Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters

The MAX1067/MAX1068 low-power, multichannel, 14-bit analog-to-digital converters (ADCs) feature a successive-approximation ADC, integrated +4.096V reference, a reference buffer, an internal oscillator, automatic power-down, and a high-speed SPI™/QSPI™/MICROWIRE™-compatible interface. The MAX1067/MAX1068 operate with a single +5V analog supply and feature a separate digital supply, allowing direct interfacing with +2.7V to +5.5V digital logic.

The MAX1067/MAX1068 consume only 3.6mA (AVDD = DVDD = +5V) at 200ksps when using an external reference. AutoShutdown™ reduces the supply current to 185µA at 10ksps and to less than 10µA at reduced sampling rates.

The MAX1067 includes a 4-channel input multiplexer, and the MAX1068 accepts up to eight analog inputs. In addition, digital signal processor (DSP)-initiated conversions are simplified with the DSP frame-sync input and output featured in the MAX1068. The MAX1068 includes a data-bit transfer input to select between 8-bit-wide or 16-bit-wide data-transfer modes. Both devices feature a scan mode that converts each channel sequentially or one channel continuously.

Excellent dynamic performance and low power, combined with ease of use and an integrated reference, make the MAX1067/MAX1068 ideal for control and data-acquisition operations or for other applications with demanding power consumption and space requirements. The MAX1067 is available in a 16-pin QSOP package, and the MAX1068 is available in a 24-pin QSOP package. Both devices are guaranteed over the commercial (0°C to +70°C) and extended (-40°C to +85°C) temperature ranges. Use the MAX1168 evaluation kit to evaluate the MAX1068.

Applications

* Accelerometer Measurements * Data Acquisition Systems * Industrial I/O Modules * Industrial Process Controls * Motor Control * Thermocouple Measurements

* 14-Bit Resolution, ±0.5 LSB INL and ±1 LSB DNL (max)

* +5V Single-Supply Operation

* Adjustable Logic Level (+2.7V to +5.25V)

* Input Voltage Range: 0 to VREF

* Internal (+4.096V) or External (+3.8V to AVDD) Reference

* Internal Track/Hold, 4MHz Input Bandwidth

* Internal or External Clock

* SPI/QSPI/MICROWIRE-Compatible Serial Interface, MAX1068 Performs DSP-Initiated Conversions

* 8-Bit-Wide or 16-Bit-Wide Data-Transfer Mode (MAX1068 Only)

* 4-Channel (MAX1067) or 8-Channel (MAX1068) Input Mux

* Scan Mode Sequentially Converts Multiple Channels or One Channel Continuously

* Low Power

* 3.6mA at 200ksps

* 1.85mA at 100ksps

* 185µA at 10ksps

* 0.6µA in Full Power-Down Mode

* Small Package Size

* 16-Pin QSOP (MAX1067)

* 24-Pin QSOP (MAX1068)