描述 Description

DESCRIPTION
By using a half-flash conversion technique, the 8-bit ADC0820 CMOS A/D offers a 1.5μs conversion time while dissipating a maximum 75mW of power. The half-flash technique consists of 31 comparators, a most significant 4-bit ADC and a least significant 4-bit ADC.
The input to the ADC0820 is tracked and held by the input sampling circuitry, eliminating the need for an external sample-and-hold for signals slewing at less than 100mV/μs.
For ease of interface to microprocessors, the ADC0820 has been designed to appear as a memory location or I/O port without the need for external interfacing logic.FEATURES
? Built-in track-and-hold function
? No missing codes
? No external clocking
? Single supply—5VDC
? Easy interface to all microprocessors, or operates stand-alone
? Latched 3-State outputs
? Logic inputs and outputs meet both MOS and TTL voltage level
?? specifications
? Operates ratiometrically or with any reference value equal to or
?? less than VDD
? 0V to 5V analog input voltage range with single 5V supply
? No zero- or full-scale adjust required
? Overflow output available for cascading
? 0.3″ standard width 20-pin DIPAPPLICATIONS
? Microprocessor-based monitoring and control systems
? Transducer/μP interface
? Process control
? Logic analyzers
? Test and measurement

特性 Features

? Built-in track-and-hold function
? No missing codes
? No external clocking
? Single supply—5VDC
? Easy interface to all microprocessors, or operates stand-alone
? Latched 3-State outputs
? Logic inputs and outputs meet both MOS and TTL voltage level
?? specifications
? Operates ratiometrically or with any reference value equal to or
?? less than VDD
? 0V to 5V analog input voltage range with single 5V supply
? No zero- or full-scale adjust required
? Overflow output available for cascading
? 0.3″ standard width 20-pin DIP

應(yīng)用 Application

? Microprocessor-based monitoring and control systems
? Transducer/μP interface
? Process control
? Logic analyzers
? Test and measurement