Overview
The OPA355NA/250G4, produced by Texas Instruments, is part of the OPAx355 series of high-speed, voltage-feedback CMOS operational amplifiers. These amplifiers are designed for applications requiring wide bandwidth, such as video processing, ultrasound, and optical networking. The OPA355 series is unity-gain stable and can drive large output currents, making it versatile for various high-speed applications. The amplifiers feature a digital shutdown function, which allows for power saving during idle periods and places the output in a high-impedance state to support output multiplexing.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Unity-Gain Bandwidth | - | 450 | - | MHz |
| Gain-Bandwidth Product (GBW) | - | 200 | - | MHz |
| Input Noise Voltage | - | 5.8 | - | nV/√Hz |
| Differential Gain Error (NTSC) | - | 0.02% | - | % |
| Differential Phase Error (NTSC) | - | 0.05° | - | ° |
| Input Bias Current | - | 3 | - | pA |
| Shutdown Current (per amplifier) | - | 3.4 | - | µA |
| Enable Time | - | 100 | - | ns |
| Disable Time | - | 30 | - | ns |
| Supply Voltage Range | 2.5 | - | 5.5 | V |
| Quiescent Current (per amplifier) | - | 8.3 | - | mA |
| Operating Temperature Range | -40 | - | 125 | °C |
Key Features
- High-speed operation with a unity-gain bandwidth of 450 MHz and a gain-bandwidth product of 200 MHz.
- Low noise of 5.8 nV/√Hz, making it suitable for high-sensitivity applications.
- Excellent video performance with differential gain error of 0.02% and differential phase error of 0.05°.
- Rail-to-rail output swing within 100 mV of the rails, supporting wide dynamic range.
- Low input bias current of 3 pA and low shutdown current of 3.4 µA.
- Fast enable and disable times of 100 ns and 30 ns, respectively.
- Single-supply operating range from 2.5 V to 5.5 V.
- Available in various packages including SOT-23-6, SO-8, VSSOP-10, and TSSOP-14.
- Thermal shutdown protection with a junction temperature of 160°C.
Applications
- Video processing and wideband video multiplexing.
- Ultrasound and medical imaging.
- Optical networking and tunable lasers.
- Photodiode transimpedance amplifiers.
- Active filters and high-speed integrators.
- Analog-to-Digital Converter (ADC) input buffers and Digital-to-Analog Converter (DAC) output amplifiers.
- Barcode scanners and communications equipment.
Q & A
- What is the unity-gain bandwidth of the OPA355?
The unity-gain bandwidth of the OPA355 is 450 MHz.
- What is the typical input noise voltage of the OPA355?
The typical input noise voltage of the OPA355 is 5.8 nV/√Hz.
- What are the differential gain and phase errors for NTSC signals?
The differential gain error is 0.02%, and the differential phase error is 0.05° for NTSC signals.
- What is the quiescent current per amplifier for the OPA355?
The quiescent current per amplifier for the OPA355 is typically 8.3 mA.
- What is the shutdown current per amplifier when disabled?
The shutdown current per amplifier when disabled is typically 3.4 µA.
- What are the enable and disable times for the OPA355?
The enable time is 100 ns, and the disable time is 30 ns.
- What is the operating temperature range for the OPA355?
The operating temperature range for the OPA355 is from –40°C to +125°C.
- In what packages is the OPA355 available?
The OPA355 is available in SOT-23-6, SO-8, VSSOP-10, and TSSOP-14 packages.
- What is the thermal shutdown protection temperature for the OPA355?
The thermal shutdown protection temperature for the OPA355 is 160°C.
- What are some common applications for the OPA355?
Common applications include video processing, ultrasound, optical networking, photodiode transimpedance amplifiers, active filters, and ADC/DAC buffers.
