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參數(shù)資料
| 型號(hào)： | AD7742 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Low Cost, Single & Multi-Channel,Voltage-to-Frequency Converters(低成本,多通道,電壓-頻率轉(zhuǎn)換器) |
| 中文描述： | 低成本，單 |
| 文件頁(yè)數(shù)： | 1/9頁(yè) |
| 文件大?。?/td> | 304K |
| 代理商： | AD7742 |
is a single-ended version in a small 8-pin DIP/SOIC package
and the AD7742 is a multi-channel version in a 16-pin DIP/
SOIC package. Small package, low cost, ease of use plus no
user trims required to achieve specified performance were ma-
jor design goals for these products.
The AD7742 contains an internal +2.5 V bandgap reference
and offers two differential inputs or three pseudo-differential
inputs. The AD7742 also allows the user the choice of pin-
programming the channel and gain settings.
The AD7741 accepts a single-ended analog input range from
0 V to +REF IN and the AD7742 accepts differential analog
input ranges from -REF IN to +REF IN. Both parts operate
from a single +5 V supply consuming only 30 mW.
FUNCTIONAL BLOCK DIAGRAMS
Prelim J1 7/98
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
Preliminary Technical Data
FEATURES
Synchronous Operation
Full-Scale Frequency (up to 3MHz) Set by External Sys-
tem Clock
F
OUT
(max) = 45% of F
CLOCK
Low Nonlinearity:0.1% at F
OUT
= 3MHz
Single +5V Supply Operation
Buffered Inputs
AD7741: Single-ended input
AD7742: 3 Pseudo-Differential inputs,
OR 2 Fully Differential inputs
Programmable Gain Front End
Selectable via Gain Select pin
On-chip +2.5V Reference Voltage (AD7742)
Internal/External Reference Option (AD7742)
No user trims required to achieve specified performance
Low Cost
Input Signal Ranges:
AD7741:
0V to +REF IN
AD7742:
Unipolar: 0V to +REF IN/Gain
Bipolar: -REF IN/Gain to +REF IN/Gain
Minimum Number of External Components required
AD7741: 8-Pin DIP, 8-Lead 0.15" wide SOIC packages
AD7742: 16-Pin DIP, 16-Lead 0.15" wide SOIC packages
APPLICATIONS
Low Cost A/D Conversion
Common-Mode Voltage Isolation
GENERAL DESCRIPTION
The AD7741 and AD7742 are a new generation of synchro-
nous Voltage-to-Frequency Converters (VFC's). The AD7741
Analog Devices, Inc., 1998
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, USA
http://www.analog.com
Tel: 781/329-4700
Fax: 781/326-8703
Low Cost, Single & Multi-Channel,
Voltage-to-Frequency Converters
AD7741/42
PRODUCT HIGHLIGHTS
1. The AD7741 is a single channel, single-ended VFC. It is
available in an 8-pin DIP and in an 0.15" wide 8-lead SOIC
package.
2. The AD7742 is a multi-channel VFC whose internal set-
tings (PGA & Channel Select) can be pin selected by tying
certain package pins high or low. It is available in a 16-pin
DIP and in an 0.15" wide 16-lead SOIC package.
3. Low Power, Single Supply Operation
The AD7741 and AD7742 operate from a single +5 V sup-
ply and consume only 30 mW.
VOLTAGE TO
FREQUENCY
CONVERTER
CLOCK
GENERATION
VIN
AD7741
VD D
REF IN
FOUT
CLK IN
CLK OUT
GND
INPUT
MUX
PGA
IN(-)
IN(+)
VOLTAGE TO
FREQUENCY
CONVERTER
CLOCK
GENERATION
2.5V BANDGAP
REFERENCE
IN 1
IN 2
IN 3
IN 4
A0
A1
G0
AD7742
VDD
REF IN
REF OUT
FOUT
UNI/BIP
CLK IN
CLK OUT
GND
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7742BN | 制造商:Analog Devices 功能描述:VFC Sync 2.75MHz 16-Pin PDIP 制造商:Rochester Electronics LLC 功能描述:SINGLE + MULTI-CHANNEL VFC I.C. - Bulk |
| AD7742BNZ | 制造商:Analog Devices 功能描述:VFC Sync 2.75MHz 16-Pin PDIP |
| AD7742BR | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Single and Multichannel, Synchronous Voltage-to-Frequency Converters |
| AD7742BR-REEL | 制造商:Analog Devices 功能描述: |
| AD7742YR | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Single and Multichannel, Synchronous Voltage-to-Frequency Converters |
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