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Part: SA5775AN
Category:
Timing Circuits
-> Timers
-> Timers, oscillators and counters
Description: SA5775A; Differential AIR Core Meter Driver;; Package: SOT38-4 (DIP16)
Company: Philips Semiconductors
Datasheet: Download SA5775AN datasheet File size : 146 kB
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Datasheet text preview:
INTEGRATED CIRCUITS
SA5775A Differential air core meter driver
Product specification Supersedes data of 1999 Sep 20 2000 Aug 10
Philips Semiconductors
Philips Semiconductors
Product specification
Differential air-core meter driver
SA5775A
DESCRIPTION
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.
PIN CONFIGURATION
N Package
SINSIN+ AGND VIGN 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 COS+ COSAGND DGND nc ST CS S CLK
FEATURES
DATAOUT DATAIN V CC OE
· 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)
APPLICATION
D Package
SIN- 1 SIN+ 2 NC 3 NC 4 NC 5 AGND 6 VIGN DATAOUT DATAIN 7 8 9 28 27 26 25 24 23 22 21 20 19 18 17 16 15 COS+ COSNC NC NC AGND NC NC DGND ST NC NC CS S CLK
· Instrumentation utilizing air-core meters
NC 10 NC 11 NC 12 VCC 13 OE 14
SL00453
Figure 1. Pin configuration
ORDERING INFORMATION
DESCRIPTION 16-Pin Plastic Dual In-Line Package (DIP) 28-Pin Small Outline Package (SO) TEMPERATURE RANGE -40 to +85°C -40 to +85°C ORDER CODE SA5775AN SA5775AD DWG # SOT38-4 SOT136-1
2000 Aug 10
2
853-1929 024325
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
SHUTDOWN LOGIC
11
12
13
14
SL01252
Figure 2. Block diagram, pin numbers for DIL package
Table 1. SA5775A Pin Descriptions for the N Package (Dual In-Line)
Pin # 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Name SIN SIN+ AGND VIGN DATAOUT DATAIN VCC OE SCLK CS ST Negative output connection to the SIN coil of the gauge. Positive output connection to the SIN coil of the gauge. Ground for VIGN supply. Pins 3, 13 and 14 connected on the circuit board. Analog supply. Nominally 14.0 V. 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. 5 V logic supply. The internal latches and registers are set to zero on the rising edge of this signal. Output drivers are turned off when this input is low. Current draw is minimized. Serial clock input. Data is loaded into the part on the rising edge of SCLK. 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. 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. Not connected Ground for VCC supply. Connect to Pins 3 and 14. Ground for VBB supply. Connect to Pins 3 and 13. Negative output connection to the COS coil of the gauge. Positive output connection to the COS coil of the gauge. Function
12. 13. 14. 15. 16.
nc DGND AGND COS COS+
2000 Aug 10
3
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