ad7868bq Analog Devices, Inc., ad7868bq Datasheet - Page 14

• Manufacturer Part Number: ad7868bq
• Description: Lc2mos Complete, 12-bit Analog I/o System
• Manufacturer: Analog Devices, Inc.

AD7868
LK4, DAC Reference Selection
The DAC reference may be connected to either the ADC refer-
ence output (RO ADC) or to the DAC reference (RO DAC).
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.
Figure 21. Silkscreen for the Circuit Diagram of Figure 19
–14–
COMPONENT LIST
IC1
IC2, IC3
IC4,
IC5,
IC6,
IC7,
IC8,
C1, C3, C5, C7
C9, C11, C13, C15
C17, C19, C23
C2, C4, C6, C8
C10, C12, C14, C16
C18, C20, C24
C21
C22
R1, R2, R4
R3, R5
R6
R7
LK1, LK2, LK3,
LK4, LK5, LK6,
LK7, LK8
LK9
SKT1, SKT2, SKT3,
SKT4, SKT5
SKT6
AD7868
2X AD711
ADG201HS
MC78L05
MC79L05
74HC4050
74HC221
10 F Capacitor
0.1 F Capacitor
330 pF Capacitor
68 pF Capacitor
2 k Resistor
4.7 k Resistor
15 k Resistor
200
Shorting Plugs
BNC Sockets
9-Contact D-Type Connector
Resistor
REV. B