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MAX9770

Description
1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28
Categorysemiconductor    Other integrated circuit (IC)   
File Size495KB,24 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet Parametric Compare View All

MAX9770 Overview

1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28

MAX9770 Parametric

Parameter NameAttribute value
Number of functions1
Number of terminals28
Maximum operating temperature85 Cel
Minimum operating temperature-40 Cel
Maximum supply/operating voltage5.5 V
Minimum supply/operating voltage2.5 V
Rated bandwidth22 kHz
Rated output power1.2 dBm
Processing package description4.40 MM, MO-153AE, TSSOP-28
stateACTIVE
CraftsmanshipBICMOS
packaging shapeRECTANGULAR
Package SizeSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
surface mountYes
Terminal formGULL WING
Terminal spacing0.6500 mm
terminal coatingTIN LEAD
Terminal locationDUAL
Packaging MaterialsPLASTIC/EPOXY
Temperature levelINDUSTRIAL
Gain9 dB
Consumer IC TypeAUDIO AMPLIFIER
Number of channels2
19-3134; Rev 0; 5/04
1.2W Low-EMI, Filterless, Mono Class D Amplifier
with Stereo DirectDrive Headphone Amplifiers
General Description
The MAX9770 combines a mono, filterless, Class D
speaker amplifier and stereo DirectDrive headphone
amplifiers in a single device. The MAX9770 operates
from a single 2.5V to 5.5V supply and includes features
that reduce external component count, system cost,
board space, and offer improved audio reproduction.
The speaker amplifier makes 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 amplifier delivers
1.2W into an 8Ω load while offering efficiencies above
85%. A spread-spectrum scheme reduces radiated
emissions caused by the modulation frequency.
Furthermore, the MAX9770 oscillator can be synchro-
nized to an external clock through the SYNC input,
avoiding possible problem frequencies inside a system.
The speaker amplifier features a low 0.025% THD+N,
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 80dB 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 includes internally set, logic-selectable
gain, and a comprehensive input multiplexer/mixer, allow-
ing 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. The MAX9770 features thermal-over-
load and output short-circuit protection, and is specified
over the extended -40°C to +85°C temperature range.
Features
1.2W Filterless Class D Amplifier Passes FCC
Class B Radiated Emissions Standards with
100mm of Cable
Unique Spread-Spectrum Mode Offers 5dB
Emissions Improvement Over Conventional
Methods
80mW DirectDrive Headphone Amplifier
Eliminates Bulky DC-Blocking Capacitors
High 80dB PSRR at 217Hz
85% Efficiency
Low 0.015% THD+N
Industry-Leading Click-and-Pop Suppression
Integrated 3-Way Input Mixer/Multiplexer
Logic-Selectable Gain
Short-Circuit and Thermal Protection
±8kV
ESD-Protected Headphone Outputs
Low-Power Shutdown Mode
Available in Space-Saving, Thermally Efficient
Packages
28-Pin TQFN (5mm x 5mm x 0.8mm)
28-Pin TSSOP
MAX9770
Ordering Information
PART
MAX9770ETI
MAX9770EUI
Lead-free package.
TEMP RANGE
-40
o
C to +85
o
C
-40 C to +85 C
o
o
PIN-PACKAGE
28 TQFN-EP*
28 TSSOP
*EP
= Exposed paddle.
Simplified Block Diagram
V
DD
DirectDrive
STEREO
HEADPHONE
L1IN
L2IN
MONO
Applications
Cellular Phones
PDAs
Compact Notebooks
R1IN
R2IN
GAIN SEL
INPUT SEL
MUTE
SHDN
HPS
CLASS
D
SPKR
(MONO)
MAX9770
Pin Configuration appears at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
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.

MAX9770 Related Products

MAX9770 MAX9770ETI MAX9770EUI
Description 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28
Number of functions 1 1 1
Number of terminals 28 28 28
Maximum operating temperature 85 Cel 85 °C 85 °C
Minimum operating temperature -40 Cel -40 °C -40 °C
surface mount Yes YES YES
Terminal form GULL WING NO LEAD GULL WING
Terminal location DUAL QUAD DUAL
Temperature level INDUSTRIAL INDUSTRIAL INDUSTRIAL
Gain 9 dB 9 dB 9 dB
Number of channels 2 2 2
Is it Rohs certified? - incompatible incompatible
Maker - Maxim Maxim
Parts packaging code - QFN TSSOP
package instruction - 5 X 5 MM, 0.80 MM HEIGHT, QFN-28 4.40 MM, MO-153AE, TSSOP-28
Contacts - 28 28
Reach Compliance Code - _compli _compli
ECCN code - EAR99 EAR99
Nominal bandwidth - 22 kHz 22 kHz
Commercial integrated circuit types - AUDIO AMPLIFIER AUDIO AMPLIFIER
JESD-30 code - S-XQCC-N28 R-PDSO-G28
JESD-609 code - e4 e0
length - 5 mm 9.7 mm
Humidity sensitivity level - 1 1
Nominal output power - 1.2 W 1.2 W
Package body material - UNSPECIFIED PLASTIC/EPOXY
encapsulated code - HVQCCN TSSOP
Encapsulate equivalent code - LCC28,.2SQ,20 TSSOP28,.25
Package shape - SQUARE RECTANGULAR
Package form - CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) - 245 245
power supply - 3/5 V 3/5 V
Certification status - Not Qualified Not Qualified
Maximum seat height - 0.8 mm 1.1 mm
Maximum slew rate - 10 mA 10 mA
Maximum supply voltage (Vsup) - 5.5 V 5.5 V
Minimum supply voltage (Vsup) - 2.5 V 2.5 V
technology - BICMOS BICMOS
Terminal surface - NICKEL PALLADIUM GOLD Tin/Lead (Sn/Pb)
Terminal pitch - 0.5 mm 0.65 mm
Maximum time at peak reflow temperature - NOT SPECIFIED NOT SPECIFIED
width - 5 mm 4.4 mm
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