AD5173BRM2.5-RL7 Analog Devices Inc, AD5173BRM2.5-RL7 Datasheet

IC DGTL POT DUAL 2.5K OTP 10MSOP

AD5173BRM2.5-RL7

Manufacturer Part Number
AD5173BRM2.5-RL7
Description
IC DGTL POT DUAL 2.5K OTP 10MSOP
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD5173BRM2.5-RL7

Rohs Status
RoHS non-compliant
Taps
256
Resistance (ohms)
2.5K
Number Of Circuits
2
Temperature Coefficient
35 ppm/°C Typical
Memory Type
Non-Volatile
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
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Resistance In Ohms
2.5K
Number Of Elements
2
# Of Taps
256
Resistance (max)
2.5KOhm
Power Supply Requirement
Single
Interface Type
Serial (2-Wire/I2C)
Single Supply Voltage (typ)
3/5V
Dual Supply Voltage (typ)
Not RequiredV
Single Supply Voltage (min)
2.7V
Single Supply Voltage (max)
5.5V
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Operating Temp Range
-40C to 125C
Operating Temperature Classification
Automotive
Mounting
Surface Mount
Pin Count
10
Lead Free Status / RoHS Status
Not Compliant
FEATURES
2-channel, 256-position potentiometers
One-time programmable (OTP) set-and-forget resistance
Unlimited adjustments prior to OTP activation
OTP overwrite allows dynamic adjustments with user-
End-to-end resistance: 2.5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ
Compact 10-lead MSOP: 3 mm × 4.9 mm
Fast settling time: t
Full read/write of wiper register
Power-on preset to midscale
Extra package address decode pins: AD0 and AD1 (AD5173)
Single supply: 2.7 V to 5.5 V
Low temperature coefficient: 35 ppm/°C
Low power: I
Wide operating temperature: −40°C to +125°C
APPLICATIONS
Systems calibration
Electronics level setting
Mechanical trimmers replacement in new designs
Permanent factory PCB setting
Transducer adjustment of pressure, temperature, position,
RF amplifier biasing
Automotive electronics adjustment
Gain control and offset adjustment
GENERAL DESCRIPTION
The AD5172/AD5173 are dual-channel, 256-position, one-time
programmable (OTP) digital potentiometers
link technology to achieve memory retention of resistance
settings. OTP is a cost-effective alternative to EEMEM for users
who do not need to program the digital potentiometer setting
in memory more than once. These devices perform the same
electronic adjustment function as mechanical potentiometers or
variable resistors but with enhanced resolution, solid-state reliabil-
ity, and superior low temperature coefficient performance.
The AD5172/AD5173 are programmed using a 2-wire, I
compatible digital interface. Unlimited adjustments are allowed
1
Rev. H
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.
The terms digital potentiometer, VR, and RDAC are used interchangeably.
setting provides a low cost alternative to EEMEM
defined preset
chemical, and optical sensors
DD
= 6 μA maximum
S
= 5 μs typical on power-up
1
that employ fuse
Dual-Channel, I
256-Position, One-Time Programmable,
2
C®-
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
before permanently setting the resistance value. During OTP
activation, a permanent blow fuse command freezes the wiper
position (analogous to placing epoxy on a mechanical trimmer).
Unlike traditional OTP digital potentiometers, the AD5172/
AD5173 have a unique temporary OTP overwrite feature that
allows for new adjustments even after a fuse is blown. However,
the OTP setting is restored during subsequent power-up condi-
tions. This allows users to treat these digital potentiometers as
volatile potentiometers with a programmable preset.
GND
GND
SDA
SDA
SCL
AD0
AD1
SCL
V
V
2
DD
DD
C Digital Potentiometers
FUNCTIONAL BLOCK DIAGRAMS
Figure 1. AD5172 Functional Block Diagram
Figure 2. AD5173 Functional Block Diagram
A1
©2003–2009 Analog Devices, Inc. All rights reserved.
ADDRESS
1
1
DECODE
REGISTER 1
REGISTER 1
RDAC
RDAC
W1
W1
SERIAL INPUT
SERIAL INPUT
B1
B1
REGISTER
REGISTER
AD5172/AD5173
8
8
LINKS
LINKS
FUSE
FUSE
A2
2
2
REGISTER 2
REGISTER 2
RDAC
RDAC
W2
W2
B2
B2
www.analog.com

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AD5173BRM2.5-RL7 Summary of contents

Page 1

FEATURES 2-channel, 256-position potentiometers One-time programmable (OTP) set-and-forget resistance setting provides a low cost alternative to EEMEM Unlimited adjustments prior to OTP activation OTP overwrite allows dynamic adjustments with user- defined preset End-to-end resistance: 2.5 kΩ, 10 kΩ, 50 kΩ, ...

Page 2

AD5172/AD5173 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagrams ............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Electrical Characteristics: 2.5 kΩ ............................................... 3 Electrical Characteristics: 10 kΩ, 50 kΩ, and 100 ...

