ADS774H_13 Datasheet, PDF (1/27 Pages) Texas Instruments – Microprocessor-Compatible Sampling CMOS ANALOG-TO-DIGITAL CONVERTER

ADS774x
ADS774x
ADS774H
www.ti.com ................................................................................................................................................................................................ SBAS443 – AUGUST 2009
Microprocessor-Compatible Sampling
CMOS ANALOG-TO-DIGITAL CONVERTER
FEATURES
1
•2 Drop-In Replacement for the ADS774
• Complete Sampling ADC with Reference,
Clock, and Microprocessor Interface
• Fast Acquisition and Conversion: 8.5µs Max
Over Temperature
• Eliminates External Sample/Hold in Most
Applications
• Ensured AC and DC Performance
• Single +5V Supply Operation
• Low Power: 120mW Max
• Package Options: SO, 0.6in and 0.3in DIPs⁽¹⁾
APPLICATIONS
• Medical Instrumentation
• Data Acquisition Systems
• Robotics
• Industrial Control
• Test Equipment
• Digital Signal Processing
• DSP Servo Control
Control
Inputs
Bipolar
Offset
20V Range
10V Range
2.5V Reference
Input
2.5V Reference
Output
CDAC
DESCRIPTION
The ADS774H is a 12-bit, successive-approximation
analog-to-digital converter (ADC) that uses an
innovative capacitor array (CDAC) implemented in
low-power CMOS technology. This device is a drop-in
replacement for the ADS774, with internal sampling,
much lower power consumption, and the ability to
operate from a single +5V supply.
The ADS774H is complete with an internal clock,
microprocessor interface, three-state outputs, and
internal scaling resistors for input ranges of 0V to
+10V, 0V to +20V, ±5V, or ±10V. The maximum
throughput time is 8.5µs over the full operating
temperature range, including both acquisition and
conversion.
Complete user control over the internal sampling
function facilitates elimination of external sample/hold
amplifiers in most existing designs.
The ADS774H requires +5V, with –15V optional. No
+15V supply is required. Packages include a 28-pin
SO, and 0.3in-wide or 0.6in-wide 28-pin DIPs⁽¹⁾.
(1) DIP-28 package is product preview.
Control Logic
Status
Clock
Comparator
Successive
Approximation
Register
2.5V
Reference
Parallel
Data
Output
1
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2
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information 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.
Copyright © 2009, Texas Instruments Incorporated