EVAL-INAMP-62RZ/82RZ/82RMZ
USER OPTIONS
Table 4. Jumpers
Jumper
W1
W2
W3
W4
W5
W6
W7
W8
W9
W10
W11
W12
W13
W14
W15
Function
+GUARD select
?GUARD select
+Input coupling
?Input coupling
Guard driver ?IN
?V S to ? V AUX
+V S to + V AUX
Guard driver +IN
Guard driver +IN
Guard driver +IN
Reference input
Reference input
Reference input
In-amp ?V S source
Guard driver ?IN
Description
Allows the shield of the positive input cable to be connected to the guard driver or ground.
Allows the shield of the negative input cable to be connected to the guard driver or ground.
Installed; the positive input is dc-coupled.
Installed; the negative input is dc-coupled.
Connects the negative shield guard driver to Pin 1 of the in-amp.
Connects the negative supply voltage to the negative auxiliary voltage of the same value.
Connects the positive supply voltage to the positive auxiliary voltage of the same value.
Connects the positive shield guard driver to Pin 8 of the in-amp.
Connects the positive shield guard driver to ground.
Selects the single-shield guard driver.
Connects the reference of the in-amp to the offset-adjustable voltage reference.
Connects the reference of the in-amp to ground.
Connects the reference of the in-amp to an external reference supply.
Connects the in-amp ?V S pin to GND or to ?V S of the evaluation board.
Connects the negative shield guard driver to ground.
Status
Not installed
Not installed
Installed
Installed
Not installed
Not installed
Not installed
Not installed
Not installed
Not installed
Not installed
Installed
Not installed
Connected to ?V S
Not installed
Table 5. Input/Output
I/O
+V S /?V S
GND
+IN/?IN
+GUARD/?GUARD
EXT_REF
OUTPUT
+V AUX /?V AUX
Function
Positive and negative rails of the in-amp.
Ground for the board. GND1, GND2, GND3, and GND4 designate pins.
Positive and negative inputs of the in-amp.
Positive and negative terminals for use with a shielded cable.
External reference input for the in-amp.
Output of the in-amp.
Auxiliary power rails for guard drivers and offset reference circuitry.
Table 6. User-Supplied Parts for Guard and Offset Circuits
Reference Designation
Guard Drivers
C5, C6
A2
Offset Regulators
C7 to C10
A1
CS1, CS2
R9, R10
Part
0.1 μF, 25 V ceramic capacitor
AD708JN dual precision op amp
0.1 μF, 25 V ceramic capacitor
OP177 precision op amp
J500 240 μA current source
5.9 kΩ, 1% metal film resistor
Rev. A | Page 6 of 8
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