SN74HC4852_08 Datasheet, PDF (8/20 Pages) Texas Instruments – DUAL 4-TO-1 CHANNEL ANALOG MULTIPLEXER/DEMULTIPLEXER WITH INJECTION-CURRENT EFFECT CONTROL

SN74HC4852
DUAL 4ĆTOĆ1 CHANNEL ANALOG MULTIPLEXER/DEMULTIPLEXER
WITH INJECTIONĆCURRENT EFFECT CONTROL
SCLS573 − MARCH 2004
APPLICATION INFORMATION
Sensor
(8x Identical
Circuitry)
5V
VCC
HC4052A
Channel 1Y0
Channel 1Y1
Channel 1Y2
Channel 1Y3
1-COM
Channel 2Y0
Channel 2Y1
Channel 2Y2
Channel 2Y3
2-COM
VCC
Microcontroller
A/D − Input 1
A/D − Input 2
Figure 3. Solution by Applying the HC4852 Multiplexer
Disabled Analog Mux Input
VIn > VCC + 0.7 V
P+
Gate = VCC
(Disabled)
+
+
+
Common Analog Output
Vout > VCC
P+
N − Substrate (on VCC potential)
Figure 4. Diagram of Bipolar Coupling Mechanism
(Appears if V_In Exceeds V_CC, Driving Injection Current Into the Substrate)
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