EVAL-INAMP-82RZ Analog Devices Inc, EVAL-INAMP-82RZ Datasheet - Page 5

• Manufacturer Part Number: EVAL-INAMP-82RZ
• Description: AD8221/6/8/9 SO Pkg Eval Bd
• Manufacturer: Analog Devices Inc

Specifications of EVAL-INAMP-82RZ

• Channels Per Ic: 1 - Single
• Amplifier Type: Instrumentation
• Output Type: Single-Ended
• Slew Rate: 2 V/µs
• -3db Bandwidth: 1.5MHz
• Current - Output / Channel: 15mA
• Operating Temperature: -40°C ~ 85°C
• Current - Supply (main Ic): 750µA
• Voltage - Supply, Single/dual (±): 4.6 V ~ 36 V, ±2.3 V ~ 18 V
• Board Type: Fully Populated
• Utilized Ic / Part: AD8220
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

GUARD DRIVERS
When interference from sources such as power lines must be
reduced to levels below those provided by standard shielded
cables, guard drivers may be effective. A guard equalizes the ac
potential between the in-amp input and the cable shield of the
line, effectively reducing the low frequency interference voltage.
A2 in Figure 2 is a dual op amp AD708 driving the shield(s) of
the input cable(s) from the gain resistor pins of the in-amp. The
voltages at these pins are equal to the input voltages plus 0.6 V
(refer to the device data sheet).
The EVAL-INAMP-62RZ provides single and differential guards.
Differential guards drive the shields with essentially the same
signals as the inputs, whereas the single guard can be used for
dual conductor cables. In this mode, the +GUARD drives the
shield at ½(VIN DIFF) + 0.6 V.
To activate the guard drivers, +V
For shielded cables at both inputs, install the W1, W2, W5,
and W8 jumpers.
Using a Single Guard
When using the AD620, AD622, and AD623 for gains greater
than 1, install Resistors R6 and R11 (which are each half the
calculated resistance of R
For a gain of 1, either Position R6 or Position R11 can be shorted
to
enable the guard driver input. Connect the shield to +GUARD.
G
) and Jumpers W1, W2, and W10.
AUX
and −V
AUX
must be connected.
Rev. A | Page 5 of 8
On the header pins that do not bear the ground symbol, insert a
shunt across Position W1.
The guard drivers can be ass
listed in Table 6.
POWER
INPUT
Figure 2. Component Location for the EVAL-INAMP-62
EVAL-INAMP-62RZ/82RZ/82RMZ
embled using the components
OUTPUT