Overview
The AD8227ARZ, produced by Analog Devices Inc., is a low-cost, wide supply range instrumentation amplifier. It is designed to operate 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 handle input voltages below the negative supply, enabling the amplification of small signals near ground without the need for dual supplies. The AD8227ARZ is robust and can withstand input voltages beyond the supply rails, making it ideal for connecting to real-world sensors in multichannel, space-constrained applications.
Key Specifications
| Specification | Value |
|---|---|
| Gain Range | 5 to 1000 |
| Supply Voltage | Single supply: 2.2 V to 36 V, Dual supply: ±1.5 V to ±18 V |
| Bandwidth (G = 5) | 250 kHz |
| CMRR (G = 5) | 100 dB minimum (B Grade) |
| Input Noise | 24 nV/√Hz |
| Typical Supply Current | 350 μA |
| Operating Temperature | −40°C to +125°C |
| Package | 8-lead SOIC and MSOP |
Key Features
- Single external resistor for gain setting between 5 and 1000.
- Wide input range that can go below the negative supply voltage, allowing amplification of small signals near ground without dual supplies.
- Inputs protected beyond supply rails, withstanding up to ±35 V input with a ±5 V supply.
- Rail-to-rail output, enabling full use of supply rails.
- Low input noise of 24 nV/√Hz and high CMRR of 100 dB minimum (B Grade).
- Robust design suitable for connecting to real-world sensors.
- Compact 8-lead SOIC and MSOP packages, ideal for multichannel, space-constrained applications.
Applications
- Multichannel, space-constrained systems where compact packaging is crucial.
- Real-world sensor interfaces due to its robust input protection and wide operating range.
- Systems requiring high gain accuracy and low noise, such as medical devices, industrial control systems, and data acquisition systems.
- Single-supply ADC driving configurations, where the AD8227 can level-shift the output to match the ADC's input range.
Q & A
- What is the gain range of the AD8227ARZ?
The gain range of the AD8227ARZ is from 5 to 1000, set by a single external resistor.
- What is the operating supply voltage range for the AD8227ARZ?
The AD8227ARZ operates on single supplies from 2.2 V to 36 V and dual supplies from ±1.5 V to ±18 V.
- What is the bandwidth of the AD8227ARZ at a gain of 5?
The bandwidth of the AD8227ARZ at a gain of 5 is 250 kHz.
- How is the gain of the AD8227ARZ set?
The gain of the AD8227ARZ is set using a single external resistor connected across the RG terminals.
- What is the input noise of the AD8227ARZ?
The input noise of the AD8227ARZ is 24 nV/√Hz.
- What is the typical supply current of the AD8227ARZ?
The typical supply current of the AD8227ARZ is 350 μA.
- What is the operating temperature range of the AD8227ARZ?
The operating temperature range of the AD8227ARZ is from −40°C to +125°C.
- In what packages is the AD8227ARZ available?
The AD8227ARZ is available in 8-lead SOIC and MSOP packages.
- Can the AD8227ARZ handle input voltages beyond the supply rails?
Yes, the AD8227ARZ can handle input voltages beyond the supply rails, for example, up to ±35 V with a ±5 V supply.
- Is the AD8227ARZ suitable for multichannel applications?
Yes, the AD8227ARZ is ideal for multichannel, space-constrained applications due to its compact packaging and robust design.
