19-2854; Rev 1; 7/03
10-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
General Description
Features
The MAX1027/MAX1029/MAX1031 are serial 10-bit ana-
log-to-digital converters (ADCs) with an internal reference
and an internal temperature sensor. These devices fea-
ture on-chip FIFO, scan mode, internal clock mode, inter-
nal averaging, and AutoShutdown™. The maximum
sampling rate is 300ksps using an external clock. The
MAX1031 has 16 input channels, the MAX1029 has 12
input channels, and the MAX1027 has 8 input channels.
All input channels are configurable for single-ended or
differential inputs in unipolar or bipolar mode. All three
devices operate from a +5V supply and contain a 10MHz
SPI™/QSPI™/MICROWIRE™-compatible serial port.
ꢀ Internal Temperature Sensor ( 1°C Accuracy)
ꢀ 16-Entry First-In/First-Out (FIFO)
ꢀ Analog Multiplexer with True Differential
Track/Hold
16-, 12-, 8-Channel Single Ended
8-, 6-, 4-Channel True Differential
(Unipolar or Bipolar)
ꢀ Accuracy: 1 LSB INL, 1 LSB DNL, No Missing
Codes Over Temperature
ꢀ Scan Mode, Internal Averaging, and Internal Clock
The MAX1031 is available in 28-pin 5mm x 5mm QFN
with exposed pad and 24-pin QSOP packages. The
MAX1027/MAX1029 are only available in QSOP pack-
ages. All three devices are specified over the extended
-40°C to +85°C temperature range.
ꢀ Low-Power Single +3V Operation
1mA at 300ksps
ꢀ Internal 2.5V Reference or External Differential
Reference
ꢀ 10MHz 3-Wire SPI/QSPI/MICROWIRE-Compatible
Interface
________________________Applications
System Supervision
Data-Acquisition Systems
Industrial Control Systems
Patient Monitoring
Data Logging
ꢀ Space-Saving 28-Pin 5mm x 5mm QFN Package
Ordering Information
PART
TEMP RANGE
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
16 QSOP
MAX1027ACEE-T*
MAX1027AEEE-T*
Instrumentation
16 QSOP
*Future product—contact factory for availability.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
SPI/QSPI are trademarks of Motorola, Inc.
Ordering Information continued at end of data sheet.
MICROWIRE is a trademark of National Semiconductor Corp.
Pin Configurations
TOP VIEW
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AIN8
1
2
3
4
5
6
7
8
9
20 EOC
19 DOUT
18 DIN
17 CS
AIN0
1
2
3
4
5
6
7
8
16 EOC
15 DOUT
14 DIN
13 CS
AIN1
AIN2
MAX1029
16 SCLK
AIN3
MAX1027
15
14
V
DD
AIN4
12 SCLK
GND
AIN5
11
10 GND
REF+
V
DD
13 REF+
REF-/AIN6
CNVST/AIN7
12 CNVST/AIN11
11 REF-/AIN10
9
AIN9 10
QSOP
QSOP
Pin Configurations continued at end of data sheet.
________________________________________________________________ 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.