Overview
The AD820ANZ is a precision, low-power FET input operational amplifier (op-amp) manufactured by Analog Devices Inc. It is designed for single-supply operation, ranging from 5 V to 36 V, or dual-supply operation from ±2.5 V to ±18 V. This op-amp features true single-supply capability with an input voltage range that extends below the negative rail, allowing it to accommodate input signals below ground in single-supply mode. The AD820ANZ is known for its high dc precision, low input bias currents, and low input voltage noise, making it suitable for a wide range of applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Initial Offset Voltage | Vs = 5 V, VCM = 0 V, VOUT = 0.2 V | 0.1 | 0.8 | 0.8 | mV |
| Offset Voltage Drift | 2 | 2 | 2 | μV/°C | |
| Input Bias Current | VCM = 0 V to 4 V | 2 | 25 | 25 | pA |
| Unity Gain Bandwidth | 1.9 | 1.8 | 1.8 | MHz | |
| Slew Rate | 3 | 3 | 3 | V/μs | |
| Common-Mode Voltage Range | TMIN to TMAX | -5.2 | +4 | V | |
| Common-Mode Rejection Ratio (CMRR) | VCM = -5 V to +2 V | 66 | 80 | 80 | dB |
| Output Saturation Voltage | ISINK = 20 μA | 5 | 7 | mV |
Key Features
- Single-supply operation from 5 V to 36 V or dual-supply operation from ±2.5 V to ±18 V.
- True single-supply capability with input voltage range extending below the negative rail.
- Low power consumption with a supply current of 800 μA.
- High dc precision with low offset voltage (0.8 mV max), low offset voltage drift (2 μV/°C), and low input bias currents (below 25 pA).
- Low input voltage noise and high input impedance.
- Unity gain bandwidth of 1.8 MHz and slew rate of 3 V/μs.
- Ability to drive up to 350 pF of direct capacitive load and provide a minimum output current of 15 mA.
- Available in 8-Lead PDIP, 8-Lead SOIC_N, and 8-Lead MSOP packages.
Applications
- Single-supply systems requiring high dc precision and low power consumption.
- Portable and battery-powered devices due to its low supply current.
- Instrumentation and measurement systems where high accuracy and stability are required.
- Audio and video circuits where low noise and high dynamic range are necessary.
- Industrial control systems and medical devices requiring reliable and precise signal processing.
Q & A
- What is the operating voltage range of the AD820ANZ?
The AD820ANZ 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 typical input bias current of the AD820ANZ?
The typical input bias current is below 25 pA.
- What is the unity gain bandwidth of the AD820ANZ?
The unity gain bandwidth is 1.8 MHz.
- What is the slew rate of the AD820ANZ?
The slew rate is 3 V/μs.
- Can the AD820ANZ drive capacitive loads?
Yes, it can drive up to 350 pF of direct capacitive load.
- What is the maximum output current of the AD820ANZ?
The minimum output current is 15 mA.
- What are the available packages for the AD820ANZ?
It is available in 8-Lead PDIP, 8-Lead SOIC_N, and 8-Lead MSOP packages.
- What is the common-mode rejection ratio (CMRR) of the AD820ANZ?
The CMRR is typically 80 dB.
- Is the AD820ANZ suitable for single-supply systems?
Yes, it has true single-supply capability and can accommodate input signals below ground in single-supply mode.
- What is the typical supply current of the AD820ANZ?
The typical supply current is 800 μA.
