AD7869 View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'AD7869' PDF : 16 Pages View PDF
AD7869
C5
10µF
V+
C6
0.1µF
V+
IN
OUT
IC5
78L05
GND
5V
C2
0.1µF
C1
10µF
ANALOG INPUT
±3V RANGE
SKT1
LK1
A
B
C
COMPONENT
GRID
+ AD711
IC2
V–
C7
10µF
C8
0.1µF
SKT2
ANALOG OUTPUT
±3V RANGE
COMPONENT
GRID
LK2
A
C
B
V+
B
A
C
LK3
C10
0.1µF
C9
10µF
AD711 +
IC3
V–
IC4
ADG201HS
R1
2kΩ
VDD VDD
VIN
RO ADC
RI DAC
RO DAC
IC1
AD7869
CONTROL
AGND
R7
200
A
B
C
C24
0.1µF
LK4
– 5V
A
B
LK5
C
AGND
DGND
DGND
5V
R3
4.7k Ω
DR
R4
R5
2kΩ 4.7k Ω
RCLK
VOUT
RFS
C23
10µF
IC7 1/2
74HC4050
LK8
R6
15k
C22
68pF
C12
0.1µF
C21
330pF
C11
10µF
R2
2kΩ
5V
VCC
Q
REXT/CEXT
CEXT
IC8 1/2
74HC221
A
B
CLR
GND
5V
A BC
LK6
TFS
TCLK
DT
CLK
LDAC
CONVST
VSS VSS
C4
0.1µF
– 5V
OUT
V–
IN
C3
10µF
IC6
79L05
GND
B
A
C
– 5V LK7
SKT6
9-WAY D-TYPE
CONNECTOR
5V
DR
RCLK
RFS
LK9
TFS
TCLK
DT
DGND
SKT3
LDAC
SKT4
CONVST
SKT5
EXT CLK
Figure 19. Input/Output Circuit Based on the AD7869
LK5, ADC Internal Clock Selection
This link configures the ADC for continuous or noncontinuous
internal clock operation.
LK6, DAC Updating
The DAC, LDAC input may asserted independently of the
ADC CONVST signal or it may be tied to CONVST or it may
tied to GND.
LK7, ADC Clock Source
This link provides the option for the ADC to use its own inter-
nal clock oscillator or an external TTL compatible clock.
LK8 Frame Synchronous Option
LK8 provides the option of tying the ADC RFS output to the
DAC TFS input.
LK9 Transmit/Receive Clock Option
LK9 provides the option to connect the ADC RCLK to the
DAC TCLK.
1
2
3
4
5
6
7
8
9
NC = NO CONNECT
Figure 20. SKT6, D-Type Connector Pinout
REV. A
–13–
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