AD8222-EVALZ Analog Devices Inc, AD8222-EVALZ Datasheet
AD8222-EVALZ
Manufacturer Part Number
AD8222-EVALZ
Description
AD8222 EVALUATION BOARD
Manufacturer
Analog Devices Inc
Datasheet
1.AD8222-EVALZ.pdf
(2 pages)
Specifications of AD8222-EVALZ
Lead Free Status / Rohs Status
Compliant
FEATURES
Two AD8222 circuits
Easy to connect screw terminals
Decoupled supply lines
Pads for RFI filtering
GENERAL DESCRIPTION
The AD8222-EVALZ has two AD8222 instrumentation
amplifier circuits: one circuit is configured for dual-channel
operation, while the other is configured for single-channel,
differential output operation. Inputs, outputs, references, and
the supplies are routed to screw terminals for easy connectivity.
The PCB board has four layers. The top and bottom layers are
used for routing, and the two internal layers are ground planes.
The ground plane was removed underneath the R
This is a precaution against any capacitance mismatch at the
two R
JUMPER SETTINGS
Table 1.
Jumpers
J1A, J1B, J11
J2A, J2B, J12, J13
In the default factory setting, the reference pins of the AD8222
are connected to GND through J2A, J2B, J12, and J13.
Therefore, in the shipping configuration, W2A:REF1,
W2B:REF2, W13:REF2, and W13:+IN2 are connected to GND.
To disconnect the terminal from GND, remove the
corresponding jumper.
QUICK START
The quick start feature assumes that the jumpers are in their
factory default positions.
To begin:
• Connect ground lead to GND.
• Connect a 15 V supply to +V
• Connect a −15 V supply to −Vs.
• Ground −IN1.
• Connect a 1V p-p, 1 kHz source signal to +IN1. A replica of
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
Dual channel
Differential out
the signal should now appear at OUT1.
G
pins, which may affect ac CMRR.
Purpose
Connect inputs together
Connect reference pins to
ground
S
.
G
Default
Unconnected
Connected
resistors.
Precision Instrumentation Amplifier
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
SETTING THE GAIN
The gain setting resistors are R1A and R1B for the dual-channel
part and R11A for the differential output part. The pads are
sized for 0603-sized resistors, although 0402 and 0805 sizes can
also be used.
EMI FILTERING
The board comes with 0603 component pads for an EMI filter.
These components are shown in Table 2.
Table 2.
Channel
Dual Channel A
Dual Channel B
Differential Output Channel
The board, as shipped, does not contain EMI filtering. The
resistors pads are populated with 0 Ω resistors, and the
capacitors are not populated.
See the
filtering.
AD8222
Figure 1. AD8222-EVALZ Evaluation Board Photo
data sheet for more information on EMI
©2006 Analog Devices, Inc. All rights reserved.
Evaluation Board
AD8222-EVALZ
Components
R3A, R2A, C1A, C2A, C3A
R3B, R2B, C1B, C2B, C3B
R13, R12, C11, C12, C13
www.analog.com
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AD8222-EVALZ Summary of contents
Page 1
... Easy to connect screw terminals Decoupled supply lines Pads for RFI filtering GENERAL DESCRIPTION The AD8222-EVALZ has two AD8222 instrumentation amplifier circuits: one circuit is configured for dual-channel operation, while the other is configured for single-channel, differential output operation. Inputs, outputs, references, and the supplies are routed to screw terminals for easy connectivity. ...
Page 2
... C11 15 SPARE 16 R13 AD8222 0Ω 1 DIFF OUT C12 2 SPARE R11A 3 SPARE R12 4 0Ω C13 SPARE Figure 2. AD8222-EVALZ Evaluation Board Schematic ORDERING GUIDE Model AD8222-EVALZ Pb-free part. Rev Page W2B –V C1B SPARE 13 R2B 0Ω C2B R1B J1B SPARE 10 SPARE R3B 0Ω ...