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MC68HC16 Interface to Serial EEPROM
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Switching a MC68HC16 I/O pin from an output to an input creates a 1 microsecond pulse on the I/O pin. This prevents a simple two wire interface from the HC16 to a serial EEPROM. Three I/O pins and a transistor are required for this interface.
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AD620 with Digitally Selectable Gain
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An analog switch can be used to select the gain of an AD620 instrumentation amplifier. The analog switch may be a source of noise that is coupled to the gain set terminals. To reject this noise, the gain set resistance must be symmetric about the gain switch.
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Fault Tolerant Multiplexer ESD Protection
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To insure compliance with ESD test standards, add a protection device, such as a transzorb, to all fault tolerant multiplexer inputs that connect to external signals.
Without transzorbs, the device will fail at less than 5KV.
With transzorbs, the devie will survive at least 20KV.
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Make Your Development Process More Efficient
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"Have a preliminary meeting with a UL engineer early in the development of
a product to minimize your effort when you submit the product for UL
approval."
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