描述 Description

The ADC0801, ADC0802, ADC0803, ADC0804, and ADC0805 devices are CMOS 8-bit successive approximation converters (ADC) that use a differential potentiometric ladder – similar to the 256R products. These converters are designed to allow operation with the NSC800 and INS8080A derivative control bus with Tri-state output latches directly driving the data bus. These ADCs appear like memory locations or I/O ports to the microprocessor and no interfacing logic is needed.

Differential analog voltage inputs allow increasing the common-mode rejection and offsetting the analog zero input voltage value. In addition, the voltage reference input can be adjusted to allow encoding any smaller analog voltage span to the full 8 bits of resolution.

特性 Features

? Compatible With 8080-μP Derivatives – No Interfacing Logic Needed – Access Time 135 ns
? Easy Interface to All Microprocessors, or Operates as a Stand-Alone Deivce
? Differential Analog Voltage Inputs
? Logic Inputs and Outputs Meet Both MOS and TTL Voltage-Level Specifications
? Works With 2.5-V (LM336) Voltage Reference
? On-Chip Clock Generator
? 0-V to 5-V Analog Input Voltage Range With Single 5-V Supply
? No Zero Adjust Required
? 0.3-Inch Standard Width 20-Pin DIP Package
? 20-Pin Molded Chip Carrier or Small Outline Package
? Operates Ratiometrically or With 5 VDC, 2.5 VDC, or Analog Span Adjusted Voltage Reference
? Key Specifications
? Resolution: 8 Bits
? Total Error: ±1/4 LSB, ±1/2 LSB and ±1 LSB
? Conversion Time: 100 μs