ad421 Datasheet - Analogdevices
The AD421 is a high accuracy, low noise, and low drift instrumentation amplifier. It is designed for a wide range of applications including medical equipment,...
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📝 Component Overview
The AD421 is a high accuracy, low noise, and low drift instrumentation amplifier. It is designed for a wide range of applications including medical equipment, industrial control systems, and test equipment. The device features a high common-mode rejection ratio, making it suitable for use in noisy environments.
Key Features and Benefits
- High accuracy: ±0.05% max nonlinearity
- Low noise: 12 nV/√Hz typ @ 1 kHz
- Low drift: 0.5 μV/°C typ
- High common-mode rejection ratio: 120 dB min
- Low power consumption: 1.2 mA max
- Wide operating temperature range: -40°C to +85°C
- Available in 8-lead MSOP and 8-lead SOIC packages
Typical Applications
- Medical equipment
- Industrial control systems
- Test equipment
- Data acquisition systems
- Process control systems
- Aerospace and defense systems
📊 Complete Technical Specifications
Absolute Maximum Ratings
| Parameter | Value |
|---|---|
| Supply Voltage | ±18V |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -65°C to +150°C |
Electrical Characteristics
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Nonlinearity | G = 1, VCM = 0V | 0.02% | 0.05% | 0.1% | % |
| Noise | G = 1, VCM = 0V, f = 1 kHz | 10 nV/√Hz | 12 nV/√Hz | 15 nV/√Hz | nV/√Hz |
Package Information
- 8-lead MSOP: Mini Small Outline Package
- 8-lead SOIC: Small Outline Integrated Circuit
Pin Configuration
- Pin 1: V+ - Positive supply voltage
- Pin 2: V- - Negative supply voltage
🔧 Application Guidelines
Design Considerations
When designing with the AD421, consider the gain setting, input voltage range, and noise requirements. The device is suitable for a wide range of applications, but proper design and layout are crucial for optimal performance.
Installation Guidelines
The AD421 is available in 8-lead MSOP and 8-lead SOIC packages. Ensure proper thermal management and follow standard IC installation procedures to prevent damage.
Operational Notes
The AD421 is a high accuracy device, but it is not immune to environmental factors. Ensure the device is operated within the specified temperature range and avoid exposure to extreme conditions.