Overview
The LMP2022MM/NOPB, produced by Texas Instruments, is a dual precision operational amplifier that offers ultra-low input offset voltage, near-zero input offset voltage drift, and very low input voltage noise. It is part of the LMP™ precision family and is ideal for instrumentation and sensor interfaces. The LMP2022 features proprietary continuous auto-zero correction circuitry, which ensures impressive common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR), removes the 1/f noise component, and eliminates the need for calibration in many circuits. This amplifier is suitable for high accuracy applications such as precision instrumentation, battery-powered instrumentation, thermocouple amplifiers, and bridge amplifiers.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Offset Voltage (Max) | ±5 µV | µV |
| Input Offset Voltage Drift (Typical) | –0.004 µV/°C | µV/°C |
| Input Offset Voltage Drift (Max) | ±0.02 µV/°C | µV/°C |
| Input Voltage Noise, AV = 1000 | 11 nV/√Hz | nV/√Hz |
| Open Loop Gain | 160 dB | dB |
| CMRR | 139 dB | dB |
| PSRR | 130 dB | dB |
| Supply Voltage Range | 2.2 V to 5.5 V | V |
| Supply Current (per Amplifier) | 1.1 mA | mA |
| Input Bias Current | ±25 pA | pA |
| Gain Bandwidth Product (GBW) | 5 MHz | MHz |
| Slew Rate | 2.6 V/µs | V/µs |
| Operating Temperature Range | −40°C to 125°C | °C |
| Packages | 8-Pin VSSOP, 8-Pin SOIC |
Key Features
- Ultra-low input offset voltage and near-zero input offset voltage drift.
- Very low input voltage noise with no 1/f noise component.
- High open loop gain of 160 dB, reducing gain error in high gain applications.
- Proprietary continuous auto-zero correction circuitry for high CMRR and PSRR.
- Low supply current of 1.1 mA per amplifier.
- Wide supply voltage range from 2.2 V to 5.5 V.
- Operating temperature range from −40°C to 125°C.
- Available in 8-Pin VSSOP and 8-Pin SOIC packages.
Applications
- Precision instrumentation amplifiers.
- Battery-powered instrumentation.
- Thermocouple amplifiers.
- Bridge amplifiers.
- Position sensors, bridge sensors, and pressure sensors.
- Medical equipment and other high accuracy applications.
- Industrial precision weigh scales and other low-frequency applications.
Q & A
- What is the maximum input offset voltage of the LMP2022?
The maximum input offset voltage of the LMP2022 is ±5 µV.
- What is the typical input offset voltage drift of the LMP2022?
The typical input offset voltage drift is –0.004 µV/°C.
- What is the input voltage noise of the LMP2022 at a gain of 1000?
The input voltage noise is 11 nV/√Hz at a gain of 1000.
- What is the open loop gain of the LMP2022?
The open loop gain is 160 dB.
- What are the typical applications of the LMP2022?
The LMP2022 is typically used in precision instrumentation, battery-powered instrumentation, thermocouple amplifiers, and bridge amplifiers.
- What is the supply voltage range of the LMP2022?
The supply voltage range is from 2.2 V to 5.5 V.
- What is the operating temperature range of the LMP2022?
The operating temperature range is from −40°C to 125°C.
- What packages are available for the LMP2022?
The LMP2022 is available in 8-Pin VSSOP and 8-Pin SOIC packages.
- What is the slew rate of the LMP2022?
The slew rate is 2.6 V/µs.
- What is the gain bandwidth product (GBW) of the LMP2022?
The GBW is 5 MHz.
