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AD5171EVAL Datasheet

  • AD5171EVAL

  • 64-Position OTP Digital Potentiometer

  • 20頁

  • AD

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Preliminary Technical Data
FEATURES
64-Position OTP Digital Potentiometer
AD5171
a mechanical trimmer). When this permanent setting is
achieved, the value will not change regardless of supply
variations or environmental stresses under normal operating
conditions. To verify the success of permanent programming,
Analog Devices patterned the OTP validation such that the fuse
status can be discerned from two validation bits in read mode.
For applications that program AD5171 in the factories, Analog
Devices offers a device programming software, which operates
across Windows廬 95 to XP廬 platforms including Windows NT廬.
This software application effectively replaces the need for
external I
2
C controllers or host processors and therefore
significantly reduces users鈥?development time.
An AD5171 evaluation kit is available, which includes the
software, connector, and cable that can be converted for the
factory programming applications.
The AD5171 is available in a compact SOT-23-8 package. All
parts are guaranteed to operate over the automotive
temperature range of 鈭?0擄C to +125擄C. Besides its unique OTP
feature, the AD5171 lends itself well to other general-purpose
digital potentiometer applications due to its temperature
performance, small form factor, and low cost.
SCL
SDA
AND
CONTROL LOGIC
I
2
C INTERFACE
A
64 positions
OTP (one-time programmable)
1
set-and-forget resistance
setting鈥攍ow cost alternative over EEMEM
Unlimited adjustments prior to OTP activation
5 k鈩? 10 k鈩? 50 k鈩? 100 k鈩?end-to-end resistance
Low tempco 5 ppm/
o
C in potentiometer mode
Low tempco 35 ppm/擄C in rheostat mode
Compact standard SOT-23-8 package
Low power, I
DD
= 8 碌A(chǔ) max
Fast settling time, t
s
= 5 碌s typ in power-up
I
2
C compatible digital interface
Computer software replaces 碌c in factory programming
applications
Full read/write of wiper register
Extra I
2
C device address pin
Power-on preset to midscale
6 V one-time programming voltage
Low operating voltage, 2.7 V to 5.5 V
OTP validation check function
Automotive temperature range 鈭?0擄C to +125擄C
APPLICATIONS
Systems calibrations
Electronics level settings
Mechanical potentiometers and trimmers廬 replacements
Automotive electronics adjustments
Gain control and offset adjustments
Transducer circuits adjustments
Programmable filters up to 1.5 MHz BW
W
AD0
B
GENERAL DESCRIPTION
The AD5171 is a 64-position, one-time programmable (OTP)
digital potentiometer
2
, which employs fuse link technology to
achieve the memory retention of resistance setting function.
OTP is a cost-effective alternative over the EEMEM approach
for users who do not need to reprogram new memory setting in
the digital potentiometer. This device performs the same
electronic adjustment function like most mechanical trimmers
and variable resistors do. The AD5171 is programmed using a
2-wire I
2
C compatible digital control. It allows unlimited
adjustments before permanently setting the resistance value.
During the OTP activation, a permanent fuse blown command
is sent after the final value is determined; therefore freezing the
wiper position at a given setting (analogous to placing epoxy on
Rev. PrC
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.
V
DD
GND
FUSE
LINK
WIPER
REGISTER
03437-0-001
AD5171
Figure 1. Functional Block Diagram
W
1
V
DD 2
GND
3
8
A
B
03437-0-002
AD5171
7
TOP VIEW
6
AD0
(Not to Scale)
5
SDA
SCL
4
Figure 2. Pin Configuration
1
One-time programmable (OTP) - Unlimited adjustments before permanent
setting.
2
The terms digital potentiometer and RDAC are used interchangeably.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703
漏 2003 Analog Devices, Inc. All rights reserved.

AD5171EVAL 產(chǎn)品屬性

  • 1

  • 編程器，開發(fā)系統(tǒng)

  • 評(píng)估演示板和套件

  • -

  • 數(shù)字電位器

  • -

  • AD5171

  • -

  • -

  • 板

  • AD5171BRJZ5-R2DKR-ND - IC DGTL POT OTP 5K 12C SOT23-8AD5171BRJZ50-R2DKR-ND - IC DGTL POT OTP 50K I2C SOT23-8AD5171BRJZ10-R2DKR-ND - IC DGTL POT OTP 10K I2C SOT23-8AD5171BRJZ100R2DKR-ND - IC DGTL POT OTP 100K I2C SOT23-8AD5171BRJZ5-R7-ND - IC DGTL POT OTP 5K SOT23-8AD5171BRJZ50-R7-ND - IC DGTL POT OTP 50K SOT23-8AD5171BRJZ100-R7-ND - IC DGTL POT OTP 100K SOT23-8AD5171BRJZ10-R7-ND - IC DGTL POT OTP 10K SOT23-8AD5171BRJZ50-R2CT-ND - IC DGTL POT OTP 50K I2C SOT23-8AD5171BRJZ5-R2CT-ND - IC DGTL POT OTP 5K 12C SOT23-8更多...

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