MAX5440
RECOMMENDED FOR NEW DESIGNSStereo Volume Control with Rotary Encoder Interface
Rotary Encoder Interface Uses Gray Scale Encoding to Control Volume and Balance in Audio Applications
- Part Models
- 1
- 1ku List Price
- Starting From $2.42
Overview
- Logarithmic Taper Volume Control with (31) 2dB Steps
- Low-Power Wiper Buffers Provide 0.003% THD
- Single +2.7V to +5.5V or Dual ±2.7V Supply Voltage Operation
- Low 0.5µA Shutdown Supply Current
- Integrated Bias Voltage Generator
- Five-Segment LED Volume/Balance Indicator
- Clickless Switching
- 40kΩ End-to-End Fixed Resistance Value
- Mute Function Toggles to -90dB (typ)
- Power-On Reset to -12dBFS Wiper Position
The MAX5440 dual, 40kΩ logarithmic taper volume control features a debounced up/down interface for use with a simple rotary encoder without using a microcontroller (µC). Each potentiometer has 32 log-spaced tap points with a buffered wiper output and replaces mechanical potentiometers. An integrated bias generator provides the required ((VDD + VSS) / 2) bias voltage, eliminating the need for costly external op-amp circuits in unipolar audio applications. A mode-indicator LED output specifies volume or balance control. Five integrated LED drivers indicate volume level or balance settings, depending on the status of the mode indicator.
The MAX5440 includes debounced pushbutton inputs for mute and mode. The mute input allows a single pushbutton to change between volume control and the -90dB (typ) mute setting. The mode input toggles between volume and balance control. A click-and-pop suppression feature minimizes the audible noise generated by wiper transitions. The MAX5440 provides a nominal temperature coefficient of 35ppm/°C end-to-end and 5ppm/°C, ratiometrically. The MAX5440 is available in a 24-pin SSOP package and is specified for operation over the -40°C to +85°C extended temperature range.
Applications
- Desktop Speakers
- Multimedia Docking Stations
- Set-Top Boxes
- Stereo Volume Control
Documentation
Data Sheet 1
Technical Articles 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX5440EAG+ | 24-SSOP-5.3_MM |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Amplifier-Based Front Ends 1 | ||
| MAX5406 | Audio Processor with Pushbutton Interface | |
| Digital Potentiometers (DigiPOTs) 7 | ||
| MAX5456 | PRODUCTION | Stereo Audio Taper Potentiometers with Pushbutton Interface |
| MAX5457 | PRODUCTION | Stereo Audio Taper Potentiometers with Pushbutton Interface |
| MAX5407 | PRODUCTION | 32-Tap Audio Logarithmic Taper Digital Potentiometer |
| MAX5408 | PRODUCTION | Dual, Audio, Log Taper Digital Potentiometers |
| MAX5409 | LAST TIME BUY | Dual, Audio, Log Taper Digital Potentiometers |
| MAX5410 | PRODUCTION | Dual, Audio, Log Taper Digital Potentiometers |
| MAX5411 | PRODUCTION | Dual, Audio, Log Taper Digital Potentiometers |