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LM231N/NOPB +BOM

Precision voltage-to-frequency converter with 1-Hz to 100-kHz FS frequency (wide operating temp)

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

LM231N/NOPB
Datasheet:

LM231N/NOPB Datasheet (PDF)
Vs (min) (V):

4
Vs (max) (V):

40
Operating Temperature Range (°C):

-25 to 85
Rating:

Catalog
EDA/CAD Models:

Request Free CAD Models for LM231N/NOPB

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Tel: +852 95804164

LM231N/NOPB General Description

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 V_CC.

Key Features

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

Specifications

Vs (min) (V)	4	Vs (max) (V)	40
Product type	Frequency-to-voltage, Voltage-to-frequency	Operating temperature range (°C)	-25 to 85
Rating	Catalog	feature-resolution
feature-minimum-single-supply-voltage-v	4	feature-power-supply-type	Single
feature-minimum-dual-supply-voltage-v		feature-maximum-dual-supply-voltage-v
feature-packaging	Tube	feature-maximum-single-supply-voltage-v	40
feature-rad-hard		feature-pin-count	8
feature-cecc-qualified	No	feature-esd-protection	Yes
feature-escc-qualified		feature-military	No
feature-aec-qualified	No	feature-aec-qualified-number
feature-eccn-code	EAR99	feature-svhc	No
feature-svhc-exceeds-threshold	No

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Ratings and Reviews

I**a 04/07/2020

The order took a short time, did not tolerate and bought heat shrinkage in "eskore". Today 21 04 2019 stinky package came. All strictly according to the description 2; 3; 4; 4,5; 5; 6 and 7mm, the most commonly used in everyday life. Thank you.

J**b 03/13/2020

Very fast delivery, thank you very much seller. The goods came to the mailbox even before the tracking number still showed that the goods did not fly out of the country of origin))

O**t 02/16/2020

As in the description. I will use for soldering station. The length should be enough. If anything, it is possible to grow.

C**n 02/02/2020

The chip is not separated by datasheet. In general, the fee looks good. I haven't checked yet. It took a very short time.