Data Sheet AS1500/1/2/3
Revision 1.0, Oct 2004 Page 1 of 8
Key Features
- 256-Position
- Available in four Resistance values
- AS1500 resistance 10kOhms
- AS1501 resistance 20kOhms
- AS1502 resistance 50kOhms
- 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
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
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
- Line Impedance Matching
- Volume Control, Panning
- Mechanical Potentiometer Replacement
- Power Supply Adjustment
- Programmable Filters, Delays, Time Constants
Figure 1 Pinout andfunctional Block Diagram of Digital Potentiometer AS150x family
PRELIMINARY FACT SHEET
Digital Potentiometer
AS1500/AS1501/AS1502/AS1503
DATASHEET
8-Bit
Latch
10 Bit
Serial
Latch
8 8
SDI
CK
CSN
A
W
B
VDD
GND
AS1500
W
VDD
GND
CSN
7
6
2
3
AS150x
Top View
CK
AB
SDI
1
4
8
5