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AD5122ABCPZ100-RL7 Fiches technique(PDF) 1 Page - Analog Devices

No de pièce AD5122ABCPZ100-RL7
Description  The AD5122A/AD5142A are available in a compact, 16-lead, 3 mm 횞 3 mm LFCSP and a 16-lead TSSOP.
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

AD5122ABCPZ100-RL7 Fiches technique(HTML) 1 Page - Analog Devices

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Dual Channel, 128-/256-Position, I2C,
Nonvolatile Digital Potentiometer
Data Sheet
AD5122A/AD5142A
Rev. A
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.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
©2012 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
FEATURES
10 kΩ and 100 kΩ resistance options
Resistor tolerance: 8% maximum
Wiper current: ±6 mA
Low temperature coefficient: 35 ppm/°C
Wide bandwidth: 3 MHz
Fast start-up time < 75 μs
Linear gain setting mode
Single- and dual-supply operation
Independent logic supply: 1.8 V to 5.5 V
Wide operating temperature: −40°C to +125°C
3 mm × 3 mm package option
4 kV ESD protection
APPLICATIONS
Portable electronics level adjustment
LCD panel brightness and contrast controls
Programmable filters, delays, and time constants
Programmable power supplies
FUNCTIONAL BLOCK DIAGRAM
VDD
INDEP
VSS
GND
VLOGIC
7/8
SERIAL
INTERFACE
POWER-ON
RESET
RDAC1
INPUT
REGISTER 1
RDAC2
INPUT
REGISTER 2
EEPROM
MEMORY
A1
W1
B1
A2
W2
B2
AD5122A/
AD5142A
SCL
SDA
RESET
ADDR1
ADDR0
Figure 1.
GENERAL DESCRIPTION
The AD5122A/AD5142A potentiometers provide a nonvolatile
solution for 128-/256-position adjustment applications, offering
guaranteed low resistor tolerance errors of ±8% and up to ±6 mA
current density in the Ax, Bx, and Wx pins.
The low resistor tolerance and low nominal temperature coefficient
simplify open-loop applications as well as applications requiring
tolerance matching.
The linear gain setting mode allows independent programming
of the resistance between the digital potentiometer terminals,
through RAW and RWB the string resistors, allowing very accurate
resistor matching.
The high bandwidth and low total harmonic distortion (THD)
ensure optimal performance for ac signals, making it suitable
for filter design.
The low wiper resistance of only 40 Ω at the ends of the resistor
array allows for pin-to-pin connection.
The wiper values can be set through an I2C-compatible digital
interface that is also used to read back the wiper register and
EEPROM contents.
The AD5122A/AD5142A are available in a compact, 16-lead,
3 mm × 3 mm LFCSP and a 16-lead TSSOP. The parts are
guaranteed to operate over the extended industrial temperature
range of −40°C to +125°C.
Table 1. Family Models
Model
Channel
Position
Interface
Package
AD51231
Quad
128
I2C
LFCSP
AD5124
Quad
128
SPI/I2C
LFCSP
AD5124
Quad
128
SPI
TSSOP
AD51431
Quad
256
I2C
LFCSP
AD5144
Quad
256
SPI/I2C
LFCSP
AD5144
Quad
256
SPI
TSSOP
AD5144A
Quad
256
I2C
TSSOP
AD5122
Dual
128
SPI
LFCSP/TSSOP
AD5122A
Dual
128
I2C
LFCSP/TSSOP
AD5142
Dual
256
SPI
LFCSP/TSSOP
AD5142A
Dual
256
I2C
LFCSP/TSSOP
AD5121
Single
128
SPI/I2C
LFCSP
AD5141
Single
256
SPI/I2C
LFCSP
1 Two potentiometers and two rheostats.


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