Philips Semiconductors

Product specification

SA5775A

Differential air-core meter driver

1999 Sep 20

3

BLOCK DIAGRAM

8

9

10

12

13

14

15

16

1

2

3

4

57

6

3

LOGIC

DAC

MUX

SHUT–DOWN

LOGIC

11

SL00454

Figure 2. Block diagram

Table 1.

SA5775A Pin Descriptions for the N Package (Dual In-Line)

Pin #

Name

Function

1.

SIN–

Negative output connection to the SIN coil of the gauge.

2.

SIN+

Positive output connection to the SIN coil of the gauge.

3.

4.

Analog supply. Nominally 14.0 V.

5.

6.

7.

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.

9.

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 tran-

sition 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 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.

12.

nc

Not connected

13.

14.

15.

COS–

Negative output connection to the COS coil of the gauge.

16.

COS+

Positive output connection to the COS coil of the gauge.