ISL28271_07 Datasheet, PDF (1/14 Pages) Intersil Corporation – Dual Micropower, Single Supply, Rail-to- Rail Input and Output (RRIO) Instrumentation Amplifier

®
Data Sheet
ISL28271, ISL28272
August 17, 2007
FN6390.2
Dual Micropower, Single Supply, Rail-to-
Rail Input and Output (RRIO)
Instrumentation Amplifier
The ISL28271 and ISL28272 are dual micropower
instrumentation amplifiers (in-amps) optimized for single
supply operation over the +2.4V to +5.5V range.
Both devices feature an Input Range Enhancement Circuit
(IREC) which maintains CMRR performance for input
voltages equal to the positive and negative supply rails. The
input signal is capable of swinging 10% above the positive
supply rail and to 100mV below the negative supply with only
a slight degradation of the CMRR performance. The output
operation is rail-to-rail.
The ISL28271 is compensated for a minimum gain of 10 or
more. For higher gain applications, the ISL28272 is
compensated for a minimum gain of 100. The in-amps have
CMOS input devices for maximum input common voltage
range. The amplifiers can be operated from one lithium cell
or two Ni-Cd batteries.
Ordering Information
PART NUMBER
(Note)
PART
PACKAGE
MARKING (Pb-free) PKG. DWG. #
ISL28271FAZ*
28271 FAZ 16 Ld QSOP MDP0040
ISL28272FAZ*
28272 FAZ 16 Ld QSOP MDP0040
ISL28271INEVAL1Z Evaluation Platform
ISL28272INEVAL1Z Evaluation Platform
*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
• 120µA typical supply current for both channels
• 30pA max input bias current
• 100dB CMRR, PSRR
• 0.7µV/°C offset voltage temperature coefficient
• 180kHz 3dB Bandwidth - ISL28271
• 100kHz 3dB Bandwidth - ISL28272
• 0.5V/µs slew rate
• Single supply operation
• Rail-to-rail input and output (RRIO)
• Input is capable of swinging above V+ and below V-
(ground sensing)
• 0.081%1 typical gain error - ISL28271
• -0.19%1 typical gain error - ISL28272
• Pb-free available (RoHS compliant)
Applications
• Battery- or solar-powered systems
• Strain gauge
• Sensor signal conditioning
• Medical devices
• Industrial instrumentations
Related Literature
• AN1290, ISL2827xINEVAL1Z Evaluation Board User’s
Guide
• AN1298, Instrumentation Amplifier Application Note
Pinout
ISL28271, ISL28272
(16 LD QSOP)
TOP VIEW
NC 1
OUT_A 2
FB+_A 3 _{+ -}
FB-_A 4
IN-_A 5
IN+_A 6
EN_A 7
V- 8
16 V+
15 OUT_B
-+
14 FB+_B
13 FB-_B
12 IN-_B
11 IN+_B
10 EN_B
9 NC
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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