Page 3

SPECIFICATIONS ELECTRICAL CHARACTERISTICS: 2.5 kΩ ± 10 ± 10 Table 1. Parameter DC CHARACTERISTICS—RHEOSTAT MODE 2 Resistor Differential Nonlinearity 2 Resistor Integral Nonlinearity 3 Nominal Resistor Tolerance Resistance ...

Page 4

AD5172/AD5173 Parameter V Settling Time W Resistor Noise Voltage Density 1 Typical specifications represent average readings at 25°C and V 2 Resistor position nonlinearity error, R-INL, is the deviation from an ideal value measured between the maximum resistance and the ...

Page 5

Parameter POWER SUPPLIES Power Supply Range 9, 10 OTP Supply Voltage Supply Current OTP Supply Current 9, 11 Power Dissipation Power Supply Sensitivity 14 DYNAMIC CHARACTERISTICS Bandwidth, −3 dB Total Harmonic Distortion V Settling Time W Resistor Noise ...

Page 6

AD5172/AD5173 TIMING CHARACTERISTICS ± 10 ± 10 Table 3. Parameter INTERFACE TIMING CHARACTERISTICS SCL Clock Frequency Bus-Free Time Between Stop and Start, t Hold Time ...

Page 7

ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 4. Parameter V to GND GND Terminal Current Bx Wx Pulsed Continuous ...

Page 8

AD5172/AD5173 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS AD5172 TOP VIEW (Not to Scale) GND Figure 4. AD5172 Pin Configuration Table 5. AD5172 Pin Function Descriptions Pin ...

Page 9

TYPICAL PERFORMANCE CHARACTERISTICS 2.0 1.5 1 2. 5.5V DD –0.5 –1.0 –1.5 –2 128 160 CODE (DECIMAL) Figure 6. R-INL vs. Code vs. Supply Voltages 0.5 0.4 0.3 0.2 ...

Page 10

AD5172/AD5173 2 –40°C, +25°C, +85°C, +125°C A 1.0 0 5.5V DD –0 –40°C, +25°C, +85°C, +125°C A –1.0 –1.5 –2 128 160 CODE (DECIMAL) ...

Page 11

–40°C TO +85°C, –40°C TO +125° – 5. –40°C TO +85°C, –40°C TO +125°C A –20 – 128 ...

Page 12

AD5172/AD5173 5. 2.7V DD 0.01 0 0.5 1.0 1.5 2.0 2.5 3.0 DIGITAL INPUT VOLTAGE (V) Figure 24. Supply Current vs. Digital Input Voltage V W SCL Figure 25. Digital Feedthrough V ...

Page 13

T CHANNEL 1 MAXIMUM: 103mA CHANNEL 1 MINIMUM: –1.98mA 1 CH1 20.0mA M 200ns A CH1 T 588.000ns Figure 30. OTP Program Energy for Single Fuse 32.4mA Rev Page AD5172/AD5173 ...

Page 14

AD5172/AD5173 TEST CIRCUITS Figure 31 to Figure 38 illustrate the test circuits that define the test conditions used in the product specification tables (see Table 1 and Table 2). DUT 1LSB = V+/ ...

Page 15

THEORY OF OPERATION SCL SDA The AD5172/AD5173 are 256-position, digitally controlled variable resistors (VRs) that employ fuse link technology to achieve memory retention of the resistance setting. An internal power-on preset places the wiper at midscale during power-on. If the ...

Page 16

AD5172/AD5173 RDAC S LATCH AND DECODER Figure 41. AD5172/AD5173 Equivalent RDAC Circuit The general equation that determines the digitally programmed output resistance between W and ...

Page 17

ESD PROTECTION All digital inputs, SDA, SCL, AD0, and AD1, are protected with a series input resistor and parallel Zener ESD structures, as shown in Figure 43 and Figure 44. 340Ω LOGIC GND Figure 43. ESD Protection of Digital Pins ...

Page 18

AD5172/AD5173 LAYOUT CONSIDERATIONS In PCB layout good practice to employ compact, minimum lead length design. The leads to the inputs should be as direct as possible with a minimum conductor length. Ground paths should have low resistance ...

Page 19

I C INTERFACE WRITE MODE Table 10. AD5172 Write Mode Slave address byte Table 11. AD5173 Write Mode 1 AD1 AD0 Slave address byte ...

Page 20

AD5172/AD5173 CONTROLLER PROGRAMMING Write Bit Patterns 1 SCL SDA START BY FRAME 1 MASTER SLAVE ADDRESS BYTE 1 SCL AD1 AD0 SDA START BY FRAME 1 ...

Page 21

I C-COMPATIBLE, 2-WIRE SERIAL BUS This section describes how the 2-wire, I protocol operates. The master initiates a data transfer by establishing a start condition, which is when a high-to-low transition on the SDA line occurs while SCL is ...

Page 22

AD5172/AD5173 Multiple Devices on One Bus (AD5173 Only) Figure 52 shows four AD5173 devices on the same serial bus. Each has a different slave address because the states of the AD0 and AD1 pins are different. This allows each device ...

Page 23

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Page 24

AD5172/AD5173 NOTES 2 Purchase of licensed I C components of Analog Devices, Inc., or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I Patent Rights to use these components ...

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