Overview
The LMP2021MF/NOPB, produced by Texas Instruments, is a precision operational amplifier that belongs to the LMP™ precision family. This device is available in single (LMP2021) and dual (LMP2022) configurations. The LMP2021MF/NOPB is particularly notable for its ultra-low input offset voltage, near-zero input offset voltage drift, and very low input voltage noise. These attributes make it ideal for high-accuracy applications such as instrumentation and sensor interfaces.
The proprietary continuous auto-zero correction circuitry 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. With its high open-loop gain of 160 dB and very low noise, this amplifier is suitable for applications requiring high precision and low error budgets.
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 |
| GBW | 5 MHz | MHz |
| Slew Rate | 2.6 V/µs | V/µs |
| Operating Temperature Range | −40°C to 125°C | °C |
| Package Options | 5-Pin SOT-23, 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 (11 nV/√Hz at AV = 1000).
- High open-loop gain of 160 dB.
- High CMRR (139 dB) and PSRR (130 dB) due to proprietary continuous auto-zero correction circuitry.
- No 1/f noise component.
- 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 5-Pin SOT-23 and 8-Pin SOIC packages for the LMP2021, and 8-Pin VSSOP and 8-Pin SOIC packages for the LMP2022.
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 input offset voltage of the LMP2021MF/NOPB?
The input offset voltage is ±5 µV.
- What is the input offset voltage drift of the LMP2021MF/NOPB?
The typical input offset voltage drift is –0.004 µV/°C, and the maximum is ±0.02 µV/°C.
- What is the input voltage noise of the LMP2021MF/NOPB at a gain of 1000?
The input voltage noise is 11 nV/√Hz at AV = 1000.
- What is the open-loop gain of the LMP2021MF/NOPB?
The open-loop gain is 160 dB.
- What are the CMRR and PSRR of the LMP2021MF/NOPB?
The CMRR is 139 dB, and the PSRR is 130 dB.
- What is the supply voltage range for the LMP2021MF/NOPB?
The supply voltage range is from 2.2 V to 5.5 V.
- What is the supply current per amplifier for the LMP2021MF/NOPB?
The supply current per amplifier is 1.1 mA.
- What are the package options for the LMP2021MF/NOPB?
The package options include 5-Pin SOT-23 and 8-Pin SOIC for the LMP2021.
- What are some typical applications of the LMP2021MF/NOPB?
Typical applications include precision instrumentation amplifiers, battery-powered instrumentation, thermocouple amplifiers, bridge amplifiers, and medical equipment.
- What is the operating temperature range of the LMP2021MF/NOPB?
The operating temperature range is from −40°C to 125°C.
