ISL28274 Datasheet, PDF (1/18 Pages) Intersil Corporation – Micropower, Single Supply, Rail-to-Rail Input-Output Instrumentation Amplifier and Precision Operational Amplifier

®
Data Sheet
ISL28274, ISL28474
May 14, 2009
FN6345.3
Micropower, Single Supply, Rail-to-Rail
Input-Output Instrumentation Amplifier
and Precision Operational Amplifier
The ISL28274 is a combination of a micropower
instrumentation amplifier (Amp A) with a low power precision
amplifier (Amp B) in a single package. The ISL28474
consists of two micropower instrumentation amplifiers
(Amp A) and two low power precision amplifiers (Amp B) in a
single package. The amplifiers are optimized for operation at
2.4V to 5V single supplies. Inputs and outputs can operate
rail-to-rail. As with all instrumentation amplifiers, a pair of
inputs provide a high common-mode rejection and are
completely independent from a pair of feedback terminals.
The feedback terminals allow zero input to be translated to
any output offset, including ground. A feedback divider
controls the overall gain of the amplifier. The additional
precision amplifier can be used to generate higher gain, with
smaller feedback resistors or used to generate a reference
voltage.
The instrumentation amp (Amp A) is compensated for a gain
of 100 or more and the precision amp (Amp B) is unity gain
stable. Both amplifiers have PMOS inputs that provide less
than 30pA input bias currents.
The amplifiers can be operated from one lithium cell or two
Ni-Cd batteries. The amplifiers input range goes from below
ground to slightly above positive rail. The output stage
swings completely to ground or positive supply; no pull-up or
pull-down resistors are needed.
Ordering Information
PART NUMBER
(Note)
PART
MARKING
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL28274FAZ*
28274 FAZ
16 Ld QSOP MDP0040
ISL28474FAZ*
ISL28474 FAZ 24 Ld QSOP MDP0040
*Add “-T7” suffix for tape and reel. Please refer to TB347 for details
on reel specifications
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets, molding compounds/die attach
materials, and 100% matte tin plate plus anneal (e3 termination
finish, which is RoHS compliant and compatible with both SnPb and
Pb-free soldering operations). Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J STD-020.
Features
• Combination of IN-AMP and OP-AMP in a Single Package
• 120µA Supply Current for ISL28274
• Input Offset Voltage IN-AMP 500µV Max
• Input Offset Voltage OP-AMP 225µV Max
• 30pA Max Input Bias Current
• 100dB CMRR and PSRR
• Single Supply Operation of 2.4V to 5.0V
• Ground Sensing
• Input Voltage Range is Rail-to-Rail and Output Swings
Rail-to-Rail
• Pb-Free available (RoHS Compliant)
Applications
• 4mA to 20mA Loops
• Industrial Process Control
• Medical Instrumentation
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2006, 2007, 2009. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.