Part # LM331 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM231A LM231 LM331A LM331 Precision Voltage-to-Frequency Converters

Part Details:

LM231A/LM231/LM331A/LM331 April 2006 LM231A/LM231/LM331A/LM331Precision Voltage-to-Frequency ConvertersGeneral Description over the full operating temperature range, at power suppliesas low as 4.0V. The precision timer circuit has low bias The LM231/LM331 family of voltage-to-frequency converters currents without degrading the quick response necessary for are ideally suited for use in simple low-cost circuits for 100 kHz voltage-to-frequency conversion. And the output analog-to-digital conversion, precision frequency-to-voltage are capable of driving 3 TTL loads, or a high voltage output conversion, long-term integration, linear frequency modula- up to 40V, yet is short-circuit-proof against V . CC tion or demodulation, and many other functions. The outputwhen used as a voltage-to-frequency converter is a pulse Features train at a frequency precisely proportional to the appliedinput voltage. Thus, it provides all the inherent advantages of n Guaranteed linearity 0.01% max the voltage-to-frequency conversion techniques, and is easy n Improved performance in existing voltage-to-frequency to apply in all standard voltage-to-frequency converter appli- conversion applications Precision cations. Further, the LM231A/LM331A attain a new high n Split or single supply operation level of accuracy versus temperature which could only be n Operates on single 5V supply attained with expensive voltage-to-frequency modules. Ad- n Pulse output compatible with all logic forms ditionally the LM231/331 are ideally suited for use in digital n Excellent temperature stability: ±50 ppm/°C max systems at low power supply voltages and can provide low- n Low power consumption: 15 mW typical at 5V cost analog-to-digital conversion in microprocessor- controlled systems. And, the frequency from a battery pow- n Wide dynamic range, 100 dB min at 10 kHz full scale V ered voltage-to-frequency converter can be easily channeled frequency oltage-to-Frequency through a simple photo isolator to provide isolation against n Wide range of full scale frequency: 1 Hz to 100 kHz high common mode levels. n Low cost The LM231/LM331 utilize a new temperature-compensatedband-gap reference circuit, to provide excellent accuracy Connection Diagram Dual-In-Line Package Converters 00568021 Order Number LM231AN, LM231N, LM331AN, or LM331N

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LM331.pdf Datasheet