ISL28134_14 Datasheet, PDF (1/25 Pages) Intersil Corporation – 5V Ultra Low Noise, Zero Drift Rail-to-Rail Precis Op Amp

DATASHEET
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 across 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 at 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 . . . . . . . . . . . . . . . . . 10nV/Hz at 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
Related Literature
• AN1641, “ISL28134SOICEVAL1Z Evaluation Board User’s
Guide”
• AN1560, “Making Accurate Voltage Noise and Current Noise
Measurements on Operational Amplifiers Down to 0.1Hz”
+5
350^Ω
350_Ω
350^Ω
ISL28134
ISL22316
+
50Ω
-
50kΩ
DCP
- ^50kΩ 50Ω
+
ISL28134
ISL26102
24-BIT ADC
ISL21010
5V VREF
FIGURE 1. PRECISION WEIGH SCALE / STRAIN GAUGE
1600
1400
1200
1000
VV_sCM=
±2.5V
= 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
FIGURE 2. V_OS HISTOGRAM V_S = 5V
October 14, 2014
1
FN6957.6
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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