Overview
The OPA659IDRBR, produced by Texas Instruments, is a wideband, unity-gain stable, JFET-input operational amplifier. This device combines a high-bandwidth voltage-feedback amplifier with a JFET-input stage, offering an ultra-high dynamic range. It is particularly suited for high-impedance buffering in various data acquisition and machine vision applications, such as oscilloscope front-end amplifiers and photodiode transimpedance amplifiers used in wafer inspection.
Key Specifications
| Parameter | Typical Value | Unit |
|---|---|---|
| Bandwidth (G = +1V/V) | 650 | MHz |
| Slew Rate (4V Step) | 2550 | V/μs |
| Total Harmonic Distortion (THD) at 10MHz | –78 | dBc |
| Input Voltage Noise | 8.9 | nV/√Hz |
| Overdrive Recovery Time | 8 | ns |
| Settling Time (1% 4V Step) | 8 | ns |
| Input Offset Voltage | ±1 | mV |
| Common-Mode Rejection Ratio (CMRR) | 70 | dB |
| Power Supply Voltage | ±6.5 | V |
| Operating Temperature Range | –40 to +85 | °C |
| Quiescent Current per Channel | 30.5 | mA |
| Output Current | 70 | mA |
Key Features
- High bandwidth of 650MHz at a gain of +1V/V, making it suitable for high-speed applications.
- High slew rate of 2550V/μs, ensuring fast signal response.
- Excellent total harmonic distortion (THD) of –78dBc at 10MHz, providing high signal fidelity.
- Low input voltage noise of 8.9nV/√Hz, reducing noise in the signal chain.
- Fast overdrive recovery time and settling time of 8ns, allowing for quick recovery from signal overdrive.
- Low input offset voltage of ±1mV, minimizing DC offset errors.
- High common-mode rejection ratio (CMRR) of 70dB, enhancing the amplifier's ability to reject common-mode signals.
- JFET-input stage providing high input impedance, ideal for buffering high-impedance sources.
Applications
- Data acquisition applications, such as oscilloscope front-end amplifiers.
- Machine vision applications, including photodiode transimpedance amplifiers used in wafer inspection.
- Optical Time-Domain Reflectometry (OTDR) and high-speed time-of-flight (TOF) sensing.
- High-speed analog signal processing where high bandwidth and low noise are critical.
Q & A
- What is the bandwidth of the OPA659 at a gain of +1V/V?
The bandwidth of the OPA659 at a gain of +1V/V is 650MHz.
- What is the slew rate of the OPA659?
The slew rate of the OPA659 is 2550V/μs for a 4V step.
- What is the typical input voltage noise of the OPA659?
The typical input voltage noise of the OPA659 is 8.9nV/√Hz.
- What is the overdrive recovery time of the OPA659?
The overdrive recovery time of the OPA659 is 8ns.
- What is the common-mode rejection ratio (CMRR) of the OPA659?
The CMRR of the OPA659 is typically 70dB.
- What is the operating temperature range of the OPA659?
The operating temperature range of the OPA659 is –40°C to +85°C.
- What is the quiescent current per channel of the OPA659?
The quiescent current per channel of the OPA659 is typically 30.5mA.
- What are some common applications of the OPA659?
The OPA659 is commonly used in data acquisition, machine vision, OTDR, and high-speed time-of-flight sensing applications.
- What type of input stage does the OPA659 have?
The OPA659 has a JFET-input stage, providing high input impedance.
- Is the OPA659 RoHS compliant?
Yes, the OPA659 is RoHS compliant.
