Overview
The AD844SQ/883B is a high-speed monolithic operational amplifier produced by Analog Devices Inc. It is fabricated using the junction isolated complementary bipolar (CB) process, which ensures excellent ac and dc performance. This operational amplifier is particularly notable for its low distortion, low noise, and low drift, combined with a wide bandwidth, making it highly suitable for various high-speed applications.
The AD844SQ/883B is optimized for use in current-to-voltage applications and as an inverting mode amplifier but can also be used in noninverting configurations. Its current feedback architecture provides superior ac performance, high linearity, and a clean pulse response, making it an excellent choice for applications requiring high-speed and precision.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Offset Voltage (VOS) | 50 μV (typical) | TA = 25°C, VS = ±15 V |
| Input Bias Current | 9 nA/°C (typical drift) | TA = 25°C, VS = ±15 V |
| Bandwidth | Up to 60 MHz | Gain = -1, CL = 10 pF, RL = 500 Ω |
| Slew Rate | Over 2000 V/μs | For a full 20 V output step |
| Settling Time | Typically 100 ns to 0.1% | Essentially independent of gain |
| Output Current | Short-circuit protected to 80 mA | |
| Operating Temperature Range | -55°C to +125°C (military grade) | |
| Package Options | 8-lead CERDIP (Q) |
Key Features
- High-speed operation with bandwidths up to 60 MHz.
- Low distortion and low noise, making it suitable for high-fidelity applications.
- Low drift with offset voltage drift of typically 1 μV/°C.
- Current feedback architecture, which provides superior ac performance and high linearity.
- Fast large signal response with a slew rate of over 2000 V/μs.
- Ability to drive 50 Ω loads to ±2.5 V with low distortion.
- Short-circuit protected to 80 mA.
- Operates from ±4.5 V to ±18 V power supplies.
- Excellent differential gain and differential phase characteristics, suitable for video applications.
Applications
- Input amplifiers for flash analog-to-digital converters (ADCs).
- Video applications with bandwidths up to 60 MHz.
- Current-to-voltage converters.
- Inverting and noninverting amplifier configurations.
- High-speed data acquisition systems.
- Medical imaging and diagnostic equipment.
- High-frequency signal processing and filtering.
Q & A
- What is the typical offset voltage of the AD844SQ/883B?
The typical offset voltage is 50 μV at TA = 25°C and VS = ±15 V.
- What is the slew rate of the AD844SQ/883B?
The slew rate is over 2000 V/μs for a full 20 V output step.
- What are the operating temperature ranges for the AD844SQ/883B?
The operating temperature range is -55°C to +125°C for the military grade.
- What package options are available for the AD844SQ/883B?
The AD844SQ/883B is available in an 8-lead CERDIP (Q) package.
- Can the AD844SQ/883B drive low impedance loads?
Yes, it can drive 50 Ω loads to ±2.5 V with low distortion.
- What is the maximum output current of the AD844SQ/883B?
The AD844SQ/883B is short-circuit protected to 80 mA.
- What are the power supply requirements for the AD844SQ/883B?
The AD844SQ/883B can operate from ±4.5 V to ±18 V power supplies.
- Is the AD844SQ/883B suitable for video applications?
Yes, it exhibits excellent differential gain and differential phase characteristics, making it suitable for video applications with bandwidths up to 60 MHz.
- How does the AD844SQ/883B differ from traditional op-amps?
The AD844SQ/883B uses a current feedback architecture, which provides better ac performance, high linearity, and an exceptionally clean pulse response compared to traditional op-amps).
- What is the settling time of the AD844SQ/883B?
The settling time is typically 100 ns to 0.1%, and it is essentially independent of gain).
