Dual and Quad Micropower Chopper Stabilized, RRIO
Operational Amplifiers
ISL28233, ISL28433
Features
The ISL28233 and ISL28433 are dual and quad micropower,
chopper stabilized operational amplifiers that are optimized for
single and dual supply operation from 1.8V to 6.0V and ±0.825V
to ±3.0V. Their low supply current of 18µA and wide input range
enable the ISL28233, ISL28433 to be excellent general purpose
op amps for a wide range of applications. The ISL28233 and
ISL28433 are ideal for handheld devices that operate off 2 AA or
single Li-ion batteries.
• Low Input Offset Voltage. . . . . . . . . . . . . . . . . . . . . . 6µV, Max.
• Low Offset Drift . . . . . . . . . . . . . . . . . . . . . . . 0.05µV/°C, Max.
• Quiescent Current (Per Amplifier) . . . . . . . . . . . . . .18µA, Typ.
• Single Supply Range . . . . . . . . . . . . . . . . . . . . .+1.8V to +6.0V
• Dual Supply Range. . . . . . . . . . . . . . . . . . . . ±0.825V to ±3.0V
• Low Noise (0.01Hz to 10Hz) . . . . . . . . . . . . . . . . . 1.0µV , Typ.
P-P
• Rail-to-Rail Inputs and Output
The ISL28233 is available in 8 Ld MSOP, 8 Ld SOIC and 8 Ld DFN
packages. The ISL28433 is available in 14 Ld TSSOP, 14 Ld SOIC
and 14 Ld 3mmx4mm TDFN packages. All devices operate over
the temperature range of -40°C to +125°C.
• Input Bias Current . . . . . . . . . . . . . . . . . . . . . . . . .180pA, Max.
• Operating Temperature Range . . . . . . . . . . . .-40°C to +125°C
Applications
Related Literature
• Bi-Directional Current Sense
• Temperature Measurement
• Medical Equipment
• See AN1596, “ISL28233SOICEVAL1Z Evaluation Board User’s
Guide”
• See AN1575, “ISL28433SOICEVAL1Z, ISL28433TSSOPEVAL1Z
Evaluation Board User’s Guide”
• Electronic Weigh Scales
• Precision/Strain Gauge Sensor
• Precision Regulation
• Low Ohmic Current Sense
• High Gain Analog Front Ends
Typical Application
V
vs Temperature
OS
V
4
3
+
I-SENSE+
+1.8V TO +6.0V
V
REF
499k
2
1
4.99k
4.99k
+
-
V+
V-
V
SENSE
OUT
0
0.1
499k
-1
-2
-3
-4
GND
I-SENSE-
-50
-25
0
25
50
75
100
125
TEMPERATURE (°C)
BI-DIRECTIONAL CURRENT SENSE AMPLIFIER
July 26, 2011
FN7692.3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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