Overview
The OPA4991IDR is a high-voltage, quad operational amplifier produced by Texas Instruments. It is part of the OPAx991 family, which includes the OPA991, OPA2991, and OPA4991. This device is designed for general-purpose applications requiring high voltage and precision. The OPA4991IDR offers exceptional DC precision and AC performance, making it suitable for a wide range of high-voltage industrial applications.
The amplifier features rail-to-rail input and output, low offset voltage, low noise, and a high common-mode rejection ratio. It operates over a wide supply range from 2.7 V to 40 V and is available in various package options, including the SOIC (D) package with 14 pins.
Key Specifications
| Parameter | Value |
|---|---|
| Number of channels | 4 |
| Total supply voltage (min) | 2.7 V |
| Total supply voltage (max) | 40 V |
| Bandwidth (GBW) | 4.5 MHz (typ) |
| Slew rate | 21 V/µs (typ) |
| Offset voltage at 25°C | ±125 µV (typ), ±0.83 mV (max) |
| Offset drift | ±0.3 µV/°C (typ) |
| Noise at 1 kHz | 10.8 nV/√Hz (typ) |
| Common-mode rejection ratio (CMRR) | 130 dB (typ) |
| Quiescent current per channel | 560 µA (typ) |
| Operating temperature range | -40°C to 125°C |
| Output current | ±75 mA (typ) |
| Capacitive load drive | 1 nF |
Key Features
- Low offset voltage: ±125 µV (typ)
- Low offset voltage drift: ±0.3 µV/°C (typ)
- Low noise: 10.8 nV/√Hz at 1 kHz (typ)
- High common-mode rejection ratio: 130 dB (typ)
- Low bias current: ±10 pA
- Rail-to-rail input and output
- Wide bandwidth: 4.5 MHz GBW (typ)
- High slew rate: 21 V/µs (typ)
- High capacitive load drive: 1 nF
- MUX-friendly/comparator inputs
- Amplifier operates with differential inputs up to supply rail
- Amplifier can be used in open-loop or as comparator
- Low quiescent current: 560 µA per amplifier (typ)
- Wide supply range: ±1.35 V to ±20 V, 2.7 V to 40 V
- Robust EMIRR performance: EMI/RFI filters on input and supply pins
Applications
- Land mobile radio
- Sonar
- Low-power audio preamplifier
- Multiplexed data-acquisition systems
- Test and measurement equipment
- ADC driver amplifiers
- SAR ADC reference buffers
- Programmable logic controllers
- High-side and low-side current sensing
Q & A
- Q: What is the OPA4991IDR?
The OPA4991IDR is a high-voltage, quad operational amplifier produced by Texas Instruments, designed for general-purpose applications requiring high voltage and precision.
- Q: What are the key features of the OPA4991IDR?
The OPA4991IDR features low offset voltage, low noise, high common-mode rejection ratio, rail-to-rail input and output, and a wide bandwidth of 4.5 MHz.
- Q: What is the operating temperature range of the OPA4991IDR?
The operating temperature range of the OPA4991IDR is from -40°C to 125°C.
- Q: What are the typical applications of the OPA4991IDR?
The OPA4991IDR is used in land mobile radio, sonar, low-power audio preamplifiers, multiplexed data-acquisition systems, test and measurement equipment, ADC driver amplifiers, SAR ADC reference buffers, programmable logic controllers, and high-side and low-side current sensing.
- Q: What is the quiescent current per channel of the OPA4991IDR?
The quiescent current per channel of the OPA4991IDR is typically 560 µA.
- Q: Can the OPA4991IDR be used as a comparator?
- Q: What is the slew rate of the OPA4991IDR?
The slew rate of the OPA4991IDR is typically 21 V/µs.
- Q: What is the maximum output current of the OPA4991IDR?
The maximum output current of the OPA4991IDR is typically ±75 mA.
- Q: Is the OPA4991IDR RoHS compliant?
- Q: Where can I find detailed information about the OPA4991IDR?
Detailed information about the OPA4991IDR can be found on the Texas Instruments website, as well as through datasheets available from various electronics suppliers.
