Overview
The AD744BQ/+ is a high-performance, fast-settling, precision FET input monolithic operational amplifier produced by Analog Devices Inc. This amplifier combines advanced processing technology, laser wafer drift trimming, and well-matched ion-implanted JFETs to offer outstanding DC precision and dynamic response. It is particularly noted for its fast settling time, high slew rate, and low total harmonic distortion, making it suitable for a variety of demanding 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 | |
| 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 | |
| Package Types | 8-Lead Plastic Mini-DIP, 8-Lead SOIC, 8-Lead Cerdip, TO-99 Metal Can | |
| Temperature Range | –40°C to +85°C (Industrial), –55°C to +125°C (Military) |
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: 0.0003%.
- High gain bandwidth product: 13 MHz (internally compensated) and over 200 MHz (externally decompensated at high gains).
- Exceptional DC precision: 0.5 mV max input offset voltage and 10 μV/°C max drift.
- High open-loop gain: 250 V/mV min.
- Capable of driving large capacitive loads: up to 1000 pF with external compensation.
- Available in various package types including 8-Lead Plastic Mini-DIP, 8-Lead SOIC, 8-Lead Cerdip, and TO-99 Metal Can.
Applications
- Output buffers for 12-bit, 14-bit, and 16-bit DACs and ADCs.
- Cable drivers and preamplifiers.
- Active filters in data acquisition systems.
- Audio applications requiring low distortion.
- Digital signal processing (DSP) front ends.
Q & A
- What is the settling time of the AD744BQ/+ to 0.01%?
The settling time to 0.01% is 500 ns for a 10 V step.
- What is the slew rate of the AD744BQ/+?
The slew rate is 75 V/μs.
- What is the total harmonic distortion (THD) of the AD744BQ/+?
The THD is 0.0003%.
- What is the gain bandwidth product of the AD744BQ/+ with internal compensation?
The gain bandwidth product is 13 MHz.
- Can the AD744BQ/+ drive large capacitive loads?
Yes, it can drive up to 1000 pF capacitive loads with external compensation.
- What are the typical applications of the AD744BQ/+?
Typical applications include output buffers for DACs and ADCs, cable drivers, active filters, audio applications, and DSP front ends.
- What are the available package types for the AD744BQ/+?
The available package types include 8-Lead Plastic Mini-DIP, 8-Lead SOIC, 8-Lead Cerdip, and TO-99 Metal Can.
- What is the temperature range for the industrial grade AD744BQ/+?
The temperature range for the industrial grade is –40°C to +85°C.
- What is the input offset voltage of the AD744BQ/+?
The input offset voltage is 0.5 mV max for the AD744B.
- How does the AD744BQ/+ achieve exceptional capacitive load drive capability?
It achieves this through external compensation, allowing it to drive up to 1000 pF capacitive loads with full stability.
