Overview
The AD744KNZ is a precision, 500 ns settling BiFET operational amplifier produced by Analog Devices Inc. This high-speed op amp combines excellent DC characteristics with enhanced settling, slew rate, and bandwidth. It is part of the AD711 BiFET family and is known for its fast settling time, high DC precision, and low total harmonic distortion (THD), making it suitable for a variety of demanding applications.
Key Specifications
| Parameter | Value |
|---|---|
| Amplifier Type | J-FET |
| Number of Circuits | 1 |
| Slew Rate | 75 V/μs |
| Settling Time | 500 ns to 0.01% for 10 V step |
| Offset Voltage | 0.5 mV max (AD744B) |
| Drift | 10 μV/°C max (AD744B) |
| Open-Loop Gain | 250 V/mV min (AD744B) |
| Gain Bandwidth Product | 13 MHz (internal compensation), >200 MHz (external decompensation at G = 1000) |
| Capacitive Load Drive Capability | 1000 pF with 10 V/μs slew rate (external compensation) |
| Temperature Range | –40°C to +85°C (industrial), –55°C to +125°C (military) |
| Packages | 8-lead plastic mini-DIP, 8-lead SOIC, 8-lead cerdip, TO-99 metal can |
Key Features
- Fast settling time of 500 ns to 0.01% for a 10 V step
- High slew rate of 75 V/μs
- Low total harmonic distortion (THD) of 0.0003%
- High gain bandwidth product of 13 MHz (internally compensated) and over 200 MHz (externally decompensated at high gains)
- Exceptional capacitive load drive capability of up to 1000 pF with external compensation
- Available in various packages including plastic mini-DIP, SOIC, cerdip, and TO-99 metal can
Applications
- Output buffers for 12-bit, 14-bit, and 16-bit DACs and ADCs
- Cable drivers and wideband preamplifiers
- Active filters in data acquisition systems
- Digital signal processing (DSP) front ends
- Demanding audio applications due to low THD
Q & A
- What is the settling time of the AD744KNZ? The AD744KNZ settles to 0.01% in 500 ns for a 10 V step.
- What is the slew rate of the AD744KNZ? The slew rate is 75 V/μs.
- What is the total harmonic distortion (THD) of the AD744KNZ? The THD is 0.0003%.
- What is the gain bandwidth product of the AD744KNZ? The gain bandwidth product is 13 MHz (internally compensated) and over 200 MHz (externally decompensated at high gains).
- What is the maximum capacitive load drive capability of the AD744KNZ? It can drive up to 1000 pF with a 10 V/μs slew rate using external compensation.
- In what temperature ranges is the AD744KNZ rated? The AD744KNZ is rated over the industrial temperature range of –40°C to +85°C and the military temperature range of –55°C to +125°C.
- In what packages is the AD744KNZ available? It is available in 8-lead plastic mini-DIP, 8-lead SOIC, 8-lead cerdip, and TO-99 metal can packages.
- What are some common applications of the AD744KNZ? Common applications include output buffers for DACs and ADCs, cable drivers, wideband preamplifiers, active filters, and DSP front ends.
- Is the AD744KNZ suitable for audio applications? Yes, it is suitable for demanding audio applications due to its low THD.
- Can the AD744KNZ be used in high-gain configurations? Yes, it can be used in high-gain configurations with external decompensation to achieve a gain bandwidth product of over 200 MHz.
