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MAX98360A/B/C/D
Tiny, Cost-Effective, Plug-and-Play
Digital Class-D Amplifier
General Description
Benefits and Features
The MAX98360A/B/C/D is an easy-to-use, low-cost, digital
pulse-code modulation (PCM) input Class-D amplifier that
provides industry-leading, Class-AB audio performance
with Class-D efficiency. The digital audio interface au-
tomatically recognizes different PCM and TDM clocking
● Simple Plug-and-Play Design
● Single-Supply Operation (2.5V to 5.5V)
● 3.2W Output Power into 4Ω at 5V
● 2.2mA Quiescent Current
● 1ms Turn-On Time (for MAX98360A and
MAX98360B)
2
schemes which eliminates the need for I C programming.
Simply supply power, LRCLK, BCLK, and digital audio to
generate audio. Furthermore, a novel pinout allows cus-
tomers to use the cost-effective WLP package with no
need for expensive vias.
● 92% Efficiency (R = 8Ω, THD+N = 10%)
L
● 10μV
Output Noise
RMS
● 110dB Dynamic Range
● Low 0.009% THD+N at 1kHz
● No MCLK Required
● Sample Rates of 8kHz to 96kHz
● Supports Left, Right, or (Left/2 + Right/2) Output in I S
and Left-Justified Modes
● Sophisticated Edge Rate Control Enables Filterless
Class-D Outputs
● 81dB PSRR at 217Hz
● 1.5μA Standby Current Allows Elimination of GPIO for
EN Pin
● Low RF Susceptibility Rejects TDMA Noise from GSM
Radios
The digital audio interface is highly flexible. The devices
2
support I S, left-justified, and 8-channel time division mul-
2
tiplexed (TDM) data formats. The digital audio interface
accepts 8kHz, 16kHz, 32kHz, 44.1kHz, 48kHz, 88.2kHz,
and 96kHz sample rates. Data words can be 16-bit, 24-bit,
2
or 32-bit in I S and left-justified modes and 16-bit or 32-bit
in TDM mode.
Digital audio interface input thresholds are ideal for inter-
facing to 1.2V and 1.8V logic. The devices can tolerate
logic input voltages up to 5.5V.
The MAX98360A and MAX98360B have fast 1ms turn-on
times while the MAX98360C and MAX98360D ramp the
volume over 13ms during turn-on and turn-off.
● Class-D Switching Frequency Trimmed to 5% for
Better EMI Planning
● Extensive Click-and-Pop Reduction Circuitry
● Robust Short-Circuit and Thermal Protection
● Available in Space-Saving Package: 9-Pin WLP
(0.4mm Pitch) or 10-Pin FC2QFN (0.5mm Pitch)
The devices eliminate the need for the external MCLK sig-
nal that is typically used for PCM communication. This re-
duces EMI and possible board coupling issues in addition
to reducing the size and pin count. The devices also fea-
ture a very high wideband jitter tolerance (12ns, typ) on
BCLK and LRCLK to provide robust operation.
2
● 3.69mm Solution Size for WLP With A Single Bypass
Capacitor
Ordering Information appears at end of data sheet.
Active emissions-limiting, edge-rate limiting, and over-
shoot 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.
Simplified Block Diagram
V
DD
EN
GAIN_SLOT
DAI0
CONTROL
MAX98360
The devices are specified over the -40°C to +85°C tem-
perature range.
OUTP
OUTN
DAI1
PCM
INTERFACE
DAC
CLASS-D AMPLIFIER
DAI2
Applications
● Single Li-ion Cell/5V Devices
● Smart Speakers
GND
● Notebook Computers
● IoT Devices
● Gaming Devices (Audio and Haptics)
● Smartphones
● Tablets
● Cameras
19-100655; Rev 2; 3/20
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