Overview
The AD8227BRMZ-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 supplies ranging from ±1.5 V to ±18 V (2.2 V to 36 V single supply) and is capable of handling voltages beyond the supply rails without damage. This makes it ideal for multichannel, space-constrained applications, particularly in industrial, medical, and portable data acquisition systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Gain Range | 5 | - | 1000 | V/V |
| Supply Voltage (Single) | 2.2 | - | 36 | V |
| Supply Voltage (Dual) | ±1.5 | - | ±18 | V |
| Bandwidth (G = 5) | 250 | - | - | kHz |
| CMRR (G = 5) | 100 | - | - | dB |
| Input Noise | - | 24 | - | nV/√Hz |
| Typical Supply Current | - | 350 | - | μA |
| Operating Temperature | -40 | - | 125 | °C |
| Package Type | - | - | - | 8-Lead MSOP |
Key Features
- Wide Supply Range: Operates on supplies ranging from ±1.5 V to ±18 V (2.2 V to 36 V single supply).
- Single External Resistor for Gain Setting: Allows for gain settings between 5 and 1000 with just one external resistor.
- Rail-to-Rail Output: Enables the signal to make full use of the supply rails.
- Input Voltage Beyond Supply Rails: Can handle voltages beyond the supply rails without damage.
- High CMRR: Minimum CMRR of 100 dB at a gain of 5.
- Low Input Noise: Typical input noise of 24 nV/√Hz).
- Compact Package: Available in 8-lead MSOP and SOIC packages, suitable for space-constrained applications).
Applications
- Industrial Process Controls: Suitable for various industrial monitoring and control systems).
- Bridge Amplifiers: Ideal for amplifying signals from bridge transducers).
- Medical Instrumentation: Used in medical devices requiring precise signal amplification).
- 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 limited).
Q & A
- What is the gain range of the AD8227?
The AD8227 allows for gain settings between 5 and 1000 using a single external resistor.
- What is the operating supply voltage range for the AD8227?
The AD8227 operates on supplies ranging from ±1.5 V to ±18 V (2.2 V to 36 V single supply).
- What is the typical input noise of the AD8227?
The typical 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 a minimum of 100 dB.
- What are the package options for the AD8227?
The AD8227 is available in 8-lead MSOP and SOIC packages.
- What is the operating temperature range for the AD8227?
The AD8227 is fully specified for operation from −40°C to +125°C.
- Can the AD8227 handle input voltages beyond the supply rails?
Yes, the AD8227 can handle input voltages beyond the supply rails without damage. For example, with a ±5 V supply, it can withstand ±35 V at the input.
- What is the typical supply current of the AD8227?
The typical supply current of the AD8227 is 350 μA.
- How does the AD8227 handle common-mode voltage near the supply rails?
The AD8227 has a very wide input range and can handle common-mode voltages near the supply rails with minimal limitation on the output voltage swing.
- Is the AD8227 suitable for multichannel applications?
Yes, the AD8227 is ideal for multichannel, space-constrained applications due to its compact package and high performance.
