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.
Key Features
Applications/Uses
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
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