LM231

更新时间： 2024-09-14 22:47:07

品牌	Logo	应用领域
美国国家半导体 - NSC		转换器
页数	文件大小	规格书
15页	371K
描述
Precision Voltage-to-Frequency Converters

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LM231 数据手册

June 1999

LM231A/LM231/LM331A/LM331

Precision Voltage-to-Frequency Converters

over the full operating temperature range, at power supplies

as low as 4.0V. The precision timer circuit has low bias cur-

rents 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

General Description

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 modula-

tion 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 in-

put 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 appli-

cations. Further, the LM231A/LM331A attain a new high

level of accuracy versus temperature which could only be at-

tained with expensive voltage-to-frequency modules. Addi-

tionally the LM231/331 are ideally suited for use in digital

systems at low power supply voltages and can provide

up to 40V, yet is short-circuit-proof against V_CC

Features

n Guaranteed linearity 0.01% max

n Improved performance in existing voltage-to-frequency

conversion applications

n Split or single supply operation

n Operates on single 5V supply

n Pulse output compatible with all logic forms

n Excellent temperature stability, 50 ppm/˚C max

n Low power dissipation, 15 mW typical at 5V

n Wide dynamic range, 100 dB min at 10 kHz full scale

frequency

n Wide range of full scale frequency, 1 Hz to 100 kHz

n Low cost

low-cost

analog-to-digital

conversion

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

Typical Applications

DS005680-1

Use stable components with low temperature coefficients. See Typical Applications section.

0.1µF or 1µF, See “Principles of Operation.”

FIGURE 1. Simple Stand-Alone Voltage-to-Frequency Converter

with 0.03% Typical Linearity (f 10 Hz to 11 kHz)

Teflon^®is a registered trademark of DuPont

DS005680

www.national.com

12 3 4 5 6 7...15

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型号	品牌	获取价格	描述	数据表
LM2316SLBX	TI	获取价格	PLL FREQUENCY SYNTHESIZER, 1200MHz, CQCC16, CSP-16
LM231A	NSC	获取价格	Precision Voltage-to-Frequency Converters
LM231AN	NSC	获取价格	Precision Voltage-to-Frequency Converters
LM231AN	TI	获取价格	LM231A/LM231/LM331A/LM331 Precision Voltage-to-Frequency Converters
LM231AN/A+	ETC	获取价格	Voltage-to-Frequency Converter
LM231AN/B+	TI	获取价格	IC,VOLTAGE-TO-FREQUENCY CONVERTER,BIPOLAR/JFET,DIP,8PIN
LM231AN/NOPB	TI	获取价格	具有 1Hz 至 100KHz 满量程频率的精密压频转换器（宽工作温度） \| P \| 8
LM231B	SAMSUNG	获取价格	2323 Middle Power LED
LM231H	NSC	获取价格	IC VOLTAGE-FREQUENCY CONVERTER, 0.1 MHz, MBCY8, Analog Special Function Converter
LM231N	TI	获取价格	LM231A/LM231/LM331A/LM331 Precision Voltage-to-Frequency Converters

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