MAX9701
1.3W, Filterless, Stereo Class D Audio Power Amplifier
Part Details
- Spread-Spectrum Modulation Lowers Radiated Emissions
- Single-Supply Operation (2.5V to 5.5V)
- 1.3W Stereo Output (8Ω, VDD = 5V, THD+N = 1%)
- No LC Output Filter Required
- 87% Efficiency (RL = 8Ω, POUT = 1000mW)
- Less Than 0.1% THD+N
- High 80dB PSRR
- Fully Differential Inputs
- Integrated Click-and-Pop Suppression
- Typical Low Quiescent Current (9mA)
- Typical Low-Power Shutdown Mode (0.1µA)
- Short-Circuit and Thermal-Overload Protection
- Available in Thermally Efficient, Space-Saving Packages
- 24-Pin Thin QFN-EP (4mm x 4mm x 0.8mm)
- 20-Bump UCSP (2mm x 2.5mm x 0.6mm)
The MAX9701 stereo Class D audio power amplifier provides Class AB amplifier audio performance with the benefits of Class D efficiency, eliminating the need for a heatsink while extending battery life. The MAX9701 delivers up to 1.3W per channel into an 8Ω load while offering 87% efficiency. Maxim's next-generation, low-EMI modulation scheme allows the amplifier to operate without an external LC filter while still meeting FCC EMI emission levels.
The MAX9701 offers two modulation schemes: a fixed-frequency (FFM) mode, and a spread-spectrum (SSM) mode that reduces EMI-radiated emissions. The MAX9701 oscillator can be synchronized to an external clock through the SYNC input, allowing synchronization of multiple Maxim Class D amplifiers. The sync output (SYNC_OUT) can be used for a master-slave application where more channels are required. The MAX9701 features a fully differential architecture, a full bridge-tied load (BTL) output, and comprehensive click-and-pop suppression. The device features internally set gains of 0dB, 6dB, 12dB, and 18dB selected through two gain-select inputs, further reducing external component count.
The MAX9701 features high 80dB PSRR, less than 0.1% THD+N, and SNR in excess of 88dB. Short-circuit and thermal-overload protection prevent the device from being damaged during a fault condition. The MAX9701 is available in 24-pin thin QFN-EP (4mm x 4mm x 0.8mm) and 20-bump UCSP™ (2mm x 2.5mm x 0.6mm) packages. The MAX9701 is specified over the extended -40°C to +85°C temperature range.
Applications
- Automotive Multimedia
- Cell Phones
- Docking Stations
- Handheld Gaming Consoles
- MP3 Player
- Multimedia Phones
- PDA Phone
- PMP Player
- Smartphones
Documentation
Data Sheet 1
Reliability Data 1
Design Note 1
Technical Articles 2
This is the most up-to-date revision of the Data Sheet.
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