AD5171BRJZ50-R7 ,64 Position OTP I2C Compatible Digital PotentiometerFEATURES does not change regardless of supply variations or 64-position 1environmental stresses und ..
AD5171BRJZ5-R7 ,64 Position OTP I2C Compatible Digital PotentiometerCHARACTERISTICS RHEOSTAT MODE 2Resistor Differential Nonlinearity R-DNL –0.5 ±0.1 +0.5 LSB RW ..
AD5172BRM100 ,256-Position One-Time Programmable Dual-Channel I2C Digital PotentiometersSpecifications Apply to all VRs) 4Differential Nonlinearity DNL –1.5 ±0.1 +1.5 LSB 4Integral N ..
AD5173BRM50 ,256-Position One-Time Programmable Dual-Channel I2C Digital Potentiometersspecifications represent average readings at 25°C and VDD = 5 V. 2 Resistor position nonlinearity e ..
AD5200BRM10 ,256- (AD5200) and 33-Position (AD5201) Digital PotentiometersGENERAL DESCRIPTION has a nominal temperature coefficient of 500 ppm/°C. The VRThe AD5200 and AD520 ..
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AD8671ARZ-REEL7 , Precision, Very Low Noise, Low Input Bias Current Operational Amplifiers
AD8671ARZ-REEL7 , Precision, Very Low Noise, Low Input Bias Current Operational Amplifiers
AD8672AR ,Precision Very Low Noise Low Input Bias Current Operational AmplifiersCHARACTERISTICS Offset Voltage V 75 μV OS -40°< T < +125°C 175 μV AInput Bias Current I -10 ..
AD8672ARM ,Precision Very Low Noise Low Input Bias Current Operational AmplifiersFEATURES available in 14-lead TSSOP and narrow 14-lead SO Low Noise: 3nV/ÖHz packages. Surface moun ..
AD8672ARMZ-REEL ,Dual Precision Very Low Noise, Low Input Bias Current Operational AmplifierFEATURES PIN CONFIGURATIONS Very low noise: 2.8 nV/√Hz, 77 nV p-p NC 1 8 NC NC 1 8 NCWide bandwidth ..
AD8672ARZ ,Dual Precision Very Low Noise, Low Input Bias Current Operational AmplifierCHARACTERISTICS Offset Voltage VOS 20 75 µV –40°C < T < +125°C 30 125 µV AOffset Voltag ..
AD5171BRJ10-RL7-AD5171BRJ50-RL7-AD5171BRJ5-RL7-AD5171BRJZ100-R7-AD5171BRJZ10-R7-AD5171BRJZ50-R7-AD5171BRJZ5-R7
64 Position OTP I2C Compatible Digital Potentiometer
64-Position OTP Digital PotentiometerRev. A
FEATURES
64-position
OTP (one-time programmable)1 set-and-forget resistance
setting — low cost alternative over EEMEM
Unlimited adjustments prior to OTP activation
5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ end-to-end resistance
Low tempco 5 ppm/oC in potentiometer mode
Low tempco 35 ppm/°C in rheostat mode
Compact standard SOT-23-8 package
Low power, IDD = 10 µA max
Fast settling time, ts = 5 µs typ in power-up 2C® compatible digital interface
Computer software replaces µC in factory programming
applications
Full read/write of wiper register
Extra I2C device address pin
Power-on preset to midscale
5.5 V one-time programming voltage
Low operating voltage, 2.7 V to 5.5 V
OTP validation check function
Automotive temperature range −40°C to +125°C
APPLICATIONS
Systems calibrations
Electronics level settings
Mechanical Trimmers® and potentiometer replacements
Automotive electronics adjustments
Gain control and offset adjustments
Transducer circuits adjustments
Programmable filters up to 1.5 MHz BW
GENERAL DESCRIPTION The AD5171 is a 64-position, one-time programmable (OTP)
digital potentiometer2 that uses fuse link technology to achieve
the memory retention of the resistance setting function. OTP is
a cost-effective alternative over the EEMEM approach for users
who do not need to reprogram new memory settings in the
digital potentiometer. This device performs the same electronic
adjustment function as most mechanical trimmers and variable
resistors. The AD5171 is programmed using a 2-wire I2C
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 freezing the wiper position at a
given setting (analogous to placing epoxy on a mechanical
trimmer). When this permanent setting is achieved, the value
does 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 the AD5171 in factories, Analog
Devices offers device programming software that operates
across Windows® 95 to XP platforms, including Windows NT.
