Overview
The OPA4132UA/2K5 is a high-speed, FET-input operational amplifier from Texas Instruments. It is part of the OPAx132 series, which includes single, dual, and quad versions. This particular model is a quad operational amplifier, offering four independent channels. The OPA4132UA/2K5 is known for its excellent DC performance, high slew rate, and wide bandwidth, making it suitable for a variety of applications where high speed and low noise are critical.
The device is available in a 14-pin SOIC surface-mount package and is specified for operation over a temperature range of –40°C to +85°C. It features low input bias current, high open-loop gain, and excellent dynamic behavior over a wide range of load conditions, including high load capacitance.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Input Offset Voltage | TA = 25°C, VS = ±15V | ±0.2 | ±0.5 | ±2 | mV |
| Input Offset Voltage Drift | TA = –40°C to +85°C | ±2 | ±10 | μV/°C | |
| Power-Supply Rejection Ratio | ±2.5V ≤ VS ≤ ±18V | ±5 | ±30 | μV/V | |
| Channel Separation (dual and quad) | RL = 2kΩ | 0.2 | μV/V | ||
| Input Bias Current | VCM = 0V | ±5 | ±50 | pA | |
| Gain Bandwidth Product | 8 | MHz | |||
| Slew Rate | ±20 | V/μs | |||
| Settling Time | 10V step, G = 1, CL = 100pF | 0.7 | μs (0.1%) | ||
| Total Harmonic Distortion plus Noise | f = 1kHz, G = 1, VO = 3.5Vrms, RL = 2kΩ | 0.0008% | |||
| Operating Temperature Range | –40 | 85 | °C | ||
| Supply Voltage Range | ±2.5 | ±18 | V | ||
| Quiescent Current | IO = 0 | ±4 | ±4.8 | mA (per amplifier) |
Key Features
- High-Speed Performance: 8 MHz gain bandwidth product and 20 V/μs slew rate.
- Low Noise: 8 nV/√Hz voltage noise at 1 kHz.
- Low Distortion: Total harmonic distortion plus noise of 0.00008% at 1 kHz.
- Wide Supply Range: Operates from ±2.5V to ±18V.
- Low Input Bias Current: Maximum input bias current of 50 pA.
- High Open-Loop Gain: 126 dB with a 2 kΩ load.
- Excellent Dynamic Behavior: Stable in unity gain and capable of driving high load capacitance.
- Independent Channels: Quad version features completely independent circuitry for lowest crosstalk and freedom from interaction.
Applications
- SAR ADC Driver: Suitable for driving successive approximation register analog-to-digital converters.
- Voltage Reference Buffer: Can be used to buffer voltage references in precision applications.
- Trans-Impedance Amplifier: Ideal for converting current signals to voltage signals.
- Photodiode Amplifier: Used in optical sensing applications to amplify photodiode currents.
- Active Filter: Can be used in active filter circuits to provide precise filtering.
- Integrator: Suitable for integration tasks in various analog circuits.
- General-Purpose, Audio, Data-Acquisition, and Communications Applications: Especially useful where high source impedance is encountered.
Q & A
- What is the gain bandwidth product of the OPA4132UA/2K5?
The gain bandwidth product is 8 MHz.
- What is the slew rate of the OPA4132UA/2K5?
The slew rate is ±20 V/μs.
- What is the input offset voltage of the OPA4132UA/2K5?
The input offset voltage is typically ±0.5 mV and can be up to ±2 mV.
- What is the operating temperature range of the OPA4132UA/2K5?
The operating temperature range is –40°C to +85°C.
- What is the supply voltage range for the OPA4132UA/2K5?
The supply voltage range is ±2.5V to ±18V.
- How many channels does the OPA4132UA/2K5 have?
The OPA4132UA/2K5 is a quad operational amplifier, meaning it has four independent channels.
- What is the typical quiescent current per amplifier for the OPA4132UA/2K5?
The typical quiescent current per amplifier is ±4 mA.
- What are some common applications of the OPA4132UA/2K5?
Common applications include SAR ADC drivers, voltage reference buffers, trans-impedance amplifiers, photodiode amplifiers, active filters, and integrators.
- What package type is the OPA4132UA/2K5 available in?
The OPA4132UA/2K5 is available in a 14-pin SOIC surface-mount package.
- Does the OPA4132UA/2K5 have low noise characteristics?
Yes, the OPA4132UA/2K5 has low noise characteristics with a voltage noise of 8 nV/√Hz at 1 kHz.
