* 8-Channel Single-Ended or 4-Channel Differential Inputs * Single-Supply Operation * +2.7V to +3.6V (MAX146) * +2.7V to +5.25V (MAX147) * Internal 2.5V Reference (MAX146) * Low Power * 1.2mA (133ksps, 3V supply) * 54µA (1ksps, 3V supply) * 1µA (power-down mode) * SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire Serial Interface * Software-Configurable Unipolar or Bipolar Inputs * 20-Pin DIP/SSOP Packages
The MAX146ACAP+ is a +2.7V, low power, 8-channel, serial 12bit analogue to digital converter (ADC) in 20 pin SSOP package. This 12bit data acquisition system combine an 8-channel multiplexer, high bandwidth track/hold and serial interface with high conversion speed and low power consumption. The analogue inputs are software configurable for unipolar/bipolar and single ended/differential operation. This device use either the internal clock or an external serial interface clock to perform successive approximation analogue to digital conversion and have a reference buffer amplifier with a ±1.5% voltage adjustment range. It provides a hard wired SHDN (complimentary) pin, a software selectable power-down feature which can be programmed to automatically shut down at the end of a conversion. Accessing the serial interface automatically powers up the device and the quick turn-on time allows it to be shut down between all conversions.
The MAX146AEAP+ from Maxim Integrated Products is a +2.7V, low power, 8 channel, serial 12bit ADC in 20 pin SSOP package. This 12bit data acquisition system combines an 8-ch multiplexer, high bandwidth track/hold and serial interface with high conversion speed and low power consumption. It use an internal clock to perform successive approximation A/D conversion and have a reference buffer amplifier with a ±1.5% voltage adjustment range. It provides a hard wired SHDN (complimentary) pin, a software selectable power-down feature which can be programmed to automatically shut down at the end of a conversion. Accessing the serial interface automatically powers up the device and quick turn-on time allows it to be shut down between all conversions, this technique can cut supply current to under 60µA at reduced sampling rates. It is used in portable data logging, medical instruments, pen digitizers, data acquisition, battery powered instruments and process control.