The LT1991IDD combines a precision operational amplifier with eight precision resistors to form a one-chip solution for accurately amplifying voltages. Gains from -13 to 14 with a gain accuracy of 0.04% can be achieved using no external components. The device is particularly well suited for use as a difference amplifier, where the excellent resistor matching results in a common mode rejection ratio of greater than 75dB.
The amplifier features a 50µV maximum input offset voltage and a gain bandwidth product of 560kHz. The device operates from any supply voltage from 2.7V to 36V and draws only 100µA supply current on a 5V supply. The output swings to within 40mV of either supply rail.
The resistors have excellent matching, 0.04% over temperature for the 450k resistors. The matching temperature coefficent is guaranteed less than 3ppm/°C. The resistors are extremely linear with voltage, resulting in a gain nonlinearity of less than 10ppm.
The LT1991IDD is fully specified at 5V and ±15V supplies and from -40°C to 85°C. The device is available in space saving 10-lead MSOP and low profile (0.8mm) 3mm × 3mm DFN packages.
Feature
- Pin Configurable as a Difference Amplifier, Inverting and Noninverting Amplifier
- Difference Amplifier
- Gain Range 1 to 13
- CMRR >75dB
- Noninverting Amplifier
- Gain Range 0.07 to 14
- Inverting Amplifier
- Gain Range -0.08 to -13
- Gain Error <0.04%
- Gain Drift < 3ppm/°C
- Wide Supply Range: Single 2.7V to Split ±18V
- Micropower: 100µA Supply Current
- Precision: 50µV Maximum Input Offset Voltage
- 560kHz Gain Bandwidth Product
- Rail-to-Rail Output
- Space Saving 10-Lead MSOP and DFN Packages
Applications
- Handheld Instrumentation
- Medical Instrumentation
- Strain Gauge Amplifiers
- Differential to Single-Ended Conversion
(Picture: Pinout)
