Inside

• TI raises the bar on 3-D graphics performance with the TVP4010
• 16-bit Sigma Delta Analog Interface Circuit
• Power Distribution Devices Meet USB Specification
• Single-chip cellphone baseband power supply
• 300 mW stereo audio power amplifier offers 0.06% THD+N
• Single, high-speed MOSFET drivers in SOT=23 packages
• Wide input voltage, hign output drive CMOS op amps
• Single channel self-calibrating op amp
• Adjustable inverting DC-DC converter

16-bit Sigma Delta Analog Interface Circuit

Product Features

• Master/Slave Mode (supports up to 3 slaves)
• Differential output drives 600 load
• Single 5-V supply or 5 V analog and 3 V digital
• Power-down mode to 7.5 mW
• Input and output gain control
• Glueless DSP interface
• Characterized for operation from 0°C to 70°C

The TLC320AD50 16-bit analog interface circuit (AIC) is a versatile analog front end for business audio and modem applications. It provides high resolution signal conversion using an oversampling sigma delta technique. The AD50 has internal 64 X oversampling on the ADC and 256 X oversampling on the DAC.

Differential outputs on the ‘AD50 can drive a 600 differential load. It offers master/slave capability with support for up to three slaves, allowing this device to be used in multiple AIC applications such as voice-enabled modems. Additional applications include industrial process control, noise cancellation/suppression, and a variety of DSP systems requiring an interface to the analog world. With a 3-V interface and low power dissipation of only 120 mW typical this device is also ideal for battery operated equipment and interfacing to 3-V DSPs.

This device provides a glueless interface via serial port to the TMS320 family of TI Digital Signal Processors as well as to other industry standard DSPs. The ‘AD50 offers the following options: selectable conversion rate, reset, power-down, communications protocol, serial clock rate, gain control and system test mode (digital and analog loopback test mode).

The device has a typical signal-to-total harmonic distortion (THD) of 90 dB on the ADC and the DAC. Both ADC and DAC offer 89 dB typical signal-to-noise ratio (SNR).

The TLC320AD50 device is available in 28-pin SOIC (DW) and 48-pin TQFP (PT) packages.

Key Applications:

• Modems: V.34+, DSVD, telephony
• PCMCIA max modems
• DSP analog interface
• Noise suppression/cancellation
• Acoustical signal processing
• General Purpose 16-bit signal processing
• Industrial process control

• TLC320AD50CPT
• TLC320AD50CDW