AMC7836 Datasheet, PDF (27/88 Pages) Texas Instruments – AMC7836 High-Density, 12-Bit Analog Monitor and Control Solution With Multichannel ADC, Bipolar DACs, Temperature Sensor, and GPIO Ports

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Feature Description (continued)
0
-2
-4
-6
-8
-10
-12
-12.5
-10
-7.5
-5
AV_SS (V)
AMC7836
SLAS986C – NOVEMBER 2014 – REVISED APRIL 2016
-2.5
0
C020
Figure 50. DAC Clamp Output vs AV_SS
A special distinction must be made for DAC group A as the AV_SS pin of this group is the dual-function AV_EE pin.
Aside from setting the clamp voltage and default output range for the DAC group A, the AV_EE pin is also the
lowest potential in the device. As a consequence the AV_EE voltage is dependent on the other AV_SS pin
connections. The AV_EE pin can only be connected to the analog ground if all the other AV_SS pins are also
connected to the analog ground. If any of the AV_SS pins is connected to a negative voltage, the AV_EE pin must
also be connected to that voltage (see Table 1).
The full-scale output range for each DAC group is limited by the corresponding AV_CC and AV_SS values. The
maximum and minimum outputs cannot exceed the AV_CC voltage or be lower than the AV_SS voltage, respectively.
Table 1. Recommended DAC Group Configuration
DAC
GROUP
A
B
C
D
DAC
DAC_A0
DAC_A1
DAC_A2
DAC_A3
DAC_B4
DAC_B5
DAC_B6
DAC_B7
DAC_C8
DAC_C9
DAC_C10
DAC_C11
DAC_D12
DAC_D13
DAC_D14
DAC_D15
AUTO-RANGE
AND CLAMP
VOLTAGE
SELECTION
(AV_SS)
AV_EE
AV_SSB
AV_SSC
AV_SSD
AV_EE = AGND
OUTPUT RANGE
CLAMP VOLTAGE
CONNECTION
AV_EE = V_NEG
OUTPUT RANGE
CLAMP VOLTAGE
CONNECTION
0 to 5 V or 0 to 10 V
0 to 5 V or 0 to 10 V
0 to 5 V or 0 to 10 V
0 to 5 V or 0 to 10 V
AGND
AGND
AGND
AGND
–5 to 0 V or –10 to 0 V
V_NEG
–5 to 0 V or –10 to 0 V V_NEG ≤ AV_SSB ≤ –5 V
0 to 5 V or 0 to 10 V
AGND
–5 to 0 V or –10 to 0 V V_NEG ≤ AV_SSC ≤ –5 V
0 to 5 V or 0 to 10 V
AGND
–5 to 0 V or –10 to 0 V V_NEG ≤ AV_SSD ≤ –5 V
0 to 5 V or 0 to 10 V
AGND
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