Overview
The AD744KR is a high-performance, precision operational amplifier manufactured by Analog Devices Inc. It belongs to the AD744 series, known for its fast settling time, high slew rate, and excellent DC characteristics. This BiFET op-amp combines the advanced processing technology of Analog Devices with laser wafer drift trimming and well-matched ion-implanted JFETs, ensuring outstanding DC precision and dynamic response.
The AD744KR is particularly suited for applications requiring high-speed and high-precision amplification, such as output buffers for DACs and ADCs, cable drivers, wideband preamplifiers, and active filters in data acquisition systems.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package | 8-SOIC (0.154", 3.90mm Width) | |
| Amplifier Type | J-FET | |
| Number of Circuits | 1 | |
| Slew Rate | 75 V/µs | |
| -3dB Bandwidth | 13 MHz | |
| Input Bias Current | 30 pA | |
| Input Offset Voltage | 250 µV | |
| Supply Current | 3.5 mA | |
| Output Current per Channel | 25 mA | |
| Supply Voltage (Single/Dual) | ±4.5 V ~ 18 V | |
| Operating Temperature | 0°C ~ 70°C | |
| Settling Time | 500 ns to 0.01% for 10 V Step | |
| Total Harmonic Distortion (THD) | 0.0003% |
Key Features
- Fast settling time: 500 ns to 0.01% for a 10 V step 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.
- Exceptional capacitive load drive capability: can drive up to 1000 pF capacitive loads with external compensation.
- High DC precision: low input offset voltage (0.5 mV max for AD744B) and low drift (10 µV/°C max for AD744B).
- Available in various packages: 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.
- Wideband preamplifiers.
- Active filters in data acquisition systems.
- AC preamps in digital signal processing (DSP) front ends.
Q & A
- What is the settling time of the AD744KR?
The AD744KR settles to 0.01% in 500 ns for a 10 V step and to 0.0025% in 1.5 µs for a 10 V step.
- What is the slew rate of the AD744KR?
The slew rate of the AD744KR is 75 V/µs.
- What is the total harmonic distortion (THD) of the AD744KR?
The THD of the AD744KR is 0.0003%.
- What is the gain bandwidth product of the AD744KR?
The gain bandwidth product of the AD744KR is 13 MHz.
- Can the AD744KR drive capacitive loads?
Yes, the AD744KR can drive up to 1000 pF capacitive loads with external compensation.
- What are the typical input offset voltage and drift for the AD744KR?
The typical input offset voltage is 0.5 mV max for the AD744B, and the drift is 10 µV/°C max for the AD744B.
- In what packages is the AD744KR available?
The AD744KR 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 AD744KR?
Common applications include output buffers for DACs and ADCs, cable drivers, wideband preamplifiers, active filters, and AC preamps in DSP front ends.
- What is the operating temperature range of the AD744KR?
The operating temperature range of the AD744KR is 0°C to 70°C.
- What is the supply voltage range for the AD744KR?
The supply voltage range for the AD744KR is ±4.5 V to 18 V.
