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 dissipation, 1...
LM331: 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 comp...
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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 dissipation, 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 100 kHz
Low cost
LM231A/LM231 | LM331A/LM331 | |
---|---|---|
Supply Voltage | 40V | 40V |
Output Short Circuit to Ground | Continuous | Continuous |
Output Short Circuit to VCC | Continuous | Continuous |
Input Voltage | −0.2V to +VS | −0.2V to +VS |
TMIN TMAX | TMIN TMAX | |
Operating Ambient Temperature Range | −25°C to +85°C | 0°C to +70°C |
Power Dissipation (PD at 25°C) | ||
and Thermal Resistance (A) | ||
(N Package) PD | 1.25W | 1.25W |
A | 100°C/W | 100°C/W |
Lead Temperature (Soldering, 10 sec.) | ||
Dual-In-Line Package (Plastic) | 260°C | 260°C |
ESD Susceptibility (Note 4) | ||
N Package | 500V | 500V |
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 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.
Reliability Metrics
Part Number | Process | EFR Reject | EFR Sample Size | PPM | LTA Rejects | LTA Device Hours | FITS | MTTF (Hours) |
LM331AN | SLM | 0 | 42786 | 0 | 0 | 3352500 | 2 | 951281028 |
LM331N | SLM | 0 | 42786 | 0 | 0 | 3352500 | 2 | 951281028 |
Application Notes
Title | Size in Kbytes | Date | |
AN-210: Application Note 210 New Phase-Locked-Loops Have Advantages as Frequency to Voltage Converters (and more) | 339 Kbytes | 3-Oct-02 | Download |
AN-240: Application Note 240 Wide-Range Current-to-Frequency Converters | 126 Kbytes | 3-Oct-02 | Download |
AN-285: Application Note 285 An Acoustic Transformer Powered Super‐High Isolation Amplifier | 172 Kbytes | 4-Oct-04 | Download |
AN-C: Application Note C V/F Converter ICs Handle Frequency-to-Voltage Needs | 187 Kbytes | 3-Oct-02 | Download |
AN-673: 2-Way Multiplexed LCD Drive and Low Cost A/D-Converter Using V/F Techniques with COP8 Microcontrollers | 526 Kbytes | 5-Aug-95 | Download |
AN-265: Application Note 265 An Electronic Watt-Watt-Hour Meter | 185 Kbytes | 3-Oct-02 | Download |
AN-D: Application Note D Versatile Monolithic V/Fs can Compute as Well as Convert with High Accuracy | 248 Kbytes | 3-Oct-02 | Download |
If you have trouble printing or viewing PDF file(s), see Printing Problems. |
More Application Notes
Title | Size in Kbytes | Date | |
AN-74: Application Note 74 LM139/LM239/LM339 A Quad of Independently Functioning Comparators | 702 Kbytes | 1-Oct-02 | Download |
AN-225: Application Note 225 IC Temperature Sensor Provides Thermocouple Cold-Junction Compensation | 89 Kbytes | 2-Oct-02 | Download |
AN-298: Application Note 298 Isolation Techniques for Signal Conditioning | 379 Kbytes | 2-Oct-02 | Download |
AN-242: Application Note 242 Applying a New Precision Op Amp | 383 Kbytes | 4-Oct-04 | Download |
AN-295: Application Note 295 A High Performance Industrial Weighing System | 117 Kbytes | 4-Oct-04 | Download |
AN-286: Application Note 286 Applications of the LM392 Comparator Op Amp IC | 135 Kbytes | 2-Oct-02 | Download |
AN-311: Application Note 311 Theory and Applications of Logarithmic Amplifiers | 258 Kbytes | 2-Oct-02 | Download |
AN-272: Application Note 272 Op Amp Booster Designs | 382 Kbytes | 2-Oct-02 | Download |
AN-288: Application Note 288 System-Oriented DC-DC Conversion Techniques | 405 Kbytes | 3-Oct-02 | Download |
AN-275: Application Note 275 CMOS D/A Converters Match Most Microprocessors | 127 Kbytes | 2-May-04 | Download |
AN-247: Application Note 247 Using the ADC0808/ADC0809 8-Bit µP Compatible A/D Converters with 8-Channel Analog Multiplexer | 547 Kbytes | 3-Oct-02 | Download |
AN-256: Application Note 256 Circuitry for Inexpensive Relative Humidity Measurement | 119 Kbytes | 2-Oct-02 | Download |
AN-258: Application Note 258 Data Acquisition Using the ADC0816 and ADC0817 8-Bit A/D Converter with On-Chip 16 Channel Multiplexer | 683 Kbytes | 4-Oct-04 | Download |
AN-284: Application Note 284 Single-Supply Applications of CMOS MICRODACs | 121 Kbytes | 3-Oct-02 | Download |
AN-274: Application Note 274 CMOS A/D Converter Interfaces Easily with Many Microprocessors | 73 Kbytes | 3-Oct-02 | Download |
AN-301: Application Note 301 Signal Conditioning for Sophisticated Transducers | 579 Kbytes | 2-Oct-02 | Download |
If you have trouble printing or viewing PDF file(s), see Printing Problems. |
The LM331 is one member of the LM331 family,this family of voltage-to-frequency converters are ideally suited for use in simple low-cost circuits for analog-to-digital conversion,precision frequencyto-voltage conversion,long-term integration, linear frequency modulation or demodulation and many other functions. It utilizes a new temperaturecompensated 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 is capable of driving 3 TTL loads,or a high voltage output up to 40V,yet is short-circuit-proof against VCC.
Features of the LM331 are:(1)improved performance in existing voltage-to-frequency conversion applications;(2)guaranteed linearity 0.01% max;(3)split or single supply operation;(4)operates on single 5V supply;(5)pulse output compatible with all logic forms;(6)excellent temperature stability,+/-50 ppm/ max;(7)low power dissipation,15 mW typical at 5V;(8)wide dynamic range,100 dB min at 10 kHz full scale frequency;(9)wide range of full scale frequency,1 Hz to 100 kHz;(10)low cost.
The absolute maximum ratings of the LM331 can be summarized as:(1)supply voltage:40 V;(2)output short circuit to ground:continuous;(3)output short circuit to Vcc:continuous;(4)input voltage:-0.2V to +Vs;(5)operating ambient temperature range:-55 to +125.If you want to know more information such as the electrical characteristics about the LM331,please download the datasheet in www.seekic.com .