AD8231-EVALZ Analog Devices Inc, AD8231-EVALZ Datasheet

AD8231-EVALZ

Manufacturer Part Number

AD8231-EVALZ

Description

BOARD EVAL FOR AD8231

Manufacturer

Analog Devices Inc

Datasheets

1.AD8231-EVALZ.pdf (24 pages)

2.AD8231-EVALZ.pdf (2 pages)

Specifications of AD8231-EVALZ

Channels Per Ic

2 - Dual

Amplifier Type

Instrumentation

Output Type

Single-Ended

Slew Rate

1.1 V/µs

Current - Output / Channel

70mA

Operating Temperature

-40°C ~ 125°C

Current - Supply (main Ic)

4mA

Voltage - Supply, Single/dual (±)

3 V ~ 6 V, ±1.5 V ~ 3 V

Board Type

Fully Populated

Utilized Ic / Part

AD8231

Silicon Manufacturer

Analog Devices

Application Sub Type

Instrumentation Amplifier

Kit Application Type

Amplifier

Silicon Core Number

AD8231

Kit Contents

Board

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

-3db Bandwidth

Lead Free Status / RoHS Status

Lead free / RoHS Compliant, Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

AD8231-EVALZ

Manufacturer:

Analog Devices Inc

Quantity:

135

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Download datasheet (152Kb)

FEATURES

Two AD8231 circuits

Easy to switch jumpers

Decoupled supply lines

GENERAL DESCRIPTION

The AD8231-EVALZ has two AD8231s mounted on it. Z1 is the

AD8231 on the left side of the board. It is configured to allow

access of the in-amp and op amp separately. Z2 is the AD8231

on the right side of the board. It is set up as a differential output

configuration.

Inputs, outputs, references, and the supplies are routed to test

points for easy connectivity. SDN , CS , and the gain select pins

(A0 to A2) are routed to jumpers. These jumpers control both

AD8231s. When a jumper is in the high position, its corresponding

pin is connected to VS. When the jumper is in the low position,

it is connected to ground.

The PCB has four layers. The top and bottom layers are used for

routing, and the two internal layers are power and ground planes.

Rev. 0

Evaluation boards are only intended for device evaluation and not for production purposes.

Evaluation boards are supplied “as is” and without warranties of any kind, express, implied, or

statutory including, but not limited to, any implied warranty of merchantability or fitness for a

particular purpose. No license is granted by implication or otherwise under any patents or other

intellectual property by application or use of evaluation boards. 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. Analog Devices reserves the right to change devices or specifications at any time

without notice. Trademarks and registered trademarks are the property of their respective owners.

Evaluation boards are not authorized to be used in life support devices or systems.

In-amp and op amp

Differential output

EVALUATION BOARD

Figure 1.

Instrumentation Amplifier Evaluation Board

Zero Drift, Digitally Programmable

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

QUICK START

Set the jumpers as shown in Table 1. These jumper settings ensure

the part is enabled and in a gain of 1.

Table 1. Quick Start Jumper Settings

Function

SDN

Connect the ground lead to GND and connect a 5 V supply to

+INA. 3.5 V should now appear at OUTA.

The output equation for the AD8231 with a gain of 1 is

has the in-amp reference pin driven to half the supply voltage.

Therefore, the output voltage is 2 V – 1 V + 2.5 V = 3.5 V.

DUAL SUPPLIES

The supplies on the AD8231-EVALZ are labeled VS and GND

because most applications are single supply. However, dual

supplies can also be used with this evaluation board, as long as

the difference between the two supplies is less than 6 V. Simply

connect the negative supply to the GND terminal. For example,

connect +2.5 V to +V

to GND also appears at the GND1, GND2, and GND3 terminals;

therefore, take care when connecting external equipment.

CONFIGURING THE OP AMP

By default, the op amp in Z1 is configured as a unity-gain buffer

driving the in-amp reference pin. A resistor divider at the op amp

input sets the voltage at midsupply. When using this op amp for

other applications, remove R8 and drive the in-amp REF pin

with a different source.

+INA

Connect a 1 V source to –INA, and connect a 2 V source to

− V

−INA

OP_IN

+ V

Figure 2. Default Op Amp Configuration

REF

R10

0Ω

= V

and −2.5 V to GND. Any voltage connected

10kΩ

OUT

R13

RC11

10kΩ

0Ω

. As shipped, the evaluation board

AD8231-EVALZ

Setting

High

Low

R12

0Ω

www.analog.com

OP_OUT

REF

Related parts for AD8231-EVALZ

AD8231-EVALZ Summary of contents

Page 1

... Differential output Easy to switch jumpers Decoupled supply lines GENERAL DESCRIPTION The AD8231-EVALZ has two AD8231s mounted on it the AD8231 on the left side of the board configured to allow access of the in-amp and op amp separately the AD8231 on the right side of the board set differential output configuration ...

Page 2

... R4 0Ω 9 REF R8 0Ω C10 SPARE C12 R12 SPARE 0Ω R9 SPARE Figure 3. AD8231-EVALZ Schematic The op amp can also be configured for filtering. Figure 5 shows how to make a Sallen-Key filter. OP_OUT ORDERING GUIDE Model AD8231-EVALZ RoHS Compliant Part. ESD CAUTION Rev Page LOGIC ...

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