Overview
The LMP7704MA/NOPB is a precision, low-voltage CMOS operational amplifier (op-amp) produced by Texas Instruments. This device is part of the LMP770x family, which includes the LMP7701 and LMP7702. The LMP7704 is a quad-channel op-amp, making it highly versatile for various applications requiring multiple amplification stages. It is built using VIP50 technology, combining a CMOS input stage with a wide supply voltage range of 2.7 V to 12 V, and a common-mode voltage range up to 12 V. This technology allows the op-amp to operate in conditions where conventional CMOS parts may not be suitable.
The LMP7704 is known for its low input bias current of ±200 fA, low input referred voltage noise of 9 nV/√Hz, and high common-mode rejection ratio (CMRR) of 130 dB. These characteristics make it ideal for precision applications, including high impedance sensor interfaces, battery-powered instrumentation, and active filters.
Key Specifications
| Parameter | Typical Value | Unit |
|---|---|---|
| Input Offset Voltage (VOS) | ±200 µV | µV |
| Input Bias Current (IB) | ±200 fA | fA |
| Input Referred Voltage Noise (en) | 9 nV/√Hz | nV/√Hz |
| Common-Mode Rejection Ratio (CMRR) | 130 dB | dB |
| Open-Loop Gain | 130 dB | dB |
| Unity-Gain Bandwidth | 2.5 MHz | MHz |
| Supply Current | 2.9 mA | mA |
| Supply Voltage Range | 2.7 V to 12 V | V |
| Temperature Range | −40°C to 125°C | °C |
| Rail-to-Rail Input and Output | Yes |
Key Features
- Low Input Bias Current: ±200 fA, ensuring minimal current draw from the input source.
- Low Input Referred Voltage Noise: 9 nV/√Hz, making it suitable for high-precision applications.
- High CMRR: 130 dB, providing excellent rejection of common-mode signals.
- Wide Supply Voltage Range: 2.7 V to 12 V, allowing operation in a variety of power supply conditions.
- Rail-to-Rail Input and Output: Maximizes the signal dynamic range, especially in low supply voltage applications.
- Quad-Channel Configuration: The LMP7704 offers four independent op-amp channels, making it highly versatile.
Applications
- High Impedance Sensor Interface: Ideal for interfacing with high impedance sensors due to its low input bias current.
- Battery-Powered Instrumentation: Suitable for battery-powered devices due to its low power consumption.
- High Gain Amplifiers: Can be used in high gain amplifier configurations due to its high open-loop gain.
- DAC Buffer: Can be used to buffer digital-to-analog converter outputs.
- Instrumentation Amplifier: Can be configured as an instrumentation amplifier for differential signal amplification.
- Active Filters: Can be used in active filter circuits due to its high bandwidth and low noise characteristics.
Q & A
- What is the input bias current of the LMP7704?
The input bias current of the LMP7704 is ±200 fA.
- What is the input referred voltage noise of the LMP7704?
The input referred voltage noise of the LMP7704 is 9 nV/√Hz.
- What is the common-mode rejection ratio (CMRR) of the LMP7704?
The CMRR of the LMP7704 is 130 dB.
- What is the supply voltage range of the LMP7704?
The supply voltage range of the LMP7704 is 2.7 V to 12 V.
- What is the temperature range of the LMP7704?
The temperature range of the LMP7704 is −40°C to 125°C.
- Does the LMP7704 have rail-to-rail input and output?
Yes, the LMP7704 has rail-to-rail input and output capabilities.
- How many op-amp channels does the LMP7704 have?
The LMP7704 has four independent op-amp channels.
- What are some typical applications of the LMP7704?
Typical applications include high impedance sensor interfaces, battery-powered instrumentation, high gain amplifiers, DAC buffers, instrumentation amplifiers, and active filters.
- What is the unity-gain bandwidth of the LMP7704?
The unity-gain bandwidth of the LMP7704 is 2.5 MHz.
- What is the open-loop gain of the LMP7704?
The open-loop gain of the LMP7704 is 130 dB.
