Overview
The AD823AARMZ-R7 is a dual voltage feedback operational amplifier produced by Analog Devices Inc. This device is characterized by its N-channel JFET input stage and a rail-to-rail bipolar output stage, making it suitable for a wide range of applications. The AD823A is fabricated on Analog Devices' XFCB process, a dielectrically isolated complementary bipolar process that features high-speed 36 V bipolar devices, JFETs, and thin film resistors. This amplifier is designed for single-supply operation from 3 V to 36 V, offering high performance and versatility in various electronic systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Supply Range | 3 | 36 | V | |
| Quiescent Current (TMIN to TMAX) | 5.1 | 5.7 | mA | |
| Input Resistance | 1013 | Ω | ||
| Input Capacitance | 1.8 | pF | ||
| Common-Mode Rejection Ratio (VCM = -15 V to +13 V) | 70 | 90 | dB | |
| Output Voltage Swing (IL = ±100 µA) | -14.9 | +14.96 | V | |
| Linear Output Current (VOUT = -14.5 V to +14.5 V) | 44 | mA | ||
| Short-Circuit Current (Sourcing to 0 V) | 78 | mA | ||
| Short-Circuit Current (Sinking to 0 V) | 124 | mA | ||
| -3 dB Bandwidth (G = +1, VOUT ≤ 0.2 V p-p) | 16.5 | 19 | MHz | |
| Slew Rate (G = -1, VOUT = 10 V step) | 31 | 35 | V/µs | |
| Settling Time to 0.1% (G = -1, VOUT = 10 V step) | 380 | ns |
Key Features
- Single-Supply Operation: The AD823A operates from a single supply ranging from 3 V to 36 V, making it versatile for various applications.
- Rail-to-Rail Output: The amplifier features a rail-to-rail bipolar output stage, maximizing the output range and providing up to 40 mA linear drive current.
- High Input Resistance: With an input resistance of 1013 Ω, the AD823A minimizes loading of high output impedance devices.
- Low Input Current: The N-channel JFET input stage ensures picoamp level input currents, reducing the impact on the input signal.
- High Common-Mode Rejection Ratio (CMRR): The CMRR ranges from 70 dB to 90 dB, ensuring good rejection of common-mode signals.
- Fast Dynamic Performance: The amplifier has a -3 dB bandwidth of up to 19 MHz and a slew rate of up to 35 V/µs.
Applications
- A/D Drivers: The rail-to-rail output makes the AD823A suitable as an A/D driver in single-supply systems, capable of driving both the analog input and the reference input of an ADC.
- Instrumentation Amplifiers: Its high CMRR and low input current make it ideal for instrumentation applications where precision and minimal signal loading are crucial.
- Audio and Video Circuits: The high bandwidth and slew rate of the AD823A make it suitable for audio and video signal processing.
- Industrial Control Systems: The wide operating supply range and robust performance characteristics make it a good choice for industrial control and monitoring systems.
Q & A
- What is the operating supply range of the AD823A?
The AD823A operates from a single supply ranging from 3 V to 36 V.
- What is the input resistance of the AD823A?
The input resistance of the AD823A is 1013 Ω.
- What is the common-mode rejection ratio (CMRR) of the AD823A?
The CMRR of the AD823A ranges from 70 dB to 90 dB.
- What is the maximum output current of the AD823A?
The AD823A can provide up to 44 mA of linear output current.
- What is the -3 dB bandwidth of the AD823A?
The -3 dB bandwidth of the AD823A is up to 19 MHz for a gain of +1.
- What is the slew rate of the AD823A?
The slew rate of the AD823A is up to 35 V/µs.
- Can the AD823A be used as an A/D driver?
Yes, the AD823A is suitable as an A/D driver in single-supply systems, capable of driving both the analog input and the reference input of an ADC.
- What is the typical quiescent current of the AD823A?
The typical quiescent current of the AD823A is between 5.1 mA and 5.7 mA.
- What is the power supply rejection ratio (PSRR) of the AD823A?
The PSRR of the AD823A ranges from 70 dB to 94 dB.
- What is the settling time of the AD823A to 0.1%?
The settling time of the AD823A to 0.1% is 380 ns for a 10 V step.
