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Part Number: LTC1966
Description: The LTC®1966 is a true RMS-to-DC converter that utilizesan innovative patented ∆ ...
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LTC1966
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DataSheet
General Description
LTC1966 General Description
The LTC®1966 is a true RMS-to-DC converter that utilizesan innovative patented ∆ computational technique. Theinternal delta-sigma circuitry of the LTC1966 makes it sim-pler to use, more accurate, lower power and dramaticallymore flexible than conventional log-antilog RMS-to-DCconverters.
The LTC1966 accepts single ended or differential inputsignals (for EMI/RFI rejection) and supports crest factorsup to 4. Common mode input range is rail-to-rail. Differ-ential input range is 1VPEAK, and offers unprecedented lin-earity. Unlike previously available RMS-to-DC converters,the superior linearity of the LTC1966 allows hassle-freesystem calibration at any input voltage.
The LTC1966 also has a rail-to-rail output with a separateoutput reference pin providing flexible level shifting. TheLTC1966 operates on a single power supply from 2.7V to5.5V or dual supplies up to ±5.5V. A low power shutdownmode reduces supply current to 0.5µA.
The LTC1966 is insensitive to PC board soldering andstresses, as well as operating temperature. The LTC1966is packaged in the space-saving MSOP package which isideal for portable applications.
LTC1966 Maximum Ratings
Supply Voltage
VDD to GND .................................................... 0.3 to 7V
VDD to VSS ................................................ 0.3V to 12V
VSS to GND................................................... 7V to 0.3V
Input Currents (Note 2) ...................................... ±10mA
Output Current (Note 3) ..................................... ±10mA
ENABLE Voltage ....................... VSS 0.3V to VSS + 12V
OUT RTN Voltage ................................. VSS 0.3V to VDD
Operating Temperature Range (Note 4)
LTC1966C/LTC1966I ............................. 40°C to 85°C
Specified Temperature Range (Note 5)
LTC1966C/LTC1966I ......................... .... 40°C to 85°C
Maximum Junction Temperature ........................... 150°C
Storage Temperature Range ............ .. 65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
VDD to GND .................................................... 0.3 to 7V
VDD to VSS ................................................ 0.3V to 12V
VSS to GND................................................... 7V to 0.3V
Input Currents (Note 2) ...................................... ±10mA
Output Current (Note 3) ..................................... ±10mA
ENABLE Voltage ....................... VSS 0.3V to VSS + 12V
OUT RTN Voltage ................................. VSS 0.3V to VDD
Operating Temperature Range (Note 4)
LTC1966C/LTC1966I ............................. 40°C to 85°C
Specified Temperature Range (Note 5)
LTC1966C/LTC1966I ......................... .... 40°C to 85°C
Maximum Junction Temperature ........................... 150°C
Storage Temperature Range ............ .. 65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
LTC1966 Features
No-Hassle Simplicity:True RMS-DC Conversion with Only One ExternalCapacitorDelta Sigma Conversion Technology
High Accuracy:0.1% Gain Accuracy from 50Hz to 1kHz0.25% Total Error from 50Hz to 1kHz
High Linearity:0.02% Linearity Allows Simple System Calibratio
Low Supply Current:155µA Typ, 170µA Max
Ultralow Shutdown Current:0.1µA
Constant Bandwidth:Independent of Input Voltage800kHz 3dB, 6kHz ±1%
Flexible Supplies:2.7V to 5.5V Single SupplyUp to ±5.5V Dual Supply
Flexible Inputs:Differential or Single EndedRail-to-Rail Common Mode Voltage RangeUp to 1VPEAK Differential Voltage
Flexible Output:Rail-to-Rail OutputSeparate Output Reference Pin Allows Level Shifting
Small Size:Space Saving 8-Pin MSOP Package
High Accuracy:0.1% Gain Accuracy from 50Hz to 1kHz0.25% Total Error from 50Hz to 1kHz
High Linearity:0.02% Linearity Allows Simple System Calibratio
Low Supply Current:155µA Typ, 170µA Max
Ultralow Shutdown Current:0.1µA
Constant Bandwidth:Independent of Input Voltage800kHz 3dB, 6kHz ±1%
Flexible Supplies:2.7V to 5.5V Single SupplyUp to ±5.5V Dual Supply
Flexible Inputs:Differential or Single EndedRail-to-Rail Common Mode Voltage RangeUp to 1VPEAK Differential Voltage
Flexible Output:Rail-to-Rail OutputSeparate Output Reference Pin Allows Level Shifting
Small Size:Space Saving 8-Pin MSOP Package
LTC1966 Typical Application
True RMS Digital Multimeters and Panel Meters
True RMS AC + DC Measurements
True RMS AC + DC Measurements
LTC1966 Connection Diagram
LTC1966
PDF/DataSheet Download
- Datasheet: LTC1966
- File Size: 343715 KB
- Manufacturer: Linear
- Click here to Download
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