Overview
The LMV844MTX/NOPB is a quad operational amplifier from Texas Instruments, part of the LMV84x family. These devices are designed to operate with supply voltages ranging from 2.7 V to 12 V and feature rail-to-rail input and output capability. The LMV844 is particularly suited for applications requiring multiple amplifiers due to its quad configuration, available in 14-pin TSSOP and 14-pin SOIC packages. This makes it an ideal choice for area-constrained PCBs and portable electronics. The LMV84x series is known for its low offset voltage, low supply current, and CMOS inputs, making them suitable for high impedance sensor interfaces and battery-powered instrumentation.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (V+ – V−) | 2.7 | 12 | V | ||
| Input Offset Voltage (VOS) | TA = 25°C, V+ = 5 V | –500 | ±50 | 500 | µV |
| Input Bias Current (IB) | TA = 25°C, V+ = 5 V | 0.3 | 10 | 300 | pA |
| Common-Mode Rejection Ratio (CMRR) | 0 V ≤ VCM ≤ 5 V | 80 | 112 | dB | |
| Power Supply Rejection Ratio (PSRR) | 2.7 V ≤ V+ ≤ 12 V, VO = V+/2 | 82 | 108 | dB | |
| Unity Gain Bandwidth (GBW) | TA = 25°C, V+ = 5 V | 4.5 | MHz | ||
| Slew Rate (SR) | AV = 1, VO = 9 VPP | 2.5 | V/µs | ||
| Supply Current (IS) Per Channel | TA = 25°C, V+ = 5 V | 1.03 | 1.7 | 2 | mA |
| Temperature Range | –40 | 125 | °C |
Key Features
- Small Package Options: Available in 14-pin TSSOP and 14-pin SOIC packages, ideal for area-constrained PCBs and portable electronics.
- Wide Supply Voltage Range: Operates with supply voltages from 2.7 V to 12 V.
- Rail-to-Rail Input and Output: Allows for input and output voltages to range from the negative to the positive supply rail.
- Low Supply Current: Only 1 mA per channel, making it suitable for battery-powered applications.
- Low Input Offset Voltage: Maximum of 500 µV, ensuring high precision in various applications.
- High Common-Mode Rejection Ratio (CMRR) and Power Supply Rejection Ratio (PSRR): CMRR of 112 dB and PSRR of 108 dB, providing excellent noise rejection.
- High Unity Gain Bandwidth: 4.5 MHz, suitable for high-frequency applications.
- CMOS Inputs: High impedance inputs, ideal for high impedance sensor interfaces.
Applications
- High Impedance Sensor Interface: Ideal for interfacing with high impedance sensors due to its CMOS inputs and low input bias current.
- Battery-Powered Instrumentation: Suitable for battery-powered devices due to its low supply current.
- High Gain and Instrumentation Amplifiers: Can be used in high gain configurations and as part of instrumentation amplifiers.
- DAC Buffers and Active Filters: Useful in buffering digital-to-analog converters and in active filter circuits.
- Medical, Test Equipment, Audio, and Automotive Applications: Its near-precision specifications make it a good fit for various demanding applications.
Q & A
- What is the supply voltage range of the LMV844MTX/NOPB?
The LMV844MTX/NOPB operates with supply voltages ranging from 2.7 V to 12 V.
- What is the typical supply current per channel for the LMV844MTX/NOPB?
The typical supply current per channel is 1.7 mA.
- What is the unity gain bandwidth of the LMV844MTX/NOPB?
The unity gain bandwidth is 4.5 MHz.
- What are the package options available for the LMV844MTX/NOPB?
The LMV844MTX/NOPB is available in 14-pin TSSOP and 14-pin SOIC packages.
- What is the maximum input offset voltage for the LMV844MTX/NOPB?
The maximum input offset voltage is 500 µV.
- What is the common-mode rejection ratio (CMRR) of the LMV844MTX/NOPB?
The CMRR is 112 dB.
- What is the power supply rejection ratio (PSRR) of the LMV844MTX/NOPB?
The PSRR is 108 dB.
- What is the slew rate of the LMV844MTX/NOPB?
The slew rate is 2.5 V/µs.
- What are some typical applications of the LMV844MTX/NOPB?
Typical applications include high impedance sensor interfaces, battery-powered instrumentation, high gain and instrumentation amplifiers, DAC buffers, and active filters.
- What is the temperature range of the LMV844MTX/NOPB?
The operating temperature range is from –40°C to 125°C.
