Rainbow Electronics AT73C246 - Manual

Features
• AUDIO CODEC
– 100dB Dynamic Range Stereo Audio DAC - 8 to 96 kHz sampling frequency
– 96dB Dynamic Range Stereo Audio ADC - 8 to 96 kHz sampling frequency
– 16 / 32 Ohms headset amplifier with capless operation
• SNR: 97 dB A-Weighted
• THD: -60 dB (16Ohms / 20mW / 3.3V supply)
• Maximum output power: 55mW (16Ohms / 3.3V supply)
– Stereo line inputs, stereo auxiliary inputs
– Stereo microphone inputs with bias generator for electret device
– Low power Analog Bypass mode (Line / Aux in to Headset Out)
– Low power Analog sidetone mode (Microphone in to Headset Out)
– Automatic Audio path control with smooth fade in / fade out operation
– I
2 S port
• Master / Slave Operation
• I
2 S / Left / Right justified modes
• 16 / 18 / 20 / 24 bit operation
• 6x SUPPLY CHANNEL VOLTAGE REGULATORS
– DCDC0:
• 1.85V - 600mA. 0.8 to 3.6V / 50mV step.
• 2 MHz switching buck regulator
• Fast load transient response - PWM / PFM modes.
• Efficiency up to 92%
– DCDC1:
• 1.2V - 600mA. 0.8 to 3.6V / 50mV step.
• 2 MHz switching buck regulator
• Fast load transient response - PWM / PFM modes.
• Efficiency up to 90%
– LDO2: 1V - 300mA. 0.8 to 1.35V / 50mV step - Fast transient response
– LDO3: 3.3V - 200mA. 2.7 to 3.6V / 50mV step - Fast transient response
– LDO4: 3.3V - 200mA. 2.7 to 3.6V / 50mV step - Audio codec supply
– LDO5: 2.5V - 10mA - Backup battery charger and RTC supply
• LOW CONSUMPTION POWER MANAGER
– 2.5V - 5.5V VIN Operation
– 20uA typical consumption OFF mode
– VIN monitor, CPU supplies monitor
– Die temperatue and over-current protections
– Reset and Interrupt generation
– Automatic Voltage Ramping on supply channels for DVS applications
– Standby mode with selectable supplies OFF
• RTC
– Ultra Low power crystal oscillator (<1uA typ.)
– Wake up function with programmable alarm or selectable inputs
• 10-b / 300kS/s ADC with 4 external / 6 int\ernal selectable inputs
• Two-Wire Interface for PMU and Audio controls
• Available in 7.5 x 7.5 x 0.9 mm 64-pin QFN Package
• Applications: Multimedia, Audio + Supply solution for MPU+DDR2 designs.
Power
Management
and Analog
Companions
(PMAAC)
AT73C246
6 Supply
Channel PMU
With Audio
Codec
11050A–PMAAC–07-Apr-10