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AD5241BR1M Datasheet

  • AD5241BR1M

  • I2C Compatible 256-Position Digital Potentiometers

  • 348.78KB

  • 16頁(yè)

  • AD

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a
FEATURES
256 Positions
10 k , 100 k , 1 M
Low Tempco 30 ppm/ C
Internal Power ON Midscale Preset
Single-Supply 2.7 V to 5.5 V or
Dual-Supply 2.7 V for AC or Bipolar Operation
2
I C Compatible Interface with Readback Capability
Extra Programmable Logic Outputs
Self-Contained Shutdown Feature
Extended Temperature Range 鈥?0 C to +105 C
APPLICATIONS
Multimedia, Video, and Audio
Communications
Mechanical Potentiometer Replacement
Instrumentation: Gain, Offset Adjustment
Programmable Voltage-to-Current Conversion
Line Impedance Matching
I
2
C
廬
Compatible
256-Position Digital Potentiometers
AD5241/AD5242
FUNCTIONAL BLOCK DIAGRAM
A
1
W
1
B
1
O
1
O
2
SHDN
V
DD
V
SS
ADDR
DECODE
AD5241
RDAC
REGISTER 1
REGISTER 2
8
SDA
SCL
GND
SERIAL INPUT REGISTER
PWR-ON
RESET
AD0
AD1
A
1
W
1
B
1
A
2
W
2
B
2
O
1
O
2
SHDN
REGISTER
GENERAL DESCRIPTION
The AD5241/AD5242 provide 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.
For AD5242, the fixed A-to-B terminal resistance of 10 k鈩?
100 k鈩? or 1 M鈩?has a 1% channel-to-channel matching
tolerance. The nominal temperature coefficient of both parts is
30 ppm/擄C.
Wiper position programming defaults to midscale at system
power ON. Once powered, the VR wiper position is programmed
by an I
2
C compatible 2-wire serial data interface. Both parts
have available two extra programmable logic outputs that
enable users to drive digital loads, logic gates, LED drivers, and
analog switches in their system.
The AD5241/AD5242 are available in surface-mount (SOIC-14/-
16) packages and, for ultracompact solutions, TSSOP-14/-16
packages. All parts are guaranteed to operate over the
extended temperature range of 鈥?0擄C to +105擄C. For 3-wire,
SPI compatible interface applications, please refer to AD5200,
AD5201, AD5203, AD5204, AD5206, AD5231* AD5232*
,
,
AD5235* AD7376, AD8400, AD8402, and AD8403 products.
,
V
DD
V
SS
RDAC
REGISTER 1
RDAC
REGISTER 2
ADDR
DECODE
AD5242
1
8
PWR-ON
RESET
SDA
SCL
GND
SERIAL INPUT REGISTER
AD0
AD1
*Nonvolatile
digital potentiometer
I
2
C is a registered trademark of Philips Corporation.
REV. B
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. 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
漏 Analog Devices, Inc., 2002

AD5241BR1M 產(chǎn)品屬性

  • 56

  • 集成電路 (IC)

  • 數(shù)據(jù)采集 - 數(shù)字電位器

  • -

  • 256

  • 1M

  • 1

  • 標(biāo)準(zhǔn)值 30 ppm/°C

  • 易失

  • I²C（設(shè)備位址）

  • 2.7 V ~ 5.5 V，±2.3 V ~ 2.7 V

  • -40°C ~ 105°C

  • 表面貼裝

  • 14-SOIC（0.154"，3.90mm 寬）

  • 14-SOICN

  • 管件

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