SN65LVDT101DGKRG4

Product Overview

• Category: Integrated Circuit
• Use: LVDT (Linear Variable Differential Transformer) Signal Conditioner
• Characteristics:
  • Converts the analog output of an LVDT into a digital signal
  • Provides amplification, filtering, and demodulation functions
  • Supports LVDTs with primary excitation frequencies up to 200 kHz
• Package: DGKRG4 (8-pin VSSOP)
• Essence: Signal conditioning for LVDT sensors
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +125°C
• Input Offset Voltage: ±1 mV (maximum)
• Gain Error: ±0.1% (maximum)
• Output Voltage Swing: Rail-to-Rail
• Quiescent Current: 1.3 mA (typical)

Pin Configuration

The SN65LVDT101DGKRG4 has the following pin configuration:

```

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| | --| VDD GND |-- Pin 1: Power supply pins --| IN+ IN- |-- Pin 2 and 3: LVDT input pins --| OUT |-- Pin 4: Digital output --| REF NC |-- Pin 5 and 6: Reference voltage and No Connect --| VOS EN |-- Pin 7 and 8: Offset voltage adjustment and Enable |___________| ```

Functional Features

• LVDT Signal Conditioning: Converts LVDT analog output to digital signal
• Amplification: Provides adjustable gain for optimal signal processing
• Filtering: Includes low-pass filter to remove noise and unwanted frequencies
• Demodulation: Extracts the demodulated LVDT signal for further processing
• Offset Voltage Adjustment: Allows fine-tuning of output offset voltage
• Enable Pin: Controls the device's power consumption and operation

Advantages and Disadvantages

Advantages: - Compact package size - Wide supply voltage range - Rail-to-rail output swing - Adjustable gain and offset voltage - Low quiescent current

Disadvantages: - Limited to LVDT signal conditioning applications - Requires external reference voltage

Working Principles

The SN65LVDT101DGKRG4 is designed to interface with LVDT sensors, which are commonly used for linear position measurement. It amplifies and conditions the analog output of an LVDT, converting it into a digital signal that can be easily processed by microcontrollers or other digital systems.

The device includes an adjustable gain stage, allowing users to optimize the amplification based on their specific application requirements. It also features a low-pass filter to remove noise and unwanted frequencies from the LVDT signal. The demodulation circuitry extracts the demodulated LVDT signal, which can then be further processed as needed.

To ensure accurate operation, the SN65LVDT101DGKRG4 provides an offset voltage adjustment feature, allowing users to fine-tune the output offset voltage. This helps compensate for any inherent offset in the LVDT sensor itself.

The enable pin allows control over the device's power consumption and operation. By toggling this pin, users can put the device into a low-power standby mode when not actively processing LVDT signals.

Detailed Application Field Plans

The SN65LVDT101DGKRG4 is primarily used in applications where LVDT sensors are employed for linear position measurement. Some common application fields include:

1. Industrial Automation: LVDTs are widely used in industrial automation systems for precise position feedback in various machinery and equipment.
2. Robotics: LVDTs integrated with the SN65LVDT101DGKRG4 can provide accurate position feedback for robotic arms and manipulators.
3. Aerospace: LVDT-based displacement sensors are used in aerospace applications to monitor critical parameters such as wing deflection, landing gear position, and actuator displacement.
4. Automotive: LVDTs find application in automotive systems for measuring suspension travel, throttle position, and pedal position.
5. Medical Equipment: LVDT sensors, along with signal conditioners like the SN65LVDT101DGKRG4, are used in medical devices for precise linear displacement measurements.

Detailed and Complete Alternative Models

1. AD598: Analog Devices offers a similar LVDT signal conditioner with adjustable gain and offset voltage features. It operates from a single supply voltage and provides a demodulated output.
2. MAX9949: Maxim Integrated manufactures an LVDT signal conditioner with programmable gain and offset adjustment capabilities. It includes a low-pass filter and operates from a wide supply voltage range.
3. LTC1043: Linear Technology offers a versatile LVDT signal conditioner with adjustable gain, offset, and phase shift. It also includes a