Overview
The AD820AN, produced by Analog Devices Inc., is a precision, low power FET input operational amplifier. It is designed for single-supply operation, with the capability to function from a single supply of 5 V to 36 V or dual supplies of ±2.5 V to ±18 V. This op-amp features true single-supply capability, allowing it to accommodate input signals below ground in single-supply mode. The AD820AN is known for its excellent load drive, low power consumption, and high precision, making it versatile for a wide range of applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (Single) | 5 | - | 36 | V |
| Supply Voltage (Dual) | ±2.5 | - | ±18 | V |
| Unity Gain Bandwidth | 1.8 | - | - | MHz |
| Slew Rate | 3 | - | - | V/μs |
| Input Offset Voltage | 0.4 | 2 | - | mV |
| Input Bias Current | 2 | 25 | - | pA |
| Common-Mode Voltage Range | -15.2 | - | +14 | V |
| Output Current | 15 | - | - | mA |
| Capacitive Load Drive | - | - | 350 | pF |
| Operating Temperature Range | -40 | - | +85 | °C |
Key Features
- True Single Supply Operation: The AD820AN can operate from a single supply of 5 V to 36 V or dual supplies of ±2.5 V to ±18 V.
- Rail-to-Rail Output Swing: Output voltage swing extends to within 10 mV of each rail, providing maximum output dynamic range.
- Low Power Consumption: Maximum quiescent current of 800 μA.
- Excellent Load Drive: Capacitive load drive up to 350 pF and a minimum output current of 15 mA.
- High Precision: Input offset voltage of 800 μV maximum, offset voltage drift of 2 μV/°C, and low input bias currents below 25 pA.
- Low Noise: Input voltage noise of 13 nV/√Hz at 10 kHz.
Applications
- Battery-Powered Precision Instrumentation: Ideal for battery-powered devices due to its low power consumption.
- Photodiode Preamps: Suitable for photodiode preamplification due to its high impedance input stage.
- Active Filters: Used in active filter circuits requiring precision and low noise.
- 12- to 14-Bit Data Acquisition Systems: Applicable in data acquisition systems that require high precision and low noise.
- Medical Instrumentation: Used in medical devices where precision and reliability are critical.
- Low Power References and Regulators: Suitable for low power reference and regulator circuits.
Q & A
- What is the operating supply voltage range for the AD820AN?
The AD820AN can operate from a single supply of 5 V to 36 V or dual supplies of ±2.5 V to ±18 V. - What is the unity gain bandwidth of the AD820AN?
The unity gain bandwidth is 1.8 MHz. - What is the slew rate of the AD820AN?
The slew rate is 3 V/μs. - What is the maximum input offset voltage of the AD820AN?
The maximum input offset voltage is 800 μV. - What is the typical input bias current of the AD820AN?
The typical input bias current is below 25 pA. - What is the capacitive load drive capability of the AD820AN?
The AD820AN can drive up to 350 pF of direct capacitive load. - What is the minimum output current of the AD820AN?
The minimum output current is 15 mA. - What are the common applications of the AD820AN?
The AD820AN is used in battery-powered precision instrumentation, photodiode preamps, active filters, 12- to 14-bit data acquisition systems, medical instrumentation, and low power references and regulators. - What is the operating temperature range of the AD820AN?
The operating temperature range is -40°C to +85°C. - What are the package options available for the AD820AN?
The AD820AN is available in 8-lead plastic DIP, SOIC, and MSOP packages.
