Overview
The AD824AR-16, produced by Analog Devices Inc., is a quad, FET input, single supply operational amplifier featuring rail-to-rail outputs. This amplifier is designed to operate from a single supply voltage ranging from 3 V to 30 V, and it is also compatible with dual supplies up to ±15 V. The AD824 is fabricated on Analog Devices' complementary bipolar process, which ensures a unique input stage that allows the input voltage to safely extend beyond the negative supply and to the positive supply without phase inversion or latch-up. This makes the AD824 highly versatile for various low voltage applications where low input current is crucial.
Key Specifications
| Parameter | Symbol | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage (AD824A) | VOS | TMIN to TMAX | 0.1 | 1.0 | 1.5 | mV |
| Input Bias Current | IB | TMIN to TMAX | 2 | 12 | 4000 | pA |
| Input Offset Current | IOS | TMIN to TMAX | 2 | 10 | 300 | pA |
| Input Voltage Range | -0.2 | +3.0 | V | |||
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 2 V | 66 | 80 | dB | |
| Large Signal Voltage Gain | AVO | VO = 0.2 V to 4.0 V, RL = 2 kΩ | 20 | 40 | V/mV | |
| Full-Power Bandwidth | BWP | 1% distortion, VO = 4 V p-p | 150 kHz | |||
| Gain Bandwidth Product | GBP | 2 MHz | ||||
| Slew Rate | 2 V/µs |
Key Features
- Single supply operation: 3 V to 30 V, and compatible with dual supplies up to ±15 V.
- Very low input bias current: 2 pA, making it suitable for high impedance sources.
- Rail-to-rail output swing, allowing the output voltage to swing to within 15 mV of the supplies.
- Low supply current per amplifier: 500 µA.
- Wide bandwidth: 2 MHz and slew rate: 2 V/µs.
- No phase reversal, ensuring stable operation even when the input voltage exceeds the supply rails.
- Capacitive loads up to 350 pF can be handled without oscillation.
Applications
- Photo diode preamplifiers.
- Battery powered instrumentation.
- Power supply control and protection.
- Medical instrumentation.
- Remote sensors.
- Low voltage strain gage amplifiers.
- DAC output amplifier.
Q & A
- What is the input bias current of the AD824AR-16?
The input bias current of the AD824AR-16 is typically 2 pA and can be up to 12 pA over the temperature range. - What is the supply voltage range for the AD824AR-16?
The AD824AR-16 can operate from a single supply voltage of 3 V to 30 V and is also compatible with dual supplies up to ±15 V. - What is the gain bandwidth product of the AD824AR-16?
The gain bandwidth product of the AD824AR-16 is 2 MHz. - Can the AD824AR-16 handle capacitive loads?
Yes, the AD824AR-16 can handle capacitive loads up to 350 pF without oscillation. - What are some common applications of the AD824AR-16?
The AD824AR-16 is commonly used in photo diode preamplifiers, battery powered instrumentation, power supply control and protection, medical instrumentation, remote sensors, and low voltage strain gage amplifiers. - What is the slew rate of the AD824AR-16?
The slew rate of the AD824AR-16 is 2 V/µs. - Does the AD824AR-16 have rail-to-rail output swing?
Yes, the AD824AR-16 features rail-to-rail output swing, allowing the output voltage to swing to within 15 mV of the supplies. - What is the common-mode rejection ratio (CMRR) of the AD824AR-16?
The CMRR of the AD824AR-16 is typically 80 dB for VCM = 0 V to 2 V. - How much current does each amplifier in the AD824AR-16 consume?
Each amplifier in the AD824AR-16 consumes a supply current of 500 µA. - Is the AD824AR-16 suitable for high impedance sources?
Yes, the AD824AR-16 is suitable for high impedance sources due to its very low input bias current.
