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AD7984 датащи(PDF) 1 Page - Analog Devices

номер детали AD7984
подробное описание детали  Devices Connected
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD7984 датащи(HTML) 1 Page - Analog Devices

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Circuit Note
CN-0269
Circuits from the Lab™ reference circuits are
engineered and testedfor quick and easy system
integration to help solvetoday’sanalog, mixed-signal,
and RF design challenges. For more information
and/or support,visitwww.analog.com/CN0269.
Devices Connected/Referenced
AD7984
18-Bit, 1.33 MSPS PulSAR 10.5 mW ADC in MSOP/QFN
AD8475
Precision, Selectable Gain, Fully Differential Funnel Amp
AD8065
High Performance, 145 MHz FastFET Op Amps
ADG5208 High Voltage, Latch-Up Proof, 8-Channel Multiplexers
ADG5236 High Voltage Latch-Up Proof, Dual SPDT Switches
ADR444
Ultralow Noise, 4.096 V, LDO XFET Voltage References with
Current Sink and Source
18-Bit, 1.33 MSPS, 16-Channel Data Acquisition System
Rev. 0
Circuitsfromthe Lab™circuitsfromAnalog Deviceshave been designedandbuiltbyAnalogDevices
engineers. Standard engineering practices have been employed in the design and construction of
eachcircuit,andtheirfunctionandperformancehavebeentestedandverifiedinalabenvironmentat
room temperature. However, you are solely responsible for testing the circuit and determining its
suitabilityandapplicabilityforyouruseandapplication.Accordingly,innoeventshallAnalogDevices
be liable for direct, indirect, special, incidental, consequential or punitive damages due to any cause
whatsoeverconnectedtotheuseofanyCircuitsfromtheLabcircuits. (Continuedonlastpage)
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2013 Analog Devices, Inc. All rights reserved.
EVALUATION AND DESIGN SUPPORT
Circuit Evaluation Boards
CN-0269 Circuit Evaluation Board (EVAL-CN0269-SDPZ)
System Demonstration Platform (EVAL-SDP-CB1Z)
Design and Integration Files
Schematics, Layout Files, Bill of Materials
CIRCUIT FUNCTION AND BENEFITS
The circuit shown in Figure 1 is a high performance industrial
signal level multichannel data acquisition circuit that has been
optimized for fast channel-to-channel switching. It can process
16-channels of single-ended inputs or 8-channels of differential
inputs with up to 18-bit resolution.
A single channel can be sampled at up to 1.33 MSPS with 18-bit
resolution. A channel-to-channel switching rate of 250 kHz
between all input channels provides 16-bit performance.
The signal processing circuit combined with a simple 4-bit up-
down binary counter provides a simple and cost effective way to
realize channel-to-channel switching without an FPGA, CPLD,
or high speed processor. The counter can be programmed to
count up or count down for sequentially sampling multiple
channels, or can be loaded with a fixed binary word for
sampling a single channel.
Figure 1. Multichannel Data Acquisition Circuit (Simplified Schematic: All Components, Connections, and Decoupling Not Shown)
AI0
AI1
AI2
AI3
AI4
AI5
AI6
AI7
AI8
AI9
AI10
AI11
AI12
AI13
AI14
AI15
SINGLE ENDED
1k
10k
1.25k
1.25k
1.25k
1.25k
–IN_0.8*
+IN_0.8*
+OUT
–OUT
+VS
–VS
–IN_0.4*
+IN_0.4*
VCOM
NC
AD8475
10
10
0.1µF
0.1µF
50V
0.1µF
50V
0.1µF
50V
TP_1
VIN
NC_1
GND
TP_2
NC_2
VOUT
TRIM
ADR444
2.2nF
IN+
IN–
GND
REF
SDI
SCK
SDO
CNV
VDD
VIO
AD7984
VDD
NC_1
D1
NC_3
GND
NC_2
NC_4
VSS
S1A
S1B
IN1
IN2
NC_5
S2B
S2A
D2
ADG5236
1k
1k
1k
1k
AD8065
AD8065
2.2nF
P4
0
33
33
33
33
33
33
15
33
33
33
1
3
2
JP3
1
3
2
JP4
B
A
Y
P1
Q3
P0
P3
Q1
GND
PE
VCC
Q0
CEP
CP
TC
P2
Q2
U/D
CET
74LVC169
CH0 CH1 CH2
CH3
S6
S5
GND
S8
A1
D
A0
S4
S3
S2
S1
VDD
A2
EN
S7
VSS
ADG5208
S_D
VIO
TCLKBF
DATA
TFS
+2.5V
+4.096V
+5V
+12V
–12V
EN
+5V
DGND
AGND
VCOM
+3.3V
P0
P1
P2
P3
PL
U/D
AI0+
+12V
–12V
AI1+
AI2+
AI3+
AI4+
AI5+
AI6+
AI7+
AI0–
AI1–
AI2–
AI3–
AI4–
AI5–
AI6–
AI7–
S6
S5
GND
S8
A1
D
A0
S4
S3
S2
S1
VDD
A2
EN
S7
VSS
ADG5208
+12V
–12V
DIFFERENTIAL
SPORT
GPIO
74LVC1G00
+12V
–12V
+12V
–12V
22µF
6.3V


Аналогичный номер детали - AD7984

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