The DS4420 is a fully differential, I2C‑controlled programmable‑gain amplifier designed for audio applications. It operates from a single 5 V supply, supports a gain range of –35 dB to +25 dB in 3 dB steps, and can drive low‑impedance loads.
The device is offered in a 3 mm × 3 mm × 0.8 mm TDFN package and includes separate analog and digital supply pins. Detailed electrical characteristics, pin descriptions, I2C timing diagrams, and application notes are provided for designers.
| Supply Voltage (Vcc) | 4.5 V – 5.5 V |
|---|---|
| Gain Range | -35 dB to +25 dB |
| Bandwidth (all gain settings) | 20 kHz |
| Resistive Load Range | 50 Ω – 50 kΩ |
| Input Resistance (active mode) | 49 kΩ – 60 kΩ |
| I2C Clock Frequency | up to 400 kHz |
The amplifier provides a gain from –35 dB to +25 dB.
The recommended digital supply voltage is between 4.5 V and 5.5 V.