austriamicrosystems

AS1506 Digital Potentiometer IC

256-Tap Digital Potentiometer with SPI Interface and High Endurance EEPROM

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Description

The AS1506 is a linear, 256-tap digital potentiometer specifically designed to replace discrete/mechanical potentiometers and is ideal for applications requiring a low-temperature-coefficient variable resistor, such as low-drift, programmable gain, and amplifier circuit configurations.

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 end-to-end resistance:

Model

End-to-End Resistance (kΩ)

AS1506-10

10

AS1506-50

50

AS1506-100

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 8-pin TDFN 3x3mm package.

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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: +2.7 to +5.5V
  • 8-pin TDFN 3x3mm Package
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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.

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Block diagram for AS1506 Digital Potentiometer IC

Print Block diagram for AS1506 Digital Potentiometer IC
AS1506 256-Tap DigiPot SPI EEPROM Block Diagram

AS1506 256-Tap DigiPot SPI EEPROM Block Diagram