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PDF AD5162 Data sheet ( Hoja de datos )

Número de pieza AD5162
Descripción SPI Digital Potentiometer
Fabricantes Analog Devices 
Logotipo Analog Devices Logotipo



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FEATURES
2-channel, 256-position potentiometer
End-to-end resistance: 2.5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ
Compact 10-lead MSOP (3 mm × 4.9 mm) package
Fast settling time: tS = 5 µs typical on power-up
Full read/write of wiper register
Power-on preset to midscale
Computer software replaces microcontroller in factory
programming applications
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 available
Qualified for automotive applications
APPLICATIONS
Systems calibrations
Electronics level settings
Mechanical trimmers replacement in new designs
Permanent factory PCB setting
Transducer adjustment of pressure, temperature, position,
chemical, and optical sensors
RF amplifier biasing
Automotive electronics adjustment
Gain control and offset adjustment
GENERAL DESCRIPTION
The AD5162 provides a compact 3 mm × 4.9 mm packaged
solution for dual, 256-position adjustment applications. This
device performs the same electronic adjustment function as a
3-terminal mechanical potentiometer. Available in four end-to-
end resistance values (2.5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ), this low
temperature coefficient device is ideal for high accuracy and
stability-variable resistance adjustments. The wiper settings are
controllable through an SPI digital interface. The resistance
between the wiper and either endpoint of the fixed resistor
varies linearly with respect to the digital code transferred into
the RDAC latch.1
Dual, 256-Position, SPI
Digital Potentiometer
AD5162
FUNCTIONAL BLOCK DIAGRAM
A1 W1 B1
W2 B2
VDD
GND
CLK
SDI
CS
WIPER
REGISTER 1
A=0
WIPER
REGISTER 2
A=1
AD5162
SPI INTERFACE
Figure 1.
Operating from a 2.7 V to 5.5 V power supply and consuming
less than 6 µA allows the AD5162 to be used in portable battery-
operated applications.
For applications that program the AD5162 at the factory,
Analog Devices offers device programming software running
on Windows® NT/2000/XP operating systems. This software
effectively replaces the need for external SPI controllers, which
in turn enhances the time to market of systems. An AD5162
evaluation kit and software are available. The kit includes a
cable and instruction manual.
1 The terms digital potentiometer, VR, and RDAC are used interchangeably.
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
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 ©2003–2010 Analog Devices, Inc. All rights reserved.

