MAX97003 Datasheet, PDF (1/48 Pages) Maxim Integrated Products – High-Efficiency, Low-Noise Audio Subsystem

19-6044; Rev 0; 9/11
MAX97003
High-Efficiency, Low-Noise Audio Subsystem
General Description
The MAX97003 audio subsystem combines a mono
speaker amplifier with a stereo headphone amplifier. The
headphone and speaker amplifiers have independent
volume and on/off controls. The four inputs are configu-
rable as two differential or four single-ended inputs.
To minimize output noise, both the headphone and
speaker outputs utilize a downward expander/noise gate
to attenuate noise when no desired input signal is present.
The speaker output incorporates an adjustable dynamic
range compressor (DRC) and distortion limiter to protect
the speaker and maximize loudness. This allows high
gain for low-level signals without compromising the qual-
ity of large signals.
All controls are performed using the two-wire I²C inter-
face. The IC operates in the extended -40NC to +85NC
temperature range, and is available in the 2.0mm x
2.4mm, 20-bump WLP package (0.4mm pitch).
Applications
Cell Phones
Portable Media Players
Ordering Information appears at end of data sheet.
Features
S 2.7V to 5.5V Speaker Supply Voltage
S 1.8V Headphone Supply Voltage
S 1.0W Speaker Output (V_PVDD = 4.2V, Z_SPK = 8I +
68µH, 1% THD+N)
S 32mW/Channel Headphone Output (R_HP = 32I)
S Active Emissions Limiting for Enhanced EMI
Reduction
S Efficient Class H Headphone Amplifier
S Ground-Referenced Headphone Outputs
S Headphone Ground Sense
S 2 Stereo Single-Ended/Mono Differential Inputs
S Integrated Expander/Noise Gate for Low Output
Noise
S Integrated DRC (Speaker Outputs)
S Integrated Distortion Limiter (Speaker Outputs)
S Extensive Click-and-Pop Reduction Circuitry
S TDMA Noise Free
S 2.0mm x 2.4mm, 20-Bump WLP Package (0.4mm
Pitch)
Simplified Block Diagram
1.8V BATTERY
I²C
POWER SUPPLY
CONTROL
STEREO/
MONO
INPUT
DRC AND
EXPANDER
VOLUME
STEREO/
MONO
INPUT
EXPANDER
VOLUME
MAX97003
CLASS D
AMPLIFIER
LIMITER
CLASS H
AMPLIFIER
CHARGE
PUMP
HEADPHONE
GROUND
SENSE
For related parts and recommended products to use with this part, refer to: www.maxim-ic.com/MAX97003.related.
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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.