AS1500_1 Datasheet, PDF (1/14 Pages) ams AG – Digital Potentiometer

AS1500/AS1501/AS1502/AS1503
Digital Potentiometer
Data Sheet
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 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.
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 10kΩ
- AS1501 resistance 20kΩ
- AS1502 resistance 50kΩ
- AS1503 resistance 100kΩ
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
VCC
A
SDI
CK
10 Bit
8 8-Bit
8
Serial
Latch
W
CSN
Latch
B
GND
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