AD5293BRUZ-20 Analog Devices Inc, AD5293BRUZ-20 Datasheet

IC DGTL POT 1024POS 20K 14TSSOP

AD5293BRUZ-20

Manufacturer Part Number
AD5293BRUZ-20
Description
IC DGTL POT 1024POS 20K 14TSSOP
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD5293BRUZ-20

Temperature Coefficient
35 ppm/°C Typical
Taps
1024
Resistance (ohms)
20K
Number Of Circuits
1
Interface
SPI Serial
Voltage - Supply
9 V ~ 33 V, ±9 V ~ 16.5 V
Operating Temperature
-40°C ~ 105°C
Mounting Type
Surface Mount
Package / Case
14-TSSOP
Resistance In Ohms
20K
End To End Resistance
20kohm
Track Taper
Linear
No. Of Steps
256
Resistance Tolerance
± 1%
Control Interface
Serial, SPI
No. Of Pots
Single
Potentiometer Ic
RoHS Compliant
Supply Voltage Range
± 9V To ± 16.5V
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Memory Type
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
AD5293BRUZ-20-U1
AD5293BRUZ-20-U1

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD5293BRUZ-20
Manufacturer:
Analog Devices Inc
Quantity:
1 941
Part Number:
AD5293BRUZ-20
Manufacturer:
ADI/亚德诺
Quantity:
20 000
FEATURES
Single-channel, 1024-position resolution
20 kΩ, 50 kΩ, and 100 kΩ nominal resistance
Calibrated 1% nominal resistor tolerance (resistor
Rheostat mode temperature coefficient: 35 ppm/°C
Voltage divider temperature coefficient: 5 ppm/°C
Single-supply operation: 9 V to 33 V
Dual-supply operation: ±9 V to ±16.5 V
SPI-compatible serial interface
Wiper setting readback
APPLICATIONS
Mechanical potentiometer replacement
Instrumentation: gain and offset adjustment
Programmable voltage-to-current conversion
Programmable filters, delays, and time constants
Programmable power supply
Low resolution DAC replacements
Sensor calibration
GENERAL DESCRIPTION
The AD5293 is a single-channel, 1024-position digital
potentiometer
The AD5293 performs the same electronic adjustment function as
a mechanical potentiometer with enhanced resolution, solid state
reliability, and superior low temperature coefficient performance.
This device is capable of operating at high voltages and supporting
both dual-supply operation at ±10.5 V to ±15 V and single-supply
operation at 21 V to 30 V.
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.
performance mode)
1
with a <1% end-to-end resistor tolerance error.
1% R-Tolerance Digital Potentiometer
Single-Channel, 1024-Position,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The AD5293 offers guaranteed industry-leading low resistor
tolerance errors of ±1% with a nominal temperature coefficient
of 35 ppm/°C. The low resistor tolerance feature simplifies open-
loop applications as well as precision calibration and tolerance
matching applications.
The AD5293 is available in a compact 14-lead TSSOP package.
The part is guaranteed to operate over the extended industrial
temperature range of −40°C to +105°C.
1
In this data sheet, the terms digital potentiometer and RDAC are used
interchangeably.
V
SYNC
SCLK
LOGIC
SDO
RDY
DIN
FUNCTIONAL BLOCK DIAGRAM
INTERFACE
POWER-ON
©2009–2011 Analog Devices, Inc. All rights reserved.
SERIAL
RESET
V
DD
V
SS
Figure 1.
10
EXT_CAP
REGISTER
RESET
RDAC
GND
AD5293
AD5293
www.analog.com

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AD5293BRUZ-20 Summary of contents

Page 1

FEATURES Single-channel, 1024-position resolution 20 kΩ, 50 kΩ, and 100 kΩ nominal resistance Calibrated 1% nominal resistor tolerance (resistor performance mode) Rheostat mode temperature coefficient: 35 ppm/°C Voltage divider temperature coefficient: 5 ppm/°C Single-supply operation ...

Page 2

AD5293 TABLE OF CONTENTS Features ...............................................................................................1 Applications........................................................................................1 Functional Block Diagram ...............................................................1 General Description ..........................................................................1 Revision History ................................................................................2 Specifications......................................................................................3 Electrical Characteristics—20 kΩ Versions ...............................3 Resistor Performance Mode Code Range—20 kΩ Versions ...4 Electrical Characteristics—50 kΩ and 100 kΩ Versions..........5 Resistor Performance ...

Page 3

SPECIFICATIONS ELECTRICAL CHARACTERISTICS—20 kΩ VERSIONS 10 16 −40°C < T < +105°C, unless otherwise noted. A Table 1. Parameter DC ...

Page 4

AD5293 Parameter 4, 8 DYNAMIC CHARACTERISTICS Bandwidth Total Harmonic Distortion V Settling Time W Resistor Noise Density 1 Typicals represent average readings at 25° Resistor position nonlinearity error. R-INL is the deviation from an ideal value measured ...

