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LM331AN/NOPB

Precision voltage-to-frequency converter with 1-Hz to 100-KHz full scale frequency;

US ECCN: EAR99 US/Local Export Classification Number

Inventory:

Quality information

RoHS Yes
REACH Yes
Lead finish / Ball material SN, Call TI
MSL rating / Peak reflow Level-1-NA-UNLIM
Quality, reliability
& packaging information

Information included:

  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
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Packaging information

Package | Pins Package qty | Carrier: Operating temperature range (°C)
PDIP (P) | 8 40 | TUBE
Package | Pins PDIP (P) | 8
Package qty | Carrier: 40 | TUBE
Operating temperature range (°C)
View TI packaging information

Features for the LM331

  • Ensured Linearity 0.01% Maximum
  • Improved Performance in Existing Voltage-to-
    Frequency Conversion Applications
  • Split or Single-Supply Operation
  • Operates on Single 5-V Supply
  • Pulse Output Compatible With All Logic Forms
  • Excellent Temperature Stability: ±50 ppm/°C
    Maximum
  • Low Power Consumption: 15 mW Typical at 5 V
  • Wide Dynamic Range, 100 dB Minimum at 10-kHz
    Full Scale Frequency
  • Wide Range of Full Scale Frequency:
    1 Hz to 100 kHz
  • Low-Cost

Description for the LM331

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.

Pricing


Qty Price (USD)
1-99 8.251
100-249 6.726
250-999 5.287
1,000+ 4.484