Overview
The AD743JRZ-16-REEL, produced by Analog Devices Inc., is an ultralow noise, precision, FET input, monolithic operational amplifier. This device is renowned for its exceptional noise performance, combining the low voltage noise typically associated with bipolar input op amps and the very low input current of a FET input device. The AD743 is specifically designed for use in applications requiring high precision and low noise, such as preamplifiers in capacitive sensors like ceramic hydrophones.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Input Voltage Noise | 4.0 nV/√Hz at 10 kHz | f = 10 kHz |
| Input Voltage Noise (0.1 Hz to 10 Hz) | 1.0 µV p-p | 0.1 Hz to 10 Hz |
| Input Bias Current | 250 pA (max) | After 5 minutes at T_A = 25°C |
| Offset Voltage | 0.5 mV (max) | After 5 minutes at T_A = 25°C |
| Common-Mode Voltage Range | +13.3 V, -10.7 V | Over maximum operating range |
| Common-Mode Rejection Ratio | 80 dB to 95 dB (T_MIN to T_MAX) | V_CM = ±10 V |
| Open-Loop Gain | 1000 to 4000 V/mV | R_LOAD ≥ 2 kΩ |
| Output Voltage Swing | +13 V, -12 V (R_LOAD ≥ 600 Ω) | T_MIN to T_MAX |
| Short Circuit Current | 20 mA to 40 mA | |
| Power Supply Range | ±4.8 V to ±18 V | |
| Quiescent Current | 8.1 mA to 10.0 mA | |
| Operating Temperature Range | 0°C to 70°C | |
| Package Types | 16-lead SOIC, 8-lead PDIP |
Key Features
- Ultralow Noise Performance: The AD743 offers a maximum input voltage noise of 4.0 nV/√Hz at 10 kHz and 1.0 µV p-p noise from 0.1 Hz to 10 Hz, making it ideal for high-precision applications.
- Low Input Bias Current: With a maximum input bias current of 250 pA, it is suitable for applications requiring minimal input current.
- Excellent DC Performance: The device features a low offset voltage of 0.5 mV and low input offset voltage drift, ensuring stable operation.
- No Output Phase Reversal: The AD743 does not exhibit output phase reversal when the negative common-mode voltage limit is exceeded.
- High Common-Mode Rejection Ratio: It offers a common-mode rejection ratio of 80 dB to 95 dB, ensuring good immunity to common-mode signals.
Applications
- Sonar Preamplifiers: The AD743 is used in sonar applications due to its high dynamic range and low noise characteristics.
- High Dynamic Range Filters: It is suitable for filters requiring high dynamic range (>140 dB).
- Photodiode and IR Detector Amplifiers: The low noise and high precision make it ideal for amplifying signals from photodiodes and IR detectors.
- Accelerometers: The AD743 is used in accelerometer applications where low noise and high precision are critical.
- Capacitive Sensors: Specifically designed for use as a preamp in capacitive sensors such as ceramic hydrophones.
Q & A
- What is the input voltage noise of the AD743 at 10 kHz?
The input voltage noise of the AD743 at 10 kHz is 4.0 nV/√Hz.
- What is the maximum input bias current of the AD743?
The maximum input bias current of the AD743 is 250 pA.
- What is the offset voltage of the AD743?
The offset voltage of the AD743 is 0.5 mV (max).
- Does the AD743 exhibit output phase reversal when the negative common-mode voltage limit is exceeded?
No, the AD743 does not exhibit output phase reversal when the negative common-mode voltage limit is exceeded.
- What are the common package types for the AD743?
The AD743 is available in 16-lead SOIC and 8-lead PDIP packages.
- What is the operating temperature range of the AD743?
The operating temperature range of the AD743 is 0°C to 70°C.
- What is the quiescent current of the AD743?
The quiescent current of the AD743 is 8.1 mA to 10.0 mA.
- What are some typical applications of the AD743?
The AD743 is typically used in sonar preamplifiers, high dynamic range filters, photodiode and IR detector amplifiers, accelerometers, and capacitive sensors.
- What is the common-mode rejection ratio of the AD743?
The common-mode rejection ratio of the AD743 is 80 dB to 95 dB.
- What is the short circuit current of the AD743?
The short circuit current of the AD743 is 20 mA to 40 mA.
