AD5273BRJZ1-R2 View Datasheet(PDF) - Analog Devices
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Description
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AD5273BRJZ1-R2 Datasheet PDF : 20 Pages
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Data Sheet
64-Position OTP Digital Potentiometer
AD5273
FEATURES
64 positions
One-time programmable (OTP)1 set-and-forget
Resistance setting—low cost alternative over EEMEM
Unlimited adjustments prior to OTP activation
1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ end-to-end terminal resistance
Compact 8-lead SOT-23 standard package
Ultralow power: IDD = 5 µA maximum
Fast settling time: tS = 5 µs typical during power-up
I2C-compatible digital interface
Computer software2 replaces microcontroller in
factory programming applications
Wide temperature range: −40°C to +105°C
Low operating voltage: 2.7 V to 5.5 V
OTP validation check function
APPLICATIONS
System calibrations
Electronics level settings
Mechanical potentiometers and trimmer replacement
Transducer circuit adjustments
Programmable filters up to 6 MHz BW3
GENERAL DESCRIPTION
The AD5273 is a 64-position, one-time programmable (OTP)
digital potentiometer4 that employs fuse link technology to
achieve permanent program setting. This device performs the
same electronic adjustment function as most mechanical
trimmers and variable resistors. It allows unlimited adjustments
before permanently setting the resistance values. The AD5273 is
programmed using a 2-wire, I2C-compatible digital control.
During write mode, a fuse blow command is executed after the
final value is determined, thereby freezing the wiper position at
a given setting (analogous to placing epoxy on a mechanical
trimmer). When the permanent setting is achieved, the value
does not change, regardless of the supply variations or environ-
mental stresses under normal operating conditions. To verify
the success of permanent programming, Analog Devices, Inc.,
patterned the OTP validation such that the fuse status can be
discerned from two validation bits in the read mode.
FUNCTIONAL BLOCK DIAGRAM
SCL
A
SDA
I2C INTERFACE
AND
CONTROL LOGIC
W
AD0
AD5273
B
VDD
GND
FUSE
LINK
WIPER
REGISTER
Figure 1.
In addition, for applications that program the AD5273 at the
factory, Analog Devices offers device programming software2
running on Windows NT®, Windows® 2000, and Windows XP
operating systems. This software application effectively replaces
any external I2C controllers, which in turn enhances the user
system’s time-to-market.
The AD5273 is available in 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ
resistances and in a compact 8-lead SOT-23 standard package.
It operates from −40°C to +105°C.
Along with its unique OTP feature, the AD5273 lends itself
well to general digital potentiometer applications due to its
effective resolution, array resistance options, small footprint,
and low cost.
An AD5273 evaluation kit and software are available. The kit
includes the connector and cable that can be converted for
factory programming applications.
For applications that require dynamic adjustment of resistance
settings with nonvolatile EEMEM, refer to the AD5231, AD5232,
AD5233, and AD5235 family, and the AD5251, AD5252, AD5254,
AD5258, and AD5259 family of nonvolatile memory digital
potentiometers.
Rev. J
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Trademarks and registered trademarks are the property of their respective owners.
1 OTP allows unlimited adjustments before permanent setting.
2 Analog Devices cannot guarantee the software to be 100% compatible to all
systems due to the wide variation in computer configurations.
3 Applies to 1 kΩ parts only.
4 The terms digital potentiometer, VR, and RDAC are used interchangeably.
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