AMC7812B_15 Datasheet, PDF (9/92 Pages) Texas Instruments – 12-Bit Analog Monitoring and Control Solution with Multichannel ADC, DACs, and Temperature Sensors

AMC7812B
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NAME
A2
ADC-GND
ADC-REF-IN/CMP
AGND1
AGND2
AGND3
AGND4
ALARM
AV_CC1
AV_CC2
AV_DD1
AV_DD2
CH0 to CH15
CNVT
CS/A0
D1–/GPIO4
D1+/GPIO-5
D2–/GPIO-6
D2+/GPIO-7
DAC0-OUT
DAC1-OUT
DAC2-OUT
DAC3-OUT
DAC4-OUT
DAC5-OUT
DAC6-OUT
DAC7-OUT
DAC8-OUT
DAC9-OUT
DAC10-OUT
DAC11-OUT
DAC-CLR-0
DAC-CLR-1
DAV
DGND
DGND2
DV_DD
GPIO-0
GPIO-1
GPIO-2
GPIO-3
NO.
11
32
31
54
55
22
21
62
56
23
49
50
33-48
3
9
29
30
27
28
26
25
24
20
19
18
51
52
53
59
60
61
17
63
2
6
64
8
13
14
15
16
SBAS625A – SEPTEMBER 2013 – REVISED SEPTEMBER 2013
PIN DESCRIPTIONS
DESCRIPTION
Slave address selection A2 for I²C when the SPI/I2C pin is low.
ADC ground. Must be connected to AGND.
External ADC reference input when external V_REF is used to drive the ADC. A compensation capacitor connection
(connect a 4.7-µF capacitor between this pin and AGND) when internal V_REF is used to drive the ADC.
Analog ground
Analog ground
Analog ground
Analog ground
Global alarm. Open-drain output. An external 10-kΩ, pull-up resistor is required. This pin goes low (active) when one
(or more) analog channels are out of range.
Positive analog power for DAC6-OUT, DAC7-OUT, DAC8-OUT, DAC9-OUT, DAC10-OUT, and DAC11-OUT, must be tied
to AV_CC2
Positive analog power for DAC0-OUT, DAC1-OUT, DAC2-OUT, DAC3-OUT, DAC4-OUT, and DAC5-OUT, must be tied to
AV_CC1
Positive analog power supply
Positive analog power supply
Analog inputs of channel 0 to 15. CH4 to CH15 are single-ended. CH0, CH1, CH2, and CH3 can be programmed as
differential or single-ended.
External conversion trigger, active low. The falling edge initiates the sampling and conversion of the ADC.
Chip-select signal for SPI when the SPI/I2C pin is high. Slave address selection A0 for I²C when the SPI/I2C pin is low.
Remote sensor D1 negative input when D1 is enabled; GPIO-6 when D1 is disabled. Pull-up resistor required for output.
Remote sensor D1 positive input when D1 is enabled; GPIO-7 when D1 is disabled. Pull-up resistor required for output.
Remote sensor D2 negative input when D2 is enabled; GPIO-6 when D2 is disabled. Pull-up resistor required for output.
Remote sensor D2 positive input when D2 is enabled; GPIO-7 when D2 is disabled. Pull-up resistor required for output.
DAC channel 0 output
DAC channel 1 output
DAC channel 2 output
DAC channel 3 output
DAC channel 4 output
DAC channel 5 output
DAC channel 6 output
DAC channel 7 output
DAC channel 8 output
DAC channel 9 output
DAC channel 10 output
DAC channel 11 output
DAC clear control signal, digital input, active low. When low, all DACs associated with the DAC-CLR-0 pin enter a clear
state, the DAC latch is loaded with a predefined code, and the output is set to the corresponding level. However, the DAC-
data register does not change. When the DAC goes back to normal operation, the DAC latch is loaded with the previous
data from the DAC-data register and the output returns to the previous level, regardless of the status of the SLDAC-n bit.
When this pin is high, the DACs are in normal operation.
DAC clear control signal, digital input, active low. When low, all DACs associated with the DAC-CLR-1 pin enter a clear
state, the DAC latch is loaded with a predefined code, and the output is set to the corresponding level. However, the DAC-
data register does not change. When the DAC goes back to normal operation, the DAC latch is loaded with the previous
data from the DAC-data register and the output returns to the previous level, regardless of the status of the SLDAC-n bit.
When this pin is high, the DACs are in normal operation.
Data available indicator, active low output. In direct mode, the DAV pin goes low (active) when the conversion ends. In
auto mode, a 1-µs pulse (active low) appears on this pin when a conversion cycle completes (see the Primary ADC
Operation and Registers sections for details). DAV stays high when deactivated.
Digital ground
Digital ground
Digital power supply (+3 V to +5 V). Must be the same value as AV_DD.
General-purpose digital inputs and outputs. These pins are bidirectional open-drain, digital input and output pins, and
require an external pull-up resistor. See the General Purpose Input/Output Pins section for more details.
Copyright © 2013, Texas Instruments Incorporated
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