Overview
The LTC1966CMS8#TRPBF is a precision micropower ΔΣ (delta-sigma) RMS-to-DC converter produced by Analog Devices Inc. This component is designed to provide accurate and efficient conversion of RMS (Root Mean Square) values to DC (Direct Current) signals. It utilizes an innovative patented ΔΣ computational technique, making it simpler to use, more accurate, lower power, and more flexible than conventional log antilog RMS-to-DC converters.
The LTC1966 is particularly suited for applications requiring high accuracy and low power consumption, making it ideal for a wide range of signal conditioning and conversion tasks.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 2.7V to 5.5V (Single Supply), up to ±5.5V (Dual Supply) |
| Supply Current | 155 μA (Typ), 170 μA (Max) |
| Shutdown Current | 0.1 μA |
| Gain Accuracy | 0.1% from 50Hz to 1kHz |
| Total Error | 0.25% from 50Hz to 1kHz |
| Linearity | 0.02% |
| Input Type | Differential or Single-Ended |
| Common Mode Input Range | Rail-to-Rail |
| Differential Input Range | Up to 1V PEAK |
| Output Type | Rail-to-Rail Output with separate output reference pin |
| Operating Temperature | –55°C to 125°C |
| Package | 8-Pin MSOP |
Key Features
- High Accuracy and Linearity: 0.1% gain accuracy and 0.25% total error from 50Hz to 1kHz, with 0.02% linearity allowing for simple system calibration.
- Low Power Consumption: Typical supply current of 155 μA and ultralow shutdown current of 0.1 μA.
- Flexible Supplies: Operates on a single supply from 2.7V to 5.5V or dual supplies up to ±5.5V.
- Flexible Inputs: Accepts single-ended or differential input signals with rail-to-rail common mode input range.
- Rail-to-Rail Output: With a separate output reference pin for level shifting.
- Compact Package: Space-saving 8-pin MSOP package ideal for portable applications.
Applications
- True RMS Digital Multimeters and Panel Meters: For accurate AC and DC measurements.
- Test and Measurement Equipment: Suitable for various signal conditioning and conversion tasks.
- Battery-Operated Devices: Low power operation extends battery life in portable devices.
- Signal Processing: For precise signal monitoring and analysis.
- Industrial Control Systems: For stable and accurate measurements over temperature and input variations.
Q & A
- What is the typical supply current of the LTC1966?
The typical supply current of the LTC1966 is 155 μA, with a maximum of 170 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 is the total error of the LTC1966 from 50Hz to 1kHz?
The total error of the LTC1966 from 50Hz to 1kHz is 0.25%.
- What types of input signals does the LTC1966 support?
The LTC1966 supports single-ended or differential input signals.
- What is the common mode input range of the LTC1966?
The common mode input range of the LTC1966 is rail-to-rail.
- What is the operating temperature range of the LTC1966?
The operating temperature range of the LTC1966 is –55°C to 125°C.
- What package type is the LTC1966 available in?
The LTC1966 is available in an 8-pin 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 system calibration?
The LTC1966 allows for hassle-free system calibration at any input voltage due to its superior linearity.
