Overview
The AD598SD/883B, produced by Analog Devices Inc., is a complete, monolithic Linear Variable Differential Transformer (LVDT) signal conditioning subsystem. This device is designed to work in conjunction with LVDTs to convert transducer mechanical position into a unipolar or bipolar DC voltage with high accuracy and repeatability. The AD598SD/883B integrates all necessary circuit functions on a single chip, including a sine wave oscillator, power amplifier, decoder, filter, and output amplifier. This integration eliminates the need for external adjustments and improves temperature stability and transducer interchangeability.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Temperature Range | –40°C to +85°C | Celsius |
| Package Type | Ceramic DIP-20 | |
| Total Supply Voltage | +36 V | Volt |
| Storage Temperature Range | –65°C to +150°C | Celsius |
| Power Dissipation (up to +65°C) | 1.2 W | Watt |
| Derating Above +65°C | 12 mW/°C | mW/°C |
| Thermal Characteristics (θJC) | 25°C/W | °C/W |
| Thermal Characteristics (θJA) | 85°C/W | °C/W |
Key Features
- Single Chip Solution: Contains internal oscillator and voltage reference.
- No Adjustments Required: Eliminates the need for external adjustments.
- Insensitive to Transducer Null Voltage and Phase Shifts: Improves system accuracy and reliability.
- Improved Temperature Stability: Enhances performance over a wide temperature range.
- Transducer Interchangeability: Allows for easy replacement of LVDTs without affecting system performance.
- Multiple LVDT Support: Can drive multiple LVDTs in series or parallel within power dissipation limits.
- Remote Operation Capability: Can drive LVDTs at the end of 300 feet of cable and output signals up to 1000 feet.
- Loop Integrator Capability: Can be used in the design of simple electromechanical servo loops.
Applications
- Telemetry Systems: Suitable for use in telemetry applications where interface electronics may be remote from the LVDT.
- Hostile Environments: Can operate in hostile environments due to its robust design and insensitivity to phase shifts and signal magnitudes.
- Electromechanical Servo Loops: Can be used as a loop integrator in the design of simple electromechanical servo loops.
- Industrial Automation: Ideal for industrial automation applications requiring precise position sensing and control.
Q & A
- What is the primary function of the AD598SD/883B?
The AD598SD/883B is a Linear Variable Differential Transformer (LVDT) signal conditioning subsystem that converts transducer mechanical position into a unipolar or bipolar DC voltage.
- What are the key components integrated into the AD598SD/883B?
The device includes a sine wave oscillator, power amplifier, decoder, filter, and output amplifier.
- What are the benefits of the ratiometric architecture used in the AD598SD/883B?
The ratiometric architecture eliminates the need for adjustments, is insensitive to transducer null voltage and phase shifts, and improves temperature stability and transducer interchangeability.
- What is the temperature range for the AD598SD/883B?
The temperature range is –40°C to +85°C.
- What type of package is the AD598SD/883B available in?
The device is available in a Ceramic DIP-20 package.
- Can the AD598SD/883B drive multiple LVDTs?
Yes, it can drive multiple LVDTs in series or parallel within power dissipation limits.
- How far can the AD598SD/883B drive an LVDT and its output signal?
The device can drive an LVDT at the end of 300 feet of cable and output signals up to 1000 feet.
- Is the AD598SD/883B suitable for use in hostile environments?
Yes, it is suitable for use in hostile environments due to its robust design and insensitivity to phase shifts and signal magnitudes.
- Can the AD598SD/883B be used in electromechanical servo loops?
Yes, it can be used as a loop integrator in the design of simple electromechanical servo loops.
- What is the maximum total supply voltage for the AD598SD/883B?
The maximum total supply voltage is +36 V.
