PCM3500 Datasheet, PDF (1/28 Pages) Texas Instruments – Low Voltage, Low Power, 16-Bit, Mono VOICE/MODEM CODEC

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PCM3500
PCM3500
SBAS117
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Low Voltage, Low Power, 16-Bit, Mono
TM _{VOICE/MODEM CODEC}
FEATURES
q 16-BIT DELTA-SIGMA DAC AND ADC
q DESIGNED FOR MODEM ANALOG FRONT END:
Supports up to 56kbps Operation
q ANALOG PERFORMANCE:
Sampling Frequency: 7.2kHz to 26kHz
Dynamic Range: 88dB (typ) at f_S = 8kHz, f_IN = 1kHz
q SYSTEM CLOCK: 512f_S
q MASTER OR SLAVE OPERATION
q ON-CHIP CRYSTAL OSCILLATOR CIRCUIT
q ADC-TO-DAC LOOP-BACK MODE
q TIME SLOT MODE SUPPORTS UP TO
FOUR CODECs ON A SINGLE SERIAL
INTERFACE
q POWER-DOWN MODE: 60µA (typ)
DESCRIPTION
The PCM3500 is a low cost, 16-bit CODEC designed
for modem Analog Front End (AFE) and speech pro-
cessing applications. The PCM3500’s low power op-
eration from +2.7V to +3.6V power supplies, along
with an integrated power-down mode, make it ideal for
portable applications.
The PCM3500 integrates all of the functions needed for
a modem or voice CODEC, including delta-sigma
q POWER SUPPLY: Single +2.7V to +3.6V
q SMALL PACKAGE: SSOP-24
APPLICATIONS
q SOFTWARE MODEMS FOR:
Personal Digital Assistant
Notebook and Hand-Held PCs
Set-Top Box
Digital Television
Embedded Systems
q PORTABLE VOICE RECORDER/PLAYER
q SPEECH RECOGNITION/SYNTHESIS
q TELECONFERENCING PRODUCTS
digital-to-analog and analog-to-digital converters, in-
put anti-aliasing filter, digital high-pass filter for DC
blocking, and an output low-pass filter. The synchro-
nous serial interface provides for a simple, or glue-free
interface to popular DSP and RISC processors. The
serial interface also supports Time Division Multiplex-
ing (TDM), allowing up to four CODECs to share a
single 4-wire serial bus.
V_IN
AGND
V_REF1
V_COM
V_REF2
V_OUT
AGND
∆Σ
AAF
Modulator
(ADC)
Reference
SMF
Multi-Level
DAC
Power
Decimation
Digital Filter
HPF
Loop
∆Σ
Modulator
Interpolation
Digital Filter
Mode Control
Clock
Gen/
OSC
FS
BCK
DIN
DOUT
FSO
SCKIO
V_CC AGND DGND V_DD PDWN
LOOP HPFD M/S TSC
XTO XTI
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PDS-₁1524B
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