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UPD63335

STEREO SOUND CODEC

NEC => Renesas Technology 

DATA SHEET

MOS INTEGRATED CIRCUITS

µ PD63335

STEREO SOUND CODEC

DESCRIPTION

The µ PD63335 is a stereo sound codec LSI that enables full-duplex communications and features two channels

each of on-chip 16-bit ADC and DAC circuits for mutual conversion between digital signals and audio analog signals

(having a maximum signal bandwidth of 20 kHz).

The analog signal input block enables four pairs of stereo signals plus three monaural signals to be output from

the output stage's internal mixing circuit, which can then be multiplexed and input to the ADC. One type of monaural

signal can be selected from two external pins via a selector as a monaural signal connected to an internal

microphone amplifier (MIC amp), with selectable gain of 0 dB or 20 dB.

The analog signal output block enables mixed output of analog signals output by the DAC, four pairs of stereo

analog signals, and an output signal from the MIC amp, and the volume of each signal can be controlled

independently before mixing. The digital audio signal I/O block supports an audio-type serial interface (two's

complement). In addition, a clocked serial interface (CSI) can be used for direct connection to a general-purpose

microcontroller for access to internal registers such as for volume control.

FEATURES

• Two channels each of over sample ∆Σ type ADC and DAC

• ADC SNR = 85 dB Typ.

• DAC SNR = 90 dB Typ.

• ADC and DAC digital filter characteristics

• Pass band ripple:

±0.1 dB (0 to 0.4 fS) for ADC and DAC

• Stop band attenuation:

−74 dB (0.6 fS) or above for ADC and DAC

• Sampling frequency (fS):

0.4 to 48 kHz

• Division rate from master clock can be set to 3072, 1536, 768, or 512

• Analog input block includes a multiplexer and analog output block includes a mixing circuit

• Low-noise monaural MIC amp is on chip

• On-chip reference voltage power supply (1.4 V (TYP.))

• Low supply voltage operation: DVDD = 3.3 V, AVDD = 3.3 V

• Support for power down mode in each internal block

• Operating ambient temperature: −40 to +85°C

APPLICATIONS

• Speech recognition systems, including car navigation systems

• Electronic toys with speech/audio I/O functions

ORDERING INFORMATION

Part Number

µ PD63335GA-9EU

Package

48-pin plastic TQFP (fine pitch) (7 × 7)

The information in this document is subject to change without notice. Before using this document, please

confirm that this is the latest version.

Not all devices/types available in every country. Please check with local NEC representative for

availability and additional information.

Document No. S15003EJ6V0DS00 (6th edition)

The mark shows major revised points.

Date Published February 2002 N CP(K)

Printed in Japan

©

2000

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