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AD5282BRU20 датащи(PDF) 1 Page - Analog Devices

номер детали AD5282BRU20
подробное описание детали  15V, I2C Compatible Digital Potentiometers
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
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PRELIMINARY TECHNICAL DATA
a
+15V, I2C Compatible
Digital Potentiometers
Preliminary Technical Data
AD5280/AD5282
REV PrE 12 MAR 02
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 which may result from its use. No license is granted by
implication or otherwise under any patent or patent rights of Analog Devices.
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
©Analog Devices, Inc., 2002
FEATURES
256 Position
AD5280 – 1-Channel
AD5282 – 2-Channel (Independently Programmable)
Potentiometer Replacement
20K, 50K, 200K Ohm with TC < 50ppm/ºC
Internal Power ON Mid-Scale Preset
+5 to +15V Single-Supply; ±5.5V Dual-Supply Operation
I
2C Compatible Interface
APPLICATIONS
Multi-Media, Video & Audio
Communications
Mechanical Potentiometer Replacement
Instrumentation: Gain, Offset Adjustment
Programmable Voltage to Current Conversion
Line Impedance Matching
GENERAL DESCRIPTION
The AD5280/AD5282 provides a single/dual channel, 256 position
digitally-controlled variable resistor (VR) device. These devices
perform the same electronic adjustment function as a
potentiometer, trimmer or variable resistor. Each VR offers a
completely programmable value of resistance, between the A
terminal and the wiper, or the B terminal and the wiper. The fixed
A-to-B terminal resistance of 20, 50 or 200K ohms has a 1%
channel-to-channel matching tolerance with a nominal temperature
coefficient of 30 ppm/°C.
Wiper Position programming defaults to midscale at system power
ON. Once powered the VR wiper position is programmed by a I
2C
compatible 2-wire serial data interface. Both parts have two
programmable logic outputs available to drive digital loads, gates,
LED drivers, analog switches, etc.
FUNCTIONAL BLOCK DIAGRAMS
RDAC1 REGISTER
ADDRESS
DECODE
SERIAL INPUT REGISTER
PWR ON
RESET
SDA
SCL
V
SS
V
DD
GND
A
1
W
1
B
1
AD5280
8
SHDN
RDAC2 REGISTER
O
1
RR
V
L
AD0
AD1
O
2
RDAC1 REGISTER
ADDRESS
DECODE
SERIAL INPUT REGISTER
PWR ON
RESET
SDA
SCL
V
SS
V
DD
GND
A
1
W
1
B
1
AD5282
8
SHDN
RDAC2 REGISTER
A
2
W
2
B
2
RR
V
L
AD0
AD1
OUTPUT
REGISTER
O
1
R
The AD5280/AD5282 are available in ultra compact surface mount
thin TSSOP-14/-16 packages. All parts are guaranteed to operate
over the extended industrial temperature range of -40°C to +85°C.
For 3-wire, SPI compatible interface applications, see
AD5203/AD5204/AD5206/AD7376/AD8400/AD8402/AD8403/
AD5260/AD5262/AD5200/AD5201 products.
ORDERING GUIDE
Kilo
Package
Package
Model
Ohms
Temp
Description
Option
AD5280BRU20
20
-40/+85°C
TSSOP-14
RU-14
AD5280BRU50
50
-40/+85°C
TSSOP-14
RU-14
AD5280BRU200
200
-40/+85°C
TSSOP-14
RU-14
AD5282BRU20
20
-40/+85°C
TSSOP-16
RU-16
AD5282BRU50
50
-40/+85°C
TSSOP-16
RU-16
AD5282BRU200
200
-40/+85°C
TSSOP-16
RU-16
The AD5280/AD5282 die size is 75 mil X 120 mil, 9,000 sq. mil.
Contains xxx transistors. Patent Number xxx applies.


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