Overview
The AD841KNZ is a high-speed, high-precision operational amplifier produced by Analog Devices Inc. It is part of the company's family of wide bandwidth operational amplifiers, which includes the AD842. The AD841 is known for its exceptional AC performance, precision, and wide bandwidth, making it suitable for various high-frequency applications.
This amplifier is fabricated using Analog Devices’ junction isolated complementary bipolar (CB) process, which combines DC precision and wideband AC performance. It offers a 40 MHz unity-gain bandwidth, a fast settling time of 110 ns to 0.01% for a 10 V step, and a high slew rate of 300 V/µs. These characteristics make the AD841 ideal for applications requiring rapid signal processing and high accuracy.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Unity-Gain Bandwidth | 40 | MHz |
| Settling Time (0.01% for 10 V step) | 110 | ns |
| Slew Rate | 300 | V/µs |
| Full Power Bandwidth (for 20 V p-p into 500 Ω) | 4.7 | MHz |
| Input Offset Voltage | 1 | mV (maximum) |
| Input Voltage Noise | 15 | nV/√Hz (typical) |
| Open-Loop Gain | 45 | V/mV into 1 kΩ load |
| Output Current | 50 | mA (minimum) |
| Supply Current | 12 | mA (maximum) |
Key Features
- High Slew Rate and Fast Settling Time: The AD841 features a 300 V/µs slew rate and settles to within 0.01% of the final value in 110 ns, making it ideal for high-speed applications.
- Precision and Wide Bandwidth Performance: Offers accuracy to 0.01% or better and wide bandwidth performance, previously available only in hybrids.
- Thermally Balanced Layout: The CB process and thermally balanced layout ensure rapid settling without long tails.
- Low Input Offset Voltage: Laser wafer trimming reduces the input offset voltage to 1 mV maximum, eliminating the need for external offset nulling in many applications.
- No External Compensation Required: The AD841 remains stable over its full operating temperature range without needing external compensation.
Applications
- High Speed Signal Conditioning: Suitable for high-frequency signal conditioning circuits and wide bandwidth active filters.
- Video and Pulse Amplifiers: Excellent performance in video and pulse amplifier applications due to its high slew rate and fast settling time.
- Data Acquisition Systems: Preferred choice for data acquisition applications requiring 12-bit accuracy.
- Line Drivers and Active Filters: Used in line drivers and active filters due to its high output current drive capability.
- DAC and ADC Buffer Amplifiers: Ideal for high-speed DAC and ADC buffer amplifiers and other wide bandwidth circuitry.
Q & A
- What is the unity-gain bandwidth of the AD841?
The AD841 has a unity-gain bandwidth of 40 MHz.
- How fast does the AD841 settle to 0.01% for a 10 V step?
The AD841 settles to within 0.01% of the final value in 110 ns for a 10 V step.
- What is the slew rate of the AD841?
The AD841 has a slew rate of 300 V/µs.
- What is the maximum input offset voltage of the AD841?
The maximum input offset voltage of the AD841 is 1 mV.
- What is the typical input voltage noise of the AD841?
The typical input voltage noise of the AD841 is 15 nV/√Hz.
- What are the package options available for the AD841?
The AD841 is available in 14-pin plastic PDIP, 14-pin hermetic CERDIP, and 20-pin LCC packages.
- What are some typical applications of the AD841?
The AD841 is typically used in high-speed signal conditioning, video and pulse amplifiers, data acquisition systems, line drivers, active filters, and as DAC and ADC buffer amplifiers.
- Does the AD841 require external compensation?
No, the AD841 does not require external compensation and remains stable over its full operating temperature range.
- What is the minimum output current drive capability of the AD841?
The minimum output current drive capability of the AD841 is 50 mA.
- What is the maximum supply current of the AD841?
The maximum supply current of the AD841 is 12 mA.
