LTC1250

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APPLICATI

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Single Supply Operation

The LTC1250 will operate with single supply voltages as

low as 4.5V, and the output swings to within millivolts of

either supply when lightly loaded. The input stage will

common mode to within 250mV of ground with a single

5V supply, and will common mode to ground with single

supplies above 11V. Most bridge transducers bias their

inputs above ground when powered from single supplies,

allowing them to interface directly to the LTC1250 in

single supply applications. Single-ended, ground-refer-

enced signals will need to be level shifted slightly to

interface to the LTC1250’s inputs.

Fault Conditions

The LTC1250 is designed to withstand most external fault

conditions without latch-up or damage. However, unusu-

ally severe fault conditions can destroy the part. All pins

are protected against faults of ±25mA or 5V beyond

either supply, whichever comes first. If the external

circuitry can exceed these limits, series resistors or

voltage clamp diodes should be included to prevent

damage.

The LTC1250 includes internal protection against ESD

damage. All data sheet parameters are maintained to 1kV

ESD on any pin; beyond 1kV, the input bias and offset

currents will increase, but the remaining specs are unaf-

fected and the part remains functional to 5kV at the input

pins and 8kV at the output pin. Extreme ESD conditions

should be guarded against by using standard antistatic

precautions.