LT1997-3: Precision, Wide Voltage Range Gain Selectable Amplifier

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The amplifier features a 60μV maximum input offset voltage and a –3dB bandwidth of 1.1MHz (Gain = 1). The LT1997-3 operates from any supply voltage from 3.3V to 50V and draws only 350μA supply current. The output typically swings to within 100mV of either supply rail.

The resistors maintain their excellent matching over temperature; the matching temperature coefficient is guaranteed less than 1ppm/°C. The resistors are extremely linear with voltage, resulting in a gain nonlinearity of less than 2ppm. The LT1997-3 is fully specified at 5V and ±15V supplies and from –40°C to 125°C. The device is available in space saving 16-lead MSOP and 4mm × 4mm DFN14 packages.

Features and Benefits:

- Pin Configurable as a Difference Amplifier, Inverting Amplifier or Noninverting Amplifier
- 91dB Minimum DC CMRR (Gain = 1)
- 65dB AC CMRR (at 100kHz, Gain = 1)
- 0.006% (60ppm) Maximum Gain Error (Gain = 1)
- 1ppm/°C Maximum Gain Error Drift
- 2ppm Maximum Gain Nonlinearity
- ±160V Common Mode Voltage Range
- Wide Supply Voltage Range: 3.3V to 50V
- Rail-to-Rail Output
- 350µA Supply Current
- 60µV Maximum Op Amp Offset Voltage
- 1.1MHz –3dB Bandwidth (Gain = 1)
- Low-Power Shutdown: 20µA
- Space-Saving MSOP and DFN Packages

Applications:

- High Side or Low Side Current Sensing
- Bidirectional Wide Common Mode Range Current Sensing
- High Voltage to Low Voltage Level Translation
- Industrial Data-Acquisition Front-Ends
- Replacement for Isolation Circuits
- Differential to Single-Ended Conversion

Product Lifecycle: Recommended for new designs. This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.