Datasheet > MAX98357B

MAX98357B

更新时间： 2024-11-08 14:57:51

品牌	Logo	应用领域
亚德诺 - ADI		放大器 PC
页数	文件大小	规格书
38页	4756K
描述
尺寸小，成本低，PCM输入的 D类放大器，兼具AB类性能

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MAX98357B 数据手册

EVALUATION KIT AVAILABLE

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MAX98357A/

MAX98357B

Tiny, Low-Cost, PCM Class D Amplifier with

Class AB Performance

General Description

Features

The MAX98357A/MAX98357B is an easy-to-use, low-cost,

digital pulse-code modulation (PCM) input Class D ampli-

fier that provides industry-leading Class AB audio perfor-

mance with Class D efficiency. The digital audio interface

automatically recognizes up to 35 different PCM and TDM

● Single-Supply Operation (2.5V to 5.5V)

● 3.2W Output Power into 4Ω at 5V

● 2.4mA Quiescent Current

● 92% Efficiency (R = 8Ω, P

= 1W)

OUT

Output Noise (A = 15dB)

● 22.8μV

clocking schemes which eliminates the need for I C pro-

RMS

gramming. Operation is further simplified by eliminating

the need for an external MCLK signal that is typically used

for PCM communication. Simply supply power, LRCLK,

BCLK, and digital audio to generate audio! Furthermore,

a novel pinout allows customers to use the cost-effective

WLP package with no need for expensive vias (refer

to Application Note 6643: Optimize Cost, Size, and

Performance with MAX98357 WLP for more information).

● Low 0.013% THD+N at 1kHz

● No MCLK Required

● Sample Rates of 8kHz to 96kHz

● Supports Left, Right, or (Left/2 + Right/2) Output

● Sophisticated Edge Rate Control Enables

Filterless Class D Outputs

● 77dB PSRR at 1kHz

The digital audio interface is highly flexible with the

● Low RF Susceptibility Rejects TDMA

MAX98357A supporting I S data and the MAX98357B

Noise from GSM Radios

supporting left-justified data. Both ICs support 8 channel

time division multiplexed (TDM) data. The digital audio

interface accepts specified sample rates between 8kHz

and 96kHz for all supported data formats. The ICs can

be configured to produce a left channel, right channel, or

(left/2 + right/2) output from the stereo input data. The ICs

● Extensive Click-and-Pop Reduction Circuitry

● Robust Short-Circuit and Thermal Protection

● Available in Space-Saving Packages:

1.345mm x 1.435mm WLP (0.4mm Pitch)

and 3mm x 3mm TQFN

operate using 16/24/32-bit data for I S and left-justified

● Solution Size with Single Bypass Capacitor is

modes as well as 16-bit or 32-bit data using TDM mode.

The ICs eliminate the need for the external MCLK signal

that is typically used for PCM communication. This reduc-

es EMI and possible board coupling issues in addition to

reducing the size and pin count of the ICs.

4.32mm²

Applications

● Single Li-ion Cell/5V Devices

● Smart Speakers

● Notebook Computers

● IoT Devices

● Gaming Devices (Audio and Haptics)

● Smartphones

The ICs also feature a very high wideband jitter toler-

ance (12ns typ) on BCLK and LRCLK to provide robust

operation.

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.

● Tablets

● Cameras

Simpliﬁed Block Diagram

The ICs are available in 9-pin WLP (1.345mm x 1.435mm

x 0.64mm) and 16-pin TQFN (3mm x 3mm x 0.75mm)

packages and are specified over the -40°C to +85°C tem-

perature range.

SHUTDOWN

AND

CHANNEL

SELECT

GAIN

CONTROL

MAX98357A

MAX98357B

Ordering Information appears at end of data sheet.

Functional Diagram appears at end of data sheet.

CLASS D

OUTPUT

STAGE

DIGITAL

AUDIO

INTERFACE

PCM

INPUT

DAC

19-6779; Rev 13; 7/19

12 3 4 5 6 7...38

中文翻译

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与MAX98357B相关器件

型号	品牌	获取价格	描述	数据表
MAX98357BETE+	MAXIM	获取价格	Tiny, Low-Cost, PCM Class D Amplifier with Class AB Performance
MAX98357BETE+T	MAXIM	获取价格	Tiny, Low-Cost, PCM Class D Amplifier with Class AB Performance
MAX98357BEWL+T	MAXIM	获取价格	Audio Amplifier, 1 Func, PBGA9,
MAX98357DEVTQFN	MAXIM	获取价格	MAX98357 Evaluation System (TQFN)
MAX98357DEVWLP	MAXIM	获取价格	MAX98357 Development Board/ Evaluation System (WLP)
MAX98358	MAXIM	获取价格	PDM Input Class D Audio Power Amplifier
MAX98358	ADI	获取价格	PDM输入D类音频功率放大器
MAX98358ETE	MAXIM	获取价格	PDM Input Class D Audio Power Amplifier
MAX98358ETE+	MAXIM	获取价格	PDM Input Class D Audio Power Amplifier
MAX98358EWL+T	MAXIM	获取价格	PDM Input Class D Audio Power Amplifier

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