SA5775A Datasheet, PDF (3/10 Pages) NXP Semiconductors – Differential air core meter driver

Philips Semiconductors
Differential air-core meter driver
Product specification
SA5775A
BLOCK DIAGRAM
8
9
10
6
5
7
4
3
LOGIC
DAC
MUX
11
12
13
14
Figure 2. Block diagram
SHUT–DOWN
LOGIC
2
3
1
16
15
SL00454
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.
A_GND Ground for V_IGN supply. Pins 3, 13 and 14 connected on the circuit board.
4.
V_BB Analog supply. Nominally 14.0 V.
5. DATA_OUT Serial data output. Output of the internal shift register. When a new data word is shifted in, the old word is shifted out the
DATA_OUT pin.
6. DATA_IN Serial data input. A new data word is serially shifted into the part on the rising edge of S_CLK. The data is shifted in MSB first.
7.
V_CC 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.
S_CLK Serial clock input. Data is loaded into the part on the rising edge of S_CLK.
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. D_GND Ground for V_CC supply. Connect to Pins 3 and 14.
14. A_GND Ground for V_BB 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
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