8051
Intel
Figure 1 shows a 4 wire interface to the popular Intel 8051.
Design DocumentAnalog
Data Acquisition Systems Communicate with Microprocessors Over 4 Wires – Design Note 1
Design note for the LTC1090 family of 10-bit data acquisition systems featuring a 4-wire serial interface for communication with microprocessors like the Intel 8051.
Overview
This document introduces the LTC1090 family of 10-bit data acquisition circuits, focusing on their 4-wire serial interface designed to minimize pin counts and board space. The LTC1090 features software-configurable analog circuitry, including an 8-channel multiplexer, sample-and-hold, and bipolar/unipolar conversion modes. It supports communication with various microprocessor (MPU) serial formats such as SPI and MICROWIRE, as well as MPUs without dedicated serial ports like the Intel 8051. The design note details hardware configurations using the LT1009 voltage reference, performance characteristics including ±0.5LSB linearity, and methods for transmitting digital data from remote sensors through noisy environments.
Use Cases
- Remote sensor data transmission through noisy media
- Reducing interconnect lines between microprocessors and peripherals
- Multi-channel analog-to-digital conversion in space-constrained designs
- Interfacing high-resolution ADCs with microprocessors lacking hardware serial ports
Topics
LTC1090
LTC1091
LT1009
Intel 8051
TMS7000
10-bit ADC
Data Acquisition System
Serial Interface
Analog Multiplexer
Remote Sensing
Referenced Parts
LT1009
Linear Technology
The span of the A/D converter is set by the reference inputs which, in this case, are driven by a 2.5V LT1009
LTC1090
Linear Technology
Figure 1 shows a typical hookup of the LTC1090, the first member of this data acquisition family.
LTC1091
Linear Technology
LTC1090 family members are complete systems being offered in packages ranging from 20 pins to 8 pins (e.g., LTC1091).
TMS7000
Texas Instruments
TI TMS7000 Serial Port
| 8051 | Intel | Figure 1 shows a 4 wire interface to the popular Intel 8051. |
| LT1009 | Linear Technology | The span of the A/D converter is set by the reference inputs which, in this case, are driven by a 2.5V LT1009 |
| LTC1090 | Linear Technology | Figure 1 shows a typical hookup of the LTC1090, the first member of this data acquisition family. |
| LTC1091 | Linear Technology | LTC1090 family members are complete systems being offered in packages ranging from 20 pins to 8 pins (e.g., LTC1091). |
| TMS7000 | Texas Instruments | TI TMS7000 Serial Port |