LTC1966
PRODUCTIONPrecision Micropower ΔΣ RMS-to-DC Converter
- Part Models
- 8
- 1ku List Price
- Starting From $3.89
Part Details
- Simple to Use, Requires One Capacitor
- True RMS DC Conversion Using ∆Σ Technology
- High Accuracy:
- 0.1% Gain Accuracy from 50Hz to 1kHz
- 0.25% Total Error from 50Hz to 1kHz
- High Linearity:
- 0.02% Linearity Allows Simple System Calibration
- Low Supply Current:
- 155μA Typ, 170μA Max
- Ultralow Shutdown Current:
- 0.1μA
- Constant Bandwidth:
- Independent of Input Voltage
- 800kHz –3dB, 6kHz ±1%
- Flexible Supplies:
- 2.7V to 5.5V Single Supply
- Up to ±5.5V Dual Supply
- Flexible Inputs:
- Differential or Single-Ended
- Rail-to-Rail Common Mode Voltage Range
- Up to 1VPEAK Differential Voltage
- Flexible Output:
- Rail-to-Rail Output
- Separate Output Reference Pin Allows Level Shifting
- Wide Temperature Range:
- –55°C to 125°C
- Small Size:
- Space Saving 8-Pin MSOP Package
The LTC1966 is a true RMS-to-DC converter that utilizes an innovative patented ∆Σ computational technique. The internal delta sigma circuitry of the LTC1966 makes it simpler to use, more accurate, lower power and dramatically more flexible than conventional log antilog RMS-to-DC converters.
The LTC1966 accepts single-ended or differential input signals (for EMI/RFI rejection) and supports crest factors up to 4. Common mode input range is rail-to-rail. Differential input range is 1VPEAK, and offers unprecedented linearity. Unlike previously available RMS-to-DC converters, the superior linearity of the LTC1966 allows hassle free system calibration at any input voltage.
The LTC1966 also has a rail-to-rail output with a separate output reference pin providing flexible level shifting. The LTC1966 operates on a single power supply from 2.7V to 5.5V or dual supplies up to ±5.5V. A low power shutdown mode reduces supply current to 0.5μA.
The LTC1966 is insensitive to PC board soldering and stresses, as well as operating temperature. The LTC1966 is packaged in the space saving MSOP package which is ideal for portable applications.
Applications
- True RMS Digital Multimeters and Panel Meters
- True RMS AC + DC Measurements
Documentation
Data Sheet 1
Reliability Data 1
User Guide 1
Application Note 2
Design Note 2
Technical Articles 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC1966CMS8#PBF | 8-Lead MSOP | ||
| LTC1966CMS8#TRPBF | 8-Lead MSOP | ||
| LTC1966HMS8#PBF | 8-Lead MSOP | ||
| LTC1966HMS8#TRPBF | 8-Lead MSOP | ||
| LTC1966IMS8#PBF | 8-Lead MSOP | ||
| LTC1966IMS8#TRPBF | 8-Lead MSOP | ||
| LTC1966MPMS8#PBF | 8-Lead MSOP | ||
| LTC1966MPMS8#TRPBF | 8-Lead MSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package |
||
| LTC1966CMS8#PBF | PRODUCTION | |
| LTC1966CMS8#TRPBF | PRODUCTION | |
| LTC1966HMS8#PBF | PRODUCTION | |
| LTC1966HMS8#TRPBF | PRODUCTION | |
| LTC1966IMS8#PBF | PRODUCTION | |
| LTC1966IMS8#TRPBF | PRODUCTION | |
| LTC1966MPMS8#PBF | PRODUCTION | |
| LTC1966MPMS8#TRPBF | PRODUCTION | |
|
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC1966CMS8#PBF | PRODUCTION | |
| LTC1966CMS8#TRPBF | PRODUCTION | |
| LTC1966HMS8#PBF | PRODUCTION | |
| LTC1966HMS8#TRPBF | PRODUCTION | |
| LTC1966IMS8#PBF | PRODUCTION | |
| LTC1966IMS8#TRPBF | PRODUCTION | |
| LTC1966MPMS8#PBF | PRODUCTION | |
| LTC1966MPMS8#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Analog Temperature Sensors 1 | ||
| LTC2997 | PRODUCTION | Remote/Internal Temperature Sensor |
| Ideal Diode Bridge 1 | ||
|
LT4320 LT4320-1 |
Ideal Diode Bridge Controller | |
| Low Power Comparators 1 | ||
| LTC1540 | PRODUCTION | Nanopower Comparator with Reference |
| Precision Resistor Network 1 | ||
| LT5400 | RECOMMENDED FOR NEW DESIGNS | Quad Matched Resistor Network |
| Single Channel A/D Converters 1 | ||
| LTC2460 | PRODUCTION | Ultra-Tiny, 16-Bit ΔΣ ADCs with 10ppm/°C Max Precision Reference |
Tools & Simulations
LTspice 2
Models for the following parts are available in LTspice:
- LTC1966
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LTC1966CMS8 | RMS to DC Converter