Overview
The LMP7702MMX/NOPB, produced by Texas Instruments, is part of the LMP770x family of precision, CMOS input, rail-to-rail input and output (RRIO) amplifiers. This dual amplifier is designed for high precision applications, featuring low input bias current and low input referred voltage noise. The LMP7702 is ideal for sensor interface and other instrumentation applications due to its wide supply voltage range and high common-mode rejection ratio (CMRR).
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Offset Voltage | ±37 | ±200 | ±520 | μV |
| Input Bias Current | ±0.2 | ±1 | ±400 | pA |
| Input Referred Voltage Noise | 9 | nV/√Hz | ||
| Common-Mode Rejection Ratio (CMRR) | 86 | 130 | 138 | dB |
| Open-Loop Gain | 130 | dB | ||
| Unity-Gain Bandwidth | 2.5 | MHz | ||
| Supply Voltage Range | 2.7 | 12 | V | |
| Supply Current | 1.5 | mA | ||
| Temperature Range | −40 | 125 | °C |
Key Features
- Low Input Bias Current: ±200 fA, making it suitable for high impedance sensor interfaces.
- Low Input Referred Voltage Noise: 9 nV/√Hz, enhancing signal integrity in noise-sensitive applications.
- Rail-to-Rail Input and Output: Allows the amplifier to operate with input and output signals that swing close to the supply rails.
- Wide Supply Voltage Range: Operates from 2.7 V to 12 V, making it versatile for various power supply conditions.
- High CMRR: Common-mode rejection ratio of up to 130 dB, ensuring minimal interference from common-mode signals.
- Compact Packaging: Available in 8-Pin SOIC and 8-Pin VSSOP packages, suitable for space-constrained designs.
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 configurations for amplifying small signals.
- DAC Buffer: Can serve as a buffer for digital-to-analog converters to improve signal integrity.
- Instrumentation Amplifier: Can be configured as an instrumentation amplifier for differential signal amplification.
- Active Filters: Can be used in active filter circuits to filter signals with high precision.
Q & A
- What is the input offset voltage of the LMP7702?
The input offset voltage of the LMP7702 is typically ±200 μV, with a maximum of ±520 μV.
- What is the input bias current of the LMP7702?
The input bias current is typically ±1 pA, with a maximum of ±400 pA.
- What is the common-mode rejection ratio (CMRR) of the LMP7702?
The CMRR is up to 130 dB.
- What is the supply voltage range of the LMP7702?
The supply voltage range is from 2.7 V to 12 V.
- What are the typical applications of the LMP7702?
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 LMP7702?
The unity-gain bandwidth is 2.5 MHz.
- What is the temperature range of the LMP7702?
The operating temperature range is from −40°C to 125°C.
- What are the available packages for the LMP7702?
The LMP7702 is available in 8-Pin SOIC and 8-Pin VSSOP packages.
- How does the LMP7702 handle rail-to-rail input and output?
The LMP7702 features a rail-to-rail input stage and output stage, allowing the amplifier to operate with signals that swing close to the supply rails.
- What is the input referred voltage noise of the LMP7702?
The input referred voltage noise is 9 nV/√Hz.
