®
ADS7800
12-Bit 3
µ
s Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q
333k SAMPLES PER SECOND
q
STANDARD
±
10V AND
±
5V INPUT
RANGES
q
DC PERFORMANCE OVER TEMP:
No Missing Codes
1/2LSB Integral Linearity Error
3/4LSB Differential Linearity Error
q
AC PERFORMANCE OVER TEMP:
72dB Signal-to-Noise Ratio
80dB Spurious-free Dynamic Range
–80dB Total Harmonic Distortion
q
INTERNAL SAMPLE/HOLD, REFERENCE,
CLOCK, AND 3-STATE OUTPUTS
q
POWER DISSIPATION: 215mW max
q
PACKAGE: 24-Pin Single-wide DIP
24-Lead SOIC
DESCRIPTION
The ADS7800 is a complete 12-bit sampling analog-
to-digital converter using state-of-the-art CMOS struc-
tures. It contains a complete 12-bit successive ap-
proximation A/D converter with internal sample/hold,
reference, clock, digital interface for microprocessor
control, and three-state output drivers.
The ADS7800 is specified at a 333kHz sampling rate.
Conversion time is factory set for 2.70µs max over
temperature, and the high speed sampling input stage
insures a total acquisition and conversion time of 3µs
max over temperature. Precision, laser-trimmed scal-
ing resistors provide industry-standard input ranges of
±5V
or
±10V.
AC and DC performance are completely specified.
Two grades based on linearity and dynamic perform-
ance are available to provide the optimum price/
performance fit in a wide range of applications.
The 24-pin ADS7800 is available in plastic and side-
braze hermetic 0.3" wide DIPs, and in an SOIC
package. It operates from a +5V supply and either a
–12V or –15V supply. The ADS7800 is available in
grades specified over 0°C to +70°C and –40°C to
+85°C temperature ranges.
Control
Logic
Clock
SAR
Output
Latches
And
Three
State
Drivers
Comparator
BUSY
±10V
IN
±5V
IN
Internal
Ref
CDAC
2V
Reference
Out
Three
State
Parallel
Output
Data
Bus
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
© 1989 Burr-Brown Corporation
PDS-1018E
Printed in U.S.A. October, 1993
BURR-BROWN [ BURR-BROWN CORPORATION ]
