参数资料
型号: AD7868ARZ
厂商: Analog Devices Inc
文件页数: 6/16页
文件大小: 0K
描述: IC I/O PORT 12BIT ANLG 28-SOIC
产品变化通告: AD7868 Discontinuation 05/Sept/2011
标准包装: 1
应用: 模拟 I/O
接口: TTL/CMOS
电源电压: 4.75 V ~ 5.25 V
封装/外壳: 28-SOIC(0.295",7.50mm 宽)
供应商设备封装: 28-SOIC W
包装: 管件
安装类型: 表面贴装
AD7868
–14–
REV. B
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.
COMPONENT LIST
IC1
AD7868
IC2, IC3
2X AD711
IC4,
ADG201HS
IC5,
MC78L05
IC6,
MC79L05
IC7,
74HC4050
IC8,
74HC221
C1, C3, C5, C7
C9, C11, C13, C15
10
F Capacitor
C17, C19, C23
C2, C4, C6, C8
C10, C12, C14, C16
0.1
F Capacitor
C18, C20, C24
C21
330 pF Capacitor
C22
68 pF Capacitor
R1, R2, R4
2 k
Resistor
R3, R5
4.7 k
Resistor
R6
15 k
Resistor
R7
200
Resistor
LK1, LK2, LK3,
LK4, LK5, LK6,
LK7, LK8
Shorting Plugs
LK9
SKT1, SKT2, SKT3,
SKT4, SKT5
BNC Sockets
SKT6
9-Contact D-Type Connector
Figure 21. Silkscreen for the Circuit Diagram of Figure 19
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