ISL28271 Datasheet, PDF (1/14 Pages) Intersil Corporation – Dual Micropower, Single Supply, Rail-to- Rail Input and Output (RRIO) Instrumentation Amplifier

®
Data Sheet
ISL28271, ISL28272
December 8, 2006
FN6390.0
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 low 2.4V
to 5V single supplies.
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 PART
TAPE & PACKAGE PKG.
(Note)
MARKING REEL (Pb-Free) DWG. #
ISL28271FAZ
(Note)
28271 FAZ 97/Tube 16 Ld QSOP MDP0040
(Pb-free)
ISL28271FAZ-T7 28271 FAZ
7” 16 Ld QSOP MDP0040
(Note)
(1000 pcs) (Pb-free)
ISL28272FAZ
(Note)
28272 FAZ 97/Tube 16 Ld QSOP MDP0040
(Pb-free)
ISL28272FAZ-T7 28272 FAZ
7” 16 Ld QSOP MDP0040
(Note)
(1000 pcs) (Pb-free)
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100% matte
tin plate termination finish, which are 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 plus anneal available (RoHS compliant)
Applications
• Battery- or solar-powered systems
• Strain gauge
• Sensor signal conditioning
• Medical devices
• Industrial instrumentations
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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