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AD5241BR1M-REEL7 Datasheet

  • AD5241BR1M-REEL7

  • DIGITAL POTENTIOMETER|SOP|14PIN|PLASTIC

  • 16頁

  • ETC

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a
FEATURES
256 Position
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 Reaback Capability
Extra Programmable Logic Outputs
APPLICATIONS
Multimedia, Video and Audio
Communications
Mechanical Potentiometer Replacement
Instrumentation: Gain, Offset Adjustment
Programmable Voltage-to-Current Conversion
Line Impedance Matching
GENERAL DESCRIPTION
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
The AD5241/AD5242 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. For
AD5242, the fixed A-to-B terminal resistance of 10 k鈩? 100 k鈩?/div>
or 1 M鈩?has a 1% channel-to-channel matching tolerance.
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 is available in surface-mount (SO-14/-16)
packages and, for ultracompact solutions, TSSOP-14/-16 pack-
ages. All parts are guaranteed to operate over the extended
industrial temperature range of 鈥?0擄C to +85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.
,
SHDN
V
DD
V
SS
ADDR
DECODE
REGISTER
RDAC
REGISTER 1
RDAC
REGISTER 2
AD5242
1
SDA
SCL
GND
8
PWR-ON
RESET
SERIAL INPUT REGISTER
AD0
AD1
*Nonvolatile
digital potentiometer.
I
2
C is a registered trademark of Philips Corporation.
REV. A
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

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