TLV320AIC21CPFB

Codecs Overview

The TLV320AIC21CPFB is a low-power, highly-integrated, programmable 16-bit, dual-channel CODEC from Texas Instruments. It features stereo 16-bit oversampling sigma-delta A/D and D/A converters with built-in analog functions including an antialiasing filter (AAF), programmable input/output gain amplifiers (PGA), microphone/handset/headset amplifiers, and an 8-ohm speaker driver. The device supports a maximum master clock of 100 MHz and allows the DSP output clock to be used as a control master clock. It offers selectable FIR/IIR filters with bypassing capability and programmable sampling rates up to 26 Ksps with filters or 104 Ksps with filters bypassed. The codec achieves 84-dB SNR for ADC and 92-dB SNR for DAC over a 13-kHz bandwidth. It operates on separate power supplies: 1.65-V to 1.95-V digital core and 2.7-V to 3.6-V analog supply. The component is housed in a 48-TQFP package.

Codecs Feature Summary

• Integrates stereo 16-bit oversampling sigma-delta A/D and D/A converters with built-in analog functions such as antialiasing filters and programmable gain amplifiers.
• Supports flexible serial interfaces including SMARTDM for glueless connection to DSPs and a two-wire host port compatible with I2C or S2C protocols.
• Features extensive power management with hardware/software power-down modes and independent software control for ADC, DAC, and operational amplifiers.

Codecs Applications

• Wireless accessories
• Hands-free car kits
• VOIP systems
• Cable modems
• Speech processing

Codecs Procurement Notes

Verify the specific ordering suffix CPFB corresponds to the commercial temperature range (0°C to 70°C) and the 48-TQFP package type as defined in the manufacturer's documentation. Confirm that the component meets RoHS compliance standards required for your assembly process. Ensure that the voltage levels for DVDD, AVDD, and IOVDD align with your system design before procurement.

Codecs Selection Notes

Select this component when a low-power, high-performance dual-channel voice CODEC is required for portable applications. Consider the TLV320AIC21CPFB for designs needing integrated speaker drivers and flexible clocking options via SMARTDM or standard serial ports. Evaluate the power consumption specifications against battery life requirements, noting the distinct analog and digital supply voltages necessary for operation.

Codecs Part Context

The TLV320AIC21CPFB belongs to the TLV320AIC2x family of audio CODECs, which includes variants like the TLV320AIC20, TLV320AIC24, and TLV320AIC25. These devices share common architectural features but may differ in temperature ranges, package types, or specific analog front-end capabilities. The 'CPFB' suffix indicates the commercial temperature grade and TQFP packaging, distinguishing it from industrial grade or other package options within the same functional family.

Codecs Replacement Considerations

Direct pin-to-pin replacements within the same family include the TLV320AIC20CPFB and TLV320AIC24CPFB, provided the application does not require specific features unique to those variants, such as different analog loopback configurations or distinct driver capabilities. Verify compatibility with existing firmware and register maps before substitution.

Codecs FAQ

What is the maximum sampling rate supported by the TLV320AIC21CPFB?

The device supports a maximum sampling rate of 26 Ksps when the internal FIR/IIR filters are enabled, and up to 104 Ksps when the filters are bypassed.

How is the control interface configured for the TLV320AIC21CPFB?

The codec uses a two-wire serial interface for host control that can be programmed to operate as either an industrial standard I2C bus or a simple S2C (start-stop communication protocol).

Does the TLV320AIC21CPFB include a built-in speaker driver?

Yes, the TLV320AIC21CPFB integrates an 8-ohm speaker driver capable of delivering up to 250 mW of output power at 3.3 V.