ADS7822
DESCRIPTION
The ADS7822 is a 12-bit sampling analog-to-digital (A/D)
converter with ensured specifications over a 2.7V to 5.25V
supply range. It requires very little power even when oper-
ating at the full 75kHz rate. At lower conversion rates, the
high speed of the device enables it to spend most of its time
in the power-down mode—the power dissipation is less than
60µW at 7.5kHz.
The ADS7822 also features operation from 2.0V to 5V, a
synchronous serial interface, and a pseudo-differential input.
The reference voltage can be set to any level within the
range of 50mV to V
CC
.
Ultra low power and small size make the ADS7822 ideal for
battery-operated systems. It is also a perfect fit for remote
data acquisition modules, simultaneous multi-channel sys-
tems, and isolated data acquisition. The ADS7822 is avail-
able in a plastic mini-DIP-8, an SOIC-8, or an MSOP-8
package.
12-Bit, High-Speed, 2.7V microPower Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
a71 75kHz SAMPLING RATE
a71 MICRO POWER:
0.54mW at 75kHz
0.06mW at 7.5kHz
a71 POWER DOWN: 3µA max
a71 MINI-DIP-8, SOIC-8, AND MSOP-8
a71 PSEUDO-DIFFERENTIAL INPUT
a71 SERIAL INTERFACE
SAR Control
Serial
Interface
D
OUT
ComparatorS/H Amp
CS/SHDN
DCLOCK
+In
V
REF
–In
CDAC
APPLICATIONS
a71 BATTERY-OPERATED SYSTEMS
a71 REMOTE DATA ACQUISITION
a71 ISOLATED DATA ACQUISITION
a71 SIMULTANEOUS SAMPLING,
MULTI-CHANNEL SYSTEMS
OPA658
A
D
S
7
8
2
2
AD
S7
82
2
SBAS062A – JANUARY 1996 – REVISED MARCH 2005
www.ti.com
PRODUCTION DATA information is 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 © 1996-2005, Texas Instruments Incorporated
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