Overview
The AD8225ARZ is a precision instrumentation amplifier produced by Analog Devices Inc. It is designed with a fixed gain of 5, setting new standards in performance. The amplifier is notable for its high common-mode rejection ratio (CMRR), which enables the rejection of high-frequency common-mode voltage, thereby reducing noise from sources such as utility lines and industrial equipment. This makes it highly suitable for applications requiring accurate signal amplification with minimal noise and distortion.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Gain | 5 | V/V |
| Gain Error | -0.1 to +0.1 | % |
| Nonlinearity | ±2 ppm | - |
| Offset Voltage (RTI) | 50 to 150 | µV |
| Offset Drift | 0.3 to 2 | µV/°C |
| Input Bias Current | 1.2 nA | - |
| Input Operating Impedance (Differential) | 10^12 Ω || 2 pF | - |
| Input Voltage Range (Common-Mode) | -VS + 1.6 to +VS - 1.0 V | - |
| Slew Rate | 5 V/µs | - |
| Bandwidth | 900 kHz | - |
| Supply Voltage (Single/Dual) | 3.4 V to 36 V, ±1.7 V to ±18 V | - |
| Operating Temperature | -40°C to +85°C | - |
| Package | 8-Lead SOIC | - |
Key Features
- High-Speed Data Acquisition: The amplifier supports fast data processing, making it suitable for real-time applications.
- Precision Clock Jitter Reduction: This feature contributes to improved system stability and accuracy.
- Integrated Clock Generation: The amplifier includes a built-in clock source, simplifying the overall design.
- Symmetric Amplifier Architecture: This design reduces interference effects and distortion, particularly important for high-speed signals.
- Low Power Consumption & Robust EMI Immunity: These features contribute to efficient system operation and reduced electromagnetic interference.
- No External Components Required: The amplifier operates without the need for external components, simplifying the circuit design.
- High CMRR: The AD8225 offers a high CMRR of 86 dB at DC and 80 dB up to 10 kHz, ensuring excellent rejection of common-mode noise.
- Low Input Offset Voltage and Drift: The amplifier has a low input offset voltage of 50 µV to 150 µV and a low offset drift of 0.3 µV/°C to 2 µV/°C.
Applications
- Patient Monitors: Suitable for patient monitoring applications due to its high CMRR and low noise characteristics.
- Current Transmitters: Used in current transmitter applications where precise signal amplification is required.
- Multiplexed Systems: Ideal for multiplexed systems where multiple signals need to be processed accurately.
- 4 to 20 mA Converters: Used in converting 4 to 20 mA signals, which is common in industrial control systems.
- Bridge Transducers and Sensor Signal Conditioning: The AD8225 is used to condition signals from bridge transducers and other sensors, ensuring accurate and noise-free signal processing.
- Medical Equipment and Industrial Sensors: The amplifier is well-suited for various medical and industrial applications requiring high precision and low noise.
- Data Acquisition Systems and Test Instrumentation: Its high-speed and low-noise characteristics make it ideal for data acquisition systems and test instrumentation.
Q & A
- What is the fixed gain of the AD8225ARZ?
The fixed gain of the AD8225ARZ is 5 V/V.
- What is the common-mode rejection ratio (CMRR) of the AD8225ARZ?
The CMRR of the AD8225ARZ is 86 dB at DC and 80 dB up to 10 kHz.
- What is the input offset voltage of the AD8225ARZ?
The input offset voltage of the AD8225ARZ is 50 µV to 150 µV.
- What is the slew rate of the AD8225ARZ?
The slew rate of the AD8225ARZ is 5 V/µs.
- What is the bandwidth of the AD8225ARZ?
The bandwidth of the AD8225ARZ is 900 kHz.
- What are the supply voltage ranges for the AD8225ARZ?
The supply voltage ranges for the AD8225ARZ are 3.4 V to 36 V for single supply and ±1.7 V to ±18 V for dual supply.
- What is the operating temperature range of the AD8225ARZ?
The operating temperature range of the AD8225ARZ is -40°C to +85°C.
- In what package is the AD8225ARZ available?
The AD8225ARZ is available in an 8-Lead SOIC package.
- What are some typical applications of the AD8225ARZ?
The AD8225ARZ is typically used in patient monitors, current transmitters, multiplexed systems, 4 to 20 mA converters, bridge transducers, sensor signal conditioning, medical equipment, industrial sensors, data acquisition systems, and test instrumentation.
- Does the AD8225ARZ require external components to operate?
No, the AD8225ARZ does not require external components to operate.
