1.5V to 3.6V, 312.5ksps, 1-Channel True-Differential/2-Channel Single-Ended, 12-Bit, SAR ADCs

The MAX1393/MAX1396 micropower, serial-output, 12-bit, analog-to-digital converters (ADCs) operate with a single power supply from +1.5V to +3.6V. These ADCs feature automatic shutdown, fast wake-up, and a highspeed 3-wire interface. Power consumption is only 0.734mW (VDD = +1.5V) at the maximum conversion rate of 312.5ksps. AutoShutdown™ between conversions reduces power consumption at slower throughput rates.

The MAX1393/MAX1396 require an external reference VREF that has a wide range from 0.6V to VDD. The MAX1393 provides one true-differential analog input that accepts signals ranging from 0 to VREF (unipolar mode) or ±VREF/2 (bipolar mode). The MAX1396 provides two single-ended inputs that accept signals ranging from 0 to VREF. Analog conversion results are available through a 5MHz 3-wire SPI™-/QSPI™-/MICROWIRE™-/digital signal processor (DSP)-compatible serial interface. Excellent dynamic performance, low voltage, low power, ease of use, and small package sizes make these converters ideal for portable battery-powered data-acquisition applications, and for other applications that demand low power consumption and minimal space.

The MAX1393/MAX1396 are available in a space-saving (3mm x 3mm) 10-pin TDFN package. The parts operate over the extended (-40°C to +85°C) temperature range.

Applications

* Battery-Powered Instruments * Data Acquisition * Medical Instruments * Portable Datalogging * Process Control

* 312.5ksps, 12-Bit Successive-Approximation Register (SAR) ADCs

* Single True-Differential Analog Input Channel with Unipolar-/Bipolar-Select Input (MAX1393)

* Dual Single-Ended Input Channel with Channel-Select Input (MAX1396)

* ±1 LSB INL, ±1 LSB DNL, No Missing Codes

* ±2 LSB Total Unadjusted Error (TUE)

* 70dB SINAD at 75kHz Input Frequency

* External Reference (0.6V to VDD)

* Single-Supply Voltage (+1.5V to +3.6V)

* 0.915mW at 300ksps, 1.8V

* 0.305mW at 100ksps, 1.8V

* 3.1µW at 1ksps, 1.8V

* < 1µA Shutdown Current

* AutoShutdown Between Conversions

* SPI-/QSPI-/MICROWIRE-/DSP-Compatible, 3- or 4-Wire Serial Interface

* Small (3mm x 3mm) 10-Pin TDFN Package