MAX98365 Datasheet

• Simple Plug-and-Play Design
• Wide Amplifier Supply Range (3V to 14V)
• 13.8W Output Power into 8Ω at 14V
• 17.6W Output Power into 6Ω at 14V
• 30mW Quiescent Power
• 1ms Turn-On Time (for MAX98365A and MAX98365B)
• 92.7% Efficiency (7.0W into R_L = 8Ω, PVDD = 12V)
• 22µV_RMS Output Noise
• 111.5dB Dynamic Range
• -85dB THD+N at 1kHz
• No MCLK Required
• Sample Rates of 8kHz to 192kHz
• Supports Left, Right, or (Left/2 + Right/2) Output in I²S and Left-Justified Modes
• Sophisticated Edge Rate Control Enables Filterless Class-D Outputs
• Low 0.5µA Shutdown Current 
• Low RF Susceptibility Rejects TDMA Noise from GSM Radios
• Class-D Switching Frequency Trimmed to 6% for Better EMI Planning
• Extensive Click-and-Pop Reduction Circuitry
• Robust Short-Circuit and Thermal Protection
• Available in Space-Saving Package: 12 Bump, WLP (1.21mm x 1.78mm, 0.4mm Pitch)

• Smart Speakers
• Notebook Computers
• IoT Devices
• Gaming Devices (Audio and Haptics)
• Smartphones
• Tablets
• Cameras

The MAX98365 is an easy-to-use, low-cost, digital input Class-D amplifier that provides industry-leading, Class-AB audio performance with Class-D efficiency. The digital audio interface automatically recognizes different PCM and TDM clocking schemes which eliminates the need for I²C programming: Simply supply power, LRCLK, BCLK, and digital audio to generate sound. Furthermore, a novel pinout allows customers to use the cost-effective wafer-level package (WLP) with no need for expensive in-pad vias. A wide 3V to 14V supply range allows the device to deliver 13.8W into an 8Ω load.

The digital audio interface is highly flexible. The devices support I²S, left-justified, and 8-channel time division multiplexed (TDM) data formats. The digital audio interface accepts 8kHz, 16kHz, 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, and 192kHz sample rates. Data words can be 16-bit, 24-bit, or 32-bit in I²S and left-justified modes and 16-bit or 32-bit in TDM mode.

Digital audio interface input thresholds are ideal for interfacing to 1.2V and 1.8V logic. The devices can tolerate logic input voltages up to 5.5V.

The MAX98365A and MAX98365B have fast 1ms turn-on times while the MAX98365C and MAX98365D ramp the volume over 13ms during turn-on and turn-off.

The devices eliminate the need for the external MCLK signal that is typically used for PCM communication. This reduces EMI and possible board coupling issues in addition to reducing the size and pin count. The devices also feature a very high wideband jitter tolerance (12ns, typ) on BCLK and LRCLK to provide robust operation.

Active emissions-limiting, edge-rate limiting, and overshoot control circuitry greatly reduce EMI. A filterless spread-spectrum modulation scheme eliminates the need for output filtering found in traditional Class-D devices and reduces the component count of the solution.

The devices are specified over the -40°C to +85°C temperature range.