max9712eub Maxim Integrated Products, Inc., max9712eub Datasheet

no-image

max9712eub

Manufacturer Part Number
max9712eub
Description
Max9712 500mw, Low Emi, Filterless, Class D Audio Amplifier
Manufacturer
Maxim Integrated Products, Inc.
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX9712EUB
Manufacturer:
MAXIM/美信
Quantity:
20 000
The MAX9712 mono class D audio power amplifier pro-
vides class AB amplifier performance with class D effi-
ciency, conserving board space, and extending battery
life. Using a class D architecture, the MAX9712 delivers
up to 500mW into an 8Ω load while offering efficiencies
above 85%. A patented, low EMI modulation scheme
renders the traditional class D output filter unnecessary.
The MAX9712 offers two modulation schemes: a fixed-
frequency (FFM) mode, and a spread-spectrum (SSM)
mode that reduces EMI-radiated emissions due to the
modulation frequency. Furthermore, the MAX9712 oscil-
lator can be synchronized to an external clock through
the SYNC input, allowing the switching frequency to be
user defined. The SYNC input also allows multiple
MAX9712s to be cascaded and frequency locked, mini-
mizing interference due to clock intermodulation. The
device utilizes a fully differential architecture, a full-
bridged output, and comprehensive click-and-pop sup-
pression. The gain is internally set to +4V/V, further
reducing external component count.
The MAX9712 features high 72dB PSRR, a low 0.01%
THD+N, and SNR in excess of 90dB. Short-circuit and
thermal-overload protection prevent the device from
damage during a fault condition. The MAX9712 is avail-
able in 10-pin TDFN (3mm
µMAX, and 12-bump UCSP™ (1.5mm
packages. The MAX9712 is specified over the extended
-40°C to +85°C temperature range.
19-2917; Rev 1; 1/04
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
DIFFERENTIAL
AUDIO INPUT
INPUT
SYNC
Simplified Block Diagram
________________________________________________________________ Maxim Integrated Products
OSCILLATOR
General Description
V
DD
3mm
MP3 Players
Portable Audio
AND H-BRIDGE
MODULATOR
MAX9712
Applications
0.8mm), 10-pin
2mm
500mW, Low EMI, Filterless,
0.6mm)
Class D Audio Amplifier
MAX9712ETB
MAX9712EUB
MAX9712EBC-T
Pin Configurations continued at end of data sheet.
Filterless Amplifier Passes FCC Radiated
Emissions Standards with 100mm of Cable
Unique Spread-Spectrum Mode Offers 5dB
Emissions Improvement Over Conventional
Methods
Optional External SYNC Input
Simple Master-Slave Setup for Stereo Operation
85% Efficiency
Up to 500mW into 8Ω
Low 0.01% THD+N
High PSRR (72dB at 217Hz)
Integrated Click-and-Pop Suppression
Low Quiescent Current (4mA)
Low-Power Shutdown Mode (0.1µA)
Short-Circuit and Thermal-Overload Protection
Available in Thermally Efficient, Space-Saving
Packages
TOP VIEW
10-Pin TDFN (3mm 3mm 0.8mm)
10-Pin µMAX
12-Bump UCSP (1.5mm
PART
SHDN
GND
V
IN+
IN-
DD
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
1
2
3
4
5
Ordering Information
TDFN/µMAX
MAX9712
Pin Configurations
2mm
PIN/BUMP-
PACKAGE
10 TDFN
10 µMAX
12 UCSP-12
10
9
8
7
6
PV
OUT-
OUT+
PGND
SYNC
0.6mm)
DD
Features
MARK
TOP
ABN
AAI
1

Related parts for max9712eub

max9712eub Summary of contents

Page 1

... Available in Thermally Efficient, Space-Saving Packages 10-Pin TDFN (3mm 3mm 0.8mm) 10-Pin µMAX 12-Bump UCSP (1.5mm 0.8mm), 10-pin 2mm 0.6mm) Applications PART MAX9712ETB MAX9712EUB MAX9712EBC-T TOP VIEW Pin Configurations continued at end of data sheet. Features 2mm 0.6mm) Ordering Information PIN/BUMP- TEMP RANGE PACKAGE MARK -40° ...

