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What is AD5170?

This electronic component, produced by the manufacturer "Analog Devices", performs the same function as "I2C Digital Potentiometer".


AD5170 Datasheet PDF - Analog Devices

Part Number AD5170
Description I2C Digital Potentiometer
Manufacturers Analog Devices 
Logo Analog Devices Logo 


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256-Position, Two-Time Programmable,
I2C Digital Potentiometer
AD5170
FEATURES
256-position digital potentiometer
Two-time programmable (TTP) set-and-forget resistance
setting allows second-chance permanent programming
Unlimited adjustments prior to one-time programming
(OTP) activation
OTP overwrite allows dynamic adjustments with user-
defined preset
End-to-end resistance: 2.5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
Compact 10-lead MSOP: 3 mm × 4.9 mm package
Fast settling time: tS = 5 μs typical in power-up
Full read/write of wiper register
Power-on preset to midscale
Extra package address decode pins: AD0 and AD1
Single supply: 2.7 V to 5.5 V
Low temperature coefficient: 35 ppm/°C
Low power: IDD = 6 μA maximum
Wide operating temperature: −40°C to +125°C
Evaluation board and software are available
Software replaces MicroConverter® in factory programming
applications
APPLICATIONS
Systems calibration
Electronics level setting
Mechanical trimmers replacement in new designs
Permanent factory PCB settings
Transducer adjustment of pressure, temperature, position,
chemical, and optical sensors
RF amplifier biasing
Automotive electronics adjustments
Gain control and offset adjustments
GENERAL DESCRIPTION
The AD5170 is a 256-position, two-time programmable, digital
potentiometer1 that employs fuse link technology, giving users
two opportunities to permanently program the resistance setting.
For users who do not need to program the digital potentiometer
setting in memory more than once, the OTP feature is a cost-
effective alternative to EEMEM. The AD5170 performs the same
electronic adjustment function as mechanical potentiometers or
variable resistors with enhanced resolution, solid-state reliability,
and superior low temperature coefficient performance.
The AD5170 is programmed using a 2-wire, I2C®-compatible
digital interface. Unlimited adjustments are allowed before
permanently setting the resistance value, and there are two
opportunities for permanent programming. During OTP
1 The terms digital potentiometer, VR, and RDAC are used interchangeably.
Rev. G
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
FUNCTIONAL BLOCK DIAGRAM
AW
B
VDD
GND
AD0
AD1
SDA
SCL
FUSE
1 LINKS 2
RDAC
REGISTER
ADDRESS
DECODE
8
SERIAL INPUT
REGISTER
Figure 1.
activation, a permanent blow fuse command freezes the wiper
position (analogous to placing epoxy on a mechanical trimmer).
Unlike traditional OTP digital potentiometers, the AD5170 has
a unique temporary OTP overwrite feature that allows for new
adjustments even after the fuse is blown. However, the OTP setting
is restored during subsequent power-up conditions. This feature
allows users to treat these digital potentiometers as volatile poten-
tiometers with a programmable preset.
For applications that program the AD5170 at the factory, Analog
Devices, Inc., offers device programming software that runs on
Windows NT®, Windows® 2000, and Windows XP operating
systems. This software effectively replaces any external I2C con-
trollers, thus enhancing the time-to-market of the user’s systems.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2003–2011 Analog Devices, Inc. All rights reserved.

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AD5170 equivalent
AD5170
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS: 2.5 kΩ
VDD = 5 V ± 10% or 3 V ± 10%, VA = VDD, VB = 0 V, −40°C < TA < +125°C, unless otherwise noted.
Table 1.
Parameter
DC CHARACTERISTICS—RHEOSTAT MODE
Resistor Differential Nonlinearity2
Resistor Integral Nonlinearity2
Nominal Resistor Tolerance3
Resistance Temperature Coefficient
RWB (Wiper Resistance)
DC CHARACTERISTICS—POTENTIOMETER DIVIDER
MODE (SPECIFICATIONS APPLY TO ALL VRs)
Differential Nonlinearity4
Integral Nonlinearity4
Voltage Divider Temperature Coefficient
Full-Scale Error
Zero-Scale Error
RESISTOR TERMINALS
Voltage Range5
Capacitance A, Capacitance B6
Capacitance W6
Shutdown Supply Current7
Common-Mode Leakage
DIGITAL INPUTS AND OUTPUTS
Input Logic High (SDA and SCL)8
Input Logic Low (SDA and SCL)8
Input Logic High (AD0 and AD1)
Input Logic Low (AD0 and AD1)
Input Current
Input Capacitance6
POWER SUPPLIES
Power Supply Range
OTP Supply Voltage8, 9
Supply Current
OTP Supply Current8, 10, 11
Power Dissipation12
Power Supply Sensitivity
Symbol
Conditions
R-DNL
R-INL
∆RAB
(∆RAB/RAB)/∆T
RWB
RWB, VA = no connect
RWB, VA = no connect
TA = 25°C
Code = 0x00, VDD = 5 V
DNL
INL
(∆VW/VW)/∆T
VWFSE
VWZSE
Code = 0x80
Code = 0xFF
Code = 0x00
VA, VB, VW
CA, CB
CW
IA_SD
ICM
f = 1 MHz, measured to GND,
code = 0x80
f = 1 MHz, measured to GND,
code = 0x80
VDD = 5.5 V
VA = VB = VDD/2
VIH VDD = 5 V
VIL VDD = 5 V
VIH VDD = 3 V
VIL VDD = 3 V
IIL VIN = 0 V or 5 V
CIL
VDD RANGE
VDD_OTP
IDD
IDD_OTP
PDISS
PSS
TA = 25°C
VIH = 5 V or VIL = 0 V
VDD_OTP = 5 V, TA = 25°C
VIH = 5 V or VIL = 0 V, VDD = 5 V
VDD = 5 V ± 10%, code =
midscale
Min Typ1 Max
−2 ±0.1 +2
−14 ±2 +14
−20 +55
35
160 200
Unit
LSB
LSB
%
ppm/°C
Ω
−1.5 ±0.1 +1.5
−2 ±0.6 +2
15
−14 −5.5 0
0 4.5 12
LSB
LSB
ppm/°C
LSB
LSB
GND
45
VDD
60
0.01 1
1
V
pF
pF
μA
nA
0.7 VDD
−0.5
2.1
5
VDD + 0.5
+0.3 VDD
0.6
±1
V
V
V
V
μA
pF
2.7 5.5 V
5.6 5.7 5.8
V
3.5 6
μA
100 mA
33 μW
±0.02 ±0.08 %/%
Rev. G | Page 4 of 24


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