ISL28288_11 Datasheet, PDF (1/20 Pages) Intersil Corporation – Digital DC/DC PMBus 12A Module

Dual and Quad Micropower Single Supply Rail-to-Rail
Input and Output (RRIO) Op Amp
ISL28288, ISL28488
The ISL28288 and ISL28488 are dual and quad channel
micropower operational amplifiers optimized for single supply
operation over the 2.4V to 5.5V range. They can be operated
from one lithium cell or two Ni-Cd batteries. For equivalent
performance in a single channel op amp, reference EL8188.
These devices feature an Input Range Enhancement Circuit
(IREC) which enables them to maintain CMRR performance for
input voltages 10% above the positive supply rail and to
100mV below the negative supply. The output operation is
rail-to-rail.
The ISL28288 and ISL28488 draw minimal supply current
while meeting excellent DC-accuracy, AC-performance, noise
and output drive specifications. The ISL28288 (10 Ld MSOP
only) contains a power-down enable pin that reduces the
power supply current to typically less than 4µA in the disabled
state.
Related Literature
AN1344: ISL2828xEVAL1Z Evaluation Board User’s Guide
Features
• Low power 60µA typical supply current per amplifier
• 1.5mV max offset voltage
• 30pA max input bias current
• 250kHz typical gain-bandwidth product
• 105dB typical PSRR
• 100dB typical CMRR
• Single supply operation down to 2.4V
• Input is capable of swinging above V₊ and below V_- (ground
sensing)
• Rail-to-rail input and output (RRIO)
• Enable Pin - ISL28288 10 Ld MSOP package option only
• Pb-free (RoHS compliant)
Applications
• Battery- or solar-powered systems
• 4mA to 25mA current loops
• Handheld consumer products
• Medical devices
• Thermocouple amplifiers
• Photodiode pre-amps
• pH probe amplifiers
V₊
VIN
+U1A
1/2
ISL28x88
-
0.082µF
V₊
C3
R3
12.4k
U1B+
1/2
ISL28x8-8
R4
2.21k
CF1
4.7µF
R1
10k
RF1
680k
BANDPASS AMPLIFIER (0.05Hz TO 159Hz)
VOUT
C1
0.1µF
GAIN=425
R2
158Ω
VREF
FIGURE 1. TYPICAL APPLICATION CIRCUIT
July 26, 2011
FN6339.4
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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