The LMx31 family of voltage-to-frequency converters are ideally suited for use in simple low-cost circuits for analog-to-digital conversion, precision frequency-to-voltage conversion, long-term integration, linear frequency modulation or demodulation, and many other functions. The output when used as a voltage-to-frequency converter is a pulse train at a frequency precisely proportional to the applied input voltage. Thus, it provides all the inherent advantages of the voltage-to-frequency conversion techniques, and is easy to apply in all standard voltage-to-frequency converter applications.
Further, the LMx31A attain a new high level of accuracy versus temperature which could only be attained with expensive voltage-to-frequency modules. Additionally the LMx31 are ideally suited for use in digital systems at low power supply voltages and can provide low-cost analog-to-digital conversion in microprocessor-controlled systems. And, the frequency from a battery-powered voltage-to-frequency converter can be easily channeled through a simple photo isolator to provide isolation against high common-mode levels.
The LMx31 uses a new temperature-compensated band-gap reference circuit, to provide excellent accuracy over the full operating temperature range, at power supplies as low as 4 V. The precision timer circuit has low bias currents without degrading the quick response necessary for 100-kHz voltage-to-frequency conversion. And the output are capable of driving 3 TTL loads, or a high-voltage output up to 40 V, yet is short-circuit-proof against VCC.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LMx31x Precision Voltage-to-Frequency Converters datasheet (Rev. C) | PDF | HTML | 29 Sep 2015 |
| Application note | AN-240 Wide-Range Current-to-Frequency Converters (Rev. B) | 29 Apr 2013 | ||
| Application note | Versatile Monolithic V/Fs can Compute as Well as Convert with High Accuracy (Rev. B) | 29 Apr 2013 | ||
| Application note | AN-265 An Electronic Watt-Watt-Hour Meter (Rev. B) | 26 Apr 2013 | ||
| Application note | New Phase-Locked-Loops Have Advangs as Freq to Voltage Cnvrtrs (Rev. B) | 26 Apr 2013 | ||
| Application note | AN-311 Theory and Applications of Logarithmic Amplifiers (Rev. B) | 23 Apr 2013 | ||
| Application note | AN-C V/F Converter ICs Handle Frequency-to-Voltage Needs (Rev. B) | 23 Apr 2013 | ||
| Application note | An Acoustic Transformer Powered Super-High Isolation Amplifier | 04 Oct 2004 | ||
| Application note | 2-Way Multiplexed LCD Drv & Low Cost ADC Using V/F Tech w/COP8 Microcontrollers | 14 May 2004 | ||
| Application note | Freq-to-Vltg Converter Uses Sample-and-Hold to Improve Response & Ripple | 03 Oct 2002 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| PDIP (P) | 8 | Ultra Librarian |
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