EVAL-AD5233SDZ Analog Devices, EVAL-AD5233SDZ Datasheet

EVAL-AD5233SDZ

Manufacturer Part Number

EVAL-AD5233SDZ

Description

Digital Potentiometer Development Tools EVALUATION BOARD

Manufacturer

Analog Devices

Series

AD5233r

Datasheet

1.EVAL-AD5233SDZ.pdf (32 pages)

Specifications of EVAL-AD5233SDZ

Rohs

yes

Product

Evaluation Boards

Tool Is For Evaluation Of

AD5233

Resistance

10 kOhms/50 kOhms/100 kOhms

Operating Supply Voltage

2.7 V

Interface Type

SPI

Maximum Operating Temperature

+ 85 C

Factory Pack Quantity

For Use With

Sim DAC Web Tool

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FEATURES

Nonvolatile memory stores wiper setting

4-channel independent programmable

64-position resolution

Power-on refreshed with EEMEM settings

EEMEM restore time: 140 μs typical

Full monotonic operation

10 kΩ, 50 kΩ, and 100 kΩ terminal resistance

Permanent memory write protection

Wiper setting readback

Predefined linear increment/decrement instructions

Predefined ±6 dB/step log taper increment/decrement

SPI-compatible serial interface with readback function

2.7 V to 5.5 V single supply or ±2.5 V dual supply

11 bytes extra nonvolatile memory for user-defined data

100-year typical data retention, T

APPLICATIONS

Mechanical potentiometer replacement

Instrumentation: gain, offset adjustment

Programmable voltage-to-current conversion

Programmable filters, delays, time constants

Programmable power supply

Sensor calibration

GENERAL DESCRIPTION

The AD5233 is a quad-channel nonvolatile memory,

controlled potentiometer

performs the same electronic adjustment function as a mechanical

potentiometer with enhanced resolution, solid-state reliability,

and remote controllability. The AD5233 has versatile program-

ming using a serial peripheral interface (SPI) for 16 modes of

operation and adjustment, including scratchpad programming,

memory storing and restoring, increment/decrement, ±6 dB/step

log taper adjustment, wiper setting readback, and extra EEMEM

for user-defined information such as memory data for other

components, look-up tables, or system identification

information.

Rev. B

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.

The terms nonvolatile memory and EEMEM are used interchangeably.

The terms digital potentiometer and RDAC are used interchangeably.

instructions

with a 64-step resolution. The device

= 55°C

digitally

64-Position Digital Potentiometer

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

Tel: 781.329.4700

Fax: 781.461.3113

In the scratchpad programming mode, a specific setting can

be programmed directly to the RDAC register, which sets the

resistance between Terminal W to Terminal A and Terminal W

to Terminal B. This setting can be stored into the EEMEM and

is transferred automatically to the RDAC register during system

power-on.

The EEMEM content can be restored dynamically or through

external PR strobing. A WP function protects EEMEM contents.

To simplify the programming, independent or simultaneous

increment or decrement commands can be used to move the

RDAC wiper up or down, one step at a time. For logarithmic

±6 dB step changes in wiper settings, the left or right bit shift

command can be used to double or halve the RDAC wiper

setting.

The AD5233 is available in a thin 24-lead TSSOP package. The

part is guaranteed to operate over the extended industrial

temperature range of −40°C to +85°C.

SDO

GND

CLK

RDY

SDI

Nonvolatile Memory, Quad

USER EEMEM

11 BYTES

DIGITAL 5

OUTPUT

BUFFER

CONTROL

DIGITAL

EEMEM5

SDO

EEMEM

FUNCTIONAL BLOCK DIAGRAM

SDI SERIAL

INTERFACE

DECODE

ADDR

Figure 1.

EEMEM1

EEMEM2

EEMEM3

EEMEM4

RDAC1

RDAC2

RDAC3

RDAC4

AD5233

RDAC4

RDAC1

RDAC2

RDAC3

www.analog.com

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