AD8403ARZ10REEL Analog Devices, AD8403ARZ10REEL Datasheet

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AD8403ARZ10REEL

Manufacturer Part Number
AD8403ARZ10REEL
Description
SOP24
Manufacturer
Analog Devices
Datasheet

Specifications of AD8403ARZ10REEL

Date_code
05+
FEATURES
256-position variable resistance device
Replaces 1, 2, or 4 potentiometers
1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
Power shutdown—less than 5 µA
3-wire,SPI-compatible serial data input
10 MHz update data loading rate
2.7 V to 5.5 V single-supply operation
APPLICATIONS
Mechanical potentiometer replacement
Programmable filters, delays, time constants
Volume control, panning
Line impedance matching
Power supply adjustment
GENERAL DESCRIPTION
The AD8400/AD8402/AD8403 provide a single-, dual-, or
quad-channel, 256-position, digitally controlled variable resistor
(VR) device.
ment function as a mechanical potentiometer or variable
resistor. The AD8400 contains a single variable resistor in the
compact SOIC-8 package. The AD8402 contains two independent
variable resistors in space-saving SOIC-14 surface-mount
packages. The AD8403 contains four independent variable
resistors in 24-lead PDIP, SOIC, and TSSOP packages. Each
part contains a fixed resistor with a wiper contact that taps the
fixed resistor value at a point determined by the digital code
loaded into the controlling serial input register. The resistance
between the wiper and either endpoint of the fixed resistor
varies linearly with respect to the digital code transferred into
the VR latch. Each variable resistor 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 1 kΩ, 10 kΩ, 50 kΩ, or 100 kΩ has a ±1%
channel-to-channel matching tolerance with a nominal
temperature coefficient of 500 ppm/°C. A unique switching
circuit minimizes the high glitch inherent in traditional
switched resistor designs, avoiding any make-before-break
or break-before-make operation.
1
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.
The terms digital potentiometer, VR, and RDAC are used interchangeably.
1
These devices perform the same electronic adjust-
(continued on Page 3)
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
DGND
CLK
V
SDI
CS
DD
100
75
50
25
0
0
AD8403
AD8400/AD8402/AD8403
FUNCTIONAL BLOCK DIAGRAM
R
WA
Digital Potentiometers
D
A1, A0
CK
64
SELECT
SERIAL
LATCH
10-BIT
DAC
SDO
Figure 2. R
2
Q
RS
© 2005 Analog Devices, Inc. All rights reserved.
1
2
3
4
CODE (Decimal)
8
WA
Figure 1.
128
1-/2-/4-Channel
and R
LATCH
LATCH
CK RS
LATCH
CK RS
LATCH
CK RS
CK RS
8-BIT
8-BIT
8-BIT
8-BIT
WB
RS
vs. Code
8
8
8
8
192
RDAC1
RDAC2
RDAC3
RDAC4
SHDN
SHDN
SHDN
SHDN
SHDN
R
WB
www.analog.com
A1
W1
B1
AGND1
A2
W2
B2
AGND2
A3
W3
B3
AGND3
A4
W4
B4
AGND4
255

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