ISL28134IBZ Datasheet, PDF (1/25 Pages) Intersil Corporation – 5V Ultra Low Noise, Zero Drift Rail-to-Rail Precision Op Amp

5V Ultra Low Noise, Zero Drift Rail-to-Rail Precision
Op Amp
ISL28134
The ISL28134 is a single, chopper-stabilized Zero-Drift
operational amplifier optimized for single and dual supply
operation from 2.25V to 6.0V and ±1.125V and ±3.0V. The
ISL28134 uses auto-correction circuitry to provide very low input
offset voltage, drift and a reduction of the 1/f noise corner below
0.1Hz. The ISL28134 achieves ultra low offset voltage, offset
temperature drift, wide gain bandwidth and rail-to-rail
input/output swing while minimizing power consumption.
The ISL28134 is ideal for amplifying the sensor signals of analog
front-ends that include pressure, temperature, medical, strain
gauge and inertial sensors down to the µV levels.
The ISL28134 can be used over standard amplifiers with high
stability over the industrial temperature range of -40°C to +85°C
and the full industrial temperature range of -40°C to +125°C.
The ISL28134 is available in an industry standard pinout SOIC
and SOT-23 packages.
Applications
• Medical Instrumentation
• Sensor Gain Amps
• Precision Low Drift, Low Frequency ADC Drivers
• Precision Voltage Reference Buffers
• Thermopile, Thermocouple, and other Temperature Sensors
Front-end Amplifiers
• Inertial Sensors
• Process Control Systems
• Weight Scales and Strain Gauge Sensors
Features
• Rail-to-Rail Inputs and Outputs
- CMRR @ V_CM = 0.1V beyond V_S . . . . . . . . . . . . .135dB, typ.
- V_OH and V_OL . . . . . . . . . . . . . . . . . . . . . . 10mV from V_S, typ.
• No 1/f Noise Corner Down to 0.1Hz
- Input Noise Voltage . . . . . . . . . . . . . . . . .10 nV/√Hz @ 1kHz
- 0.1Hz to 10Hz Noise Voltage . . . . . . . . . . . . . . . . 250nV_P-P
• Low Offset Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5µV, Max
• Superb Offset Drift . . . . . . . . . . . . . . . . . . . . . . . 15nV/°C, Max
• Single Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.25V to 6.0V
• Dual Supply . . . . . . . . . . . . . . . . . . . . . . . . . ±1.125V to ±3.0V
• Low I_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .675µA, typ.
• Wide Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5MHz
• Operating Temperature Range
- Industrial . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
- Full Industrial . . . . . . . . . . . . . . . . . . . . . . .-40°C to +125°C
• Packaging
- Single: SOIC, SOT-23, µTDFN (1.6mmx1.6mm)
Related Literature
• See AN1641, “ISL28134 Evaluation Board Manual”
• See AN1560, “Making Accurate Voltage Noise and Current
Noise Measurements on Operational Amplifiers Down to
0.1Hz”
BRIDGE
SENSOR
5mV/V
+3.3V
ISL21010 ^+5V
3.3V V_REF
100
100
1MΩ
20kΩ
-
+
R_L
ISL28134
V_OUT
C_L
FIGURE 1. PRECISION 10-BIT WEIGH SCALE/STRAIN GAUGE
1600
1400
1200
1000
V_s = ±2.5V
V_CM = 0V
T = -40°C to +125°C
N = 2796
800
600
400
200
0
-2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5
V_OS (µV)
FIGURE 2. V_OS HISTOGRAM V_S = 5V
December 22, 2011
1
FN6957.3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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