max9705aeub+ Maxim Integrated Products, Inc., max9705aeub+ Datasheet

max9705aeub+

Manufacturer Part Number

max9705aeub+

Description

Max9705 2.3w, Ultra-low-emi, Filterless, Class D Audio Amplifier

Manufacturer

Maxim Integrated Products, Inc.

Datasheet

1.MAX9705AEUB.pdf (20 pages)

Current page: 1 of 20
Download datasheet (623Kb)

The MAX9705 3rd-generation, ultra-low EMI, mono, Class

D audio power amplifier provides Class AB performance

with Class D efficiency. The MAX9705 delivers 2.3W into

a 4Ω load and offers efficiencies above 85%. Active

emissions limiting (AEL) circuitry greatly reduces EMI by

actively controlling the output FET gate transitions under

all possible transient output-voltage conditions. AEL pre-

vents high-frequency emissions resulting from conven-

tional Class D free-wheeling behavior in the presence of

an inductive load. Zero dead time (ZDT) technology

maintains state-of-the-art efficiency and THD+N perfor-

mance by allowing the output FETs to switch simultane-

ously without cross-conduction. A patented spread-

spectrum modulation scheme eliminates the need for out-

put filtering found in traditional Class D devices. These

design concepts reduce an application’s component

count and extend battery life.

The MAX9705 offers two modulation schemes: a fixed-

frequency (FFM) mode and a spread-spectrum (SSM)

mode that further reduces EMI-radiated emissions due to

the modulation frequency. The MAX9705 oscillator can

be synchronized to an external clock through the SYNC

input, allowing the switching frequency to be externally

defined. The SYNC input also allows multiple MAX9705s

to be cascaded and frequency locked, minimizing inter-

ference due to clock intermodulation. The device utilizes

a fully differential architecture, a full-bridged output, and

comprehensive click-and-pop suppression. The gain of

the MAX9705 is set internally (MAX9705A: 6dB,

MAX9705B: 12dB, MAX9705C: 15.6dB, MAX9705D:

20dB), further reducing external component count.

The MAX9705 is available in 10-pin TDFN (3mm x 3mm x

0.8mm), 10-pin µMAX

2mm x 0.6mm) packages. The MAX9705 is specified over

the extended -40°C to +85°C temperature range.

19-3405; Rev 1; 6/06

Selector Guide appears at end of data sheet.

µMAX is a registered trademark and UCSP is a trademark of

Maxim Integrated Products, Inc.

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.

Cellular Phones

PDAs

________________________________________________________________ Maxim Integrated Products

, and 12-bump UCSP™ (1.5mm x

General Description

MP3 Players

Portable Audio

Applications

2.3W, Ultra-Low-EMI, Filterless,

Class D Audio Amplifier

♦ Filterless Amplifier Passes FCC-Radiated

♦ Unique Spread-Spectrum Mode and Active

♦ Zero Dead Time (ZDT) H-Bridge Maintains State-

♦ Simple Master-Slave Setup for Stereo Operation

♦ Up to 90% Efficiency

♦ 2.3W into 4Ω (1% THD+N)

♦ Low 0.02% THD+N (P

♦ High PSRR (75dB at 217Hz)

♦ Integrated Click-and-Pop Suppression

♦ Low Quiescent Current (5.4mA)

♦ Low-Power Shutdown Mode (0.3µA)

♦ Short-Circuit and Thermal-Overload Protection

♦ Available in Thermally Efficient, Space-Saving

♦ Pin-for-Pin Compatible with the MAX9700 and

Ordering Information continued at end of data sheet.

+Denotes lead-free package.

