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MAX9875ERP+TG45

Description
Low RF Susceptibility, Mono Audio Subsystem with DirectDrive Headphone Amplifier
CategoryAnalog mixed-signal IC    Consumption circuit   
File Size539KB,30 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
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MAX9875ERP+TG45 Overview

Low RF Susceptibility, Mono Audio Subsystem with DirectDrive Headphone Amplifier

MAX9875ERP+TG45 Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerMaxim
Parts packaging codeBGA
package instructionVFBGA, BGA20,4X5,20
Contacts20
Reach Compliance Codecompli
ECCN codeEAR99
channel separation65 dB
Commercial integrated circuit typesVOLUME CONTROL CIRCUIT
JESD-30 codeR-PBGA-B20
length2.64 mm
Number of channels1
Number of functions1
Number of terminals20
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeVFBGA
Encapsulate equivalent codeBGA20,4X5,20
Package shapeRECTANGULAR
Package formGRID ARRAY, VERY THIN PROFILE, FINE PITCH
Peak Reflow Temperature (Celsius)NOT SPECIFIED
power supply3.7 V
Certification statusNot Qualified
Maximum seat height0.67 mm
Maximum slew rate16 mA
Maximum supply voltage (Vsup)5.25 V
Minimum supply voltage (Vsup)2.7 V
surface mountYES
technologyBICMOS
Temperature levelINDUSTRIAL
Terminal formBALL
Terminal pitch0.5 mm
Terminal locationBOTTOM
Maximum time at peak reflow temperatureNOT SPECIFIED
width2.02 mm
19-4536; Rev 0; 3/09
Low RF Susceptibility, Mono Audio
Subsystem with DirectDrive Headphone Amplifier
General Description
The MAX9875 combines a high-efficiency Class D
audio power amplifier with a stereo Class AB capacitor-
less DirectDrive
®
headphone amplifier. Maxim’s 3rd
generation, filterless Class D amplifier with active emis-
sions limiting technology provides Class AB perfor-
mance with Class D efficiency.
The MAX9875 delivers up to 725mW from a 3.7V supply
into an 8Ω load with 87% efficiency to extend battery life.
The filterless modulation scheme combined with active
emissions limiting circuitry and spread-spectrum modu-
lation greatly reduces EMI while eliminating the need for
output filtering used in traditional Class D devices.
The stereo Class AB headphone amplifier in the
MAX9875 uses Maxim’s patented DirectDrive architec-
ture, that produces a ground-referenced output from a
single supply, eliminating the need for large DC-blocking
capacitors, saving cost, space, and component height.
The device utilizes a user-defined input architecture,
three preamplifier gain settings, an input mixer, volume
control, comprehensive click-and-pop suppression, and
I
2
C control.
The MAX9875 is available in a thermally efficient,
space-saving 20-bump WLP package.
KIT
ATION
EVALU
E
BL
AVAILA
Features
Low Emissions, Filterless Class D Amplifier
Achieves Better than 10dB Margin Under EN55022
Class B Limits
Low RF Susceptibility Design Rejects TDMA
Noise from GSM Radios
Input Mixer with User-Defined Input Mode
725mW Speaker Output (R
SPK
= 8Ω, PVDD = 3.7V)
53mW Headphone Output (R
HP
= 16Ω, V
DD
= 3.7V)
Low 0.05% THD+N at 1kHz (Class D Power
Amplifier)
Low 0.016% THD+N at 1kHz (Headphone
Amplifier)
87% Efficiency (R
SPK
= 8Ω, P
OUT
= 750mW)
High Speaker Amplifier PSRR (72dB at 217Hz)
High Headphone Amplifier PSRR (84dB at 217Hz)
I
2
C Control
Hardware and Software Shutdown Mode
Click-and-Pop Suppression
Current-Limit and Thermal Protection
Available in a Space-Saving, 2.5mm x 2.0mm WLP
Package
MAX9875
Ordering Information
PART
MAX9875ERP+TG45
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
20 WLP (5x4)
Applications
Cell Phones
Portable Multimedia Players
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
+Denotes
a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
G45 indicates protective die coating.
Simplified Block Diagram
SINGLE SUPPLY
2.7V TO 5.25V
Pin Configuration
TOP VIEW
(BUMP SIDE DOWN)
1
2
3
4
5
PREAMPLIFIER
VOLUME
CONTROL
A
HPR
B
V
DD
BIAS
SDA
N.C.
OUT+
HPL
V
SS
C1N
C1P
MIXER/MUX
I
2
C
INTERFACE
VOLUME
CONTROL
C
INB2
D
INA2
INA1
GND
N.C.
INB1
SCL
PGND
PVDD
MAX9875
OUT-
WLP
________________________________________________________________
Maxim Integrated Products
1
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.

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