ADC0805
器件描述：8-BIT ANALOG-TO-DIGITAL CONVERTERS WITH DIFFERENTIAL INPUTS
器件厂商：TI [Texas Instruments]
厂商主页：http://www.ti.com/
文件大小：109.29KB，共7页
Sponsor by e络盟器件资料摘要：
ADC0803, ADC0805
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH DIFFERENTIAL INPUTS
SLAS034 – NOVEMBER 1983 – REVISED SEPTEMBER 1986
1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
C0068 8-Bit Resolution
C0068 Ratiometric Conversion
C0068 100-µs Conversion Time
C0068 135-ns Access Time
C0068 Guaranteed Monotonicity
C0068 High Reference Ladder Impedance
8 kΩ Typical
C0068 No Zero Adjust Requirement
C0068 On-Chip Clock Generator
C0068 Single 5-V Power Supply
C0068 Operates With Microprocessor or as
Stand-Alone
C0068 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 V
CC
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.
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CS
RD
WR
CLK IN
INTR
IN+
IN–
ANLG GND
REF/2
DGTL GND
V
CC
(OR REF)
CLK OUT
DB0 (LSB)
DB1
DB2
DB3
DB4
DB5
DB6
DB7 (MSB)
N PACKAGE
(TOP VIEW)
DATA
OUTPUTS
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH DIFFERENTIAL INPUTS
SLAS034 – NOVEMBER 1983 – REVISED SEPTEMBER 1986
1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
C0068 8-Bit Resolution
C0068 Ratiometric Conversion
C0068 100-µs Conversion Time
C0068 135-ns Access Time
C0068 Guaranteed Monotonicity
C0068 High Reference Ladder Impedance
8 kΩ Typical
C0068 No Zero Adjust Requirement
C0068 On-Chip Clock Generator
C0068 Single 5-V Power Supply
C0068 Operates With Microprocessor or as
Stand-Alone
C0068 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 V
CC
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.
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
CS
RD
WR
CLK IN
INTR
IN+
IN–
ANLG GND
REF/2
DGTL GND
V
CC
(OR REF)
CLK OUT
DB0 (LSB)
DB1
DB2
DB3
DB4
DB5
DB6
DB7 (MSB)
N PACKAGE
(TOP VIEW)
DATA
OUTPUTS