AS1507 Digital Potentiometer IC
Dual 256-Tap Digital Potentiometer with SPI Interface and High Endurance EEPROM
Description
The AS1507 is a linear, dual 256-tap digital potentiometer specifically designed to replace discrete/mechanical potentiometers and is ideal for applications requiring a low-temperature-coefficient variable resistor.
The device is controlled via a 3-wire SPI-compatible interface and features an internal EEPROM for storing wiper positions.
Several device variants are available differentiated by the following end-to-end resistance:
| Model | End-to-End Resistance (kΩ) |
| AS1507-10 | 10 |
| AS1507-50 | 50 |
| AS1507-100 | 100 |
The 3-wire SPI-compatible serial interface allows communication at data rates up to 5MHz.The internal EEPROM stores the last wiper position for initialization during power-up and a low-power standby mode.
The devices are available in an TQFN 3x3mm 16-pin package.
Key Features
- High Endurance: EEPROM up to 10M cycles
- High Reliability: EEPROM up to 150 years data retention @ 85ºC
- Wiper Position Retained in EEPROM and loaded at Power-Up
- 256 Tap Positions
- ±0.5LSB DNL in Voltage Divider Mode
- ±0.5LSB INL in Voltage Divider Mode
- End-to-End Resistance: 10/50/100 kΩ
- Low End-to-End Resistance Temperature Coefficient: 90ppm/ºC
- Low-Power Standby Mode: 100nA
- 5MHz SPI-Compatible Serial Interface
- Single-Supply Operation: +2.7V to +5.5V
- TQFN 3x3mm 16-pin Package
Applications
The device is ideal for mechanical potentiometer replacement, low-drift programmable gain amplifiers, audio volume control, LCD contrast control, and low-drift programmable filters.
Block diagram for AS1507 Digital Potentiometer IC
AS1507 Dual 256-Tap DigiPot SPI EEPROM Block Diagram