Overview
The AD8227ARMZ from Analog Devices Inc. is a low-cost, wide supply range instrumentation amplifier designed for a variety of signal voltage applications. It operates with a single external resistor to set any gain between 5 and 1000, making it versatile for different amplification needs. The amplifier features a wide input range and rail-to-rail output, allowing it to make full use of the supply rails and amplify small signals near ground without requiring dual supplies. It is suitable for multichannel, space-constrained applications due to its compact 8-TSSOP and 8-MSOP packages.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | 8-TSSOP, 8-MSOP (0.118, 3.00mm Width) | |
| Number of Pins | 8 | |
| Supply Voltage Range | ±1.5 V to ±18 V (2.2 V to 36 V single supply) | V |
| Input Bias Current | 20 nA | nA |
| Common Mode Rejection Ratio (CMRR) | 100 dB | dB |
| Input Offset Voltage (Vos) | 200 μV | μV |
| Slew Rate | 0.8 V/μs | V/μs |
| Operating Supply Current | 400 μA | μA |
| Temperature Range | −40°C to +125°C | °C |
Key Features
- Wide Supply Range: Operates from ±1.5 V to ±18 V (2.2 V to 36 V single supply), allowing flexibility in power supply configurations.
- Gain Programmability: Gain can be set between 5 and 1000 using a single external resistor.
- Rail-to-Rail Output: Output voltage swing extends to within the supply rails, maximizing dynamic range.
- High CMRR: Maintains a high common-mode rejection ratio of 100 dB, ensuring excellent noise rejection.
- Robust Inputs: Inputs can withstand voltages beyond the supply rails, making it suitable for real-world sensor applications.
- Compact Packages: Available in 8-TSSOP and 8-MSOP packages, ideal for space-constrained applications.
Applications
- Precision Data Acquisition Systems: Suitable for high-accuracy data acquisition due to its high CMRR and low noise characteristics.
- Medical Instrumentation: Used in medical devices requiring precise signal amplification and noise rejection.
- Industrial Process Controls: Ideal for industrial applications where robust and reliable signal amplification is necessary.
- Strain Gages and Transducer Interfaces: Often used in strain gage and transducer applications due to its ability to handle small signals and provide high gain accuracy.
- Aerospace Instrumentation: Suitable for aerospace applications requiring high performance and reliability in signal amplification.
Q & A
- What is the supply voltage range of the AD8227ARMZ?
The AD8227ARMZ operates from ±1.5 V to ±18 V (2.2 V to 36 V single supply).
- How is the gain set on the AD8227ARMZ?
The gain can be set between 5 and 1000 using a single external resistor across the RG terminals.
- What is the common-mode rejection ratio (CMRR) of the AD8227ARMZ?
The CMRR of the AD8227ARMZ is 100 dB.
- What are the typical applications of the AD8227ARMZ?
It is used in precision data acquisition systems, medical instrumentation, industrial process controls, strain gages, and aerospace instrumentation.
- What is the input bias current of the AD8227ARMZ?
The input bias current is 20 nA.
- What are the package options for the AD8227ARMZ?
It is available in 8-TSSOP and 8-MSOP packages.
- What is the slew rate of the AD8227ARMZ?
The slew rate is 0.8 V/μs.
- Can the AD8227ARMZ handle voltages beyond the supply rails?
Yes, it can handle voltages beyond the supply rails, for example, ±35 V with a ±5 V supply.
- What is the operating temperature range of the AD8227ARMZ?
The operating temperature range is −40°C to +125°C.
- How does the reference terminal function in the AD8227ARMZ?
The output voltage is developed with respect to the potential on the reference terminal, allowing for level-shifting the output to a precise mid-supply level.
