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AD346 데이터시트 PDF




Analog Devices에서 제조한 전자 부품 AD346은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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부품번호 AD346 기능
기능 High Speed Sample and Hold Amplifier
제조업체 Analog Devices
로고 Analog Devices 로고


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AD346 데이터시트, 핀배열, 회로
ANALOGDEVICES fAX-ON-DEHAND HOTLINE - Page 111
-. ANALOG
W DEVICES
HighSpeed
Sample-and- Hold Amplifier
I AD346 I
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Fast 2.0fLSAcquisition Time to :0.01%
Low Droop Rate: O.5mV/ms
Low Offset
Low Glitch: <40mV
Aperture Jitter: 4OOps
Extended Temperature Range: -55"C to + 125.C
Internal Hold Capacitor
MIL-STD-883BProcessing Available
+vs
8) ~~~t~
S)~~~LOG
OBPRODUCT DESCRIPTION
The AD346 is a high speed (2J.lSto 0.01%), adiustmem free
Ssample-and-hold amplifier designed for high throughput rate
Odata acquisition applications. The fast acquisition time (211s(0
0.01%) and low aperture jitter (400ps) make it suitable for use
Lwith fast AID converters to digitize signals up to 97kHz.
EThe AD346 is complete with an internal hold capacitor and it
incorporates a compensation network which minimizes the sample
Tto hold charge offset. The AD346 is also laser trimmed to eliminate
Ethe need for external trimming potentiometers.
PRODUCT HIGHLIGHTS
1. The AD346 is an improved second source for other sample
and holds of the same pin configuration.
2. The AD346 provides separate analog and digital grounds,
thus improving the device's immunity to ground and switching
transients.
3. The droop rate is only O.SmV/ms so that it may be used in
slower high accuracy systems without the loss of accuracy.
4. The fast acquisition time and low aperture make it suitable
for very high speed data acquisition systems.
Typical applications for the AD346 include sampled data systems,
D/A deglitchers, peak hold functions, strobcd measurement
systems and simultaneous sampling converter systems.
PIN CONFIGURATION
The device is available in tWo versions: the "J" specified for
operation over the 0 to + 700C commercial temperature range
and the "S" specified over the extended temperature range,
- 55°C to + 125°C.
13 I ANAlOG INPUT
ORDERING GUIDE
MocIcl
AD 346JD
AD346SD
AD346SD/883B
*DH-14A = Ceramic DIP.
Temperature
Range
Oto +700C
- 55°to + 125°C
- SSOC'to+ J2S.C
Package
Option.
DH-14A
DH-14A
DH-14A
DlGrrAL OND I .
ANAlOG GND L.!
r7OFFSET AOJ
!J OFFSET AOJ
81 ANALOG OUTPUT
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 licer\$e 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: 617/329-4700
Fax; 6171326-8703
Twx: 710(354-6577
Telex: 924491
Cable: ANALOGNORWOODMASS




AD346 pdf, 반도체, 판매, 대치품
-ANALOGDEVICES fAX-ON-DEMAND HOTLINE
Page 13
AD346
SAMPLED DATA SYSTEMS
The fast acquisition time of the AD346 when used with a high
speed AiD converter allows accurate digitization of high frequency
signals and high throughput rates in multichannel data acqusition
systems. The AD346 can be used with a number of different
AJD converters to achieve high throughput rates. Figures 6, 7
and 8 show the use of an AD346 with the AD578, ADS240 and
AD ADC85.
<15Y
.15V
+6Y
ANALOG
't.lPUT
0 TO 1OV
13
AO3411
6
+16Y
-16Y
+6V
81TS
1-12
AlfAlOG
I,.,UT
OTO1OV
Z7
CONY.RT
START
-'3 AO348 .
Figure 8. 83.3kHz-12-Bit, AID Conversion System
A0578K
~ nCONYERT
START
T
STATUS
O IFigure 6. 153kHz-12-Bit, AID Conversion System
B +1SV
S -16Y
+6Y
O11
L24
E81TS
1-12
TEA0524O
CONVERT
START
STATUS
~'----
T CONy
CONVERSION Of
OCOFNSVAEMRSf'ILOEN2 1 ACQSUAISMITf'ILOEN2 OF fiRST SAMPLE
STATUS CONNECTED TO SAMPLE AND HOLD MODE CONTROL
Figure 9. Start/Status Timing for Sampled Data System
CLEANLINESS, LEAKAGE AND DROOP
Sample-aDd-hold amplifiers usually have one or more internal
nodes which operate with extrcm!='lyhigh impedances in the
hold mode. Parasitic leakage at these nodes can degrade the
part's droop rate, and ac signals coupled in through parasitic
capacitance can introduce noise onto the held output. One such
de leakage path can be produced by the residual oijs left on the
package after it has been handled with bare fingers. Most normal
board cleaning and flux removal procedures will remove these
contaminants. For best results finger cots should be used when
CONVERT
START
or
STATUS
20 21
handling the AD346.
Figure 7. 142.8kHz-72-Bit, AID Conversion System
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
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부품번호상세설명 및 기능제조사
AD346

High Speed Sample and Hold Amplifier

Analog Devices
Analog Devices

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