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| MC68HC05PV8 Datasheet, PDF (99/196 Pages) Freescale Semiconductor, Inc – Techinal Data - rev 1.9 | |||
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Freescale Semiconductor, Inc.
Input/Output Ports
Port A
NOTE: Pull-up resistors on PA4â6 should be disabled when using the
operational amplifier.
PA6
+
PA5
â
IOCFG Bit6
PA4
Figure 7-4 Operational Amplifier
M
Shunt
Resistor
PA6
Vin
+
PA5
â
Vout PA4
VSS
again=
R2 + R1
R1
to A/D
Figure 7-5 Typical application: positive Vgain amplifier
⢠Keep Vin limited between VSS and VDD
⢠For precise measurements, R1 + R2 should be in the range of
50k⦠and the Vout should not reach VDD
⢠External loads should be connected to ground, due to small
current sinking capability.
⢠In case of Vin x αgain >= VDD (i.e. the output of the operational
amplifier cannot follow the input anymore) channel 6 (input)
should be converted to read the input voltage Vin directly.
MC68HC(8)05PV8/A â Rev. 1.9
Input/Output Ports
For More Information On This Product,
Go to: www.freescale.com
Technical Data
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