AMC7823 Datasheet, PDF (8/48 Pages) Texas Instruments – ANALOG MONITORING AND CONTROL CIRCUIT

AMC7823
SLAS453A – APRIL 2005 – REVISED OCTOBER 2005
PIN CONFIGURATION
(TOP VIEW)
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CONVERT
SCLK
MOSI
MISO
SS
BVDD
DVDD
DGND
GPIO−4
GPIO−5
30 29 28 27 26 25 24 23 22 21
31
20
32
19
33
18
34
17
35
16
36
15
37
14
38
13
39
12
40
11
1 2 3 4 5 6 7 8 9 10
CH7
CH6
CH5
CH4
AVDD
AGND
CH3
CH2
CH1
CH0
TERMINAL
NO.
NAME
1 GALR
2 DAV
3 ELDAC
4 ISET_RESISTOR
5 PRECISION_I_OUTPUT
6 DAC-0_OUT
7 DAC-1_OUT
8 DAC-2_OUT
9 DAC-3_OUT
10 SGND
11 CH0
TERMINAL FUNCTIONS
DESCRIPTION
Global analog input out-of-range alarm. GALR pin goes low (active) when one (or more) of the first
four accessed analog inputs is out of preset range.
Data available indicator. In the direct mode, DAV pin goes low (active) when the conversion finishes.
In Auto-mode, a 2-µs pulse (active low) appears on this pin when conversion cycle finishes (see ADC
Operation and Registers for details). DAV stays high when deactivated.
External DAC synchronous load trigger. DACs that have external synchronous load selected are
updated simultaneously by the rising edge of ELDAC.
The resistor connected from analog supply to this pin sets the current output from the pin
PRECISION_I_OUTPUT.
Current output to drive a thermistor.
Output of DAC-0
Output of DAC-1
Output of DAC-2
Output of DAC-3
Analog input signal ground. This pin must connect to the ground of analog input source to minimize
the digital noise.
Analog input channel 0
8