Description

The TLC7725IDRG4 is a single chip Analog Front-end (AFE) designed for modems up to 56Kbps. It is specifically designed for host processing applications using Pentium, Risc or DSP processors. This device is suitable for standalone appliances such as Hand Held PCs (HPC), Personal Digital Assistants (PDA), Webphones, Network Computers, and Set Top Boxes for Digital Television (Satellite and Cable). It operates at a nominal voltage of 3V.

Specifications and features

- General purpose signal processing analog front end (AFE)
- Targeted for V.34bis modem and 56Kbps modem applications
- 16-bit oversampling Σ∆ A/D and D/A converters
- 83dB signal to noise ratio for sampling frequency up to 9.6kHz @ 3V
- 87dB dynamic range @ 3V
- Filter bandwidths: 0.425 x the sampling frequency
- On-chip reference voltage
- Single power supply range: 2.7 to 5.5V
- Low power consumption: less than 30mW operating power at 3V
- Stand-by mode power consumption: less than 3µW at 3V
- Programming sampling frequency
- Max. sampling frequency: 45kHz
- Synchronous serial interface for processor data exchange, compatible with master or slave operations
- 0.50µm CMOS process
- TQFP44 package
- STLC7546 mode of operation compatible

Application Scenarios

The TLC7725IDRG4 is suitable for various applications, including:
- Modems up to 56Kbps
- Hand Held PCs (HPC)
- Personal Digital Assistants (PDA)
- Webphones
- Network Computers
- Set Top Boxes for Digital Television (Satellite and Cable)

Comparison

- Wide range of compatible applications
- Low power consumption
- High signal to noise ratio and dynamic range
- On-chip reference voltage
- Synchronous serial interface for processor data exchange

- Limited maximum sampling frequency
- Limited filter bandwidths
- Limited operating voltage range (2.7 to 5.5V)