SA5775A Datasheet, PDF (4/10 Pages) NXP Semiconductors – Differential air core meter driver

Philips Semiconductors
Differential air-core meter driver
Product specification
SA5775A
Table 2. SA5775A Pin Descriptions for the D Package (Small Outline)
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.
NC No connect
4.
NC No connect
5.
NC No connect
6.
A_GND Ground for V_IGN supply. Pins 6, 20 and 23 connected on the circuit board.
7.
V_IGN Analog supply. Nominally 14.0V.
8.
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.
9. 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.
10.
NC No connect
11.
NC No connect
12.
NC No connect
13.
V_CC 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. S_CLK Serial clock input. Data is loaded into the part on the rising edge of S_CLK.
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
Status output from this IC to indicate that the outputs have been disabled. The outputs may be disabled due to shorted out-
19.
ST 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. D_GND Ground for V_CC supply. Connect to Pins 6 and 23.
21.
NC No connect
22.
NC No connect
23. A_GND Ground for V_BB supply. Connect to Pins 6 and 20.
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.
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
V_IGN
V_CC
D_GND to A_GND
V_IN
P_D
Analog supply
Digital supply
Ground difference
Digital input voltage, Data In, OE, CS, S_CLK
Power dissipation (T_A = 25°C)¹
D and N packages
T_A
Ambient operating temperature
T_J
Junction temperature
θ_JA
DIP and SO packages
NOTE:
1. For power dissipation ratings in still air, derate above 25°C at the following rates:
D and N packages at 12mW/°C
RATING
-1 to +23
-1 to +6
-0.3 to +0.3
-1 to +7
1500
–40 to +85
150
90
UNIT
V
V
V
V
mW
°C
°C
°C/W
1999 Sep 20
4