Datasheet > BW0406X_LGISDN

BW0406X_LGISDN

更新时间： 2022-01-18 22:24:00

品牌	Logo	应用领域
其他 - ETC		解码器编解码器综合业务数字网
页数	文件大小	规格书
14页	275K
描述
BW0406X_LGISDN Sigma-Delta Voice CODEC\|Data Sheet

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BW0406X_LGISDN 数据手册

REV 1.1 2002/07/30

Sigma-Delta Voice CODEC

BW0406X_lgisdn

FEATURES

GENERAL DESCRIPTION

- Single chip voice line Codec

(A/D, D/A converter included)

- Oversampled Sigma Delta modulator/

Demodulator

The BW0406X_lgisdn is Sigma-Delta CODEC for

speech and telephony applications. The product contains

both digital IIR/FIR filter and smoothing filter. The

normal input and output channels have /A law format

- Input/Output format : 8bit -law/A-law and

with 38dB signal to distortion ratio.

linear 14bit

The input and output of this device is compressed

* These three types are easily selectible by

control pins

form(A-law, -law) and 14bit linear which can be

* When serial interface mode, the 14bit

linear data has 16bit format with two don't

care bits from LSB

easily determined by control select pins

An on-chip voltage reference circuit is included to

allow the single supply operation

- Sigma Delta ADC.

* 256X Oversampling

* On chip Decimation Filter

* On chip Smoothing Filter

- Sigma Delta DAC.

TYPICAL APPLICATIONS

Speech Processing

* 256X Oversampling

* On chip 256X Interpolation Filter

* On chip Analog Post Filter

- Single ended Input and Output.

- Sampling Rate of 8~11KHz

- On chip voltage reference circuitry

- Single +3.3V Power Supply

- 2Vpp In, Output signal swing

- Power Consumption

(Recognition, Synthesis, Compression etc.)

Telephony

Modem

* Operating Mode : 10mW Typ(3.3V)

* Powerdown Mode : 33 W Typ(3.3V)

FUNCTIONAL BLOCK DIAGRAM WITH INPUT/OUPUT APPLICATION

ALOOP MUTE TPOST TDECI

REFH REFL

SINPO<1:0> SDECI<1:0>

DAPWD

AINFB0

SDOUT

ADC Serial

Output

CIS<0>

AINFB1

Serial Interface

Analog Input0

Analog Input1

1. 14bit Linear PCM in

16bit format

Analog

Modulator

Decimation

filter

2. -law

3. A-law

SDIN

DAC Serial

Interface

CIS<1>

Voltage Reference

Output

VREFOUT

Voltage Reference

APOSTOUT0

APOSTOUT1

DADS

LCS

Interpolation

filter

Analog Output0

Analog Output1

Analog

Postfilter

Digital

Modulator

COS<1:0>>

Differential to

Single circuit +

Smoothing filter

Selectible

powerdown circuit

CPSEL

COS<1:0>

CIS<1:0>

X256FS BCK

SYNC

RST

VDDD

VSSD VDDA VSSA

ADPWD DAPWD

SAMSUNG ELECTRONICS Co. LTD

12 3 4 5 6 7...14

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