BW0406XB BW0406XB Sigma-Delta speech telephony applications. prod

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BW0406XB BW0406XB Sigma-Delta speech telephony applications. prod

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0.35µm SIGMA-DELTA VOICE
BW0406XB
BW0406XB Sigma-Delta speech telephony applications. product contains both digital filter. normal output channels have with 70dB signal distortion ratio. output this device 14bit linear. on-chip voltage reference circuit included allow single supply operation.
FEATURES
Single chip voice line Oversampled Sigma Delta modulator Output format linear 14bit When serial interface mode, 14bit linear data 16bit format with don't care bits from complement format 256X Oversampling chip Decimation Filter Single ended Input Sampling Rate 8~11KHz chip voltage reference circuitry Single +3.3V Power Supply 2Vpp Input signal swing Power Consumption Operating Mode Typ(3.3V) Powerdown Mode 33mW Typ(3.3V)
TYPICAL APPLICATIONS
Speech Processing (Recognition, Synthesis, Compression etc.) Telephony Modem
BW0406XB
0.35µm SIGMA-DELTA VOICE
BLOCK DIAGRAM WITH INPUT/OUPUT APPLICATION
REFH AINFB
REFL SDOUT Serial Output
Analog Input
AMODIN
Modulator
Decimation filter
Serial Interface 14bit Linear 16bit format
PDOUT[13:0] Parallel Output
Voltage Reference Output
VREFOUT
Voltage Reference
X256FS
SYNC
VDDA
VSSA
VDDD VSSD
0.35µm SIGMA-DELTA VOICE
BW0406XB
CORE DESCRIPTION
Name VDDA VSSA REFH REFL AMODIN VREFOUT AINFB X256FS SYNC SDOUT PDOUT[13:0] VSSD VDDD Type vdda vssa piar50_bb piar50_bb piar50_bb poar50_bb piar50_bb picc_bb picc_bb picc_bb pot2_bb pot2_bb pot2_bb pot2_bb vssd vddd Description Analog Power (+3.3V) Analog Ground (0.0V) Analog Reference Power(+3.3V) Analog Reference Ground (0.0V) Analog input Vref output Analog Input Gain control Power Down (High active) Digital Reset (High active) 256*Sampling Freq.(FS) Clock Sampling Freq.(FS) Clock Clock Serial Data Output Parallel Data Output [14bit] Digital Ground Digital Power Supply
NOTES: Power pin(VDDA,VDDD) must connected DIODE_SLOT2. Ground (VSSA, VSSD) must connected DIODE_SLOT2.
Type Abbr. Analog Input Digital Input Analog Output Digital Output Analog Bidirectional Digital Bidirectional Analog Power Digital Power Analog Ground Digital Ground
BW0406XB
0.35µm SIGMA-DELTA VOICE
CORE CONFIGURTION
SDOUT PDOUT[13:0] SYNC VREFOUT VDDD
X256FS
bw0406xb
AMODIN AINFB REFH REFL
VSSD VDDA VSSA
0.35µm SIGMA-DELTA VOICE
BW0406XB
ABSOLUTE MAXIMUM RATINGS
Characteristic Supply Voltage Digital Input Voltage Storage Temperature Range Operating Temperature Range Symbol VDDD Tstg Topr Value -0.3 -0.3 Unit
NOTES: ABSOLUTE MAXIMUM RATING specifies values beyond which device damaged permanently. Exposure ABSOLUTE MAXIMUM RATING conditions extended periods affect reliability. Each condition value applied with other values kept within following operating conditions function operations under these conditions implied. voltages measured with respect VSS(VSSA VSSD) unless otherwise specified.
RECOMMENDED OPERATING CONDITIONS
Characteristics Supply Voltage Supply Voltage Difference Digital Input Voltage Range Analog Input Voltage Range Symbol VDDA VSSA VDDD VSSD VDDA VDDD 3.15 3.45 Unit
NOTE: strongly recommended that supply pins (VDDA, VDDD) powered from same source avoid power latch
BW0406XB
0.35µm SIGMA-DELTA VOICE
