The MAX5440 is an integrated circuit from Texas Instruments. It is a volume controller that supports 40kΩ resistors and has an LED indicator. It can be used for stereo volume control, desktop speakers, multimedia docking stations, set-top boxes and automotive back-seat multimedia.
The MAX5440 dual digital potentiometer provides 40 kΩ end‑to‑end resistance with 32 logarithmically spaced tap points per channel. It includes an integrated bias voltage generator, debounced up/down inputs for a rotary encoder, mute and mode functions, and a five‑segment LED bar‑graph for volume or balance indication.
Designed for stereo volume control in applications such as desktop speakers, multimedia docking stations, set‑top boxes and automotive back‑seat multimedia, the device operates from –40 °C to +85 °C and supports a single‑supply voltage of +2.7 V to +5.5 V. Pin‑out is provided in a 24‑pin SSOP package.
| End‑to‑End Resistance | 40 kΩ (typ) |
|---|---|
| Tap Points | 32 log‑spaced taps per potentiometer |
| Supply Voltage | +2.7 V to +5.5 V |
| Operating Temperature Range | -40 °C to +85 °C |
| Integrated Bias Generator | Provides (Vpp + Vss)/2 bias voltage |
| Mute Attenuation | -90 dB (typ) |
| LED Indicator | Five‑segment LED volume/balance indicator |
The device operates from +2.7 V to +5.5 V supply voltage.
Each potentiometer has 32 logarithmically spaced tap points.
The mute function provides a typical attenuation of -90 dB.
It is specified for operation from –40 °C to +85 °C.