Key Features

Audio
Audio power consumption:

• 5mW: 96dB DAC to Headphone @ 1.8V, 32Ω
• - 7mW: 100dB DAC to Headphone @ 2.9V, 32Ω

Sigma Delta Converters

• DAC
  
  • 98dB SNR ('A' weighted) @ 1.8V
    
  • 102dB SNR ('A' weighted) @ 2.9V
    
• ADC
  
  • 83dB SNR ('A' weighted) @ 1.8V
    
• Sampling Frequency
  
  • DAC: 8-48kHz
    
  • ADC: 8-24kHz

High Efficiency Headphone Amplifier

• volume control via serial interface
  
• 32 steps @1.5dB and MUTE
  
• 2x12mW @16 driver capability@ 1.8V supply
• THD -74dB @16Ω; 1.8V
  
• 2x40mW @16 driver capability@ 2.9V supply
  
• THD -77dB @16Ω; 2.9V
  
• headphone and over-current detection
  
• phantom ground eliminates large capacitors
  
• ground noise cancellation

Line Output

• volume control via serial interface
  
• 32 steps @1.5dB and MUTE
  
• 0.6Vp @10kΩ
  
• ground noise cancellation

Microphone Input

• 3 gain pre-setting (28dB/34dB/40dB) and AGC
  
• 2 gain steps @1.5dB and MUTE
  
• supply for electret microphone
  
• microphone detection
• remote control by switch

2 Line Inputs

• volume control via serial interface
  
• 32 steps @1.5dB and MUTE
  
• stereo or 2x mono

Audio Mixer

• 6 channel input/output mixer with AGC
  
• mixes line inputs abd microphone with DAC
  
• left and right channels independent

Power Management
Voltage Generation

• step down for CPU core (0.61V-3.35V, 250mA)
  
• step down for peripheral (0.61V-3.35V, 250mA)
• LDO1 for AFE supply (1.7V (1.65-3.2V), 50mA)
  
• LDO2 for AFE supply (2.7V (2.3-3.5V), 200mA)
  
• LDO3 for peripherals (1.2V-3.5V, 100/200mA)
  
• LDO4 for peripherals (1.2V-3.5V, 100/200mA)
  
• VBUS comparator
• separate input for LDO3
  
• power supply supervision & hibernation modes
  
• 5sec and 10sec emergency shut-down

Backlight Driver

• step up for backlight (25V)
  
• current control mode (1.2-36mA)
  
• voltage control mode
  
• 2 current sinks
  
• automatic dimming
  
• over-voltage protection

Battery Charger

• automatic trickle charge (55mA)
• prog. constant current charging (55-460mA)
  
• prog. constant voltage charging (3.9V-4.25V)
• current limitation for USB mode
  
• integrated battery switch

General
Supervisor

• automatic battery monitoring with interrupt generation
  and selectable warning level
  
• automatic temperature monitoring with interrupt
  generation and selectable warning and shutdown
  levels

Real Time Clock

• ultra low power 32kHz oscillator
• 32bit RTC sec counter, 96 days auto wake-up
  
• selectable alarm (seconds or minutes)
  
• 128bit free SRAM for random settings
  
• 32kHz clock output to peripheral
• voltage generation
  
• trim able oscillator
  
• <1uA total power consumption

Auxiliary Oscillator (system clock generation)

• low power 12-24MHz oscillator
  
• clock output

General Purpose ADC

• 10bit resolution
  
• 19 inputs analog multiplexer

Interfaces

• 2 wire serial control interface
• reset pin with selectable delay, power good pin
  
• 64bit unique ID (OTP)
  
• 22 different interrupts
• Package CTBGA68 [6.0x6.0x1.1mm] 0.5mm pitch