MAX1117

19-1857; Rev 0; 11/00 Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs General Description The MAX1117/MAX1118/MAX1119 low-power, 8-bit, dual-channel, analog-to-digital converters (ADCs) feature an internal track/hold (T/H) voltage reference (MAX1117/MAX1119), clock, and serial interface. The MAX1118 is specified from +2.7V to +5.5V and consumes only 135µA at 100ksps. The MAX1117 is specified from +2.7V to +3.6V, and the MAX1119 is specified from +4.5V to +5.5V, each consumes only 175µA at 100ksps. 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 <1µA when the device is not in use. The 3-wire serial interface directly connects to SPI™, QSPI™, and MICROWIRE™ devices without external logic. Conversions up to 100ksps are performed using an internal clock. The MAX1117/MAX1118/MAX1119 are available in an 8-pin SOT23 package with a footprint that is only 11% of an 8-pin plastic DIP. o Single Supply +2.7V to +3.6V (MAX1117) +2.7V to +5.5V (MAX1118) +4.5V to +5.5V (MAX1119) o Internal Track/Hold: 100kHz Sampling Rate o Internal Reference +2.048V (MAX1117) +4.096V (MAX1119) o Reference Input Range: 0 to VDD (MAX1118) o SPI/QSPI/MICROWIRE-Compatible Serial Interface o Small 8-Pin SOT23 Package o Automatic Power-Down o Analog Input Range: 0 to VREF o Low Power 175µ...