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參數(shù)資料
| 型號(hào)： | AD654 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Low Cost Monolithic Voltage-to-Frequency Converter(低成本單片電壓-頻率轉(zhuǎn)換器) |
| 中文描述： | 低成本單片電壓頻率轉(zhuǎn)換器（低成本單片電壓-頻率轉(zhuǎn)換器） |
| 文件頁(yè)數(shù)： | 1/8頁(yè) |
| 文件大小： | 307K |
| 代理商： | AD654 |
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
Low Cost Monolithic
Voltage-to-Frequency Converter
AD654
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
FEATURES
Low Cost
Single or Dual Supply, 5 V to 36 V,
6
5 V to
6
18 V
Full-Scale Frequency Up to 500 kHz
Minimum Number of External Components Needed
Versatile Input Amplifier
Positive or Negative Voltage Modes
Negative Current Mode
High Input Impedance, Low Drift
Low Power: 2.0 mA Quiescent Current
Low Offset: 1 mV
PRODUCT DESCRIPTION
The AD654 is a monolithic V/F converter consisting of an input
amplifier, a precision oscillator system, and a high current out-
put stage. A single RC network is all that is required to set up
any full scale (FS) frequency up to 500 kHz and any FS input
voltage up to
±
30 V. Linearity error is only 0.03% for a 250 kHz
FS, and operation is guaranteed over an 80 dB dynamic range.
The overall temperature coefficient (excluding the effects of ex-
ternal components) is typically
±
50 ppm/
°
C. The AD654 oper-
ates from a single supply of 5 V to 36 V and consumes only
2.0 mA quiescent current.
The low drift (4
μ
V/
°
C typ) input amplifier allows operation
directly from small signals such as thermocouples or strain
gauges while offering a high (250 M
) input resistance. Unlike
most V/F converters, the AD654 provides a square-wave output,
and can drive up to 12 TTL loads, optocouplers, long cables, or
similar loads.
PRODUCT HIGHLIGHTS
1. Packaged in both an 8-pin mini-DIP and an 8-pin SOIC
package, the AD654 is a complete V/F converter requiring
only an RC timing network to set the desired full-scale fre-
quency and a selectable pullup resistor for the open-collector
output stage. Any full scale input voltage range from 100 mV
to 10 volts (or greater, depending on +V
S
) can be accommo-
dated by proper selection of the timing resistor. The full-
scale frequency is then set by the timing capacitor from the
simple relationship, f = V/10 RC.
2. A minimum number of low cost external components are
necessary. A single RC network is all that is required to set
up any full scale frequency up to 500 kHz and any full-scale
input voltage up to
±
30 V.
3. Plastic packaging allows low cost implementation of the stan-
dard VFC applications: A/D conversion, isolated signal
transmission, F/V conversion, phase-locked loops, and tun-
ing switched-capacitor filters.
4. Power supply requirements are minimal; only 2.0 mA of qui-
escent current is drawn from the single positive supply from
4.5 volts to 36 volts. In this mode, positive inputs can vary
from 0 volts (ground) to (+V
S
–4) volts. Negative inputs can
easily be connected for below ground operation.
5. The versatile open-collector output stage can sink more than
10 mA with a saturation voltage less than 0.4 volts. The
Logic Common terminal can be connected to any level be-
tween ground (or –V
S
) and 4 volts below +V
S
. This allows
easy direct interface to any logic family with either positive or
negative logic levels.
FUNCTIONAL BLOCK DIAGRAM
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD654JCHIPS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-to-Frequency Converter |
| AD654JN | 功能描述:IC V-F CONVERTER MONO 8-DIP RoHS:否 類別:集成電路 (IC) >> PMIC - V/F 和 F/V 轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:頻率至電壓 頻率 - 最大:10kHz 全量程:- 線性:±0.3% 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SOIC 包裝:Digi-Reel® 其它名稱:LM2917MX-8/NOPBDKR |
| AD654JN/+ | 制造商:Rochester Electronics LLC 功能描述:IC - LOW COST V/F CONV. - Bulk |
| AD654JNZ | 功能描述:IC V-F CONVERTER MONO 8-DIP RoHS:是 類別:集成電路 (IC) >> PMIC - V/F 和 F/V 轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:頻率至電壓 頻率 - 最大:10kHz 全量程:- 線性:±0.3% 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SOIC 包裝:Digi-Reel® 其它名稱:LM2917MX-8/NOPBDKR |
| AD654JNZ/+ | 功能描述:IC CONV VOLT-FREQ 500KHZ 8DIP RoHS:是 類別:集成電路 (IC) >> PMIC - V/F 和 F/V 轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:頻率至電壓 頻率 - 最大:10kHz 全量程:- 線性:±0.3% 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SOIC 包裝:Digi-Reel® 其它名稱:LM2917MX-8/NOPBDKR |
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