®
FPO
ADS
783
1
ADS7831
ADS
783
1
12-Bit 600kHz Sampling CMOS
ANALOG-to-DIGITAL CONVERTER
FEATURES
q
600kHz THROUGHPUT RATE
q
STANDARD
±
2.5V INPUT RANGE
q
69dB min SINAD WITH 250kHz INPUT
q
COMPLETE WITH S/H, REF, CLOCK, ETC.
q
PARALLEL DATA w/LATCHES
q
FULLY SPECIFIED –40
°
C TO +85
°
C
q
15MHz –3dB BANDWIDTH
q
28-PIN 0.3" PDIP AND SOIC
DESCRIPTION
The ADS7831 is a complete 12-bit sampling A/D
using state-of-the-art CMOS structures. It contains a
complete 12-bit capacitor-based SAR A/D with inher-
ent S/H, reference, clock, interface for microprocessor
use, and three-state output drivers.
The ADS7831 is specified at a 600kHz sampling rate,
and guaranteed over the full temperature range. A
±2.5V
input range and excellent Nyquist performance
provide an optimum solution in
±5V
supply systems.
The 28-pin ADS7831 is available in a plastic 0.3" DIP
and in an SOIC, both fully specified for operation over
the industrial –40°C to +85°C range.
FREQUENCY SPECTRUM
(16384 Point FFT; f
IN
= 250kHz, –0.5dB)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
0
THD
SNR
SFDR
2nd Harmonic
3rd Harmonic
:
:
:
:
:
–91dB
72dB
94dB
–98dB
–94dB
Amplitude (dB)
3
2
SFDR: 94dBc
75
150
Frequency (kHz)
225
300
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 • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
®
© 1994 Burr-Brown Corporation
PDS-1275
1
ADS7831
Printed in U.S.A. March, 1995
BURR-BROWN [ BURR-BROWN CORPORATION ]
