AD5171BRJZ5-R2 Analog Devices Inc, AD5171BRJZ5-R2 Datasheet

IC DGTL POT OTP 5K I2C SOT23-8

AD5171BRJZ5-R2

Manufacturer Part Number
AD5171BRJZ5-R2
Description
IC DGTL POT OTP 5K I2C SOT23-8
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD5171BRJZ5-R2

Memory Type
Non-Volatile
Temperature Coefficient
35 ppm/°C Typical
Taps
64
Resistance (ohms)
5K
Number Of Circuits
1
Interface
I²C, 2-Wire Serial
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SOT-23-8
Resistance In Ohms
5K
End To End Resistance
5kohm
Resistance Tolerance
± 30%
No. Of Steps
64
Control Interface
Serial, I2C, 2-Wire
No. Of Pots
Single
Supply Voltage Range
2.7V To 5.5V
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
AD5171EVAL - BOARD EVAL FOR AD5171
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
AD5171BRJZ5-R2TR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD5171BRJZ5-R2
Manufacturer:
Microchip
Quantity:
446
FEATURES
64 position
One-time programmable (OTP) set-and-forget resistance
Unlimited adjustments prior to OTP activation
5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ end-to-end resistance
Low temperature coefficient: 5 ppm/°C in potentiometer mode
Low temperature coefficient: 35 ppm/°C in rheostat mode
Compact standard 8-lead SOT-23 package
Low power: I
Fast settling time: t
I
Computer software replaces microcontroller in factory
Full read/write of wiper register
Extra I
Low operating voltage: 2.7 V to 5.5 V
OTP validation check function
Automotive temperature range: −40°C to +125°C
APPLICATIONS
System calibrations
Electronics level settings
Mechanical trimmers and potentiometer replacements
Automotive electronics adjustments
Gain control and offset adjustments
Transducer circuit adjustments
Programmable filters up to 1.5 MHz BW
GENERAL DESCRIPTION
The AD5171 is a 64-position, one-time programmable (OTP)
digital potentiometer
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, I
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).
Rev. D
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 registered trademarks are the property of their respective owners.
2
C-compatible digital interface
setting—low cost alternative over EEMEM
programming applications
2
C device address pin
DD
= 10 μA maximum
S
2
= 5 μs typical in power-up
that uses fuse link technology to achieve
1
2
C®-
64- Position OTP Digital Potentiometer
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
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, Inc., 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 external
I
reduces the development time of the users.
An AD5171 evaluation kit includes the software, connector, and
cable that can be converted for factory programming applications.
The AD5171 is available in a compact 8-lead SOT-23 package.
All parts are guaranteed to operate over the automotive temper-
ature 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.
1
2
2
Applies to 5 kΩ parts only.
The terms digital potentiometer and RDAC are used interchangeably.
C controllers or host processors and, therefore, significantly
GND
SDA
SCL
AD0
V
DD
FUNCTIONAL BLOCK DIAGRAM
©2004–2008 Analog Devices, Inc. All rights reserved.
GND
SCL
V
DD
Figure 2. Pin Configuration
FUSE
W
LINK
CONTROL LOGIC
I
2
1
2
3
4
C INTERFACE
(Not to Scale)
AD5171
TOP VIEW
AND
Figure 1.
REGISTER
WIPER
8
7
6
5
A
B
AD0
SDA
AD5171
AD5171
www.analog.com
A
W
B

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AD5171BRJZ5-R2 Summary of contents

Page 1

FEATURES 64 position One-time programmable (OTP) 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 temperature coefficient: 5 ppm/°C in potentiometer mode Low temperature coefficient: ...

Page 2

AD5171 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Electrical Characteristics: 5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ Timing ...

Page 3

SPECIFICATIONS ELECTRICAL CHARACTERISTICS: 5 kΩ, 10 kΩ, 50 kΩ, AND 100 kΩ ± 10 −40°C < Table 1. Parameter DC ...

Page 4

AD5171 Parameter 8, 13, 14 DYNAMIC CHARACTERISTICS –3 dB Bandwidth Total Harmonic Distortion Adjustment Settling Time Power-Up Settling Time After Fuses Blown Resistor Noise Voltage 1 Typical specifications represent average readings at 25°C and V 2 Resistor position nonlinearity error, ...

Page 5

TIMING CHARACTERISTICS: 5 kΩ, 10 kΩ, 50 kΩ, AND 100 kΩ ± 10 −40°C < Table 2. Parameter INTERFACE TIMING ...

