Overview
The AD824AR-14, 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 of 3 V to 30 V or dual supplies up to ±15 V. The combination of FET inputs and rail-to-rail outputs makes the AD824 particularly useful in low voltage applications where low input current is a critical consideration. Fabricated on Analog Devices' complementary bipolar process, the AD824 has a unique input stage that allows the input voltage to safely extend beyond the negative supply and to the positive supply without any phase inversion or latch-up.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Offset Voltage (AD824A) | VOS | 0.1 | 1.0 | 1.5 | mV |
| Input Bias Current | IB | 2 | 12 | 4000 | pA |
| Input Offset Current | IOS | 2 | 10 | 300 | pA |
| Input Voltage Range | -0.2 | +3.0 | V | ||
| Common-Mode Rejection Ratio | CMRR | 60 | 74 | dB | |
| Input Impedance | 1013||3.3 Ω||pF | ||||
| Large Signal Voltage Gain | AVO | 20 | 40 | 1000 | V/mV |
| Supply Current per Amplifier | 500 | µA | |||
| Bandwidth | 2 | MHz | |||
| Slew Rate | 2 | V/µs |
Key Features
- Single supply operation: 3 V to 30 V or dual supplies up to ±15 V.
- Very low input bias current: 2 pA, minimizing offset errors caused by high unbalanced source impedances.
- Wide input voltage range and rail-to-rail output swing.
- Low supply current per amplifier: 500 µA.
- Wide bandwidth: 2 MHz and slew rate: 2 V/µs.
- No phase reversal and ability to handle capacitive loads up to 350 pF without oscillation.
- Precision combined with low noise, ideal for battery-powered medical equipment.
Applications
- Photo diode preamplifiers.
- Battery powered instrumentation.
- Power supply control and protection.
- Medical instrumentation, including portable medical equipment.
- Remote sensors.
- Low voltage strain gage amplifiers.
- DAC output amplifier.
Q & A
- What is the operating voltage range of the AD824? The AD824 operates from a single supply of 3 V to 30 V or dual supplies up to ±15 V.
- What is the input bias current of the AD824? The input bias current is very low, typically 2 pA.
- What is the bandwidth of the AD824? The bandwidth is 2 MHz.
- Can the AD824 handle capacitive loads? Yes, it can handle capacitive loads up to 350 pF without oscillation.
- What are the typical applications of the AD824? Applications include photo diode preamplifiers, battery powered instrumentation, medical instrumentation, and more.
- What is the slew rate of the AD824? The slew rate is 2 V/µs.
- Does the AD824 have phase reversal issues? No, the AD824 does not have phase reversal issues.
- What is the supply current per amplifier for the AD824? The supply current per amplifier is 500 µA.
- Is the AD824 suitable for low noise applications? Yes, the AD824 is designed for low noise applications, making it ideal for battery-powered medical equipment.
- What is the common-mode rejection ratio (CMRR) of the AD824? The CMRR is typically 74 dB.
