TLV320AIC20K

  Stereo 16-Bit Oversampling Sigma-Delta A/D Converter
 Stereo 16-Bit Oversampling Sigma-Delta D/A Converter
 Support Maximum Master Clock of 100 MHz to Allow DSPs Output Clock to be Used as a Master Clock
 Selectable FIR/IIR Filter With Bypassing Option
 Programmable Sampling Rate up to:
  Max 26 Ksps With On-Chip IIR/FIR Filter
  Max 104 Ksps With IIR/FIR Bypassed
 On-Chip FIR Produced 84-dB SNR for ADC and 92-dB SNR for DAC over 13-Khz BW
 Smart Time Division Multiplexed (SMARTDM^R )Serial Port
   Glueless 4-Wire Interface to DSP
   Automatic Cascade Detection (ACD)Self-Generates Master/Slave Device Addresses
   Programming Mode to Allow On-The-Fly Reconfiguration
   Continuous Data Transfer Mode to Minimize Bit Clock Speed    Support Different Sampling Rate for Each Device
   Turbo Mode to Maximize Bit Clock For Faster Data Transfer and Allow Multiple Serial Devices to Share the Same Bus
   Allows up to Eight Devices to be Connected to a Single Serial Port Host port
  2-Wire Interface 2 2
  Selectable I C or S C Differential and Single-Ended Analog Input/Output
 Built-In Analog Functions:
  Analog and Digital Sidetone
  Antialiasing Filter (AAF)
  Programmable Input and Output Gain Control (PGA)
 Microphone/Handset/Headset Amplifiers
 AIC20/21/20K Have a Built-In 8-? Speaker Driver
   Power Management With Hardware/Software Power-Down Modes 30 W Separate Software Control for ADC and DAC Power Down
 Fully Compatible With Common TMS320^R DSP Family and Microcontroller Power Supplies
   1.65-V - 1.95-V Digital Core Power
   1.1-V - 3.6-V Digital I/O
   2.7-V - 3.6-V Analog
 Internal Reference Voltage (Vref)
 2s Complement Data Format
 Test Mode Which Includes Digital Test Mode Which Includes Digital Loopback and Analog Loopback

    The TLV320AIC20K is a low-cost, low-power, highly-integrated, high-performance, dual-voice codec. It features two 16-bit analog-to-digital (A/D) channels and two 16-bit digital-to-analog (D/A) channels, which can be connected to a handset, headset, speaker, microphone, or a subscriber line via a programmable analog crosspoint. 

    The TLV320AIC20K provides high resolution signal conversion from digital-to-analog (D/A)and fromanalog-to-digital (A/D) using oversampling sigma-delta technology with programmable sampling rate.

    The TLV320AIC20K implements the smart time division multiplexed serial port (SMARTDM(^TM)) . The  SMARTDMport is a synchronous 4-wire serial port in TDM format for glue-free interface to TI DSPs (i.e.,

    TMS320C5000^R ,TMS320C6000 DSP platforms) and microcontrollers. The SMARTDM(^TM) supports both continuous data transfer Mode and on-the-fly reconfiguration programming mode.

    The TLV320AIC20K can be gluelessly cascaded to and MARTDM-based device to form a multichannel codec, and up to eight TLV320AIC2x codecs can be cascaded to a single serial port.

     The TLV320AIC20K provides a flexible host port. The host port interface is a two-wire serial interface that can be programmed to be either an industrial standard I ² C or a simple S²C (start-stop communication protocol).

    The TLV320AIC20K integrates all of the critical functions needed for most voice-band applications including MICpreamplifier, handset amplifier headset amplifier, 8-? speaker driver, sidetone control, antialiasing filter (AAF),input/output programmable gain amplifier (PGA), and selectable low-pass IIR/FIR filters.

    The TLV320AIC20K implements an extensive power management; including device power-down, independentsoftware control for turning off ADC, DAC, operational-amplifiers, and IIR/FIR filter (bypassable) to maximize

    The TLV320AIC20K low power operation from 2.7-V to 3.6-V power supplies along with extensive powermanagement make it ideal for portable applications including wireless accessories, hands-free car kits, VOIP,cable modem, and speech processing. Its low group delay characteristic makes it suitable for single ormultichannel active control applications.stem power conservation. The TLV320AIC2x consumes only 14.9 mW per channel at 3 V.

    The TLV320AIC20K is characterized for commercial operation from 0°C to 70°C, and industrial operation from-40°C to 85°C. The TLV320AIC2xk is characterized for industrial operation from -40°C to 85°C.