Overview
The OPA350EA/250 is a high-speed, single-supply, rail-to-rail operational amplifier from Texas Instruments. It is part of the OPA350 series, which is optimized for low voltage, single-supply operation. This amplifier is known for its rail-to-rail input and output, low noise, and high speed operation, making it ideal for various applications including driving sampling Analog-to-Digital (A/D) converters, cell phone PA control loops, video processing, and general-purpose audio applications.
Key Specifications
| Parameter | Typical Value | Unit |
|---|---|---|
| Operating Temperature Range | -40 to 85 | °C |
| Bandwidth (GBW) | 38 | MHz |
| Slew Rate | 22 | V/µs |
| Noise (Vn at 1kHz) | 5 | nV/√Hz |
| Total Harmonic Distortion + Noise (THD+Noise) | 0.0006% | |
| Input Bias Current (Max) | 10 | pA |
| Quiescent Current per Channel (Typ) | 5.2 | mA |
| Output Current (Typ) | 80 | mA |
| Offset Voltage (Max) | 0.5 | mV |
| Common Mode Rejection Ratio (CMRR) - Typical | 84 | dB |
| Package Type | VSSOP (DGK) | |
| Pins | 8 | |
| Total Supply Voltage Range | 2.7 to 5.5 | V |
Key Features
- Rail-to-Rail Input and Output: The OPA350EA/250 features rail-to-rail input and output, with the output voltage swing reaching within 10 mV of the supply rails.
- High Speed Operation: With a bandwidth of 38 MHz and a slew rate of 22 V/µs, this amplifier is suitable for high-speed applications.
- Low Noise: It has a low noise level of 5 nV/√Hz, making it ideal for noise-sensitive applications.
- Low THD+Noise: The total harmonic distortion plus noise is as low as 0.0006%, ensuring high fidelity in audio and other applications.
- Unity-Gain Stable: The amplifier is stable at unity gain, which is beneficial for many application circuits.
- MicroSize Packages: Available in compact packages such as VSSOP, MSOP, SOIC, and PDIP, making it suitable for space-constrained designs.
- Single, Dual, and Quad Versions: The OPA350 series includes single, dual, and quad versions, offering flexibility in design.
Applications
- Driving Sampling A/D Converters: The high speed and low noise characteristics make it ideal for driving sampling Analog-to-Digital converters.
- Cell Phone PA Control Loops: Suitable for controlling output power in cell phones due to its high speed and low noise.
- Video Processing: Capable of driving 75-Ω loads, making it suitable for video processing and consumer video applications.
- Audio Applications: Excellent AC performance, including low noise and low THD, makes it suitable for audio processing.
- General Purpose and Consumer Applications: A low-cost solution for various general-purpose and consumer applications.
- Active Filters and Test Equipment: Also used in active filters and test equipment due to its high performance characteristics.
Q & A
- What is the operating temperature range of the OPA350EA/250?
The operating temperature range is from -40°C to 85°C, with an extended operating range from -55°C to 150°C.
- What are the key features of the OPA350EA/250?
Key features include rail-to-rail input and output, high speed operation (38 MHz bandwidth, 22 V/µs slew rate), low noise (5 nV/√Hz), low THD+Noise (0.0006%), and unity-gain stability.
- What are the typical applications of the OPA350EA/250?
Typical applications include driving sampling A/D converters, cell phone PA control loops, video processing, audio applications, and general-purpose consumer applications.
- What is the package type and pin count of the OPA350EA/250?
The OPA350EA/250 comes in a VSSOP (DGK) package with 8 pins.
- What is the total supply voltage range for the OPA350EA/250?
The total supply voltage range is from 2.7 V to 5.5 V.
- How much quiescent current does the OPA350EA/250 typically consume per channel?
The quiescent current per channel is typically 5.2 mA.
- What is the common mode rejection ratio (CMRR) of the OPA350EA/250?
The CMRR is typically 84 dB.
- Is the OPA350EA/250 unity-gain stable?
Yes, the OPA350EA/250 is unity-gain stable.
- What are the dimensions of the VSSOP (DGK) package for the OPA350EA/250?
The VSSOP (DGK) package dimensions are 3 mm x 3 mm with a thickness of 0.97 mm.
- Are there dual and quad versions available in the OPA350 series?
Yes, the OPA350 series includes dual (OPA2350) and quad (OPA4350) versions with identical specifications for maximum design flexibility.
