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AD5175 Datasheet
Digital Rheostat with I2C Interface and 50-TP Memory
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Single-Channel, 1024-Position, Digital Rheostat
with I2C Interface and 50-TP Memory
AD5175
FEATURES
Single-channel, 1024-position resolution
10 kΩ nominal resistance
50-times programmable (50-TP) wiper memory
Rheostat mode temperature coefficient: 35 ppm/°C
2.7 V to 5.5 V single-supply operation
±2.5 V to ±2.75 V dual-supply operation for ac or bipolar
operations
I2C-compatible interface
Wiper setting and memory readback
Power on refreshed from memory
Resistor tolerance stored in memory
Thin LFCSP, 10-lead, 3 mm × 3 mm × 0.8 mm package
Compact MSOP, 10-lead 3 mm × 4.9 mm × 1.1 mm package
APPLICATIONS
Mechanical rheostat replacements
Op-amp: variable gain control
Instrumentation: gain, offset adjustment
Programmable voltage to current conversions
Programmable filters, delays, time constants
Programmable power supply
Sensor calibration
FUNCTIONAL BLOCK DIAGRAM
VDD
POWER-ON
RESET
AD5175
SCL
SDA
ADDR
RESET
I2C
SERIAL
INTERFACE
RDAC
REGISTER
10
50-TP
MEMORY
BLOCK
A
W
VSS EXT_CAP
Figure 1.
GND
GENERAL DESCRIPTION
The AD5175 is a single-channel, 1024-position digital rheostat
that combines industry leading variable resistor performance
with nonvolatile memory (NVM) in a compact package.
This device supports both dual-supply operation at ±2.5 V to
±2.75 V and single-supply operation at 2.7 V to 5.5 V, and offers
50-times programmable (50-TP) memory.
The AD5175 device wiper settings are controllable through the
I2C–compatible digital interface. Unlimited adjustments are
allowed before programming the resistance value into the
50-TP memory. The AD5175 does not require any external
voltage supply to facilitate fuse blow and there are 50 oppor-
tunities for permanent programming. During 50-TP activation,
a permanent blow fuse command freezes the resistance position
(analogous to placing epoxy on a mechanical rheostat).
The AD5175 is available in a 3 mm × 3mm 10-lead LFCSP
package and in a 10-lead MSOP package. The part is guaranteed
to operate over the extended industrial temperature range of
−40°C to +125°C.
Rev. 0
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2010 Analog Devices, Inc. All rights reserved.

AD5175 Datasheet PDF



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