Page 2

Low EMI, Filterless, Class D Audio Amplifier ABSOLUTE MAXIMUM RATINGS V to GND.............................................................................. PGND .........................................................................6V DD GND to PGND .......................................................-0.3V to +0.3V All Other Pins to GND.................................-0. Continuous Current Into/Out of PV /PGND/OUT_ ........±600mA ...

Page 3

ELECTRICAL CHARACTERISTICS (continued) = SHDN = 3.3V, GND = PGND = 0V, SYNC = GND (FFM unless otherwise noted. Typical values are at T MIN MAX PARAMETER SYMBOL Signal-to-Noise Ratio ...

Page 4

Low EMI, Filterless, Class D Audio Amplifier (V = 3.3V GND +25°C, unless otherwise noted.) SYNC DD A TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER 100 8Ω L ...

Page 5

V = GND +25°C, unless otherwise noted.) DD SYNC A EFFICIENCY vs. SUPPLY VOLTAGE 100 8Ω 6Ω 16Ω ...

Page 6

Low EMI, Filterless, Class D Audio Amplifier (V = 3.3V GND +25°C, unless otherwise noted.) DD SYNC A OUTPUT FREQUENCY SPECTRUM 0 SSM MODE V = -60dBV OUT - 1kHz R = 8Ω ...

Page 7

Low EMI, Filterless 10µF 1µ (C4) (B1 (B3) SHDN UVLO/POWER MANAGEMENT 2 (B4) IN+ 3 (A4) IN- MAX9712 GND PGND 7 4 (B2) (A5 UCSP BUMP. _______________________________________________________________________________________ Class ...

Page 8

Low EMI, Filterless, Class D Audio Amplifier PIN BUMP NAME TDFN/µMAX UCSP IN IN GND SHDN SYNC 7 B2 PGND 8 C1 OUT OUT- ...

Page 9

V IN- V IN+ OUT- OUT+ t ON(MIN OUT+ OUT- Figure 1. MAX9712 Outputs with an Input Signal Applied Table 1. Operating Modes SYNC INPUT MODE GND FFM with f = 1100kHz S FLOAT FFM with f ...

Page 10

Low EMI, Filterless, Class D Audio Amplifier V IN- V IN+ OUT- OUT+ t ON(MIN OUT+ OUT- Figure 2. MAX9712 Output with an Input Signal Applied (SSM Mode) the load voltage, resulting in ...

Page 11

FREQUENCY (MHz) Figure 3. MAX9712 with 76mm of Speaker Cable The MAX9712 has a shutdown mode that reduces power consumption and extends battery ...

Page 12

Low EMI, Filterless, Class D Audio Amplifier the power conversion of the class D amplifier. For exam- ple, an 8mV DC offset across an 8Ω load results in 1mA extra current consumption in a class AB device. In the ...

Page 13

V DD 1µ MAX9712 IN+ OUT+ RIGHT-CHANNEL DIFFERENTIAL AUDIO INPUT IN- SYNC 1µ MAX9712 IN+ OUT+ LEFT-CHANNEL DIFFERENTIAL AUDIO INPUT IN- SYNC Figure 7. Master-Slave Stereo Configuration TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER 100 ...

Page 14

Low EMI, Filterless, Class D Audio Amplifier V 0.1µF AUX_IN 2.2kΩ MAX4063 BIAS 2.2kΩ 0.1µF IN+ IN- 0.1µF Pin Configurations (continued) TOP VIEW MAX9712 (BUMP SIDE DOWN OUT- GND A PV PGND SHDN DD B OUT+ ...

Page 15

For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ 500mW, Low EMI, Filterless, Class D Audio Amplifier PACKAGE OUTLINE, 4x3 UCSP Package Information 1 21-0104 ...

Page 16

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 PIN 1 INDEX AREA NUMBER OF LEADS ...

Page 17

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

Page 18

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 ÿ 0.50±0.1 0.6±0.1 1 0.6±0.1 TOP VIEW ...

Related keywords