Amc7812Evm Schematic (2 Of 3) - Texas Instruments AMC7812EVM-PDK User Manual

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Onboard ADC Filter and Buffer
Note: If onboard buffers are not used,
jumpers should be installed
on J7-5,6 and J7-7,8.
J7
2 1
4 3
6 5
8 7
AGND
10 9
ADCREF
12 11
DACREF
AGND
AGND
SBAU177D – September 2010 – Revised August 2014
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C53 NI
R72 0
R73 0
C55 NI C56
C57
NI
R74 0 NI
AVDD/DVDD
C58
R75
AGND
NI
0.1 F
AGND
2
R77
1
V+
A ADC2
3 V-
17.4
U8A C60
OPA2320AIDGK
2700pF
AGND AGND
C62 NI
R78
R79 0
NI
6
R80
7
V+
ADC3
B
5 V-
17.4
C63
U8B 2700pF
OPA2320AIDGK
AGND
Figure 35. AMC7812EVM Schematic (2 of 3)
Copyright © 2010–2014, Texas Instruments Incorporated
Onboard Temperature Diode Selection
IOVDD
ADC0
ADC1
MMBT3904
1
Q1
14
2
IOVDD
13
4
R76
20.0k
5
9
6
10
JP6
DIODE SELECT
12
1 2
GND
MMBT3906
1
Q2
AMC7812EVM Documentation
Jumper Table:
- JP6 (DIODE SELECT): Remote temperature diode selection.
Installed shunt selects external temperature diodes connected to J2-1,2 and J3-1,2
Uninstalled shunt selects onboard temperature diodes Q1 and Q2
C54 0.1 F
GND
U7
V+
1
COM1 NO1
C59
IN1
270pF
3
COM2 NO2
IN2
8
COM3 NO3
C61
IN3
270pF
11
COM4 NO4
IN4
7
GND
TS12A44514PW
GND
AMC7812EVM-PDK User's Guide
AMC D2-
AMC D2+
AMC D1-
AMC D1+
23