Overview
The AD844ANZ is a high-speed monolithic operational amplifier produced by Analog Devices Inc. It is fabricated using the junction isolated complementary bipolar (CB) process, which combines high bandwidth and very fast large signal response with excellent DC performance. This current feedback 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 AD844ANZ stands out for its low distortion, low noise, and low drift, making it an excellent choice for various high-frequency applications.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Offset Voltage (VOS) | 50 μV (max) | TA = 25°C, VS = ±15 V |
| Input Bias Current | 9 nA/°C (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 Voltage Swing | ±2.5 V | For 50 Ω loads |
| Supply Voltage Range | ±4.5 V to ±18 V | |
| Temperature Range | -40°C to +85°C (industrial) | |
| Package | 8-Pin PDIP (N) |
Key Features
- High-speed operation with bandwidths up to 60 MHz.
- Low distortion, low noise, and low drift.
- Essentially free from slew rate limitations with rise and fall times independent of output level.
- Capable of driving loads down to 50 Ω and large capacitive loads using an external network.
- Laser-trimmed offset voltage and input bias currents to minimize DC errors.
- Excellent differential gain and differential phase characteristics, making it suitable for video applications.
- Short-circuit protected to 80 mA.
Applications
- Current-to-voltage applications.
- Inverting mode amplifiers.
- Noninverting applications.
- Input amplifiers for flash analog-to-digital converters (ADCs).
- Video applications with bandwidths up to 60 MHz.
- High-frequency circuits requiring low distortion and high linearity.
Q & A
- What is the AD844ANZ?
The AD844ANZ is a high-speed monolithic operational amplifier produced by Analog Devices Inc., optimized for high-frequency applications.
- What are the key advantages of the AD844ANZ over traditional op amps?
The AD844ANZ offers better AC performance, high linearity, and an exceptionally clean pulse response due to its current feedback architecture.
- What is the maximum bandwidth of the AD844ANZ?
The AD844ANZ can achieve bandwidths up to 60 MHz.
- What is the slew rate of the AD844ANZ?
The AD844ANZ has a slew rate of over 2000 V/μs for a full 20 V output step.
- What is the settling time of the AD844ANZ?
The settling time is typically 100 ns to 0.1%, essentially independent of gain.
- What are the temperature ranges for the AD844ANZ?
The AD844ANZ is specified for the industrial temperature range of -40°C to +85°C.
- What package options are available for the AD844ANZ?
The AD844ANZ is available in an 8-Pin PDIP (N) package.
- Can the AD844ANZ drive large capacitive loads?
Yes, the AD844ANZ can drive large capacitive loads using an external network.
- Is the AD844ANZ short-circuit protected?
Yes, the AD844ANZ is short-circuit protected to 80 mA.
- What are some common applications of the AD844ANZ?
Common applications include current-to-voltage applications, input amplifiers for flash ADCs, and video applications with high bandwidth requirements.
