Overview
The AD744AH is a high-performance, fast-settling, precision FET input monolithic operational amplifier produced by Analog Devices Inc. It combines advanced processing technology, laser wafer drift trimming, and well-matched ion-implanted JFETs to offer outstanding DC precision and dynamic response. The AD744AH is part of the AD744 family, which is known for its excellent DC characteristics and enhanced settling, slew rate, and bandwidth, making it suitable for a variety of precision measurement and high-speed applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Settling Time to 0.01% | 500 ns | |
| Settling Time to 0.0025% | 1.5 μs | |
| Slew Rate | 75 V/μs | |
| Total Harmonic Distortion (THD) | 0.0003% | |
| Gain Bandwidth Product (Internal Compensation) | 13 MHz | |
| Gain Bandwidth Product (External Decompensation, G = 1000) | >200 MHz | |
| Capacitive Load Drive Capability | >1000 pF with 10 V/μs Slew Rate | |
| Input Offset Voltage (AD744B) | 0.5 mV max | |
| Input Offset Voltage Drift (AD744B) | 10 μV/°C max | |
| Open-Loop Gain (AD744B) | 250 V/mV min | |
| Operating Temperature Range | –40°C to +85°C (Industrial) | |
| Package Types | Plastic Mini-DIP, Plastic SOIC, Hermetic Cerdip, Hermetic Metal Can |
Key Features
- Fast settling time: 500 ns to 0.01% and 1.5 μs to 0.0025% for a 10 V step.
- High slew rate: 75 V/μs.
- Low total harmonic distortion (THD): 0.0003%.
- High gain bandwidth product: 13 MHz (internal compensation) and over 200 MHz (external decompensation at high gains).
- Exceptional capacitive load drive capability: >1000 pF with 10 V/μs slew rate.
- Outstanding DC precision: 0.5 mV max input offset voltage, 10 μV/°C max input offset voltage drift, and 250 V/mV min open-loop gain.
- Available in various package types including plastic mini-DIP, plastic SOIC, hermetic cerdip, and hermetic 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.
- Demanding audio applications due to low THD.
- AC preamps in digital signal processing (DSP) front ends.
Q & A
- What is the settling time of the AD744AH to 0.01% for a 10 V step?
The settling time is 500 ns to 0.01% for a 10 V step.
- What is the slew rate of the AD744AH?
The slew rate is 75 V/μs.
- What is the total harmonic distortion (THD) of the AD744AH?
The THD is 0.0003%.
- What is the gain bandwidth product of the AD744AH with internal compensation?
The gain bandwidth product is 13 MHz with internal compensation.
- Can the AD744AH drive high capacitive loads?
Yes, it can drive >1000 pF capacitive loads with a 10 V/μs slew rate using external compensation.
- What are the typical applications of the AD744AH?
Typical applications include output buffers for DACs and ADCs, cable drivers, wideband preamplifiers, active filters, and demanding audio applications.
- What are the available package types for the AD744AH?
The AD744AH is available in plastic mini-DIP, plastic SOIC, hermetic cerdip, and hermetic metal can packages.
- What is the operating temperature range for the AD744AH?
The operating temperature range is –40°C to +85°C for the industrial grade.
- How does the AD744AH perform in terms of DC precision?
The AD744AH offers outstanding DC precision with 0.5 mV max input offset voltage, 10 μV/°C max input offset voltage drift, and 250 V/mV min open-loop gain.
- Can the AD744AH be used in high-gain applications?
Yes, with external decompensation, the AD744AH can achieve a gain bandwidth product of over 200 MHz at high gains.
