Application NoteAnalog
Interfacing the AD7870/AD7875 to the TMS320C25 DSP
Technical guide for interfacing AD7870 and AD7875 12-bit ADCs with the TMS320C25 DSP, covering both parallel and serial communication methods.
Overview
This application note details the hardware and software requirements for interfacing Analog Devices AD7870 and AD7875 12-bit sampling Analog-to-Digital Converters with the Texas Instruments TMS320C25 Digital Signal Processor. The document outlines configurations for both parallel and serial interfacing, providing circuit diagrams, timing analysis, and sample assembly code. It explains how to utilize external logic, such as the 74HC138 for address decoding and 74HC00 for gate logic, to ensure proper signal synchronization for high-speed data conversion in DSP-based systems.
Use Cases
- Digital Signal Processing
- High-speed Data Acquisition
- Embedded System Interfacing
- Industrial Control Systems
Topics
AD7870
AD7875
TMS320C25
ADC
DSP
Analog-to-Digital Converter
Digital Signal Processor
Parallel Interface
Serial Interface
74HC138
74HC00
Referenced Parts
| AD7870 | Analog Devices | Interfacing the AD7870/AD7875 to the TMS320C25 |
| AD7875 | Analog Devices | Interfacing the AD7870/AD7875 to the TMS320C25 |
| TMS320C25 | Texas Instruments | Interfacing the AD7870/AD7875 to the TMS320C25 |
| 74HC00 | Texas Instruments | decoded using a 74HC138 and a 74HC00 gate |
| 74HC138 | Texas Instruments | The address is decoded using a 74HC138 |