Overview
The AD8227ARMZ-RL, produced by Analog Devices Inc., is a low-cost, wide supply range instrumentation amplifier. It is designed to work with a variety of signal voltages and requires only one external resistor to set any gain between 5 and 1000. The amplifier features a wide input range and rail-to-rail output, allowing the signal to make full use of the supply rails. It can operate on single or dual supplies, ranging from 2.2 V to 36 V (single supply) or ±1.5 V to ±18 V (dual supply), making it versatile for different application needs. The AD8227 is particularly robust, with inputs that can handle voltages beyond the supply rails, and it is ideal for multichannel, space-constrained applications due to its compact MSOP package and high temperature rating of up to 125°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Gain Range | 5 | - | 1000 | V/V |
| Bandwidth (G = 5) | - | 250 | - | kHz |
| CMRR (G = 5) | 100 | - | - | dB |
| Input Noise | - | 24 | - | nV/√Hz |
| Typical Supply Current | - | 350 | - | μA |
| Specified Temperature Range | -40 | - | 125 | °C |
| Package Type | - | 8-Lead MSOP | - | - |
Key Features
- Wide Supply Range: Operates on single or dual supplies from 2.2 V to 36 V (single supply) or ±1.5 V to ±18 V (dual supply).
- Gain Flexibility: Gain set with one external resistor, with a gain range of 5 to 1000.
- Input Range: Input voltage can go below the negative supply, allowing small signals near ground to be amplified without requiring dual supplies.
- Robust Inputs: Inputs can handle voltages beyond the supply rails, e.g., ±35 V with a ±5 V supply.
- Low Noise and High CMRR: Input noise of 24 nV/√Hz and a CMRR of 100 dB minimum (B Grade) at G = 5.
- Compact Package: Available in 8-lead MSOP and SOIC packages, suitable for multichannel, space-constrained applications.
- High Temperature Rating: Fully specified for operation from -40°C to +125°C.
Applications
- Industrial Process Controls: Suitable for monitoring and controlling industrial processes.
- Bridge Amplifiers: Ideal for bridge measurements, such as in strain gage applications.
- Medical Instrumentation: Used in medical devices for signal amplification and conditioning.
- Portable Data Acquisition: Suitable for portable data acquisition systems due to its low power consumption and compact size.
- Multichannel Systems: Ideal for multichannel applications where space is constrained.
Q & A
- What is the gain range of the AD8227?
The gain range of the AD8227 is from 5 to 1000, set by a single external resistor.
- What are the operating supply voltage ranges for the AD8227?
The AD8227 operates on single supplies from 2.2 V to 36 V or dual supplies from ±1.5 V to ±18 V.
- Can the AD8227 handle input voltages beyond the supply rails?
- What is the typical supply current of the AD8227?
The typical supply current of the AD8227 is 350 μA.
- What is the specified temperature range for the AD8227?
The AD8227 is fully specified for operation from -40°C to +125°C.
- What package types are available for the AD8227?
The AD8227 is available in 8-lead MSOP and SOIC packages.
- What is the input noise of the AD8227?
The input noise of the AD8227 is 24 nV/√Hz.
- What is the CMRR of the AD8227 at a gain of 5?
The CMRR of the AD8227 at a gain of 5 is 100 dB minimum (B Grade).
- How does the AD8227 handle common-mode voltages near the supply rails?
The AD8227 has a wide input range and can handle common-mode voltages near the supply rails without significant output voltage swing limitations.
- Is the AD8227 suitable for multichannel applications?
