package APPLICATION • Instrumentation utilizing air-core meters SIN- 1 28 COS+ SIN+ 2 27 COS- NC 3 26 NC NC 4 25 NC NC 5 24 NC AGND 6 23 AGND VIGN 7 22 NC DATAOUT 8 21 NC DATAIN 9 20 DGND NC 10 19 ST NC 11 18 NC NC 12 17 NC VCC 13 16 CS OE 14 15 SCLK SL00453 Figure 1. Pin configuration ORDERING INFORMATION DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG # 16-Pin Plastic Dual In-Line Package (DIP) -40 to +85°C SA5775AN SOT38-4 28-Pin Small Outline Package (SO) -40 to +85°C SA5775AD SOT136-1 1999 Sep 20 2 853-1929 022369 Philips Semiconductors Product specification Differential air-core meter driver SA5775A BLOCK DIAGRAM 6 5 7 4 3 2 3 8 9 LOGIC 1 10 16 DAC MUX 15 SHUT–DOWN LOGIC 11 12 13 14 SL00454 Figure 2. Block diagram Table 1. SA5775A Pin Descriptions for the N Package (Dual In-Line) Pin # Name 1. SIN– Negative output connection to the SIN coil of the gauge. Function 2. SIN+ Positive output connection to the SIN coil of the gauge. 3. AGND Ground for VIGN supply. Pins 3, 13 and 14 connected on the circuit board. 4. VBB 5. DATAOUT Serial data output. Output of the internal shift register. When a new data word is shifted in, the old word is shifted out the DATAOUT pin. 6. DATAIN Serial data input. A new data word is serially shifted into the part on the rising edge of SCLK. The data is shifted in MSB first. 7. VCC 5 V logic supply. The internal latches and registers are set to zero on the rising edge of this signal. 8. OE Output drivers are turned off when this input is low. Current draw is minimized. Analog supply. Nominally 14.0 V. 9. SCLK 10. CS Active high chip select input. When CS is high, the part is enabled to receive a new serial input word. The high-to-low transition of CS loads the new 10-bit word into the DAC registers and updates the output. 11. ST Status output from this IC to indicate that the outputs have been disabled. The outputs may be disabled due to shorted outputs, over temperature conditions, power up reset, or output enable control pin .This output is an open drain output .Multiple status outputs may be wire OR’ed together .This output is low when the outputs are disabled due to a fault condition. 12. nc Not connected 13. DGND Ground for VCC supply. Connect to Pins 3 and 14. 14. AGND Ground for VBB supply. Connect to Pins 3 and 13. 15. COS– Negative output connection to the COS coil of the gauge. 16. COS+ Positive output connection to the COS coil of the gauge. 1999 Sep 20 Serial clock input. Data is loaded into the part on the rising edge of SCLK. 3 Philips Semiconductors Product specification Differential air-core meter driver SA5775A Table 2. SA5775A Pin Descriptions for the D Package (Small Outline) Pin # Name 1. SIN– Negative output connection to the SIN coil of the gauge. Function 2. SIN+ Positive output connection to the SIN coil of the gauge. 3. NC No connect 4. NC No connect 5. NC No connect 6. AGND Ground for VIGN supply. Pins 6, 20 and 23 connected on the circuit board. 7. VIGN Analog supply. Nominally 14.0V. 8. DATAOUT Serial data output. Output of the internal shift register. When a new data word is shifted in, the old word is shifted out the DATAOUT pin. Serial data input. A new data word is serially shifted into the part on the rising edge of SCLK. The data is shifted in MSB first. 9. DATAIN 10. NC No connect 11. NC No connect 12. NC No connect 13. VCC 5 V logic supply. The internal latches and registers are set to zero on the rising edge of this signal. 14. OE Output drivers are turned off when this input is low. Current draw is minimized. 15. SCLK 16. CS Active high chip select input. When CS is high, the part is enabled to receive a new serial input word. The high-to-low transition of CS loads the new 10-bit word into the DAC registers and updates the output. 17. NC No connect 18. NC No connect 19. ST Status output from this IC to indicate that the outputs have been disabled. The outputs may be disabled due to shorted outputs, over temperature conditions, power up reset, or output enable control pin. This output is an open drain output. Multiple status outputs may be wire OR’ed together. This output is low when the outputs are disabled due to a fault condition. 20. DGND 21. NC No connect 22. NC No connect 23. AGND 24. NC No connect 25. NC No connect 26. NC No connect 27. COS– Negative output connection to the COS coil of the gauge. 