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LM231AN Datasheet(PDF) 1 Page - Texas Instruments |
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LM231AN Datasheet(HTML) 1 Page - Texas Instruments |
1 / 20 page LM231, LM331 www.ti.com SNOSBI2B – JUNE 1999 – REVISED MARCH 2013 LM231A/LM231/LM331A/LM331 Precision Voltage-to-Frequency Converters Check for Samples: LM231, LM331 1 FEATURES DESCRIPTION The LM231/LM331 family of voltage-to-frequency 23 • Ensured Linearity 0.01% max converters are ideally suited for use in simple low- • Improved Performance in Existing Voltage-to- cost circuits for analog-to-digital conversion, precision Frequency Conversion Applications frequency-to-voltage conversion, long-term • Split or Single Supply Operation integration, linear frequency modulation or demodulation, and many other functions. The output • Operates on Single 5V Supply when used as a voltage-to-frequency converter is a • Pulse Output Compatible with All Logic Forms pulse train at a frequency precisely proportional to the • Excellent Temperature Stability: ±50 ppm/°C applied input voltage. Thus, it provides all the max inherent advantages of the voltage-to-frequency conversion techniques, and is easy to apply in all • Low Power Consumption: 15 mW Typical at 5V standard voltage-to-frequency converter applications. • Wide Dynamic Range, 100 dB min at 10 kHz Further, the LM231A/LM331A attain a new high level Full Scale Frequency of accuracy versus temperature which could only be • Wide Range of Full Scale Frequency: 1 Hz to attained with expensive voltage-to-frequency modules. Additionally the LM231/331 are ideally 100 kHz suited for use in digital systems at low power supply • Low Cost 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 LM231/LM331 utilize a new temperature- compensated band-gap reference circuit, to provide excellent accuracy over the full operating temperature range, at power supplies as low as 4.0V. 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 40V, yet is short-circuit-proof against VCC. CONNECTION DIAGRAM Figure 1. Plastic Dual-In-Line Package (PDIP) See Package Number P (R-PDIP-T8) 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 Teflon is a registered trademark of E. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 1999–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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