LM331A

更新时间： 2024-11-06 22:51:55

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
16页	281K
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Precision Voltage-to-Frequency Converters

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LM331A 数据手册

December 1994

LM131A/LM131, LM231A/LM231, LM331A/LM331

Precision Voltage-to-Frequency Converters

General Description

The LM131/LM231/LM331 family of voltage-to-frequency

converters are ideally suited for use in simple low-cost cir-

cuits for analog-to-digital conversion, precision frequency-

to-voltage conversion, long-term integration, linear frequen-

cy 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 ad-

vantages of the voltage-to-frequency conversion tech-

niques, and is easy to apply in all standard voltage-to-fre-

quency converter applications. Further, the LM131A/

LM231A/LM331A attains a new high level of accuracy ver-

sus temperature which could only be attained with expen-

sive voltage-to-frequency modules. Additionally the LM131

is ideally suited for use in digital systems at low power sup-

ply voltages and can provide low-cost analog-to-digital con-

version in microprocessor-controlled systems. And, the fre-

quency from a battery powered voltage-to-frequency con-

verter can be easily channeled through a simple photoisola-

tor to provide isolation against high common mode levels.

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

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, 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

The LM131/LM231/LM331 utilizes

a new temperature-

compensated band-gap reference circuit, to provide excel-

lent accuracy over the full operating temperature range, at

power supplies as low as 4.0V. The precision timer circuit

Typical Applications

TL/H/5680–1

OUT

2.09 V

R C

t t

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

**0.1mF or 1mF, See ‘‘Principles of Operation.’’

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

with 0.03% Typical Linearity (f

10 Hz to 11 kHz)

1995 National Semiconductor Corporation

TL/H/5680

RRD-B30M115/Printed in U. S. A.

12 3 4 5 6 7...16

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与LM331A相关器件

型号	品牌	获取价格	描述	数据表
LM331AH	NSC	获取价格	暂无描述
LM331AN	TI	获取价格	LM231A/LM231/LM331A/LM331 Precision Voltage-to-Frequency Converters
LM331AN	NSC	获取价格	Precision Voltage-to-Frequency Converters
LM331AN/A+	ETC	获取价格	Voltage-to-Frequency Converter
LM331AN/B+	ETC	获取价格	Voltage-to-Frequency Converter
LM331AN/NOPB	TI	获取价格	Precision voltage-to-frequency converter with 1-Hz to 100-KHz full scale frequency 8-PDIP
LM331H/A+	ETC	获取价格	Voltage-to-Frequency Converter
LM331MWC	NSC	获取价格	IC VOLTAGE-FREQUENCY CONVERTER, 0.1 MHz, UUC, WAFER, Analog Special Function Converter
LM331N	NSC	获取价格	Precision Voltage-to-Frequency Converters
LM331N	TI	获取价格	LM231A/LM231/LM331A/LM331 Precision Voltage-to-Frequency Converters

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