MAX9705AETB+T

MAX9705AEUB+

MAX9705AEBC+T

MAX9705BETB+T

MAX9705BEUB+

MAX9705BEBC+T

Emissions Standards with 24in of Cable

Emissions Limiting (AEL) Achieves Better than

20dB Margin Under FCC Limits

of-the-Art Efficiency and THD+N

Packages

MAX9712

50.0

45.0

40.0

35.0

30.0

25.0

20.0

15.0

10.0

5.0

10-Pin TDFN (3mm x 3mm x 0.8mm)

10-Pin µMAX

12-Bump UCSP (1.5mm x 2mm x 0.6mm)

30.0

PART

60.0 80.0 100.0 120.0 140.0 160.0 180.0 200.0 220.0 240.0 260.0 280.0 300.0

EMI Spectrum Diagram

TEMP RANGE

-40

Ordering Information

MAXIM'S NEW ULTRA-LOW

OUTPUT SPECTRUM

C to +85

FREQUENCY (MHz)

OUT

= 1W, V

PIN-

PACKAGE

10 TDFN-10

10 µMAX

12 UCSP-12

10 TDFN-10

10 µMAX

12 UCSP-12

FCC EMI LIMIT

= 5.0V)

Features

MARK

TOP

ACH

ACG

ACY

ACX

—

Related parts for max9705aeub+

max9705aeub+ Summary of contents

Page 1

... Available in Thermally Efficient, Space-Saving Packages 10-Pin TDFN (3mm x 3mm x 0.8mm) 10-Pin µMAX 12-Bump UCSP (1.5mm x 2mm x 0.6mm) ♦ Pin-for-Pin Compatible with the MAX9700 and MAX9712 PART MAX9705AETB+T MAX9705AEUB+ MAX9705AEBC+T MAX9705BETB+T MAX9705BEUB+ MAX9705BEBC+T Ordering Information continued at end of data sheet. Applications +Denotes lead-free package. 50.0 45 ...

Page 2

Ultra-Low-EMI, Filterless, Class D Audio Amplifier ABSOLUTE MAXIMUM RATINGS V to GND.............................................................................. PGND .........................................................................6V DD GND to PGND .......................................................-0.3V to +0. ..........................................................-0.3V to +0. All Other Pins to GND.................................-0. ...

Page 3

ELECTRICAL CHARACTERISTICS (continued) = SHDN = 3.3V, GND = PGND = 0V, SYNC = GND (FFM unless otherwise noted. Typical values are at T MAX PARAMETER SYMBOL Rise/Fall Time t RISE ...

Page 4

Ultra-Low-EMI, Filterless, Class D Audio Amplifier (V = 3.3V, SYNC = V (SSM), differential input load condition apply to the MAX9705_ETB+T and MAX9705_EUB+ only.) TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER 100 f = 1kHz ...

Page 5

SYNC = V (SSM), differential input load condition apply to the MAX9705_ETB+T and MAX9705_EUB+ only.) TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY 100 4Ω ...

Page 6

Ultra-Low-EMI, Filterless, Class D Audio Amplifier (V = 3.3V, SYNC = V (SSM), differential input load condition apply to the MAX9705_ETB+T and MAX9705_EUB+ only.) OUTPUT POWER vs. SUPPLY VOLTAGE 2.0 1.8 1.6 1.4 THD+N = 10% ...

Page 7

SYNC = V (SSM), differential input load condition apply to the MAX9705_ETB+T and MAX9705_EUB+ only.) WIDEBAND OUTPUT SPECTRUM FIXED-FREQUENCY MODE 0 -20 -40 -60 -80 -100 R = 8Ω L -120 V = 5.0V ...

Page 8

Ultra-Low-EMI, Filterless, Class D Audio Amplifier 2.5V TO 5.5V 1µF 5 (B2) SHDN 2 1µF (B1) IN+ 3 1µF (C1) IN- PGND 7 (B3 UCSP BUMP. FIGURE SHOWS MAX9705 CONFIGURED FOR SPREAD-SPECTRUM OPERATION. 8 _______________________________________________________________________________________ 1 10 ...

Page 9

PIN BUMP NAME TDFN/µMAX UCSP SHDN SYNC 7 B3 PGND 8 A4 OUT Detailed Description The MAX9705 ultra-low-EMI, filterless, Class D audio power amplifier ...

