Evaluation Board for the 8-Channel,

EVAL-AD7997EBZ/AD7998EBZ

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

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FEATURES

Full-featured evaluation board for the AD7997/AD7998

PC software for control and measurement of the

AD7997/AD7998

USB interface (cable provided)

Various linking options

GENERAL DESCRIPTION

This data sheet describes the evaluation board for testing the

AD7997/AD7998 devices. These devices are 10-/12-bit, low

power, successive approximation analog-to-digital converters

from a single 2.7 V to 5.5 V power supply and features a 2 μs

conver-sion time.

The AD7997/AD7998 contain an 8-channel multiplexer and

track-and-hold amplifier that can handle input frequencies of up

to 11 MHz.

Full details on these devices are provided in the AD7997/

AD7998 data sheet available from Analog Devices, Inc., which

should be consulted in conjunction with this data sheet.

On-board components for the EVAL-AD7997/AD7998 include

two AD5245 digital potentiometers, eight AD8691 operational

amplifiers, one AD780 (a pin programmable 2.5 V or 3 V ultra-

high precision band gap reference), and one TMP37 precision

temperature sensor.

The available link options are described in Table 2 and Table 3.

FUNCTIONAL BLOCK DIAGRAM

TMP37

POT2

AN3

POT1

AN0

POT2

AN1

POT1

AN2

POT1

AN4

POT2

AN5

POT1

AN6

POT2

AN7

SDA

SCL

AD780

AD7997/AD7998

SDA

SCL

CYPRESS

USB

USB

J1

EVAL-AD7997EBZ/AD7998EBZ

J3

J2

Figure 1.