MAX9725EETC

更新时间： 2024-11-03 12:05:31

品牌	Logo	应用领域
美信 - MAXIM		放大器
页数	文件大小	规格书
17页	332K
描述
1V, Low-Power, DirectDrive, Stereo Headphone Amplifier with Shutdown

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MAX9725EETC 数据手册

19-3465; Rev 4; 3/09

1V, Low-Power, DirectDrive, Stereo Headphone

Amplifier with Shutdown

MAX9725

General Description

Features

♦ Low Quiescent Current

2.1mA (MAX9725A–MAX9725D)

2.3mA (MAX9725E)

The MAX9725A–MAX9725D fixed-gain, stereo head-

phone amplifiers are ideal for portable equipment where

board space is at a premium. The MAX9725E offers the

flexibility to adjust the gain with external input and feed-

back resistors. The MAX9725A–MAX9725E use a unique

DirectDrive architecture to produce a ground-referenced

output from a single supply, eliminating the need for large

DC-blocking capacitors, saving cost, board space, and

component height. Fixed gains of -2V/V (MAX9725A),

-1.5V/V (MAX9725B), -1V/V (MAX9725C), and -4V/V

(MAX9725D) further reduce external component count.

The adjustable gain of the MAX9725E DirectDrive head-

phone amplifier allows for any gain down to -1V/V using

external resistors.

♦ Single-Cell, 0.9V to 1.8V Single-Supply Operation

♦ Fixed Gain Eliminates External Feedback Network

MAX9725A: -2V/V

MAX9725B: -1.5V/V

MAX9725C: -1V/V

MAX9725D: -4V/V

♦ Adjustable Gain with External Input and Feedback

Resistors

MAX9725E: Minimum Stable Gain of -1V/V

♦ Ground-Referenced Outputs Eliminate DC Bias

♦ No Degradation of Low-Frequency Response Due

to Output Capacitors

♦ 20mW per Channel into 32Ω

♦ Low 0.006% THD+N

♦ High PSRR (80dB at 1kHz)

♦ Integrated Click-and-Pop Suppression

♦ Low-Power Shutdown Control

♦ Short-Circuit Protection

The MAX9725 delivers up to 20mW per channel into a

32Ω load and achieves 0.006% THD+N. An 80dB at 1kHz

power-supply rejection ratio (PSRR) allows the MAX9725

to operate from noisy digital supplies without an additional

linear regulator. The MAX9725 includes 8kV ESD protec-

tion on the headphone output. Comprehensive click-and-

pop circuitry suppresses audible clicks and pops at

startup and shutdown. A low-power shutdown mode

reduces supply current to 0.6µA (typ).

The MAX9725 operates from a single 0.9V to 1.8V supply,

allowing the device to be powered directly from a single

AA or AAA battery. The MAX9725 consumes only

2.1mA of supply current, provides short-circuit protection,

and is specified over the extended -40°C to +85°C tem-

perature range. The MAX9725 is available in a tiny

(1.54mm x 2.02mm x 0.6mm) 12-bump chip-scale

package (UCSP™) and a 12-pin thin QFN package

(4mm x 4mm x 0.8mm).

♦

8kV ESD-Protected Amplifier Outputs

♦ Available in Space-Saving Packages

12-Bump UCSP (1.54mm x 2.02mm x 0.6mm)

12-Pin Thin QFN (4mm x 4mm x 0.8mm)

Block Diagrams

SINGLE

1.5V CELL

AA OR AAA

BATTERY

MAX9725A–MAX9725D

Applications

DirectDrive OUTPUTS

ELIMINATE DC-BLOCKING

CAPACITORS.

MP3 Players

Cellular Phones

PDAs

Smart Phones

INL

Portable Audio Equipment

OUTL

Ordering Information

C1P

C1N

INVERTING

CHARGE PUMP

TOP

MARK

GAIN

(V/V)

PART

PIN-PACKAGE

MAX9725AEBC+TG45

MAX9725AETC+

12 UCSP

+ACK

+AAEW

+ACL

-2

12 TQFN-EP*

12 UCSP

OUTR

INR

MAX9725BEBC+TG45

-1.5

Ordering Information continued at end of data sheet.

Note: All devices are specified over the -40°C to +85°C operating

temperature range.

SGND

PGND

+Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

*EP = Exposed pad.

UCSP is a trademark of Maxim Integrated Products, Inc.

Block Diagrams continued at end of data sheet.

Pin Configurations appear at end of data sheet.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...17

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与MAX9725EETC相关器件

型号	品牌	获取价格	描述	数据表
MAX9725EEVKIT	MAXIM	获取价格	Fully Assembled and Tested
MAX9725EEVKIT+	MAXIM	获取价格	Fully Assembled and Tested
MAX9726	MAXIM	获取价格	DirectDrive, Headphone Amplifier with BassMax, I2C, Volume and Gain Control
MAX9726AEBP+T	ROCHESTER	获取价格	0.124W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA20, 2 X 2.50 MM, 0.62 MM HIEGHT, ROHS COMPLIANT, U
MAX9726AEBPT	MAXIM	获取价格	DirectDrive, Headphone Amplifier with BassMax, I2C, Volume and Gain Control
MAX9726AETP	MAXIM	获取价格	DirectDrive, Headphone Amplifier with BassMax, I2C, Volume and Gain Control
MAX9726AETP+T	MAXIM	获取价格	Audio Amplifier, 0.124W, 2 Channel(s), 1 Func, BICMOS, 4 X 4 MM, 0.80 MM HIEGHT, ROHS COMP
MAX9726BEBP+T	MAXIM	获取价格	Audio Amplifier, 0.124W, 2 Channel(s), 1 Func, BICMOS, PBGA20, 2 X 2.50 MM, 0.62 MM HIEGHT
MAX9726BEBP+T	ROCHESTER	获取价格	0.124W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA20, 2 X 2.50 MM, 0.62 MM HIEGHT, ROHS COMPLIANT, U
MAX9726BEBPT	MAXIM	获取价格	DirectDrive, Headphone Amplifier with BassMax, I2C, Volume and Gain Control

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