ADC0834A Datasheet, PDF (1/13 Pages) Texas Instruments – A/D PERIPHERALS WITH SERIAL CONTROL

ADC0834A, ADC0838A, ADC0834B, ADC0838B
A/D PERIPHERALS WITH SERIAL CONTROL
SLAS007 – AUGUST 1985 – REVISED OCTOBER 1986
• 8-Bit Resolution
• Easy Microprocessor Interface or Stand-
Alone Operation
• Operates Ratiometrically or With 5-V
Reference
• 4- or 8-Channel Multiplexer Options With
Address Logic
• Shunt Regulator Allows Operation With
High-Voltage Supplies
• Input Range 0 to 5 V With Single 5-V
Supply
• Remote Operation With Serial Data Link
• Inputs and Outputs are Compatible With
TTL and MOS
• Conversion Time of 32 µs at
f_clock = 250 kHz
• Designed to Be Interchangeable With
National Semiconductor ADC0834 and
ADC0838
DEVICE
ADC0834
ADC0838
TOTAL UNADJUSTED ERROR
A SUFFIX
B SUFFIX
± 1 LSB
± 1/2 LSB
± 1 LSB
± 1/2 LSB
description
AD0834 . . . N PACKAGE
(TOP VIEW)
V+ ₁
CS ₂
CH0 ₃
CH1 ₄
CH2 ₅
CH3 ₆
DGTL GND ₇
14 V_CC
13 DI
12 ^CLK
11 ^SARS
10 ^DO
9 ^REF
8 ^{ANLG GND}
ADC0838 . . . N PACKAGE
(TOP VIEW)
CH0 ₁
CH1 ₂
CH2 ₃
CH3 ₄
CH4 ₅
CH5 ₆
CH6 ₇
CH7 8
COM 9
DGTL GND 10
20 ^V_CC
19 ^{V +}
18 ^CS
17 ^DI
16 ^CLK
15 ^SARS
14 ^DO
13 SE
12 REF
11 ANLG GND
ADC0838 . . . FN PACKAGE
(TOP VIEW)
These devices are 8-bit successive- approxima-
tion analog-to-digital converters, each with an
input-configurable
multichannel
multi-
plexer and serial input/output. The serial input/
output is configured to interface with standard shift
registers or microprocessors. Detailed informa-
tion on interfacing with most popular microproces-
sors is readily available from the factory.
The ADC0834 (4-channel) and ADC0838
(8-channel) multiplexer is software configured
forsingle-ended or differential inputs as well as
pseudo-differential input assignments. The differ-
ential analog voltage input allows for common-
mode rejection or offset of 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.
CH3
CH4
CH5
CH6
CH7
3 2 1 20 19
4
18
5
17
6
16
7
15
8
14
9 10 11 12 13
CS
DI
CLK
SARS
DO
The ADC0834AC, ADC0834BC, ADC0838AC, and ADC0838BC are characterized for operation from 0°C to
70°C. The ADC0834AI, ADC0834BI, ADC0838AI, and ADC0838BI are characterized for operation from – 40°C
to 85°C.
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1986, Texas Instruments Incorporated
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