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ADC08131/ADC08134/ADC08138
8-Bit High-Speed Serial I/O A/D Converters with
Multiplexer Options, Voltage Reference, and Track/Hold
Function
General Description
The ADC08131/ADC08134/ADC08138 are 8-bit successive
approximation A/D converters with serial I/O and config-
urable input multiplexers with up to 8 channels. The serial
I/O is configured to comply with the NSC MICROWIRE
™
serial data exchange standard for easy interface to the
COPS
™
family of controllers, and can easily interface with
standard shift registers or microprocessors.
All three devices provide a 2.5V band-gap derived reference
with guaranteed performance over temperature.
Atrack/hold function allows the analog voltage at the positive
input to vary during the actual A/D conversion.
The analog inputs can be configured to operate in various
combinations of single-ended, differential, or
pseudo-differential modes. In addition, input voltage spans
as small as 1V can be accommodated.
Applications
n Digitizing automotive sensors
n Process control/monitoring
n Remote sensing in noisy environments
n Embedded diagnostics
Features
n Serial digital data link requires few I/O pins
n Analog input track/hold function
n 4- or 8-channel input multiplexer options with address
logic
n On-chip 2.5V band-gap reference (
±
2% over
temperature guaranteed)
n No zero or full scale adjustment required
n TTL/CMOS input/output compatible
n 0V to 5V analog input range with single 5V power
supply
Key Specifications
n Resolution 8 Bits
n Conversion time (f
C
= 1 MHz) 8 µs (Max)
n Power dissipation 20 mW (Max)
n Single supply 5 V
DC
(
±
5%)
n Total unadjusted error
±
1
⁄
2
LSB and
±
1 LSB
n Linearity Error (V
REF
= 2.5V)
±
1
⁄
2
LSB
n No missing codes (over temperature)
n On-board Reference +2.5V
±
1.5% (Max)
Ordering Information
Industrial Package
(−40˚C ≤ T
A
≤ +85˚C)
ADC08131CIWM M14B
ADC08134CIWM M14B
ADC08138CIWM M20B
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
COPS
™
microcontrollers and MICROWIRE
™
are trademarks of National Semiconductor Corporation.
June 1999
ADC08131/ADC08134/ADC08138 8-Bit High-Speed Serial I/O A/D Converters with Multiplexer
Options, Voltage Reference, and Track/Hold Function
© 2001 National Semiconductor Corporation DS010749 www.national.com
Verzeichnis
- ・ Abmessungen des Paketumrisses on Seite 20 Seite 21
- ・ Teilenummerierungssystem on Seite 1
- ・ Blockdiagramm on Seite 5 Seite 6 Seite 11 Seite 13
- ・ Beschreibung der Funktionen on Seite 1 Seite 12 Seite 13 Seite 14 Seite 15
- ・ Technische Daten on Seite 1 Seite 3 Seite 5
- ・ Anwendungsbereich on Seite 1 Seite 16 Seite 17 Seite 18 Seite 19
- ・ Elektrische Spezifikation on Seite 3 Seite 4 Seite 5 Seite 7 Seite 8
