LTC1968
PRODUCTIONPrecision Wide Bandwidth, RMS-to-DC Converter
- Part Models
- 4
- 1ku List Price
- Starting From $5.19
Part Details
- High Linearity:
- 0.02% Linearity Allows Simple System Calibration
- Wide Input Bandwidth:
- Bandwidth to 1% Additional Gain Error: 500kHz
- Bandwidth to 0.1% Additional Gain Error: 150kHz
- 3dB Bandwidth Independent of Input Voltage Amplitude
- No-Hassle Simplicity:
- True RMS-DC Conversion with Only One External Capacitor
- Delta Sigma Conversion Technology
- Ultralow Shutdown Current:
- 0.1µA
- 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
- Small Size:
- Space Saving 8-Pin MSOP Package
The LTC1968 is a true RMS-to-DC converter that uses an innovative delta-sigma computational technique. The benefits of the LTC1968 proprietary architecture, when compared to conventional log-antilog RMS-to-DC converters, are higher linearity and accuracy, bandwidth independent of amplitude and improved temperature behavior.
The LTC1968 operates with single-ended or differential input signals and accurately supports crest factors up to 4. Common mode input range is rail-to-rail. Differential input range is 1VPEAK, and offers unprecedented linearity. The LTC1968 allows hassle-free system calibration at any input voltage.
The LTC1968 has a rail-to-rail output with a separate output reference pin providing flexible level shifting; it operates on a single power supply from 4.5V to 5.5V. A low power shutdown mode reduces supply current to 0.1µA.
The LTC1968 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 1
Design Note 1
Technical Articles 4
Video 1
Press Release 1
3rd Party Solutions 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 |
|---|---|---|---|
| LTC1968CMS8#PBF | 8-Lead MSOP | ||
| LTC1968CMS8#TRPBF | 8-Lead MSOP | ||
| LTC1968IMS8#PBF | 8-Lead MSOP | ||
| LTC1968IMS8#TRPBF | 8-Lead MSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package |
||
| LTC1968CMS8#PBF | PRODUCTION | |
| LTC1968CMS8#TRPBF | PRODUCTION | |
| LTC1968IMS8#PBF | PRODUCTION | |
| LTC1968IMS8#TRPBF | PRODUCTION | |
|
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC1968CMS8#PBF | PRODUCTION | |
| LTC1968CMS8#TRPBF | PRODUCTION | |
| LTC1968IMS8#PBF | PRODUCTION | |
| LTC1968IMS8#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 |
| 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 1
Models for the following parts are available in LTspice:
- LTC1968
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
LTC1968CMS8 | RMS to DC Converter