View lt1274 datasheet:

LTC1274/LTC1277 12-Bit, 10mW, 100ksps ADCs with 1µA Shutdown DESCRIPTIO FEATURES Low Power Dissipation: 10mW The LTC®1274/LTC1277 are 8µs sampling 12-bit A/D Sample Rate: 100ksps converters which draw only 2mA (typ) from single 5V or Samples Inputs Beyond Nyquist, 72dB S/(N + D) ±5V supplies. These easy-to-use devices come complete and 82dB THD at fIN = 100kHz with a 2µs sample-and-hold, a precision reference and an Single Supply 5V or ±5V Operation internally trimmed clock. Unipolar and bipolar conversion Power Shutdown to 1µA in Sleep Mode modes add to the flexibility of the ADCs. 180µA Nap Mode (LTC1277) with Instant Wake-Up Two power-down modes are available in the LTC1277. In Internal Reference Can Be Overdriven Nap mode, the LTC1277 draws only 180µA and the instant Int