GENERAL DESCRIPTION

STw5094 is a low power Stereo Audio DAC device with Headphones Amplifiers for high quality MP3 and FM radio listening. The STw5094 includes also an high performance low power combined PCM CODEC ⁄ FILTER tailored to implement the audio front-end functions required by low voltage low power consumption digital cellular terminals with added MP3 and FM radio listening.

FEATURES:

Complete STEREO AUDIO DAC and FILTERS including:

■ 18 BIT DIGITAL TO ANALOG CONVERTERS.

■ LINEAR PHASE DIGITAL FILTERS.

■ ACTIVE LINEAR PHASE SMOOTHING FILTER.

■ 30Ω LOAD STEREO HEADPHONES DRIVERS, 8Ω LOAD MONO LOUDSPEAKER DRIVER FOR GROUP LISTENING.

Stereo Audio DAC Features:

■ MULTIBIT Σ∆ MODULATOR WITH DATA WEIGHTED AVERAGING DAC.

■ 92 dB DYNAMIC RANGE, 0.01 THD OVER 30Ω LOAD PERFORMANCE.

■ SUPPORTS ALL THE MPEG 1 & 2 SAMPLING FREQUENCIES AND THE EXTENSION TO MPEG 2.5: 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48 kHz.

■ TONES FROM TONE GENERATOR CAN BE INJECTED IN THE AUDIO PATHS.

Stereo Headphones and Loudspeaker/Earpiece Power Amplifiers features and Stereo Input for FM Radio Features:

■ 20kHz BANDWIDTH STEREO HEADPHONES OUTPUTS. DRIVING CAPABILITY: 20mW (TYP. 0.1 T.H.D) OVER 30Ω WITH 40 dB RANGE PROGRAMMABLE GAIN.

■ BALANCED EARPIECE ⁄ LOUDSPEAKER OUTPUT. DRIVING CAPABILITY: 190mW (TYP. 0.1 T.H.D) OVER 8Ω WITH 30dB RANGE PROGRAMMABLE GAIN.

■ ANALOG STEREO INPUT FOR FM RADIO WITH 38 dB RANGE PROGRAMMABLE GAIN.

Complete CODEC and FILTER system including:

■ 14 BIT LINEAR ADC AND DAC.

■ 8 BIT COMPANDED ADC AND DAC A-LAW OR µ-LAW.

■ TRANSMIT AND RECEIVE DIGITAL BAND-PASS FILTERS.

■ ACTIVE ANTIALIAS AND SMOOTHING FILTERS.

■ 8Ω LOAD EARPIECE/LOUDSPEAKER DRIVER, 30Ω LOAD AUXILIARY DRIVER.

Voice CODEC Features:

■ SUPPORT BOTH 8kHz AND 16kHz SAMPLING RATE.

■ ONE MICROPHONE BIASING OUTPUT.

■ REMOTE CONTROL FUNCTION.

■ ONE LINE INPUT AND TWO SWITCHABLE MICROPHONE AMPLIFIER INPUTS. 42.5dB RANGE PROGRAMMABLE GAIN.

■ TRANSIENT SUPRESSION DURING POWER UP AND POWER DOWN.

■ INTERNAL PROGRAMMABLE SIDETONE CIRCUIT.

■ INTERNAL RING, TONE AND DTMF GENERATOR.

■ PROGRAMMABLE PWM BUZZER DRIVER.

General Features:

■ SINGLE 2.7V to 3.3V SUPPLY.

■ EXTENDED TEMPERATURE RANGE OPERATION (*) -40°C to 85°C.

■ 1 µW STANDBY POWER (TYP. AT 2.7V).

■ 13 mW OPERATING POWER IN AUDIO LISTENING MODE (TYP. AT 2.7V).

■ 11 mW OPERATING POWER IN VOICE CODEC MODE (TYP. AT 2.7V).

■ 1.8V TO 3.3V CMOS COMPATIBLE DIGITAL INTERFACES.

■ PROGRAMMABLE PCM INTERFACE.

■ I2C COMPATIBLE CONTROL INTERFACE.

■ PROGRAMMABLE SERIAL AUDIO DATA INPUT INTERFACE (I2S AND OTHER FORMATS).