max9770euit Maxim Integrated Products, Inc., max9770euit Datasheet

max9770euit

Manufacturer Part Number

max9770euit

Description

1.2w Low-emi, Filterless, Mono Class D Amplifier With Stereo Directdrive Headphone Amplifiers

Manufacturer

Maxim Integrated Products, Inc.

Datasheet

1.MAX9770EUIT.pdf (26 pages)

Current page: 1 of 26
Download datasheet (613Kb)

The MAX9770/MAX9772 combine a mono, filterless,

Class D speaker amplifier and stereo DirectDrive

headphone amplifiers in a single device. The MAX9770/

MAX9772 operate from a single 2.5V to 5.5V supply

and include features that reduce external component

count, system cost, board space, and offer improved

audio reproduction.

The speaker amplifiers make use of Maxim’s patented

Class D architecture, providing Class AB performance

with Class D efficiency, conserving board space, and

extending battery life. The speaker amplifiers deliver

1.2W into an 8Ω load while offering efficiencies above

85%. A spread-spectrum modulation scheme reduces

radiated emissions caused by the modulation frequency.

Furthermore, the MAX9770/MAX9772 oscillators can be

synchronized to an external clock through the SYNC

input, avoiding possible problem frequencies inside a

system. The speaker amplifier features THD+N as low as

0.025%, high 70dB PSRR, and SNR in excess of 90dB.

The headphone amplifiers feature Maxim’s patented

DirectDrive architecture that produces a ground-refer-

enced output from a single supply, eliminating the need

for large DC-blocking capacitors. The headphone ampli-

fiers deliver up to 80mW into a 16Ω load, feature low

0.015% THD+N, high 85dB PSRR, and ±8kV ESD-pro-

tected outputs. A headphone sense input detects the

presence of a headphone, and automatically configures

the amplifiers for either speaker or headphone mode.

The MAX9770/MAX9772 include internally set, logic-

selectable gain, and a comprehensive input mul-

tiplexer/mixer, allowing multiple audio sources to be

selected and for true mono reproduction of a stereo

source in speaker mode. Industry-leading click-and-pop

suppression eliminates audible transients during power

and shutdown cycles. A low-power shutdown mode

decreases supply current consumption to 0.1µA, further

extending battery life.

The MAX9770 is offered in space-saving, thermally effi-

cient 28-pin TQFN (5mm x 5mm x 0.8mm) and 28-pin

TSSOP packages, while the MAX9772 is offered in a

tiny (2.54mm x 2.54mm x 0.62mm) 25-bump chip-scale

package (UCSP™). The MAX9770/MAX9772 feature

thermal-overload and output short-circuit protection,

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

temperature range.

19-3134; Rev 1; 9/05

UCSP is a trademark of Maxim Integrated Products, Inc.

†U.S. Patent #7,061,327

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

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

1.2W, Low-EMI, Filterless, Mono Class D Amplifier

Cellular Phones

Compact Notebooks

with Stereo DirectDrive Headphone Amplifiers

________________________________________________________________ Maxim Integrated Products

General Description

EVALUATION KIT

AVAILABLE

PDAs

Applications

†

♦ 1.2W Filterless Class D Amplifiers Pass FCC

♦ Patented Spread-Spectrum Mode Offers 5dB EMI

♦ 80mW DirectDrive Headphone Amplifier

♦ High 85dB PSRR at 217Hz

♦ 85% Efficiency

♦ Low 0.015% THD+N

♦ Industry-Leading Click-and-Pop Suppression

♦ Integrated 2-Way Input Mixer/Multiplexer

♦ Integrated 3-Way Input Mixer/Multiplexer

♦ Logic-Adjustable Gain

♦ Short-Circuit and Thermal Protection

♦ Available in Space-Saving, Thermally Efficient

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

temperature range.

*EP = Exposed paddle.

Pin Configuration appears at end of data sheet.

MAX9770ETI+

MAX9770EUI

MAX9772EBA-T 5 x 5 UCSP

Denotes lead-free package.

Class B Radiated EMI Standards with 100mm of

Cable

Improvement over Conventional Methods

Eliminates Bulky DC-Blocking Capacitors

(MAX9772)

(MAX9770)

Packages

PART

MONO

IN2L*

IN2R*

IN1R

IN1L

*MAX9770 ONLY.

