THS1040

SLAS290C − OCTOBER 2001 − REVISED OCTOBER 2004

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PRINCIPLES OF OPERATION

power management

In power-sensitive applications (such as battery-powered systems) where the THS1040 is not required to

convert continuously, power can be saved between conversion intervals by placing the THS1040 into

power-down mode. This is achieved by pulling the STBY pin high. In power-down mode, the device typically

consumes less than 0.1 mW of power.

saving approximately 1.2 mA of supply current.

BIASREF buffer down, saving approximately 1.2 mA.

digital I/O

While the OE pin is held low, ADC conversion results are output at pins D0 (LSB) to D9 (MSB). The ADC input

over-range indicator is output at pin OVR. OVR is also disabled when OE is held high.

The only ADC output data format supported is unsigned binary (output codes 0 to 1023). Twos complement

output (output codes −512 to 511) can be obtained by using an external inverter to invert the D9 output.