Overview
The AD8220ARMZ, produced by Analog Devices Inc., is a single-supply, JFET input instrumentation amplifier designed for high-performance, portable instrumentation applications. It is the first such amplifier available in an MSOP package, which significantly reduces the board area required compared to traditional SOIC packages. This amplifier is optimized for applications where low power consumption and high common-mode rejection ratio (CMRR) are crucial. It operates on a single supply from 4.5 V to 36 V or a dual supply from ±2.25 V to ±18 V, making it versatile for various system designs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Common-Mode Rejection Ratio (CMRR) at DC | 86 | - | - | dB |
| CMRR at 5 kHz (G = 1) | 80 | - | - | dB |
| Input Bias Current | 10 | - | 25 | pA |
| Input Offset Current | 0.6 | - | 2 | pA |
| Bandwidth (G = 1) | 1.5 | - | - | MHz |
| Slew Rate | 2 | - | - | V/μs |
| Quiescent Supply Current | - | - | 750 | μA |
| Operating Temperature Range | -40 | - | 85 | °C |
| Supply Voltage Range | 4.5 | - | 36 | V |
Key Features
- High CMRR: Minimum CMRR of 86 dB at DC and 80 dB at 5 kHz for G = 1.
- Low Power Consumption: Maximum quiescent supply current of 750 μA.
- Single-Supply Operation: Operates from a single supply of 4.5 V to 36 V or a dual supply of ±2.25 V to ±18 V.
- Rail-to-Rail Output: Maximizes dynamic range on low voltage supplies.
- Gain Setting: Gain settable from 1 to 1000 with a single resistor.
- Reference Pin: Allows the user to offset the output voltage, useful for interfacing with analog-to-digital converters.
- Low Input Currents: Maximum input bias current of 10 pA and input offset current of 0.6 pA.
- Compact Package: Available in an 8-Lead MSOP package, reducing board area.
- ESD Protection: 4 kV ESD protection.
Applications
- Medical Instrumentation: Suitable for high-precision medical devices.
- Precision Data Acquisition: Ideal for systems requiring high accuracy and low noise.
- Transducer Interfaces: Used in various transducer applications due to its high CMRR and low noise characteristics.
- Automotive and Aerospace: Qualified for automotive and aerospace applications with specific grades (W and EP grades respectively).
Q & A
- What is the typical input bias current of the AD8220?
The typical input bias current of the AD8220 is 10 pA, which remains below 300 pA over the entire industrial temperature range.
- What is the common-mode rejection ratio (CMRR) of the AD8220 at DC?
The minimum CMRR of the AD8220 at DC is 86 dB.
- What is the bandwidth of the AD8220 at a gain of 1?
The bandwidth of the AD8220 at a gain of 1 is 1.5 MHz.
- Can the AD8220 operate on a single supply voltage?
Yes, the AD8220 can operate on a single supply voltage from 4.5 V to 36 V or a dual supply from ±2.25 V to ±18 V.
- How is the gain of the AD8220 set?
The gain of the AD8220 is set using a single resistor connected across the RG pins.
- What is the slew rate of the AD8220?
The slew rate of the AD8220 is 2 V/μs.
- What is the maximum quiescent supply current of the AD8220?
The maximum quiescent supply current of the AD8220 is 750 μA.
- Is the AD8220 suitable for automotive applications?
Yes, the AD8220 is qualified for automotive applications, specifically the W grade.
- What package type is the AD8220 available in?
The AD8220 is available in an 8-Lead MSOP package.
- Does the AD8220 have ESD protection?
Yes, the AD8220 has 4 kV ESD protection.
