LM331N Datasheet

Precision Voltage-to-Frequency Converters


The LM231/LM331 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 LM231A/LM331A attain a new high level of accuracy versus temperature which could only be attained with expensive voltage-to-frequency modules. Additionally the LM231/331 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 conver can be easily channeled through a simple photo isolator to provide isolation against high common mode levels. LM331N Features • Guaranteed linearity 0.01% max• Improved performance in existing voltage-to- frequency conversion applications• Split or single supply operation• Operates on single 5V supply• Pulse output compatible with all logic forms• Excellent temperature stability: ±50 ppm/°C max• Low power consumption: 15 mW typical at 5V• Wide dynamic range, 100 dB min at 10 kHz full scale frequency• Wide range of full scale frequency: 1 Hz to 100kHz• Low cost


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Manufacturer information


Omron is the world's leading supplier of technologically advanced electronic components. Omron's vast product line includes switches (general, snap-action, control, DIP/SIP, miniature, sub-miniature, and thumbwheel), relays, connectors, optoelectronics, and sensors that are used in consumer electronics, computer peripherals, office automation products, and telecom applications. Omron Industrial Automation supplies the world with advanced electronics and control system components, including switches, relays, power supplies, sensors, calibration equipment, and cable assemblies. Omron is a global leader in RFID technology with their extensive range of reliable products and systems, such as inlays, readers/writers, transponders, development tools, and accessories.

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