Overview
The LTC1966CMS8#PBF, produced by Analog Devices Inc., is a precision micropower RMS-to-DC converter that utilizes an innovative patented delta-sigma (∆Σ) computational technique. This converter is designed for high accuracy and linearity, making it suitable for a wide range of signal conditioning and conversion applications. The LTC1966 is simple to use, requiring only one capacitor for operation, and it offers a high level of accuracy and stability over various input signals and temperatures.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 2.7V to 5.5V (Single Supply), up to ±5.5V (Dual Supply) | V |
| Supply Current | 155 μA (Typ), 170 μA (Max) | μA |
| Shutdown Current | 0.1 μA | μA |
| Gain Accuracy (50Hz to 1kHz) | 0.1% | % |
| Total Error (50Hz to 1kHz) | 0.25% | % |
| Linearity | 0.02% | % |
| Bandwidth | 800kHz (–3dB), 6kHz (±1%) | kHz |
| Input Type | Differential or Single-Ended | |
| Common Mode Voltage Range | Rail-to-Rail | |
| Package Type | 8-Lead MSOP |
Key Features
- High Accuracy and Linearity: The LTC1966 offers 0.1% gain accuracy and 0.25% total error from 50Hz to 1kHz, along with 0.02% linearity, allowing for simple system calibration.
- Low Power Consumption: The converter has a low supply current of 155 μA (typical) and an ultralow shutdown current of 0.1 μA.
- Flexible Supplies: It can operate on a single supply from 2.7V to 5.5V or dual supplies up to ±5.5V.
- Flexible Inputs: Supports differential or single-ended inputs with a rail-to-rail common mode voltage range.
- Compact Package: Available in an 8-lead MSOP package, ideal for space-constrained and portable applications.
Applications
- True RMS Digital Multimeters and Panel Meters: Ideal for accurate AC and DC measurements.
- Test and Measurement Equipment: Suitable for various test and measurement applications requiring precise signal monitoring.
- Battery-Operated Devices: Low power operation makes it suitable for battery-powered systems.
- Signal Processing: Used in signal processing applications where accurate RMS measurements are necessary.
- Industrial Control Systems: Can be integrated into industrial control systems for precise signal conditioning.
Q & A
- What is the primary function of the LTC1966?
The LTC1966 is a true RMS-to-DC converter that converts input signals to their root mean square (RMS) value using delta-sigma technology.
- What is the typical supply current of the LTC1966?
The typical supply current of the LTC1966 is 155 μA.
- What is the shutdown current of the LTC1966?
The shutdown current of the LTC1966 is 0.1 μA.
- What is the gain accuracy of the LTC1966 from 50Hz to 1kHz?
The gain accuracy of the LTC1966 from 50Hz to 1kHz is 0.1%.
- What types of input signals does the LTC1966 support?
The LTC1966 supports both differential and single-ended input signals.
- What is the common mode voltage range of the LTC1966?
The LTC1966 has a rail-to-rail common mode voltage range.
- In what package types is the LTC1966 available?
The LTC1966 is available in an 8-lead MSOP package.
- What are some typical applications of the LTC1966?
Typical applications include true RMS digital multimeters, test and measurement equipment, battery-operated devices, signal processing, and industrial control systems.[
- How does the LTC1966 handle temperature and input variations?
The LTC1966 is insensitive to PC board soldering and stresses, as well as operating temperature, ensuring stable measurements over various conditions.[
- What is the bandwidth of the LTC1966?
The bandwidth of the LTC1966 is 800kHz (–3dB) and 6kHz (±1%).[
