FEATURES

· Monolithic 20-Bit DS ADC and DAC

· 16/20-Bit Input/Output Data

· Software Control: PCM3002

· Hardware Control: PCM3003

· Stereo ADC:

– Single-Ended Voltage Input

– Antialiasing Filter

– 64′ Oversampling

– High Performance

· THD+N: –86 dB

· SNR: 90 dB

· Dynamic Range: 90 dB

· Stereo DAC:

– Single-Ended Voltage Output

– Analog Low-Pass Filter

– 64′ Oversampling

– High Performance

· THD+N: –86 dB

· SNR: 94 dB

· Dynamic Range: 94 dB

· Special Features (PCM3002, PCM3003)

– Digital De-Emphasis: 32 kHz, 44.1 kHz,

48 kHz

– Power Down: ADC/DAC Independent

· Special Features (PCM3002)

– Digital Attenuation (256 Steps)

– Soft Mute

– Digital Loopback

– Four Alternative Audio Data Formats

· Sampling Rate: 4 kHz to 48 kHz

· Single 3-V Power Supply

· Small Package: SSOP-24

APPLICATIONS

· DVC Applications

· DSC Applications

· Portable/Mobile Audio Applications

DESCRIPTION

The PCM3002 and PCM3003 are low-cost,

single-chip stereo audio codecs (analog-to-digital and

digital-to-analog converters) with single-ended analog

voltage input and output.

The ADCs and DACs employ delta-sigma modulation

with 64-times oversampling. The ADCs include a

digital decimation filter, and the DACs include an

8-times oversampling digital interpolation filter. The

DACs also include digital attenuation, de-emphasis,

infinite zero detection, and soft mute to form a complete subsystem. The PCM3002 and PCM3003

operate with left-justified (ADC) and right-justified

(DAC) formats, while the PCM3002 also supports

other formats, including the I2S data format.

The PCM3002 and PCM3003 provide a power-down

mode that operates on the ADCs and DACs indepen- dently.

The PCM3002 and PCM3003 are fabricated using a

highly advanced CMOS process, and are available in

a 24-pin SSOP package. The PCM3002 and

PCM3003 are suitable for a wide variety of

cost-sensitive consumer applications where good performance

is required.

The PCM3002 programmable functions are controlled

by software. The PCM3003 functions, which are

controlled by hardware, include de-emphasis,

power-down, and audio data format selections.