Inside

• 16-bit Analog Interface for DSP Solutions
• Integrated power supply and audio for wireless systems
• TI offers industry's first complete range of 1394 design kits
• Mixed-Signal & Analog CD-based designer's guide
• 400 PDPI linear image sensor with electronic shutter capability
• Optocoupler with feedback for analog signals
• Booming 1 W output with improved fidelity
• TL16PIR552 Dual UART with IrDA and IEEE 1284
• High-Speed Peripheral GeoPort™/AppleTalk™ Transceivers
• Single-Ended to Differential SCSI Converter Chipset
• Wireless and Telecommunications Data Book
• Opto-isolated feedback amplifier in "gull wing" package

16-bit Analog Interface for DSP Solutions

Product Features

• 16 bit sigma delta AIC
• Power dissipation: 100 mW (typ), Power down 2.5 mW (typ)
• Programmable serial port interface
• Internal 64X oversampling
• THD of 103 dB on ADC, and 96 dB on DAC
• Characterized for operation from 0^oC to 70^oC

The TLC320AD56 enhances TI world leadership in digital signal processing solutions. The newest member of the family has a glueless interface, via serial port, to the TMS320 family of digital signal processors (DSPs) reducing overall system cost and board space.

The TLC320AD56 offers a typical signal to distortion ratio of 103 dB at 3 V and 85 dB at 5 V on the ADC channel, and 91 dB on the DAC channel. It also offers a minimum signal-to-noise ratio (SNR) of 86 dB on the ADC channel and 85 dB on the DAC channel.

One advantage of 64X oversampling sigma-delta conversion is that it requires only a single pole R-C for the anti-aliasing filter significantly reducing overhead system cost. This is due to the sample frequency being far enough away from the signal frequency band that a single pole achieves adequate rejection.

The ‘AD56 consists of two synchronous conversion paths, one for each data direction, and includes an interpolation filter before the DAC and a decimation filter after the ADC. Other overhead functions include on-chip timing and control. It has a digital loopback function that allows for in-circuit system level tests. This feeds the ADC output to the DAC input on the IC. The ÔAD56 features a serial port interface whose options include reset, power-down, communications protocol, serial clock rate, and test mode. The power down mode reduces the power dissipation from the typical operating level of 100 mW to only 2.5 mW.

The TLC320AD56 package availability includes 28-pin PLCC, 28-pin SOIC and 48-pin TQFP.

An EVM is available for the TLC320AD56. To order, call 1-800-317-8354. The EVM also includes an application note which describes the TLC320AD56 and use of the EVM to demonstrate ‘AD56 performance and interface to the TMS320C5x DSK.

• TLC320AD56CFN