This software application effectively replaces the need for exter-
nal I2C controllers or host processors and therefore significantly
reduces users’ development time.
An AD5171 evaluation kit is available, which includes the soft-
ware, connector, and cable that can be converted for factory
programming applications.
The AD5171 is available in a compact SOT-23-8 package. All
parts are guaranteed to operate over the automotive tempera-
ture range of −40°C to +125°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.
GND
VDD
AD0
SDA
SCL
03437-0-001 Figure 1. Functional Block Diagram
VDD
GND
SCL
AD0
SDA
002Figure 2. Pin Configuration One-time programmable (OTP)—unlimited adjustments before permanent
setting. The terms digital potentiometer and RDAC are used interchangeably.
TABLE OF CONTENTS Electrical Characteristics.................................................................3
Absolute Maximum Ratings............................................................5
ESD Caution..................................................................................5
Pin Configuration and Functional Descriptions..........................6
Typical Performance Characteristics.............................................7
Theory of Operation......................................................................11
One-Time Programming (OTP)..............................................11
Power Supply Considerations...................................................11
ESD Protection...........................................................................12
Terminal Voltage Operating Range..........................................12
Power-Up/Power-Down Sequences.........................................12
Determining the Variable Resistance and Voltage................13
Rheostat Mode Operation.........................................................13
Potentiometer Mode Operation...............................................13
Controlling the AD5171............................................................14
Software Programming.............................................................14 2C Controller Programming....................................................16 2C Compatible 2-Wire Serial Bus...........................................17
Controlling Two Devices on One Bus.....................................17
Applications.....................................................................................18
DAC..............................................................................................18
Gain Control Compensation....................................................18
Programmable Voltage Source with Boosted Output...........18
Level Shifting for Different Voltage Operation......................18
Resistance Scaling......................................................................18
Resolution Enhancement..........................................................19
RDAC Circuit Simulation Model.............................................19
AD5171 Evaluation Board........................................................20
Outline Dimensions.......................................................................21
Ordering Guide..........................................................................21
REVISION HISTORY
11/04—Changed Data Sheet from Rev. 0 to Rev. A Changes to Specifications................................................................3
Changes to Table 3............................................................................7
Changes to One-Time Programming section.............................11
Changes to Power Supply Consideration section.......................11
Changes to Figure 26 and Figure 27.............................................12
1/04—Revision 0: Initial Version ELECTRICAL CHARACTERISTICS 5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ versions; VDD = 3 V to 5 V ± 10%, VA = VDD, VB = 0 V, −40°C < TA < +125°C, unless otherwise noted.
Table 1.
1 Typical specifications represent average readings at 25°C and VDD = 5 V. Resistor position nonlinearity error R-INL is the deviation from an ideal value measured between the maximum resistance and the minimum resistance wiper
positions. R-DNL measures the relative step change from ideal between successive tap positions. Parts are guaranteed monotonic.
3 VAB = VDD, Wiper (VW) = no connect. INL and DNL are measured at VW with the RDAC configured as a potentiometer divider similar to a voltage output DAC. VA = VDD and VB = 0 V. DNL specification limits
of ±1 LSB maximum are guaranteed monotonic operating conditions. Resistor terminals A, B, W have no limitations on polarity with respect to each other.
6 Guaranteed by design and not subject to production test. Different from operating power supply, power supply for OTP is used one-time only.
8 Different from operating current, supply current for OTP lasts approximately 400 ms for one-time needed only. PDISS is calculated from (IDD × VDD). CMOS logic level inputs result in minimum power dissipation.
10 Bandwidth, noise, and settling time are dependent on the terminal resistance value chosen. The lowest R value results in the fastest settling time and highest
bandwidth. The highest R value results in the minimum overall power consumption.
11 All dynamic characteristics use VDD = 5 V. Different from settling time after fuse is blown. The OTP settling time occurs only once.
t9
t10
ABSOLUTE MAXIMUM RATINGS
Table 2. Maximum terminal current is bounded by the maximum applied voltage
across any two of the A, B, and W terminals at a given resistance, the
maximum current handling of the switches, and the maximum power
dissipation of the package. VDD = 5 V.
2 Package power dissipation = (TJ max – TA)/θJA.
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or
any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
