SA5775N datasheet(4/10 Pages) PHILIPS

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Philips Semiconductors

Product specification

SA5775A

Differential air-core meter driver

1999 Sep 20

Table 2.

SA5775A Pin Descriptions for the D Package (Small Outline)

Pin #

Name

Function

SIN–

Negative output connection to the SIN coil of the gauge.

SIN+

Positive output connection to the SIN coil of the gauge.

No connect

AGND

Ground for VIGN supply. Pins 6, 20 and 23 connected on the circuit board.

VIGN

Analog supply. Nominally 14.0V.

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.

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.

10.

No connect

11.

No connect

12.

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.

Output drivers are turned off when this input is low. Current draw is minimized.

15.

SCLK

Serial clock input. Data is loaded into the part on the rising edge of SCLK.

16.

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.

No connect

18.

No connect

19.

Status output from this IC to indicate that the outputs have been disabled. The outputs may be disabled due to shorted out-

puts, 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

Ground for VCC supply. Connect to Pins 6 and 23.

21.

No connect

22.

No connect

23.

AGND

Ground for VBB supply. Connect to Pins 6 and 20.

24.

No connect

25.

No connect

26.

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.

ABSOLUTE MAXIMUM RATINGS

SYMBOL

PARAMETER

RATING

UNIT

VIGN

Analog supply

-1 to +23

VCC

Digital supply

-1 to +6

DGND to AGND

Ground difference

-0.3 to +0.3

VIN

Digital input voltage, Data In, OE, CS, SCLK

-1 to +7

Power dissipation (TA = 25°C)1

D and N packages

1500

Ambient operating temperature

–40 to +85

°C

Junction temperature

150

°C

θJA

DIP and SO packages

°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

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