General Description
The MAX1067/MAX1068 low-power, multichannel, 14-
bit analog-to-digital converters (ADCs) feature a suc-
cessive-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 (AV
DD
=
DV
DD
= +5V) at 200ksps when using an external refer-
ence. AutoShutdown™ reduces the supply current to
185µA at 10ksps and to less than 10µA at reduced sam-
pling 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 con-
versions 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, com-
bined 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 require-
ments. 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 evalua-
tion kit to evaluate the MAX1068.
Applications
Motor Control
Industrial Process Control
Industrial I/O Modules
Data-Acquisition Systems
Thermocouple Measurements
Accelerometer Measurements
Features
♦ 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 V
REF
♦ Internal (+4.096V) or External (+3.8V to AV
DD
)
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)
MAX1067/MAX1068
Multichannel, 14-Bit, 200ksps Analog-to-Digital
Converters
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-2955; Rev 1; 8/07
For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