1 page




AD5162 pdf
AD5162
ELECTRICAL CHARACTERISTICS: 10 kΩ, 50 kΩ, AND 100 kΩ VERSIONS
VDD = 5 V ± 10%, or 3 V ± 10%; VA = VDD; VB = 0 V; −40°C < TA < 125°C; unless otherwise noted.
Table 2.
Parameter
DC CHARACTERISTICS—RHEOSTAT MODE
Resistor Differential Nonlinearity2
Resistor Integral Nonlinearity2
Nominal Resistor Tolerance3
Resistance Temperature Coefficient
Wiper Resistance
DC CHARACTERISTICS—POTENTIOMETER
DIVIDER MODE4
Differential Nonlinearity5
Integral Nonlinearity5
Voltage Divider Temperature Coefficient
Full-Scale Error
Zero-Scale Error
RESISTOR TERMINALS
Voltage Range6
Capacitance A, B7
Capacitance W7
Common-Mode Leakage
DIGITAL INPUTS AND OUTPUTS
Input Logic High
Input Logic Low
Input Logic High
Input Logic Low
Input Current
Input Capacitance
POWER SUPPLIES
Power Supply Range
Supply Current
Power Dissipation
Power Supply Sensitivity
DYNAMIC CHARACTERISTICS
Bandwidth, −3 dB
Total Harmonic Distortion
VW Settling Time
Resistor Noise Voltage Density
Symbol
Conditions
R-DNL
R-INL
∆RAB
(∆RAB/RAB )/∆T
RWB
RWB, VA = no connect
RWB, VA = no connect
TA = 25°C
VAB = VDD, wiper = no connect
Code = 0x00, VDD = 5 V
Min Typ1
−1 ±0.1
−2.5 ±0.25
−20
35
160
Max Unit
+1 LSB
+2.5 LSB
+20 %
ppm/°C
200 Ω
DNL
INL
(∆VW/VW)/∆T
VWFSE
VWZSE
VA, VB, VW
CA, CB
CW
ICM
VIH
VIL
VIH
VIL
IIL
CIL
VDD RANGE
IDD
PDISS
PSS
BW
THDW
tS
eN_WB
Code = 0x80
Code = 0xFF
Code = 0x00
−1 ±0.1
−1 ±0.3
15
−2.5 −1
01
+1 LSB
+1 LSB
ppm/°C
0 LSB
2.5 LSB
f = 1 MHz, measured to GND,
code = 0x80
f = 1 MHz, measured to GND,
code = 0x80
VA = VB = VDD/2
VDD = 5 V
VDD = 5 V
VDD = 3 V
VDD = 3 V
VIN = 0 V or 5 V
GND
45
60
1
2.4
2.1
5
VDD V
pF
pF
nA
V
0.8 V
V
0.6 V
±1 µA
pF
VIH = 5 V or VIL = 0 V
VIH = 5 V or VIL = 0 V, VDD = 5 V
VDD = 5 V ± 10%, code = midscale
2.7
RAB = 10 kΩ/50 kΩ/100 kΩ,
code = 0x80
VA = 1 V rms, VB = 0 V,
f = 1 kHz, RAB = 10 kΩ
VA = 5 V, VB = 0 V,
±1 LSB error band
RWB = 5 kΩ, RS = 0
3.5
±0.02
5.5
6
30
±0.08
V
µA
µW
%/%
600/100/40
0.1
2
9
kHz
%
µs
nV/√Hz
1 Typical specifications represent average readings at 25°C and VDD = 5 V.
2 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 the ideal between successive tap positions. Parts are guaranteed monotonic.
3 VA = VDD, VB = 0 V, wiper (VW) = no connect.
4 Specifications apply to all VRs.
5 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.
6 Resistor Terminal A, Resistor Terminal B, and Resistor Terminal W have no limitations on polarity with respect to each other.
7 Guaranteed by design, but not subject to production test.
Rev. C | Page 4 of 20

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AD5162 arduino
AD5162
50
RAB = 10k
40
30
VDD = 2.7V
20 TA = –40°C TO +85°C, –40°C TO +125°C
10
0
–10 VDD = 5.5V
TA = –40°C TO +85°C, –40°C TO +125°C
–20
–30
0
32 64 96 128 160 192 224 256
CODE (DECIMAL)
Figure 15. Potentiometer Mode Tempco ΔVWB/ΔT vs. Code
0
–6 0x80
–12 0x40
0x20
–18
0x10
–24 0x08
–30 0x04
–36
–42 0x02 0x01
–48
–54
–60
10k 100k 1M 10M
FREQUENCY (Hz)
Figure 16. Gain vs. Frequency vs. Code, RAB = 2.5 kΩ
0
–6 0x80
–12 0x40
–18 0x20
0x10
–24
0x08
–30
0x04
–36 0x02
–42 0x01
–48
–54
–60
1k
10k 100k 1M
FREQUENCY (Hz)
Figure 17. Gain vs. Frequency vs. Code, RAB = 10 kΩ
0
–6 0x80
–12 0x40
–18 0x20
–24 0x10
–30 0x08
0x04
–36
0x02
–42
0x01
–48
–54
–60
1k
10k 100k 1M
FREQUENCY (Hz)
Figure 18. Gain vs. Frequency vs. Code, RAB = 50 kΩ
0
–6 0x80
–12 0x40
–18 0x20
–24 0x10
–30 0x08
–36 0x04
0x02
–42
0x01
–48
–54
–60
1k
10k 100k 1M
FREQUENCY (Hz)
Figure 19. Gain vs. Frequency vs. Code, RAB = 100 kΩ
0
–6
–12
–18
–24
–30
–36
–42
–48
–54
–60
1k
100k
60kHz
50k
120kHz
10k
570kHz
2.5k
2.2MHz
10k 100k
1M
FREQUENCY (Hz)
Figure 20. −3 dB Bandwidth at Code = 0x80
10M
Rev. C | Page 10 of 20

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