Data Sheet AS1500/1/2/3
Digital Potentiometer
AS1500/AS1501/AS1502/AS1503
Key Features
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DATASHEET
PRELIMINARY FACT SHEET
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256-Position
Available in four Resistance values
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AS1500 resistance 10kOhms
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AS1501 resistance 20kOhms
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AS1502 resistance 50kOhms
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AS1503 resistance 100kOhms
Power Shutdown —Less than 1 µA
3-Wire SPI-Compatible Serial Data Input
10 MHz Update Data Loading Rate
2.7 V to 5.5 V Single-Supply Operation
Temperature Range –40°C to +125°C
Package SO-8
Compatible to AD8400
programming rates up to 10MHz. The AS1500 is available in
four different resistor values. The AS1500 incorporates a
10kΩ, the AS1501 a 20kΩ, the AS1502 a 50kΩ and the
AS1503 a 100kΩ fixed resistor. The wiper contact taps the
fixed resistor at points determined by the 8-bit digital code
word. The resistance between the wiper and the endpoint of
the resistor is linear. The switching action is performed in a
way that no glitches occur. Furthermore the AS150x product
family includes a shutdown mode, where it consumes less
than 1µA. The AS150x is available in an 8-pin SOIC
package. All parts are guaranteed to operate over the
extended industrial temperature range of –40°C to +125°C.
Applications
General Description
The AS1500 is a digital potentiometer with 256
programmable steps. The values of the resistor can be
controlled via 3 wire serial interface capable to handle
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Line Impedance Matching
Volume Control, Panning
Mechanical Potentiometer Replacement
Power Supply Adjustment
Programmable Filters, Delays, Time Constants
VDD
B 1
GND 2
CSN 3
SDI
4
8
A
W
VDD
CK
AS150x
Top View
SDI
CK
CSN
A
10 Bit
Serial
Latch
8
8-Bit
Latch
8
W
B
7
6
5
AS1500
GND
Figure 1
Pinout andfunctional Block Diagram of Digital Potentiometer AS150x family
Revision 1.0, Oct 2004
Page 1 of 8
AMSCO [ AUSTRIAMICROSYSTEMS AG ]
