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General Description
The OCA7210 is a 2.5-W high efficiency filter-free
class-D audio power amplifier that requires only three
external components.
Features like 88% efficiency, −75-dB PSRR, improved
RF-rectification immunity, and 8 mm2 total PCB area
make the OCA7210 ideal for cellular handsets. A fast
start-up time of 1 ms with minimal pop makes the
OCA7210 ideal for PDA applications.
In cellular handsets, the earpiece, speaker phone, and
melody ringer can each be driven by the OCA7210.
The OCA7210 allows independent gain while summing
signals from separate sources, and has a low 36 μV
noise floor, A-weighted.
Pin Configuration
2.5Watts Audio Power Amplifier
Maximum Battery Life and Minimum Heat
- Efficiency With an 8-Speaker:
- 88% at 400 mW
- 80% at 100 mW
- 2.8-mA Quiescent Current
- 0.5-μA Shutdown Current
Only Three External Components
- Optimized PWM Output Stage Eliminates
LC Output Filter
- Internally Generated 250-kHz Switching Frequency
Eliminates Capacitor and Resistor
- Improved PSRR (−75 dB) and Wide Supply
Voltage (2.5 V to 5.5 V) Eliminates Need for a
Voltage Regulator
- Fully Differential Design Reduces RF Rectification
and Eliminates Bypass Capacitor
- Improved CMRR Eliminates Two Input Coupling
Packages: Micro SMD 9B
Ordering Information
OCA7210X X X
B: Micro SMD
Blank: Tube or Bulk
A: Tape & Reel
Temperature Grade:
D: -40~85
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Rev. 1.3 Feb .27, 2018
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