19-2955; Rev 0; 8/03
Multichannel, 14-Bit, 200ksps Analog-to-Digital
Converters
General Description
Features
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.
o 14-Bit Resolution, ±±0. ꢀLB ꢁIꢀ ꢂnꢃ
±1 ꢀLB ꢄIꢀ ꢅ(ꢂax
o +.V Lingle-Lupply Operꢂtion
o Aꢃjustꢂble ꢀogic ꢀevel ꢅ+207V to +.02.Vx
o ꢁnput Voltꢂge Rꢂnge: ± to V
REF
o ꢁnternꢂl ꢅ+40±96Vx or Eaternꢂl ꢅ+308V to AV
x
ꢄꢄ
Reference
The MAX1067/MAX1068 consume only 2.9mA (AV
=
DD
o ꢁnternꢂl Trꢂck/Holꢃ, 4MHz ꢁnput Bꢂnꢃwiꢃth
o ꢁnternꢂl or Eaternꢂl Clock
DV
= +5V) at 200ksps when using an external refer-
DD
ence. AutoShutdown™ reduces the supply current to
145µA at 10ksps and to less than 10µA at reduced sam-
pling rates.
o LPꢁ/QLPꢁ/MꢁCROWꢁRE-Co(pꢂtible Leriꢂl
ꢁnterfꢂce, MAX1±68 Perfor(s ꢄLP-ꢁnitiꢂteꢃ
Conversions
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.
o 8-Bit-Wiꢃe or 16-Bit-Wiꢃe ꢄꢂtꢂ-Trꢂnsfer Moꢃe
ꢅMAX1±68 Onlyx
o 4-Chꢂnnel ꢅMAX1±67x or 8-Chꢂnnel ꢅMAX1±68x
ꢁnput Mua
Lcꢂn Moꢃe Lequentiꢂlly Converts Multiple
Chꢂnnels or One Chꢂnnel 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.
o ꢀow Power
209(A ꢂt 2±±ksps
104.(A ꢂt 1±±ksps
14.µA ꢂt 1±ksps
±06µA in Full Power-ꢄown Moꢃe
o L(ꢂll Pꢂckꢂge Lize
16-Pin QLOP ꢅMAX1±67x
24-Pin QLOP ꢅMAX1±68x
Ordering Information
Applications
PꢁI-
ꢁIꢀ
PART
TEMP RAIGE
Motor Control
PACKAGE ꢅꢀLBx
Industrial Process Control
Industrial I/O Modules
MAX1±67ACEE
MAX1067BCEE
MAX1067CCEE
MAX1067AEEE
MAX1067BEEE
MAX1067CEEE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
16 QSOP
16 QSOP
16 QSOP
16 QSOP
16 QSOP
16 QSOP
0.5
1
2
Data-Acquisition Systems
Thermocouple Measurements
Accelerometer Measurements
0.5
1
2
Ordering Information continued at end of data sheet.
Pin Configurations appear at end of data sheet.
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.