MAX98365 Amplifier

Product Highlights > MAX98365 Amplifier

            MAX98365 Amplifier
                    Analog Devices' MAX98365 14 V plug-and-play digital Class-D amplifier features a highly flexible digital audio interface
    

ADI's MAX98365 is a digital input Class-D amplifier that provides excellent Class-AB audio performance with Class-D efficiency. The digital audio interface automatically recognizes different pulse code modulation (PCM) and time division multiplexed (TDM) clocking schemes, eliminating the need for I²C programming; simply supply power, LRCLK, BCLK, and digital audio to generate sound. Furthermore, a novel pinout allows users to use the cost-effective wafer-level package (WLP) without needing expensive in-pad vias. A wide 3 V to 14 V supply range allows the device to deliver 13.8 W into an 8 Ω load.

The digital audio interface is highly flexible. The devices support I2S, left-justified, and 8-channel TDM data formats. The digital audio interface accepts 8 kHz, 16 kHz, 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, and 192 kHz 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 1.2 V and 1.8 V logic. The devices can tolerate logic input voltages up to 5.5 V.

The MAX98365 evaluation system (EV system) is a fully assembled and tested system that evaluates the MAX98365A/B/C/D mono Class-D audio amplifier. The EV system consists of the MAX98365 development board (DEV board), Maxim’s Audio Interface Board III (AUDINT3), and a USB cable.

Features

Simple plug-and-play design
Wide amplifier supply range (3 V to 14 V)
13.8 W output power into 8 Ω at 14 V
17.6 W output power into 6 Ω at 14 V
30 mW quiescent power
1 ms turn-on time (for MAX98365A and MAX98365B)
92.7% efficiency (7.0 W into R_L=8 Ω, PV_DD=12 V)
22 µV_RMS output noise
111.5 dB dynamic range
-85 dB THD+N at 1 kHz

No MCLK required
Sample rates of 8 kHz to 192 kHz
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 0.5 µA 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 (1.21 mm x 1.78 mm, 0.4 mm pitch)