Page 5

ELECTRICAL CHARACTERISTICS—50 kΩ AND 100 kΩ VERSIONS 10 16 −40°C < T < +105°C, unless otherwise noted. A Table 3. ...

Page 6

AD5293 Parameter 4, 8 DYNAMIC CHARACTERISTICS Bandwidth Total Harmonic Distortion V Settling Time W Resistor Noise Density 1 Typicals represent average readings at 25° Resistor position nonlinearity error. R-INL is the deviation from an ideal value measured ...

Page 7

INTERFACE TIMING SPECIFICATIONS ± 2 5.5 V, and −40°C < LOGIC Table 5. 1 Parameter Limit Unit min min 2 ...

Page 8

AD5293 TIMING DIAGRAMS SCLK SYNC DIN SDO t 10 RDY RESET SCLK SYNC DIN SDO RDY Figure 3. Write Timing Diagram, ...

Page 9

ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 6. Parameter V to GND GND GND LOGIC GND ...

Page 10

AD5293 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 8. Pin Function Descriptions Pin No. Mnemonic Description 1 RESET Hardware Reset Pin. Sets the RDAC register to midscale. RESET is activated at the logic high transition. Tie RESET not ...

Page 11

TYPICAL PERFORMANCE CHARACTERISTICS 1.0 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 0 128 256 384 512 640 CODE (Decimal) Figure 6. R-INL in R-Perf Mode vs. Code vs. Temperature 0 20kΩ AB 0.5 0.4 0.3 ...

Page 12

AD5293 0. 20kΩ AB 0.10 0.05 0 –0.05 –0.10 –0.15 +25°C –40°C –0.20 0 128 256 384 512 640 CODE (Decimal) Figure 12. R-DNL in Normal Mode vs. Code vs. Temperature 1 20kΩ AB 1.0 0.5 ...

Page 13

R = 20kΩ AB 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 0 128 256 384 512 640 768 CODE (Decimal) Figure 18. INL in Normal Mode vs. Code vs. Temperature 0.10 0.05 0 –0.05 –0.10 –0.15 –0.20 0 ...

Page 14

AD5293 700 600 500 400 300 200 100 0 0 256 512 CODE (Decimal) Figure 24. Rheostat Mode Tempco ΔR 0 0x200 –5 –10 0x100 –15 0x080 –20 0x040 –25 0x020 –30 0x010 –35 0x008 –40 0x004 –45 0x002 0x001 ...

Page 15

±15V DD SS CODE = HALF SCALE – rms IN Noise BW = 22kHz 20kΩ –30 50kΩ 100kΩ –45 –60 –75 –90 –105 –120 100 1k 10k FREQUENCY (Hz) Figure 30. Total Harmonic ...

Page 16

AD5293 1.2 1.0 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 – TIME (µs) Figure 36. Maximum Transition Glitch 300 ±15V DD SS 20kΩ 250 50kΩ 100kΩ 200 150 100 ...

Page 17

TEST CIRCUITS Figure 39 to Figure 44 define the test conditions used in the Specifications section. NC DUT CONNECT Figure 39. Resistor Position Nonlinearity Error (Rheostat Operation: R-INL, R-DNL) DUT ...

Page 18

AD5293 THEORY OF OPERATION The AD5293 digital potentiometer is designed to operate as a true variable resistor for analog signals that remain within the terminal voltage range of V < TERM ±1% resistor tolerance feature helps to minimize ...

Page 19

RESET A low-to-high transition of the hardware RESET pin loads the RDAC register with midscale. The AD5293 can also be reset through software by executing Command 3 (see The control register is restored with default bits (see RESISTOR PERFORMANCE MODE ...

Page 20

AD5293 Table 13. Control Register Function Register Name Bit Name Control C2 C1 RDAC ARCHITECTURE To achieve optimum performance, Analog Devices, Inc., has patented the RDAC segmentation architecture for all the digital potentiometers. In particular, the AD5293 employs a 3-stage ...

Page 21

PROGRAMMING THE POTENTIOMETER DIVIDER Voltage Output Operation The digital potentiometer easily generates a voltage divider at wiper-to-B terminal and wiper-to-A terminal that is proportional to the input voltage shown in Figure 48. Unlike the polarity ...

Page 22

AD5293 APPLICATIONS INFORMATION HIGH VOLTAGE DAC The AD5293 can be configured as a high voltage DAC, with an output voltage as high The circuit is shown in Figure 51. The output is ⎡ ⎤ ⎛ ⎞ D ...

Page 23

AUDIO VOLUME CONTROL The excellent THD performance and high voltage capability of the AD5293 make it ideal for digital volume control. The AD5293 is used as an audio attenuator; it can be connected directly to a gain amplifier. A large ...

Page 24

... COPLANARITY 0.10 ORDERING GUIDE 1 Model R (kΩ) AB AD5293BRUZ-20 20 AD5293BRUZ-20-RL7 20 AD5293BRUZ-50 50 AD5293BRUZ-50-RL7 50 AD5293BRUZ-100 100 AD5293BRUZ-100-RL7 100 RoHS Compliant Part. ©2009–2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 5.10 5 ...

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