LTC1968 - Precision Wide Bandwidth, RMS-to-DC Converter
Features
- 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
AEC-Q100 data available for specific packages
Typical Application
Description
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.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC1968CMS8#PBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LTC1968CMS8#TRPBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LTC1968IMS8#PBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
| LTC1968IMS8#TRPBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC1968CMS8#PBF | MS-8 | C | $5.21 | $3.95 | Yes | |
| LTC1968CMS8#TRPBF | MS-8 | C | $4.01 | Yes | ||
| LTC1968IMS8#PBF | MS-8 | I | $8.80 | $6.60 | Yes | |
| LTC1968IMS8#TRPBF | MS-8 | I | $6.66 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC427B-C | LTC1968CMS8 | RMS to DC Converter | $50.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC1968IMS8#PBF | MS-8 | I | $8.80 | $6.60 | Yes | |
| LTC1968IMS8#TRPBF | MS-8 | I | $6.66 | Yes | ||
| Buy Now • Request Samples | ||||||
Applications
- True RMS Digital Multimeters and Panel Meters
- True RMS AC + DC Measurements
People Who Viewed This Product Also Viewed
- LTC1966 - Precision Micropower, Delta Sigma RMS-to-DC Converter
- LTC1967 - Precision Extended Bandwidth, RMS-to-DC Converter
- LT5400 - Quad Matched Resistor Network
- LTC6655 - 0.25ppm Noise, Low Drift Precision References
- LT1028 - Ultra Low Noise Precision High Speed Op Amps
- LT4320/LT4320-1 - Ideal Diode Bridge Controller
- LT3080 - Adjustable 1.1A Single Resistor Low Dropout Regulator
- LT1210 - 1.1A, 35MHz Current Feedback Amplifier
- LT3083 - Adjustable 3A Single Resistor Low Dropout Regulator
- LTZ1000 - Ultra Precision Reference
Product Notifications
Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.
Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.
Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
Models for the following parts are available in LTspice:
LTC1968
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
