Texas Instruments ADC0803, ADC0805 - 8-Bit Analog-to-Digital Converters with Differential Inputs Data Sheet User Manual
Summary
This comprehensive guide details the robust ADC0803 series, an 8-bit Successive Approximation Register (SAR) Analog-to-Digital Converter (ADC). Engineered for microprocessor integration, this device accurately digitizes bipolar analog voltages via a differential input. The manual provides critical specifications on interfacing, including operational parameters, clock generation methods, and temperature grades (-40°C to 85°C available). Ideal for electrical engineers and developers requiring reliable data acquisition solutions that need seamless integration with standard microcontroller control buses.
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查询ADC0803供应商 ADC0803, ADC0805
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH DIFFERENTIAL INPUTS SLAS034 – NOVEMBER 1983 – REVISED SEPTEMBER 1986
8-Bit Resolution
N PACKAGE
Ratiometric Conversion
(TOP VIEW)
100-µs Conversion Time 135-ns Access Time CS VCC (OR REF)
Guaranteed Monotonicity RD CLK OUT WR DB0 (LSB)
High Reference Ladder Impedance
CLK IN DB1
8 kΩ Typical
INTR DB2
No Zero Adjust Requirement
IN+ DB3 DATA
On-Chip Clock Generator OUTPUTS
IN– DB4 Single 5-V Power Supply ANLG GND DB5 REF/2 DB6
Operates With Microprocessor or as
DGTL GND DB7 (MSB)
Stand-Alone Designed to Be interchangeable With National Semiconductor and Signetics ADC0803 and ADC0805
description The ADC0803 and ADC0805 are CMOS 8-bit, successive-approximation, analog-to-digital converters that use a modified potentiometric (256R) ladder. These devices are designed to operate from common microprocessor control buses with the 3-state output latches driving the data bus. The devices can be made to appear to the microprocessor as a memory location or an I/O port. Detailed information on interfacing to most popular microprocessors is readily available from the factory. A differential analog voltage input allows increased common-mode rejection and offset of the zero-input analog voltage value. Although a reference input (REF/2) is available to allow 8-bit conversion over smaller analog voltage spans or to make use of an external reference, ratiometric conversion is possible with the REF/2 input open. Without an external reference, the conversion takes place over a span from VCC to ANLG GND. The devices can operate with an external clock signal or with an additional resistor and capacitor, using an on-chip clock generator. The ADC0803C and ADC0805C are characterized for operation from 0°C to 70°C. The ADC0803I and ADC0805I are characterized for operation from –40°C to 85°C.
Copyright 1986, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Page Summary Contents For Texas Instruments ADC0803, ADC0805 - 8-Bit Analog-to-Digital Converters with Differential Inputs Data Sheet User Manual
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 7 |
| File Size | 100.46 KB |
| Published | July 15, 2026 |
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Frequently Asked Questions
What is the operating temperature range for this device?
The ADC080_C operates from 0°C to 70°C, while the ADC080_I operates from –40°C to 85°C.
Is ratiometric conversion possible?
Yes, ratiometric conversion is possible by leaving the REF/2 input open.
How does the device communicate with a microprocessor?
The devices drive the data bus using 3-state output latches and can be made to appear as a memory location or an I/O port.
What is the typical conversion time?
It has a guaranteed 100-μs conversion time.
Does it require an external reference voltage?
No, although an external REF/2 input can be used, ratiometric conversion is possible without one.