Page 10

Ultra-Low-EMI, Filterless, Class D Audio Amplifier V IN- V IN+ OUT- OUT+ t ON(MIN OUT+ OUT- Figure 1. MAX9705 Outputs with an Input Signal Applied Table 1. Operating Modes SYNC INPUT MODE GND FFM with f ...

Page 11

V IN- V IN+ OUT- OUT+ t ON(MIN OUT+ OUT- Figure 2. MAX9705 Output with an Input Signal Applied (SSM Mode) space and system cost. Conventional Class D amplifiers output a 50% duty cycle square wave when ...

Page 12

Ultra-Low-EMI, Filterless, Class D Audio Amplifier OUT- OUT+ V OUT OUT Figure 3. MAX9705 Outputs with No Input Signal Click-and-Pop Suppression The MAX9705 features comprehensive click-and-pop suppression that eliminates audible transients ...

Page 13

Note that the single-ended voltage range of the MAX9705A This limits the achievable output P-P power for this device. Use higher gain versions (MAX9705B, MAX9705C, MAX9705D) if higher output power is desired in a single-ended application. The ...

Page 14

Ultra-Low-EMI, Filterless, Class D Audio Amplifier 1µF RIGHT-CHANNEL DIFFERENTIAL AUDIO INPUT 1µF LEFT-CHANNEL DIFFERENTIAL AUDIO INPUT Figure 6. Master-Slave Stereo Configuration TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER 100 V = 3.3V DD SLAVE DEVICE f = 1kHz ...

Page 15

... DD A IN+ SHDN PGND B IN- GND C UCSP ______________________________________________________________________________________ 2.3W, Ultra-Low-EMI, Filterless, Class D Audio Amplifier IN- MAX9705 IN+ Figure 9b. Improved Single-Ended Drive of MAX9705 Plus Volume MAX9705AETB MAX9705AEUB+ 9 OUT- MAX9705AEBC+T 8 OUT+ 7 PGND MAX9705BETB+T 6 SYNC MAX9705BEUB+ MAX9705BEBC+T MAX9705CETB+T MAX9705CEUB+ 6 MAX9705CEBC+T MAX9705DETB+T MAX9705DEUB+ MAX9705DEBC+T Ordering Information (continued) 5 PART ...

Page 16

Ultra-Low-EMI, Filterless, Class D Audio Amplifier V DD 0.1µF AUX_IN 2.2kΩ BIAS 2.2kΩ MAX4063 0.1µF IN+ IN- 0.1µF 16 ______________________________________________________________________________________ V DD 1µ IN+ MAX9705 IN- OUT SHDN CODEC/ OUT BASEBAND PROCESSOR SHDN 1µF INL 1µF MAX9722 ...

Page 17

For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ 2.3W, Ultra-Low-EMI, Filterless, Class D Audio Amplifier Package Information PACKAGE OUTLINE, 4x3 UCSP 1 F 21-0104 ...

Page 18

Ultra-Low-EMI, Filterless, Class D Audio Amplifier (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.) 18 ______________________________________________________________________________________ Package Information (continued) PACKAGE OUTLINE, 6,8,10 & 14L, ...

Page 19

For the latest package outline information go to www.maxim-ic.com/packages.) COMMON DIMENSIONS MIN. MAX. SYMBOL A 0.70 0.80 D 2.90 3.10 E 2.90 3.10 A1 0.00 0.05 ...

Page 20

... Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2006 Maxim Integrated Products Package Information (continued BOTTOM VIEW E2 GAGE PLANE A E1 α SIDE VIEW is a registered trademark of Maxim Integrated Products, Inc. INCHES MILLIMETERS DIM MIN MAX MIN MAX A - 0.043 - 1.10 A1 ...

Related keywords

max9705aeub+ datasheet
max9705aeub+ data sheet
max9705aeub+ pdf datasheet
max9705aeub+ component
max9705aeub+ part
max9705aeub+ distributor
max9705aeub+ RoHS
max9705aeub+ datasheet download