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參數(shù)資料
| 型號： | LM231N |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 模擬專用變換器 |
| 英文描述： | Precision Voltage-to-Frequency Converters |
| 中文描述： | VOLTAGE-FREQUENCY CONVERTER, 0.1 MHz, PDIP8 |
| 封裝： | MDIP-8 |
| 文件頁數(shù)： | 1/15頁 |
| 文件大?。?/td> | 368K |
| 代理商： | LM231N |
LM231A/LM231/LM331A/LM331
Precision Voltage-to-Frequency Converters
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
low-cost
analog-to-digital
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
conversion
in
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
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
Typical Applications
Teflon
is a registered trademark of DuPont
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)
June 1999
L
1999 National Semiconductor Corporation
DS005680
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM231N/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-to-Frequency Converter |
| LM231N/NOPB | 功能描述:電壓頻率轉(zhuǎn)換及頻率電壓轉(zhuǎn)換 PREC VLTG-TO-FREQ CONVERTER RoHS:否 制造商:Texas Instruments 全標(biāo)度頻率:4000 KHz 線性誤差:+/- 1 % FSR 電源電壓-最大: 電源電壓-最小: 最大工作溫度:+ 85 C 最小工作溫度:- 25 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-14 封裝:Tube |
| LM231N/NOPB | 制造商:Texas Instruments 功能描述:Voltage / Frequency (V/F & F/V) Converte |
| LM231WM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Precision Voltage-to-Frequency Converters |
| LM2320-7 | 功能描述:線性和開關(guān)式電源 Euro-Cassette 50W (2x 12V) RoHS:否 制造商:TDK-Lambda 產(chǎn)品:Switching Supplies 開放式框架/封閉式:Enclosed 輸出功率額定值:800 W 輸入電壓:85 VAC to 265 VAC 輸出端數(shù)量:1 輸出電壓（通道 1）:20 V 輸出電流（通道 1）:40 A 商用/醫(yī)用: 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:Rack 長度: 寬度: 高度: |
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