Single-Channel, 128-/64-/32-Position, I2C, 8%
Resistor Tolerance, Nonvolatile Digital Potentiometer
Data Sheet
AD5110/AD5112/AD5114
FEATURES
FUNCTIONAL BLOCK DIAGRAM
V
V
DD
LOGIC
Single-channel, 128-/64-/32-position resolution
5 kΩ, 10 kΩ, 80 kΩ nominal resistance
Maximum 8ꢀ nominal resistor tolerance error
Low wiper resistance
AD5110/AD5112/AD5114
POWER-ON
RESET
A
6 mA maximum wiper current density
Resistor tolerance stored in EEPROM (0.1ꢀ accuracy)
Rheostat mode temperature coefficient: 35 ppm/°C
Potentiometer mode temperature coefficient: 5 ppm/°C
2.3 V to 5.5 V single-supply operation
1.8 V to 5.5 V logic supply operation
W
B
DATA
DATA
EEPROM
SDA
SCL
2
I C
SERIAL
INTERFACE
RDAC
REGISTER
Power-on EEPROM refresh time < 50 μs
I2C-compatible interface
GND
Figure 1.
Wiper setting and EEPROM readback
50-year typical data retention at 125°C
1 million write cycles
Wide operating temperature: −40°C to +125°C
Thin, 2 mm × 2 mm × 0.55 mm 8-lead LFCSP package
APPLICATIONS
Mechanical potentiometer replacement
Portable electronics level adjustment
Audio volume control
Low resolution DAC
LCD panel brightness and contrast control
Programmable voltage to current conversion
Programmable filters, delays, time constants
Feedback resistor programmable power supply
Sensor calibration
GENERAL DESCRIPTION
The AD5110/AD5112/AD5114 provide a nonvolatile solution
for 128-/64-/32-position adjustment applications, offering
guaranteed low resistor tolerance errors of 8% and up to
6 mA current density in the A, B, and W pins. The low resistor
tolerance, low nominal temperature coefficient and high
bandwidth simplify open-loop applications, as well as tolerance
matching applications.
The AD5110/AD5112/AD5114 are available in a 2 mm × 2 mm
LFCSP package. The parts are guaranteed to operate over the
extended industrial temperature range of −40°C to +125°C.
Table 1. 8% Resistance Tolerance Family
Model
Resistance (kΩ)
Position
128
128
64
64
64
Interface
I2C
Up/down
I2C
Up/down
Push-button
I2C
AD5110
AD5111
AD5112
AD5113
AD5116
AD5114
AD5115
10, 80
10, 80
5, 10, 80
5, 10, 80
5, 10, 80
10, 80
The new low wiper resistance feature minimizes the wiper
resistance in the extremes of the resistor array to only 45 Ω,
typical.
The wiper settings are controllable through an I2C-compatible
digital interface that is also used to readback the wiper register
and EEPROM content. Resistor tolerance is stored within
EEPROM, providing an end-to-end tolerance accuracy of 0.1%.
32
32
10, 80
Up/down
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.
Trademarks and registeredtrademarks arethe property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
www.analog.com
©2011 Analog Devices, Inc. All rights reserved.
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