AS1500 Datasheet, PDF (1/8 Pages) ams AG – Digital Potentiometer

Data Sheet AS1500/1/2/3
Digital Potentiometer
AS1500/AS1501/AS1502/AS1503
PRELIMINARY FDAACTTASSHHEEEETT
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
VDD
B1
GND 2
CSN 3
AS150x
Top View
8A
7W
6 VDD
SDI
10 Bit
8 8-Bit
8
CK
Serial
Latch
CSN
Latch
A
W
SDI 4
5 CK
B
AS1500
GND
Figure 1 Pinout andfunctional Block Diagram of Digital Potentiometer AS150x family
Revision 1.0, Oct 2004
Page 1 of 8