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.