Datasheet > MAX9725_07

MAX9725_07

更新时间： 2024-11-03 04:41:31

品牌	Logo	应用领域
美信 - MAXIM		放大器
页数	文件大小	规格书
19页	528K
描述
1V, Low-Power, DirectDrive, Stereo Headphone Amplifier with Shutdown

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MAX9725_07 数据手册

19-3465; Rev 2; 11/07

1V, Low-Power, DirectDrive, Stereo Headphone

Amplifier with Shutdown

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,

patented DirectDrive^TMarchitecture 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 headphone 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).

♦ ±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)

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).

Block Diagrams

SINGLE

1.5V CELL

AA OR AAA

BATTERY

MAX9725A–MAX9725D

DirectDrive OUTPUTS

ELIMINATE DC-BLOCKING

CAPACITORS.

Applications

Smart Phones

INL

MP3 Players

Cellular Phones

PDAs

OUTL

Portable Audio Equipment

C1P

C1N

INVERTING

CHARGE PUMP

Ordering Information

PIN-

PACKAGE

PKG

CODE

TOP

MARK

GAIN

(V/V)

PART

MAX9725AEBC+T 12 UCSP-12

MAX9725AETC+ 12 TQFN-EP*

MAX9725BEBC+T 12 UCSP-12

Ordering Information continued at end of data sheet.

B12-1

+ACK

-2

OUTR

INR

T1244-4 +AAEW

B12-1 +ACL

-1.5

SGND

PGND

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

temperature range.

+Denotes a lead-free package. T = Tape and reel.

*EP = Exposed pad.

Block Diagrams continued at end of data sheet.

Pin Configurations appear at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

________________________________________________________________ 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...19

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与MAX9725_07相关器件

型号	品牌	获取价格	描述	数据表
MAX9725_V01	MAXIM	获取价格	1V, Low-Power, DirectDrive, Stereo Headphone Amplifier with Shutdown
MAX9725A	MAXIM	获取价格	Fully Assembled and Tested
MAX9725AEBC	MAXIM	获取价格	1V, Low-Power, DirectDrive, Stereo Headphone Amplifier with Shutdown
MAX9725AEBC+	ROCHESTER	获取价格	0.025W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA12, 1.54 X 2.02 MM, 0.60 MM HEIGHT, ROHS COMPLIANT
MAX9725AEBC+	MAXIM	获取价格	Fully Assembled and Tested
MAX9725AEBC+T	MAXIM	获取价格	1V, Low-Power, DirectDrive, Stereo Headphone Amplifier with Shutdown
MAX9725AEBC+T	ROCHESTER	获取价格	0.025W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA12, 1.54 X 2.02 MM, 0.60 MM HEIGHT, ROHS COMPLIANT
MAX9725AEBC+TG45	MAXIM	获取价格	1V, Low-Power, DirectDrive, Stereo Headphone Amplifier with Shutdown
MAX9725AEBC-T	MAXIM	获取价格	Audio Amplifier, 0.025W, 2 Channel(s), 1 Func, BICMOS, PBGA12, 1.54 X 2.02 MM, 0.60 MM HEI
MAX9725AEBC-T	ROCHESTER	获取价格	0.025W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA12, 1.54 X 2.02 MM, 0.60 MM HEIGHT, UCSP-12

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