MAX9718/MAX9719 are single-supply differential dual-channel amplifiers from Maxim Integrated Products, with a working voltage range of 2.7V to 5.5V, providing 1.4W power (per channel) to 4Ω loads, with high PSRR, differential input, internal fixed gain, adjustable gain selection, low power shutdown mode, no click / pop sound, compatible with LM4895 pin, compatible with 1.8V logic levels.
The Maxim MAX9718 and MAX9719 are low‑cost differential audio power amplifiers designed for portable speaker applications. MAX9718 is a single‑channel device, while MAX9719 provides dual‑channel operation. Both devices deliver up to 1.4 W average output power per channel with low THD+N and high common‑mode rejection.
Key features include selectable internal gain (0 dB, 3 dB, 6 dB), 100 nA quiescent current in shutdown mode, and compatibility with LM4895 pin‑out. The amplifiers operate from a single supply of 2.7 V to 5.5 V and function over an ambient temperature range of –40 °C to +85 °C. This manual is written in Chinese.
| Supply Voltage Range | 0.3 V below VCC to +6 V |
|---|---|
| Output Power per Channel | 1.4 W average |
| Power‑Supply Rejection Ratio (PSRR) | -93 dB at 217 Hz |
| Operating Temperature Range | -40 °C to +85 °C |
The devices operate from 0.3 V below VCC up to +6 V.
Each channel can deliver up to 1.4 W average output power.