Overview
The LMP7721MA/NOPB is a precision operational amplifier produced by Texas Instruments. It is renowned for its ultra-low input bias current, making it an ideal choice for high-precision applications. This amplifier features the latest patent-pending technology in input bias current cancellation, ensuring minimal input bias current over the entire input common-mode voltage range. The LMP7721MA/NOPB is part of the LMP precision amplifier family and is included in Texas Instruments' PowerWise™ products, offering a balance between high performance and low power consumption.
Key Specifications
| Parameter | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | LMP7721MA/NOPB |
| Package | SOIC-8 |
| Operating Temperature Range | -40°C to 125°C |
| Input Bias Current (Max) | ±20 fA at 25°C, ±900 fA at 85°C |
| Offset Voltage (Max) | ±150 µV at 25°C |
| Offset Voltage Drift | 1.5 µV/°C |
| DC Open-Loop Gain | 120 dB |
| CMRR (Typ) | 100 dB |
| Input Voltage Noise (at f = 1 kHz) | 6.5 nV/√Hz |
| GBW (Typ) | 17 MHz |
| Slew Rate (Typ) | 10.5 V/µs |
| Supply Current (Typ) | 1.3 mA |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Output Current (Typ) | 22 mA |
| Architecture | CMOS |
Key Features
- Ultra-Low Input Bias Current: The LMP7721MA/NOPB features an input bias current as low as 3 fA, making it suitable for applications requiring minimal input current.
- Low Voltage Noise: With an input voltage noise of 6.5 nV/√Hz at 1 kHz, this amplifier is ideal for high-sensitivity applications.
- Low Offset Voltage and Drift: The amplifier has a low offset voltage of ±150 µV and a drift of 1.5 µV/°C, ensuring high accuracy over temperature variations.
- High DC Open-Loop Gain and CMRR: It offers a DC open-loop gain of 120 dB and a common-mode rejection ratio (CMRR) of 100 dB, enhancing system performance.
- Wide Gain-Bandwidth Product (GBW): The GBW of 17 MHz combined with a high slew rate of 10.5 V/µs makes it suitable for a variety of high-frequency applications.
- Low Power Consumption: With a supply current of 1.3 mA, it is efficient for battery-operated and portable devices.
- Wide Supply Voltage Range: The amplifier operates over a supply voltage range of 1.8 V to 5.5 V, making it versatile for different power requirements.
Applications
- Electrochemical Cell Amplifiers: The ultra-low input bias current and low noise make it ideal for electrochemical cell applications.
- Sensor Interface Circuits: It is well-suited for sensor interface circuits due to its high accuracy and low drift.
- High-Precision Measurement Systems: The amplifier's low noise and high CMRR make it a good choice for high-precision measurement systems.
- Battery-Operated Devices: Its low power consumption and wide supply voltage range make it suitable for battery-operated and portable devices.
- Medical Devices: The high accuracy and low noise of the LMP7721MA/NOPB make it a candidate for use in medical devices requiring precise signal conditioning.
Q & A
- What is the input bias current of the LMP7721MA/NOPB?
The input bias current is as low as 3 fA, with a specified limit of ±20 fA at 25°C and ±900 fA at 85°C.
- What is the operating temperature range of the LMP7721MA/NOPB?
The operating temperature range is -40°C to 125°C.
- What is the typical gain-bandwidth product (GBW) of the LMP7721MA/NOPB?
The typical GBW is 17 MHz.
- What is the supply voltage range of the LMP7721MA/NOPB?
The supply voltage range is 1.8 V to 5.5 V.
- What is the typical slew rate of the LMP7721MA/NOPB?
The typical slew rate is 10.5 V/µs.
- What is the package type of the LMP7721MA/NOPB?
The package type is SOIC-8.
- What are some typical applications of the LMP7721MA/NOPB?
Typical applications include electrochemical cell amplifiers, sensor interface circuits, high-precision measurement systems, battery-operated devices, and medical devices.
- What is the maximum output current of the LMP7721MA/NOPB?
The maximum output current is 22 mA.
- Is the LMP7721MA/NOPB RoHS compliant?
Yes, the LMP7721MA/NOPB is RoHS compliant.
- What is the typical supply current of the LMP7721MA/NOPB?
The typical supply current is 1.3 mA.
