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AD7741YR

更新时间： 2024-11-08 22:36:59
品牌 Logo 应用领域
亚德诺 - ADI 转换器
页数 文件大小 规格书
12页 134K
描述
Single and Multichannel, Synchronous Voltage-to-Frequency Converters

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AD7741YR 数据手册

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Single and Multichannel, Synchronous  
Voltage-to-Frequency Converters  
a
AD7741/AD7742  
FEATURES  
FUNCTIONAL BLOCK DIAGRAMS  
AD7741: One Single-Ended Input Channel  
AD7742: Two Differential or Three Pseudo-Differential  
Input Channels  
Integral Nonlinearity of 0.012% at fOUT(Max) = 2.75 MHz  
(AD7742) and at fOUT(Max) = 1.35 MHz (AD7741)  
Single +5 V Supply Operation  
Buffered Inputs  
Programmable Gain Analog Front-End  
On-Chip +2.5 V Reference  
V
DD  
REFIN/OUT  
PD  
+2.5V  
REFERENCE  
POWER-DOWN  
LOGIC  
VOLTAGE-TO-  
FREQUENCY  
MODULATOR  
f
V
X1  
OUT  
IN  
Internal/External Reference Option  
Power Down to 35 ␮A Max  
AD7741  
CLOCK  
GENERATION  
Minimal External Components Required  
8-Lead and 16-Lead DIP and SOIC Packages  
CLKIN CLKOUT  
GND  
APPLICATIONS  
Low Cost Analog-to-Digital Conversion  
Signal Isolation  
V
DD  
UNI/BIP  
PD  
GAIN  
AD7742  
POWER-DOWN  
LOGIC  
V
V
V
V
1
2
3
4
IN  
IN  
IN  
IN  
VOLTAGE-TO-  
FREQUENCY  
MODULATOR  
INPUT  
MUX  
f
X1/X2  
OUT  
GENERAL DESCRIPTION  
+2.5V  
REFERENCE  
CLOCK  
GENERATION  
A1  
A0  
The AD7741/AD7742 are a new generation of synchronous  
voltage-to-frequency converters (VFCs). The AD7741 is a  
single-channel version in an 8-lead package (SOIC/DIP) and the  
AD7742 is a multichannel version in a 16-lead package (SOIC/  
DIP). No user trimming is required to achieve the specified  
performance.  
GND  
CLKIN CLKOUT REFIN  
REFOUT  
The AD7741 has a single buffered input whereas the AD7742  
has four buffered inputs that may be configured as two fully-  
differential inputs or three pseudo-differential inputs. Both parts  
include an on-chip +2.5 V bandgap reference that provides the  
user with the option of using this internal reference or an exter-  
nal reference.  
The AD7741 has a single-ended voltage input range from 0 V  
to REFIN. The AD7742 has a differential voltage input range  
from –VREF to +VREF. Both parts operate from a single +5 V  
supply consuming typically 6 mA, and also contain a power-  
down feature that reduces the current consumption to less than  
35 µA.  
REV. 0  
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.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781/329-4700  
Fax: 781/326-8703  
World Wide Web Site: http://www.analog.com  
© Analog Devices, Inc., 1999  
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AD7741YR 替代型号

型号 品牌 替代类型 描述 数据表
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