Overview
The OPA846IDBVR, produced by Texas Instruments, is a high-performance, wideband, low-noise voltage-feedback operational amplifier. This device is distinguished by its very high gain bandwidth product (GBP) of 1.75 GHz and exceptionally low input voltage noise. The OPA846 is designed to deliver high signal bandwidths at high gain and very low distortion signals at moderate frequencies and lower gains. It is optimized for applications requiring high dynamic range and low noise, making it ideal for use in wideband transimpedance amplifiers, high-speed data acquisition systems, and other demanding analog circuits.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Gain Bandwidth Product (GBP) | 1.75 | GHz |
| Input Voltage Noise | 0.85 | nV/√Hz |
| Supply Current | 12.6 | mA |
| Power Supply Range | ±2.5V to ±6.5V | V |
| Operating Temperature Range | –40°C to +85°C | °C |
| Input Bias Current | –10 to –21 | µA |
| Input Offset Voltage | ±0.15 to ±0.70 | mV |
| Common-Mode Input Range (CMIR) | ±3.2V | V |
| Output Voltage Swing | ±4.5V (typical at ±5V supply) | V |
Key Features
- High gain bandwidth product of 1.75 GHz, enabling high signal bandwidths at high gain.
- Very low input voltage noise of 0.85 nV/√Hz, ideal for low-noise applications.
- Low supply current of 12.6 mA, contributing to low power consumption.
- Stable for gains ≥ 7, with optimized performance at a gain of +10.
- Exceptional DC accuracy and output drive capabilities.
- High power output stage with low distortion.
- External compensation technique available for very flat frequency response below the minimum stable gain.
Applications
- Wideband transimpedance amplifiers, particularly beneficial for high capacitance detectors.
- High-speed data acquisition systems requiring low noise and high dynamic range.
- Analog-to-Digital (A/D) converter input drivers, especially for 12- to 16-bit converters.
- High-performance audio and video systems where low distortion and high bandwidth are critical.
- Medical and scientific instrumentation where high sensitivity and low noise are essential.
Q & A
- What is the gain bandwidth product (GBP) of the OPA846IDBVR?
The GBP of the OPA846IDBVR is 1.75 GHz.
- What is the typical input voltage noise of the OPA846IDBVR?
The typical input voltage noise is 0.85 nV/√Hz.
- What is the supply current of the OPA846IDBVR?
The supply current is precisely trimmed to 12.6 mA at +25°C.
- What is the operating temperature range of the OPA846IDBVR?
The operating temperature range is –40°C to +85°C.
- Is the OPA846IDBVR stable for all gains?
No, it is stable for gains ≥ 7.
- What is the common-mode input range (CMIR) of the OPA846IDBVR?
The CMIR is ±3.2 V.
- Can the OPA846IDBVR be used as a transimpedance amplifier?
Yes, it is ideal for wideband transimpedance applications due to its high GBP and low input noise.
- What are some typical applications of the OPA846IDBVR?
Typical applications include wideband transimpedance amplifiers, high-speed data acquisition systems, and A/D converter input drivers.
- How does the external compensation technique benefit the OPA846IDBVR?
The external compensation technique allows for a very flat frequency response below the minimum stable gain, further improving the already exceptional distortion performance.
- What is the output voltage swing of the OPA846IDBVR?
The output voltage swing is typically ±4.5 V at a ±5 V supply.
