Overview
The Texas Instruments OPA4991IPWR is a quad, high-performance, low-power operational amplifier designed for a wide range of high-voltage applications. This device features rail-to-rail input and output, low offset voltage, and low noise, making it suitable for various industrial and commercial uses. The OPA4991IPWR operates over a supply voltage range of 2.7V to 40V and is available in a 14-pin TSSOP (PW) package.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|
| Number of Channels | 4 | - | - | - |
| Gain-Bandwidth Product (GBW) | 4.5 MHz | - | - | MHz |
| Slew Rate | 21 V/μs | - | - | V/μs |
| Input Offset Voltage (VOS) | ±125 μV | - | ±895 μV | μV |
| Input Offset Voltage Drift | ±0.3 μV/°C | - | - | μV/°C |
| Input Bias Current | 10 pA | - | - | pA |
| Common Mode Rejection Ratio (CMRR) | 130 dB | 109 dB | - | dB |
| Operating Temperature Range | -40°C to 125°C | - | - | °C |
| Total Supply Voltage | 2.7V to 40V | 2.7V | 40V | V |
| Output Current | ±75 mA | - | - | mA |
| Noise Voltage at 1 kHz | 10.8 nV/√Hz | - | - | nV/√Hz |
Key Features
- Rail-to-Rail Input/Output: The OPA4991IPWR features rail-to-rail input and output, allowing it to operate effectively across the entire supply voltage range.
- Low Offset Voltage and Drift: With a typical input offset voltage of ±125 μV and a drift of ±0.3 μV/°C, this op amp offers high DC precision.
- Low Noise: The device has a low noise voltage of 10.8 nV/√Hz at 1 kHz, making it suitable for noise-sensitive applications.
- High Slew Rate and Capacitive Load Drive: A slew rate of 21 V/μs and the ability to drive high capacitive loads (up to 1 nF) enhance its performance in dynamic applications.
- EMI Hardened and MUX Friendly: The OPA4991IPWR is designed to be EMI hardened and compatible with multiplexed data-acquisition systems.
- Small Size and Low Power Consumption: Available in a compact TSSOP package, it also features low quiescent current per channel (typical 0.56 mA).
- Shutdown Feature: The device includes a shutdown feature to reduce power consumption when not in use.
Applications
- Land Mobile Radio and Sonar: Suitable for high-voltage signal processing in communication and sonar systems.
- Low-Power Audio Preamplifiers: Ideal for audio applications requiring low noise and high fidelity.
- Multiplexed Data-Acquisition Systems: Used in systems that require multiple channels of analog signal processing.
- Test and Measurement Equipment: Employed in various test and measurement instruments due to its high accuracy and stability.
- ADC Driver Amplifiers and SAR ADC Reference Buffers: Serves as a driver for analog-to-digital converters and as a reference buffer for successive approximation register ADCs.
- Programmable Logic Controllers (PLCs): Used in industrial control systems for high-precision analog signal processing.
- High-Side and Low-Side Current Sensing: Suitable for current sensing applications in power management and monitoring systems.
Q & A
- What is the gain-bandwidth product of the OPA4991IPWR?
The gain-bandwidth product (GBW) of the OPA4991IPWR is 4.5 MHz.
- What is the typical slew rate of the OPA4991IPWR?
The typical slew rate of the OPA4991IPWR is 21 V/μs.
- What is the input offset voltage of the OPA4991IPWR?
The typical input offset voltage of the OPA4991IPWR is ±125 μV.
- What is the operating temperature range of the OPA4991IPWR?
The operating temperature range of the OPA4991IPWR is -40°C to 125°C.
- What is the total supply voltage range for the OPA4991IPWR?
The total supply voltage range for the OPA4991IPWR is 2.7V to 40V.
- How many channels does the OPA4991IPWR have?
The OPA4991IPWR is a quad operational amplifier, meaning it has four channels.
- What is the typical output current of the OPA4991IPWR?
The typical output current of the OPA4991IPWR is ±75 mA.
- Is the OPA4991IPWR EMI hardened?
Yes, the OPA4991IPWR is designed to be EMI hardened.
- What package types are available for the OPA4991?
The OPA4991 is available in SOIC, TSSOP, and QFN packages.
- Does the OPA4991IPWR have a shutdown feature?
Yes, the OPA4991IPWR includes a shutdown feature to reduce power consumption when not in use.