CONTROL CLOCK CHARACTERISTICS
Characteristics X256FS Frequency Frequency SYNC Frequency X256FS Duty cycle (H:L) Duty cycle (H:L) SYNC Duty cycle (H:L) X256FS Falling Edge Delay X256FS Falling SYNC Edge Delay Falling SDOUT Delay SYNC Falling PDOUT Delay Symbol Fmck Fbck Fsync MCDuty BCDuty SYDuty Tdbck Tdsync Tdsdout Tdpdout 40:60 2.048 50:50 50:50 50:50 60:40 Unit
X256FS
VDDD
1/Fmck X256FS 1/Fsync
VDDD
1/Fbck
SYNC
VDDD
VDDD
MCDuty
VDDD
BCDuty
SYNC
VDDD
SYDuty
X256FS
VDDD VDDD Tdbck
SYNC X256FS
VDDD VDDD Tdsync
SDOUT
VDDD VDDD Tdsdout
PDOUT SYNC
VDDD VDDD Tdpdout
0.35µm SIGMA-DELTA VOICE
BW0406XB
ELECTRICAL CHARACTERISTICS
(Measurement Bandwidth 20Hz-4KHz. Full scale input sine wave 1KHz, FS=8KHz, @VDDA=3.3V, Ta=25°C, Unless otherwise specified.) Characteristics Resolution Sampling rate Signal Distortion Ratio Offset Error Input Voltage Range Power comsumption (3.3v Operating Mode) Analog Digital Power comsumption (3.3v Powerdown Mode) Symbol Power Supply 0.25 Unit Bits Conditions
Analog Input Characteristics Input Linear
BW0406XB
0.35µm SIGMA-DELTA VOICE
CORE EVALUATION GUIDE
Core Test SDOUT,BCK,SYNC
SDOUT PDOUT[13:0]
SYNC
SYNC X256FS
X256FS
Analog Input
/\/\/\/\/\ /\/\/\/\/\
AMODIN AINFB
bw0406xb
VREFOUT
SDOUT PDOUT[13:0]
REFH REFL
Control Logic
VDDD VSSD VDDA VSSA
Table Connection User Guide Line Embedded Core Test Location 0.1mF TANTALUM CAPACITOR 10mF CERAMIC CAPACITOR 0.33mF TANTALUM CAPACITOR RESISTOR Description
NOTES: analog power/ground must separated from digital power/ground. TYPE denote Power Ground respectively. Power typical value: VDDA VDDD 3.3V, VSSA VSSD 0.0V
0.35µm SIGMA-DELTA VOICE
BW0406XB
TIMING DIAGRAM
frame sync clock(SYNC) transitions determine start serial data. Output data serial output data clocked falling edge BCK. parallel output data clocked falling edge SYNC. 14bit linear
NOTES: SYNC clock sampling frequency, 14bit linear data 16bit serial data format, this accomplished 16FS clock don't care bits added from LSB, into 16bit format.
BW0406XB
0.35µm SIGMA-DELTA VOICE
Digital data output interface timing diagram
Clock
SYNC
16Fs
MSB,
Non-valid data(0 insetion)
SDOUT(Linear data, complement) PDOUT[13:0](Linear data, complement)
Frame
Digital clock interface timing diagram
SYNC
16Fs
256Fs
X256FS
0.35µm SIGMA-DELTA VOICE
BW0406XB
INPUT APPLICATION GUIDE
Input stage application guide
AINFB
Analog Input
AMODIN
Typical value 0.33mF
VREFOUT port application guide
VREFOUT Ground
0.1mF, 10mF Note: user should dispose order shown above dispose capacitors VREFOUT close possibe.
BW0406XB
0.35µm SIGMA-DELTA VOICE
FEEDBACK REQUEST
should quite helpful CODEC core development specify your system requirements CODEC following characteristic checking table fill additional questions. appreciate your interest products. Thank very much. Could explain external/internal configurations required? Specially requested function list What your signal band use, 3.6KHz? 4KHz? 4.8KHz? What your analog in/output signal voltage swing? what kind format your want analog signal in/ouput: single differential format? can, Please know, what your exact in/output signal spec. What your minimum S/N+D spec? want linear phase characteristic don't care digital filter spec? Could give exact design spec speech adc?

BW0406XB BW0406XB Sigma-Delta speech telephony applications. prod

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