The full-scale analog input range is determined by the internal reference of +2.048V (MAX1117) or +4.096V (MAX1119), or by an externally applied reference ranging from +1V to VDD (MAX1118). All devices feature an automatic shutdown mode that reduces supply current to <1A when the device is not in use. The 3-wire serial interface directly connects to SPITM, QSPITM, and MICROWIRETM devices without external logic. Conversions up to 100ksps are performed using an internal clock.