Overview
The AD8227BRMZ is a low-cost, wide supply range instrumentation amplifier produced by Analog Devices Inc. This amplifier is designed to be highly versatile, requiring only one external resistor to set any gain between 5 and 1000. It features a wide input range and rail-to-rail output, allowing the signal to make full use of the supply rails. The AD8227BRMZ can operate with supplies ranging from ±1.5 V to ±18 V (or 2.2 V to 36 V single supply), making it suitable for a variety of applications. Its robust inputs are designed to connect to real-world sensors and can handle voltages beyond the supply rails, ensuring reliability in harsh environments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Gain Range | 5 to 1000 | - |
| Supply Voltage (Single) | 2.2 V to 36 V | V |
| Supply Voltage (Dual) | ±1.5 V to ±18 V | V |
| Operating Temperature | -40°C to +125°C | °C |
| Input Bias Current | 20 nA | nA |
| Input Offset Voltage | 100 µV | µV |
| Output Type | Rail-to-Rail | - |
| Bandwidth (G = 1) | 250 kHz | kHz |
| Slew Rate | 0.8 V/µs | V/µs |
| Supply Current | 350 µA | µA |
| Package | 8-MSOP | - |
Key Features
- Wide Supply Range: Operates on supplies ranging from ±1.5 V to ±18 V (or 2.2 V to 36 V single supply).
- Rail-to-Rail Output: Allows the signal to make full use of the supply rails.
- Single External Resistor for Gain Setting: Sets any gain between 5 and 1000.
- Input Protection: Inputs are protected beyond the supply rails, withstanding up to ±35 V with a ±5 V supply.
- Reference Terminal: Output voltage can be offset to a precise mid-supply level using the REF pin.
- Low Power Consumption: Typical supply current of 350 µA.
- High CMRR and Bandwidth: Minimum CMRR of 90 dB and bandwidth of 250 kHz at G = 1.
Applications
- Multichannel and Space-Constrained Applications: Ideal for systems where multiple channels are required in a limited space.
- Sensor Interfaces: Robust inputs suitable for connecting to real-world sensors.
- Industrial Automation: Suitable for various industrial automation tasks due to its wide operating range and input protection.
- Medical Devices: Can be used in medical devices requiring precise signal amplification and low noise.
- Automotive Systems: Operates over a wide temperature range, making it suitable for automotive applications.
Q & A
- What is the gain range of the AD8227BRMZ?
The gain range of the AD8227BRMZ is from 5 to 1000, set by a single external resistor.
- What are the supply voltage ranges for the AD8227BRMZ?
The AD8227BRMZ can operate with single supplies from 2.2 V to 36 V or dual supplies from ±1.5 V to ±18 V.
- What is the operating temperature range of the AD8227BRMZ?
The operating temperature range is -40°C to +125°C.
- How is the gain of the AD8227BRMZ set?
The gain is set using a single external resistor connected across the RG terminals.
- What is the typical supply current of the AD8227BRMZ?
The typical supply current is 350 µA.
- What is the bandwidth of the AD8227BRMZ at a gain of 1?
The bandwidth at a gain of 1 is 250 kHz.
- How is the output voltage offset in the AD8227BRMZ?
The output voltage can be offset using the REF pin to level-shift the output to a precise mid-supply level.
- What kind of input protection does the AD8227BRMZ have?
The inputs are protected beyond the supply rails, withstanding up to ±35 V with a ±5 V supply.
- What is the slew rate of the AD8227BRMZ?
The slew rate is 0.8 V/µs.
- In what package is the AD8227BRMZ available?
The AD8227BRMZ is available in an 8-MSOP package.
