®
ADS574
ADS
574
ADS
574
ADS
574
Microprocessor-Compatible Sampling
CMOS ANALOG-TO-DIGITAL CONVERTER
FEATURES
DESCRIPTION
q REPLACES ADC574 FOR NEW DESIGNS
q COMPLETE SAMPLING A/D WITH
REFERENCE, CLOCK AND
MICROPROCESSOR INTERFACE
q FAST ACQUISITION AND CONVERSION:
25µs max
q ELIMINATES EXTERNAL SAMPLE/HOLD
IN MOST APPLICATIONS
q GUARANTEED AC AND DC PERFORMANCE
The ADS574 is a 12-bit successive approximation
analog-to-digital converter using an innovative
capacitor array (CDAC) implemented in low-power
CMOS technology. This is a drop-in replacement for
ADC574 models in most applications, with internal
sampling, much lower power consumption, and capability to operate from a single +5V supply.
The ADS574 is complete with 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
for 12-bit conversions is 25µs over the full operating
temperature range, including both acquisition and conversion.
q SINGLE +5V SUPPLY OPERATION
q LOW POWER: 100mW max
q PACKAGE OPTIONS: 0.6" and 0.3" DIPs,
SOIC
Complete user control over the internal sampling function facilitates elimination of external sample/hold
amplifiers in most existing designs.
The ADS574 requires +5V, with –12V or –15V optional, depending on usage. No +15V supply is required. Available packages include 0.3" or 0.6" wide
28-pin plastic DIPs and 28-lead SOICs.
Status
Control
Inputs
20V Range
10V Range
2.5V Reference
Input
CDAC
Clock
–
Successive
Approximation
Register
+
Comparator
2.5V Reference
Output
Three-State Buffers
Bipolar Offset
Control Logic
Parallel
Data
Output
2.5V
Reference
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
© 1991 Burr-Brown Corporation
PDS-1104F
Printed in U.S.A. July, 1993