28. COS+ Positive output connection to the COS coil of the gauge. Serial clock input. Data is loaded into the part on the rising edge of SCLK. Ground for VCC supply. Connect to Pins 6 and 23. Ground for VBB supply. Connect to Pins 6 and 20. ABSOLUTE MAXIMUM RATINGS SYMBOL PARAMETER RATING UNIT VIGN Analog supply -1 to +23 V VCC Digital supply -1 to +6 V DGND to AGND Ground difference -0.3 to +0.3 V VIN Digital input voltage, Data In, OE, CS, SCLK -1 to +7 V 25°C)1 PD Power dissipation (TA = D and N packages TA Ambient operating temperature TJ θJA 1500 –40 to +85 °C Junction temperature 150 °C DIP and SO packages 90 °C/W NOTE: 1. For power dissipation ratings in still air, derate above 25°C at the following rates: D and N packages at 12mW/°C 1999 Sep 20 mW 4 Philips Semiconductors Product specification Differential air-core meter driver SA5775A DC ELECTRICAL CHARACTERISTICS VIGN = 7.5 to 18 V; VCC = 4.5 to 5.5 V; TA = –40 to +85°C. SYMBOL VIGN PARAMETER TEST CONDITIONS Ignition supply voltage LIMITS MIN 7.5 VIGN = 18 V no load VBB = 18 V with load RLC, RLS = RLMIN1,2 IIGN Ignition supply current ICC Logic supply current VCC = 5.5 V VOH Output high voltage Data out IOH = 300 µA VOL Output low voltage TYP MAX 18 UNIT V 25 mA 160 1 mA V VCC – 0.8 Data out IOL = 1.5 mA 0.4 VOL Status IOL = 2.8 mA 0.8 V IOH Status ST, VCC = 5 V 25 µA VIH Input high voltage CS, SCLK, DATAIN VIL Input low voltage CS, SCLK, DATAIN 0.3 x VCC V IIH Input high current CS, SCLK, DATAIN, VIN = 0.7 x VCC 10 µA IIL Input low current CS, SCLK, DATAIN, VIN = 0.3 x VCC ACC Output function accuracy3 RLC, RLS = RLMIN ISD Output shut-down current VDRIVE Coil drive voltage RLMIN Minimum load resistance 0.7 x VCC V 10 µA –0.5 0.5 Degree COS+, COS–, SIN+, SIN– ISINK VIGN = VIGN (MAX) VIGN = VIGN (MIN) ISOURCE VIGN = VIGN (MAX) VIGN = VIGN (MIN) 97 43 85 43 500 300 500 300 mA mA mA mA VIGN = VIGN (MAX) VIGN = VIGN (MIN) 68 78 %VIGN TA = 85°C TA = 25°C TA = –40°C 215 171 138 NOTE: 1. See Test Circuit. 2. Maximum current is when output is 45 degrees; TA = –40°C, and RL = 138 Ω. 3. See Table “Output function accuracy” Table 3. Output function accuracy Ideal 0 45 90 135 180 225 270 360 Quadrant I II III IV 1999 Sep 20 Nominal Input Code 0.176 0 45.176 128 90.176 256 135.176 384 180.176 512 225.176 640 270.176 768 359.820 1023 N = Binary Input Code Equation for Output Angle (θ) vs Output Voltage Equation θ = tan–1 | [(SIN+) – (SIN–)] / [(COS+) – (COS–)] | θ = 180° +tan–1 | [(SIN+) – (SIN–)] / [(COS+) – (COS–)] | θ = 180° +tan–1 | [(SIN+) – (SIN–)] / [(COS+) – (COS–)] | θ = 360° +tan–1 | [(SIN+) – (SIN–)] / [(COS+) – (COS–)] | 5 Ω Ω Ω Philips Semiconductors Product specification Differential air-core meter driver SA5775A AC ELECTRICAL CHARACTERISTICS VDD = 7.5 to 18 V; VCC = 4.5 to 5.5 V; TA = –40 to +85°C SYMBOL PARAMETER LIMITS TEST CONDITIONS MIN TYP MAX 1.6 UNIT FSCLK Input frequency TSCLKH SCLK high time TSCLKL SCLK low time TRO Output rise time DO 0.75 to VCC –1.2 V, CL = 90 pF 75 ns TFO Output fall time DO VCC –1.2 V to 0.75, CL = 90 pF 75 ns TSU DI set-up time 75 ns THI DI hold time 75 ns 175 VCC = 5.5 V ns 175 ns TYPICAL APPLICATION METER 14V Data Out 5 1 2 SIN– SIN+ 15 DATAOUT SA5775A SGD 9 DATAIN FROM MICROPROCESSOR 6 16 COS– COS+ 5 DO 4 VIGN NC 12 10 µF ST 11 DGND 13 SCLK OE 8 VCC AGND 14 7 5V SL00455 Figure 3. Typical application FSCLKL TSCLKH TSCLKL SCLK Tr Tf SCLK CS DI BIT9 TSU BIT8..1 BIT0 THI BIT0 PREVIOUS WORD DO SL00456 Figure 4. Serial interface timing 1999 Sep 20 6 MHz Philips Semiconductors Product specification Differential air-core meter driver 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 SA5775A SL00457 Figure 5. SA5775A Test circuit, N package 15 COS DIFFERENTIAL VOLTAGE 10 SIN 5 0 0 127 255 383 511 639 767 895 1023 –5 –10 INPUT CODE –15 SL00458 Figure 6. SA5775A output voltages (VIGN = 14 V) 0.8 0.6 ERROR (DEGREES) VBB = 14V RL = 200Ω T = 25 0.4 0.2 0.0 –0.2 –0.4 –0.6 –0.8 0 127 255 383 511 INPUT CODE Figure 7. Error graph 1999 Sep 20 7 639 767 895 1023 SL00459 Philips Semiconductors Product specification Differential air-core meter driver SA5775A DIP16: plastic dual in-line package; 16 leads (300 mil) 1999 Sep 20 8 SOT38-4 Philips Semiconductors Product specification Differential air-core meter driver SA5775A SO28: plastic small outline package; 28 leads; body width 7.5mm 1999 Sep 20 9 SOT136-1 Philips Semiconductors Product specification Differential air-core meter driver SA5775A Data sheet status Data sheet status Product status Definition [1] Objective specification Development This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. Preliminary specification Qualification This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. Product specification Production This data sheet contains final specifications. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. [1] Please consult the most recently issued datasheet before initiating or completing a design. Definitions Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Disclaimers Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Copyright Philips Electronics North America Corporation 1999 All rights reserved. Printed in U.S.A. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088–3409 Telephone 800-234-7381 Date of release: 09-99 Document order number: 1999 Sep 20 10 9397 750 06445