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National P/N LM331 - Precision Voltage-to-Frequency Converter
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 photoisolator 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.
Features
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Guaranteed linearity 0.01% max
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Improved performance in existing voltage-to-frequency conversion applications
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Split or single supply operation
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Operates on single 5V supply
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Pulse output compatible with all logic forms
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Excellent temperature stability, ±50 ppm/°C max
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Low power dissipation, 15 mW typical at 5V
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Wide dynamic range, 100 dB min at 10 kHz full scale frequency
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Wide range of full scale frequency, 1 Hz to 100 kHz
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Low cost
Application Notes
Title
Size in Kbytes Date
View Online Download Receive via Email
AN-C: V/F Converter ICs Handle
Frequency-to-Voltage Needs
145 Kbytes
4-Nov-95 View Online
Download Receive via Email
AN-240: Wide-Range Current-to-
Frequency Converters
128 Kbytes
4-Nov-95 View Online
Download Receive via Email
AN-210: New Phase-Locked-
Loops Have Advantages as
Frequency to Voltage Converters
(and more)
183 Kbytes
4-Nov-95 View Online
Download Receive via Email
AN-D: Versatile Monolithic V/Fs
Can Compute as Well as Convert
with High Accuracy
169 Kbytes
4-Nov-95 View Online
Download Receive via Email
CN-1: Analog to Digital
Conversion Techniques with COPS
Family Microcontrollers
601 Kbytes
28-Jun-96 View Online
Download Receive via Email
AN-285: An Acoustic Transformer
Powered Super-High Isolation
Amplifier
113 Kbytes
9-Apr-96 View Online
Download Receive via Email
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相关代理商/技术参数
LM331N 功能描述:电压频率转换及频率电压转换 RoHS:否 制造商:Texas Instruments 全标度频率:4000 KHz 线性误差:+/- 1 % FSR 电源电压-最大: 电源电压-最小: 最大工作温度:+ 85 C 最小工作温度:- 25 C 安装风格:Through Hole 封装 / 箱体:PDIP-14 封装:Tube
LM331N 制造商:Texas Instruments 功能描述:IC V/F CONVERTER DIP8 331
LM331N/A+ 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage-to-Frequency Converter
LM331N/B+ 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage-to-Frequency Converter
LM331N/HALF 制造商:Texas Instruments 功能描述:IC V/F CONVERTER DIP8 331
LM331N/NOPB 功能描述:电压频率转换及频率电压转换 PREC VLTG-TO-FREQ CONVERTER RoHS:否 制造商:Texas Instruments 全标度频率:4000 KHz 线性误差:+/- 1 % FSR 电源电压-最大: 电源电压-最小: 最大工作温度:+ 85 C 最小工作温度:- 25 C 安装风格:Through Hole 封装 / 箱体:PDIP-14 封装:Tube
LM331N/NOPB 制造商:Texas Instruments 功能描述:Voltage / Frequency (V/F & F/V) Converte
LM331NNOPB 制造商:Texas Instruments 功能描述: