Overview
The AD844AQ is a high-speed monolithic operational amplifier produced by Analog Devices Inc. It is fabricated using the junction isolated complementary bipolar (CB) process, combining high bandwidth and very fast large signal response with excellent DC performance. This operational amplifier is optimized for use in current-to-voltage applications and as an inverting mode amplifier, but it is also suitable for many noninverting applications. The AD844AQ stands out due to its current feedback architecture, which provides better AC performance, high linearity, and an exceptionally clean pulse response compared to traditional op amps.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Bandwidth | Up to 60 MHz | TA = 25°C, VS = ±15 V |
| 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 |
| Offset Voltage | Laser trimmed to 50 μV | |
| Input Bias Current Drift | Typically 9 nA/°C | |
| Power Supply Range | ±4.5 V to ±18 V | |
| Load Drive Capability | Can drive 50 Ω loads to ±2.5 V | |
| Short-Circuit Protection | Up to 80 mA | |
| Temperature Range | -40°C to +85°C (Industrial Grade) | |
| Package Options | 8-lead CERDIP, 8-lead PDIP, 16-lead SOIC |
Key Features
- High-speed operation with bandwidths up to 60 MHz.
- Exceptionally high slew rate of over 2000 V/μs.
- Fast settling time, typically 100 ns to 0.1%, independent of gain.
- Laser-trimmed offset voltage and low drift.
- Capable of driving low impedance loads and large capacitive loads.
- Excellent differential gain and phase characteristics, making it suitable for video applications.
- Low distortion, low noise, and low drift, making it ideal for flash analog-to-digital converters (ADCs).
- Short-circuit protected up to 80 mA.
Applications
- Current-to-voltage converters.
- Inverting and noninverting amplifier configurations.
- Video applications with bandwidths up to 60 MHz.
- Input amplifiers for flash analog-to-digital converters (ADCs).
- High-frequency signal processing.
- Driving large capacitive loads using an external network.
Q & A
- What is the bandwidth of the AD844AQ? The bandwidth of the AD844AQ is up to 60 MHz.
- What is the slew rate of the AD844AQ? The slew rate is over 2000 V/μs for a full 20 V output step.
- What is the settling time of the AD844AQ? The settling time is typically 100 ns to 0.1%, essentially independent of gain.
- What is the offset voltage of the AD844AQ? The offset voltage is laser-trimmed to 50 μV.
- What is the input bias current drift of the AD844AQ? The input bias current drift is typically 9 nA/°C.
- What power supply range can the AD844AQ operate within? The AD844AQ can operate from ±4.5 V to ±18 V power supplies.
- What kind of loads can the AD844AQ drive? The AD844AQ can drive 50 Ω loads to ±2.5 V and large capacitive loads using an external network.
- Is the AD844AQ short-circuit protected? Yes, the AD844AQ is short-circuit protected up to 80 mA.
- What are the temperature ranges for the AD844AQ? The AD844AQ is available in commercial, industrial, and military temperature ranges.
- What package options are available for the AD844AQ? The AD844AQ is available in 8-lead CERDIP, 8-lead PDIP, and 16-lead SOIC packages.
