Features: ` Dual, Audio Log Taper Potentiometers
` Low THD+N and Crosstalk
` 5V Analog Supply (Independent of Digital Supply)
` 3V to 5V Digital Supply Range
` Potentiometer Settings Configurable as NV or Volatile
` Zero-Crossing Detector Eliminates Switching Noise
` Two User-Configurable Attenuation Options
` Configuration Option 1: 63 Positions Provide 1dB Attenuation Steps from 0dB to -62dB Plus Mute
` Configuration Option 2: (Software-Compatible with the DS1808): 33 Positions Plus Mute as Follows
Positions 012: 1dB per Step for 12 Steps
Positions 1324: 2dB per Step for 12 Steps
Positions 2532: 3dB per Step for 8 Steps
` I2C*-Compatible Serial Interface
` Three Address Pins Allow Up to 8 Devices on I2C Bus
` 45k Potentiometer End-to-End Resistance
` Industrial Temperature Range (-40°C to +85°C)
` 16-Pin TSSOP or SO PackageApplicationNotebook and PC Audio
Portable Audio Equipment
Car Stereo
Consumer Audio/VideoPinout
SpecificationsVoltage on VDD, SDA, and SCL Relative to GND ...-0.5V to +6.0V
Voltage on A2, A1, A0, and CE Relative
to GND.................-0.5V to (VDD + 0.5V), not to exceed +6.0V
Voltage on VCC Relative to GND...........................-0.5V to +6.0V
Voltage on H1, H0, W1, W0, L1, and L0 Relative
to GND...............................................................-0.5V to +6.0V
Maximum Resistor Current ................................................±3mA
Operating Temperature Range ........................-40°C to +85°C
Programming Temperature Range ......................0°C to +70°C
Storage Temperature Range .........................-55°C to +125°C
Soldering Temperature.....................See J-STD-020 Specification
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DescriptionThe DS1881 is a dual, nonvolatile (NV) digital potentiometer designed to operate in audio systems that require 5V signal levels. The potentiometer settings can be stored in EEPROM so that they are retained when the power is cycled. The DS1881 has separate supplies for the potentiometers (VCC) and the communication circuitry (VDD). For clickless/popless operation, a zero-crossing detector allows the wiper position to change when there is no voltage across the potentiometer. The device is also designed to minimize crosstalk, and the two digital potentiometers provide 0.5dB channel-to-channel matching to prevent volume differences between channels.Total harmonic distortion (THD) is also minimal as long as the wiper drives a high-impedance load.
Two attenuation configuration options provide optimum flexibility for the specific application. Configuration Option 1 provides 63 logarithmic tapered steps (0dB to -62dB, 1dB/step) plus a mute setting. Configuration Option 2 has 32 logarithmic steps plus mute and provides software compatibility with the DS1808. When Configuration Option 2 is used in combination with the 16-pin SO package, the DS1881 is both software and pin compatible with the DS1808 in 5V applications.
DS1881 Data Sheet
