AS1500/AS1501/AS1502/AS1503

Digita l Potentiometer

Dat a Sh eet

www.austriamicrosystems.com

Revision 1.01

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1 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 10k

Ω, the AS1501 a 20kΩ,

the AS1502 a 50k

Ω 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.

The AS150x is available in an 8-pin SOIC package. All

parts are guaranteed to operate over the extended

industrial temperature range of –40º to +125º.

2 Key Features

256 - Taps

Available in four Resistance values

- AS1500 resistance 10k

Ω

- AS1501 resistance 20k

Ω

- AS1502 resistance 50k

Ω

- AS1503 resistance 100k

Ω

Standby current - Less than 1 µA

3-Wire Serial Data Interface

10 MHz Update Data Loading Rate

2.7 V to 5.5 V Single-Supply Operation

Temperature Range –40º to +125º

8-pin SOIC Package

3 Applications

The AS1500 is ideal for volume controls in TV sets and

audio systems, and applications that require line

impedance matching, programmable filters or power

supply adjustment. The AS1500 can also be designed in

as a replacement for mechanical potentiometers.

Figure 1. Application Diagram

8

8

A

W

B

10 Bit

Serial

Latch

8-Bit

Latch

GND

SDI

CK

CSN