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AD15700/PCB Datasheet(PDF) 26 Page - Analog Devices

Part # AD15700/PCB
Description  1 MSPS 16-/14-Bit Analog I/O Port
PDF  44 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD15700/PCB Datasheet(HTML) 26 Page - Analog Devices

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REV. A
–26–
AD15700
CIRCUIT OPERATION
The AD15700 contains precision components for interfacing
analog I/O to a processor. Configuration for particular applications
can be made with short external interconnects under the device.
+IN2
–IN2
RA2
RB2
RC2
INA
INB
INC
IND
INGND
REF
REFGND
VREF
VDD_DAC
DGND_DAC
AGND_DAC
VOUT_DAC
RA1
RB1
RC1
+IN1
–IN1
VOUT2
+VS2
–VS2
RPAD2
SCLK
SDOUT
BUSY
CNVST
OB/
2C
SER/
PAR
WARP
RDC/SIN
INVSCLK
INVSYNC
EXT/
INT
DIVSCLK1
DIVSCLK0
IMPULSE
CS_ADC
RD
BYTESWAP
RESET
PD
SCLK
CS_DAC
DIN
RPAD1
VOUT1
+VS1
–VS1
STATE MACHINE
DSP/ P
OP AMP
RESISTOR
DAC
ADC
OP-AMP
RESISTOR
TCLK
AD15700
ANALOG INPUT
(0.2V TO 2REF)
ANALOG OUTPUT
(0.2V TO 2REF)
+VS
+VS
DVDD
OVDD
OGND
DGND_ADC
DVDD
AVDD
AGND_ADC
DIGITAL SUPPLY
(3.3V OR 5V)
ANALOG
SUPPLY (5V)
C2
NOTE 2
0.1 F
0.1 F
0.1 F
47 F
C1
NOTE 1
DGND
AGND
0.1
F
10 F
100
RFS
TFS
RCLK
0.1 F
ADR421 OR
AD780 2.5V OR
3.0V REF
NOTES
1. C1 FORMS AN R-C FILTER WITH THE 6.25k
NOMINAL OUTPUT RESISTANCE OF THE DAC
2. C2 FORMS PART OF THE ADC INPUT FILTER. SEE ANALOG INPUT SECTION.
Figure 4. Typical Connection Diagram
TYPICAL CONNECTION DIAGRAM
Figure 4 shows how, using a minimum of external devices, the com-
ponents within the AD15700 can be interconnected to form a
complete analog interface to a processor. The circuit implements signal
conditioning that includes buffering, filtering, and voltage scaling.



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