Datasheet > MAX98357B

MAX98357B

更新时间： 2024-11-08 01:16:11

品牌	Logo	应用领域
美信 - MAXIM		PC
页数	文件大小	规格书
38页	2179K
描述
PCM Input Class D Audio Power Amplifiers

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MAX98357B 数据手册

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MAX98357A/MAX98357B

PCM Input Class D Audio Power Amplifiers

General Description

Features

The MAX98357A/MAX98357B are digital pulse-code

modulation (PCM) input Class D power amplifiers that

provide Class AB audio performance with Class D effi-

ciency. These ICs offer five selectable gain settings

(3dB, 6dB, 9dB, 12dB, and 15dB) in I²S/left-justified

mode set by a single gain select input and a fixed 12dB

gain in TDM mode.

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

S 3.2W Output Power into 4I at 5V

S 2.4mA Quiescent Current

S 92% Efficiency (R = 8I, P

= 1W)

OUT

S 25µV

Output Noise (A = 15dB)

RMS

The digital audio interface is highly flexible with the

MAX98357A supporting I²S data and the MAX98357B sup-

porting 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 operate using

16/24/32-bit data for I²S and left-justified 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 reduces EMI and possible

board coupling issues in addition to reducing the size and

pin count of the ICs.

S Low 0.015% THD+N at 1kHz

S No MCLK Required

S Sample Rates of 8kHz to 96kHz

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

S Sophisticated Edge Rate Control Enables

Filterless Class D Outputs

S 77dB PSRR at 1kHz

S Low RF Susceptibility Rejects TDMA

Noise from GSM Radios

S Extensive Click-and-Pop Reduction Circuitry

S Robust Short-Circuit and Thermal Protection

The ICs also feature a very high wideband jitter tolerance

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

S Available in Space-Saving Packages:

1.345mm x 1.435mm WLP (0.4mm Pitch)

and 3mm x 3mm TQFN

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.

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 -40NC to +85NC

temperature range.

Simplified Block Diagram

Applications

SHUTDOWN

AND

CHANNEL

SELECT

GAIN

CONTROL

Notebook and Netbook Computers

Cellular Phones

MAX98357A

MAX98357B

Tablets

CLASS D

OUTPUT

STAGE

DIGITAL

AUDIO

INTERFACE

PCM

INPUT

DAC

Ordering Information appears at end of data sheet.

Functional Diagram appears at end of data sheet.

For related parts and recommended products to use with this part,

refer to www.maximintegrated.com/MAX98357A.related.

For pricing, delivery, and ordering information, please contact Maxim Direct at

1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.

19-6779; Rev 2; 8/14

12 3 4 5 6 7...38

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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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