GAIN SEL

INPUT SEL

MUTE

SHDN

HPS

Simplified Block Diagram

PIN-

PACKAGE

28 TQFN-EP*

28 TSSOP

MAX9770/MAX9772

Ordering Information

CLASS

T2855N-1 2 stereo, 1 mono

CODE

U28-1

B25-1

PKG

2 stereo, 1 mono

1 stereo, 1 mono

HEADPHONE

DirectDrive

SELECTABLE

Features

STEREO

SPKR

(MONO)

INPUTS

Related parts for max9770euit

max9770euit Summary of contents

Page 1

... Cellular Phones PDAs Compact Notebooks UCSP is a trademark of Maxim Integrated Products, Inc. †U.S. Patent #7,061,327 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ...

Page 2

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers ABSOLUTE MAXIMUM RATINGS GND to PGND to CPGND......................................-0.3V to +0. CPV ..........................................-0.3V to +0. GND ...........................................................................+ ...

Page 3

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued) = 3.3V, GND = PGND = CPGND = 0V, SHDN = 3.3V 1µ CPV DD DD ...

Page 4

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued) = 3.3V, GND = PGND = CPGND = 0V, SHDN = 3.3V 1µ CPV DD DD ...

Page 5

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers (MAX9770 V = 3.3V 22Hz to 22kHz, GAIN1 = 1, GAIN2 = 0, spread-spectrum mode, headphone outputs in phase, unless DD otherwise noted.) TOTAL HARMONIC DISTORTION ...

Page 6

Page 7

Page 8

Page 9

Page 10

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers PIN TQFN TSSOP UCSP B5 B5* ...

Page 11

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers Detailed Description The MAX9770/MAX9772 combine mono 1.2W Class D speaker amplifiers and stereo 80mW DirectDrive head- phone amplifiers with integrated headphone sensing and comprehensive click-and-pop suppression. A mixer/multiplexer ...

Page 12

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers Operating Modes The switching frequency of the charge pump is 1/2 the switching frequency of the Class D amplifier, regard- less of the operating mode. When SYNC is ...

Page 13

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers V IN- V IN+ OUT- OUT+ t ON(MIN OUT+ OUT- Figure 2. MAX9770/MAX9772 Output with an Input Signal Applied (SSM Mode) 50.0 45.0 40.0 35.0 ...

Page 14

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers OUT- OUT+ V OUT OUT Figure 4. MAX9770/MAX9772 Output with No Signal Applied Maxim’s patented DirectDrive architecture uses a charge ...

Page 15

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers Table 2. MAX9770 Multiplexer/Mixer Settings SEL1 SEL2 SELM HPOUTL MUTE IN1L IN2L MONO ...

Page 16

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers Table 4. Gain Selection MAX9770 MAX9772 SPEAKER SPEAKER GAIN1 GAIN2 GAIN GAIN (dB) (dB 15 ...

Page 17

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers Applications Information Filterless Operation Traditional Class D amplifiers require an output filter to recover the audio signal from the amplifier’s output. The filters add cost, increase the solution ...

Page 18

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers Table 6. Suggested Capacitor Manufacturers SUPPLIER Taiyo Yuden TDK Charge-Pump Capacitor Selection Use capacitors with an ESR less than 100mΩ for opti- mum performance. Low-ESR ceramic capacitors mini- ...

Page 19

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers 16 (19) SYNC 0.47μF IN1L (28) LEFT-CHANNEL AUDIO INPUT 0.47μF IN1R (3) RIGHT-CHANNEL AUDIO INPUT ...

Page 20

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers D3 SYNC 0.47μF IN1L B1 LEFT-CHANNEL AUDIO INPUT 0.47μF IN1R B2 RIGHT-CHANNEL AUDIO INPUT 1μF MONO A1 MONO ...

Page 21

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers AUDIO DAC FM RADIO MODULE BASEBAND PROCESSOR *MAX9770 ONLY **SV C BIAS ______________________________________________________________________________________ 2.5V TO 5.5V 1μF V HPV 0.47μF IN1R IN1L 0.47μF MAX9770 MAX9772 ...

Page 22

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers TOP VIEW GND 1 IN2R 2 IN1R 3 BIAS MAX9770 HPOUTR 6 HPOUTL HPS 9 CPV 10 DD CPV 11 ...

Page 23

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ Package Information 23 ...

Page 24

Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 24 ______________________________________________________________________________________ Package Information (continued) ...

Page 25

Page 26

... Maxim reserves the right to change the circuitry and specifications without notice at any time. 26 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products Package Information (continued) PACKAGE OUTLINE, 5x5 UCSP 21-0096 is a registered trademark of Maxim Integrated Products, Inc ...

Related keywords

max9770euit datasheet
max9770euit data sheet
max9770euit pdf datasheet
max9770euit component
max9770euit part
max9770euit distributor
max9770euit RoHS
max9770euit datasheet download