Page 6

AD5171 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter V to GND and V to GND Maximum Current Pulsed Continuous (R ≤ 1 kΩ, A Open) WB ...

Page 7

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 W Wiper Terminal W. GND ≤ Positive Power Supply. Specified for operation from 2 5.5 V. For OTP programming, V ...

Page 8

AD5171 TYPICAL PERFORMANCE CHARACTERISTICS 0. 0.08 0.06 –40°C 0.04 0.02 0 –0.02 –0.04 –0.06 +25°C –0.08 –0. CODE (DECIMAL) Figure 5. R-INL vs. Code vs. Temperature 0. ...

Page 9

0.1 –40 – 100 TEMPERATURE (°C) Figure 11. I Supply Current vs. Temperature DD 180 160 140 120 100 –20 ...

Page 10

AD5171 6 0x3F 0 0x20 –6 0x10 –12 0x08 –18 0x04 –24 0x02 –30 0x01 –36 –42 –48 0x00 –54 100 1k 10k FREQUENCY (Hz) Figure 17. Gain vs. Frequency vs. Code 25°C A CODE = ...

Page 11

OPEN 25° 5kΩ 10kΩ 50kΩ 100kΩ CODE (DECIMAL) ...

Page 12

AD5171 THEORY OF OPERATION SCL SDA The AD5171 allows unlimited 6-bit adjustments, except for the one-time programmable, set-and-forget resistance setting. OTP technology is a proven, cost-effective alternative over EEMEM in one-time memory programming applications. The AD5171 employs fuse link technology ...

Page 13

VARIABLE RESISTANCE AND VOLTAGE FOR RHEOSTAT MODE If only the W-to-B or W-to-A terminals are used as variable resistors, the unused terminal can be opened or shorted with Terminal W. This operation is called rheostat mode (see Figure 26). A ...

Page 14

AD5171 Ignoring the effect of the wiper resistance, the transfer function is simply more accurate calculation, which includes the wiper resistance effect, yields ...

Page 15

TERMINAL VOLTAGE OPERATING RANGE There are also ESD protection diodes between V RDAC terminals; therefore, the V of the AD5171 defines their DD voltage boundary conditions (see Figure 31). Supply signals present on Terminal A, Terminal B, and Terminal W ...

Page 16

AD5171 CONTROLLING THE AD5171 There are two ways of controlling the AD5171. Users can either program the devices with computer software or employ external controllers. SOFTWARE PROGRAMMING Due to the advantage of the one-time programmable feature, users ...

Page 17

Table 10. SDA Bits Definitions and Descriptions Bit Description S Start Condition. P Stop Condition. A Acknowledge. 2 AD0 I C Device Address Bit. Allows a maximum of two AD5171s to be addressed. X Don’t Care. T OTP Programming Bit. ...

Page 18

AD5171 the instruction byte, the last byte in the write mode is the data byte. Data is transmitted over the serial bus in sequences of nine clock pulses (eight data bits followed by an acknowledge bit). The transitions on the ...

Page 19

APPLICATIONS INFORMATION DAC It is common to buffer the output of the digital potentiometer as a DAC unless the load is much larger than R impede conversion and deliver higher current, if needed. 5V AD5171 OUT V ...

Page 20

AD5171 For log taper adjustment, such as volume control, Figure 44 shows another way of resistance scaling. In this circuit, the smaller the R2 with respect the more it behaves like the AB pseudo log taper characteristic. ...

Page 21

EVALUATION BOARD 10µF 1 10kΩ 10kΩ C2 GND 8 4 0.1µF SCL 7 SCL AD5170 SDA The AD5171 evaluation board ...

Page 22

... INDICATOR 0.15 MAX ORDERING GUIDE Model 1 R (kΩ) Temperature Range AB AD5171BRJ5-R2 5 −40°C to +125°C AD5171BRJ5-RL7 5 −40°C to +125°C 2 AD5171BRJZ5-R2 5 −40°C to +125°C AD5171BRJZ5- −40°C to +125°C AD5171BRJ10-R2 10 −40°C to +125°C AD5171BRJ10-RL7 10 −40°C to +125°C 2 AD5171BRJZ10-R2 10 − ...

Page 23

NOTES Rev Page AD5171 ...

Page 24

AD5171 NOTES Purchase of licensed components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I 2 Rights to use these components system, ...

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