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AD5290 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer AD5290
Beschreibung Compact 30V/+-15V 256-Position Digital Potentiometer
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 11 Seiten
AD5290 Datasheet, Funktion
www.DataSheet4U.com
Preliminary Technical Data
Compact +30V/±15V 256-Position Digital
Potentiometer
AD5290
FEATURES
256-position
+2.7V to +30V Single Supply Operation
±2.7V to ±15V Dual Supply Operation
End-to-end resistance 10 kΩ, 50 kΩ, 100 kΩ
Low temperature coefficient 35 ppm/°C
Power-on preset to midscale
SPI compatible interface
Automotive temperature range –40°C to +105°C
Compact MSOP-10 (3 mm × 4.9 mm) package
APPLICATIONS
Programmable Gain and Offset
Programmable Power Supply
Industrial Actuator Control
LED Array Driver
Audio Volume Control
General Purpose DAC Replacement
Mechanical Potentiometer Replacement
GENERAL OVERVIEW
The AD5290 is a low cost, compact 2.9 mm × 3 mm
+30V/±15V, 256-position digital potentiometer. This device
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 wiper settings are controllable through an SPI compatible
digital interface. The resistance between the wiper and either
end point of the fixed resistor varies linearly with respect to the
digital code transferred into the RDAC latch.
The AD5290 is available in 10k, 50k, and 100kin compact
MSOP-10 package. AD5290 can be operated from a single
supply +2.7 V to +30 V or dual supply ±2.7 V to ±15 V. All
parts are guaranteed to operate over the automotive
temperature range of -40°C to +105°C.
SDO
SDI
CLK
CS
FUNCTIONAL BLOCK DIAGRAM
AD5290
Q
8-Bit
8 8-Bit
SERIAL
LATCH
REG
8
D
CK
RS
POR
VDD
A
W
B
VSS
Figure 1.
DG ND
Note:
The terms digital potentiometer and RDAC are used interchangeably.
Rev. PrC
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 companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.






AD5290 Datasheet, Funktion
www.PDraetalSimheient4aUry.coTmechnical Data
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
A1
B2
VSS 3
GND 4
CS 5
10 W
9 VDD
AD5290 8 SDO
TOP VIEW 7 SDI
6 CLK
Figure 2. AD5290 Pin Configuration
AD5290
Table 7. AD5290 Pin Function Descriptions
Pin Menmonic
Description
1A
A Terminal. VSS VA VDD
2B
B Terminal. VSS VB VDD
3 VSS
Negative Supply. Connect to zero volts for single supply applications.
4 GND
Digital Ground.
5 CS
Chip Select Input, Active Low. When CS returns high, data will be loaded into the Wiper
Register
6 CLK
Serial Clock Input. Positive edge triggered
7 SDI
Serial Data Input Pin. Shifts in one bit at a time on positive clock CLK edges. MSB loaded first.
8 SDO
Serial Data Output Pin. Internal N-Ch FET with open-drain output that requires external pull-
up resistor. It shifts out the previous 8 SDI bits that allows daisy-chain operation of multiple
packages
9 VDD
Positive Power Supply
10 W
W Terminal. VSS VW VDD
Rev. Pr C | Page 6 of 11

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