19-2334; Rev 3; 11/04
2.7V to 3.6V and 4.5V to 5.5V, Low-Power,
4-/12-Channel, 2-Wire Serial 10-Bit ADCs
General Description
Features
♦ High-Speed I C-Compatible Serial Interface
400kHz Fast Mode
2
The MAX1136–MAX1139 low-power, 10-bit, multichannel
analog-to-digital converters (ADCs) feature internal
track/hold (T/H), voltage reference, clock, and an
1.7MHz High-Speed Mode
♦ Single-Supply
2
I C*-compatible 2-wire serial interface. These devices
operate from a single supply of 2.7V to 3.6V (MAX1137/
MAX1139) or 4.5V to 5.5V (MAX1136/MAX1138) and
require only 670µA at the maximum sampling rate of
94.4ksps. Supply current falls below 230µA for sampling
rates under 46ksps. AutoShutdown™ powers down the
devices between conversions, reducing supply current to
less than 1µA at low throughput rates. The
MAX1136/MAX1137 have four analog input channels
each, while the MAX1138/MAX1139 have 12 analog input
channels each. The fully differential analog inputs are
software configurable for unipolar or bipolar, and single
ended or differential operation.
2.7V to 3.6V (MAX1137/MAX1139)
4.5V to 5.5V (MAX1136/MAX1138)
♦ Internal Reference
2.048V (MAX1137/MAX1139)
4.096V (MAX1136/MAX1138)
♦ External Reference: 1V to V
♦ Internal Clock
DD
♦ 4-Channel Single-Ended or 2-Channel Fully
Differential (MAX1136/MAX1137)
♦ 12-Channel Single-Ended or 6-Channel Fully
Differential (MAX1138/MAX1139)
♦ Internal FIFO with Channel-Scan Mode
♦ Low Power
The full-scale analog input range is determined by the
internal reference or by an externally applied reference
voltage ranging from 1V to V . The MAX1137/
DD
670µA at 94.4ksps
230µA at 40ksps
60µA at 10ksps
6µA at 1ksps
MAX1139 feature a 2.048V internal reference and the
MAX1136/MAX1138 feature a 4.096V internal reference.
The MAX1136/MAX1137 are available in an 8-pin µMAX®
package. The MAX1138/MAX1139 are available in a
16-pin QSOP package. The MAX1136–MAX1139 are
guaranteed over the extended temperature range
(-40°C to +85°C). For pin-compatible 12-bit parts, refer to
the MAX1136–MAX1139 data sheet. For pin-compatible
8-bit parts, refer to the MAX1036–MAX1039 data sheet.
0.5µA in Power-Down Mode
♦ Software-Configurable Unipolar/Bipolar
♦ Small Packages
8-Pin µMAX (MAX1136/MAX1137)
16-Pin QSOP (MAX1138/MAX1139)
Applications
Ordering Information
Hand-Held Portable
Applications
Medical Instruments
Battery-Powered Test
Equipment
Solar-Powered Remote
Systems
PIN-
PACKAGE
I2C SLAVE
ADDRESS
PART
TEMP RANGE
Received-Signal-Strength
Indicators
System Supervision
MAX1136EUA
-40°C to +85°C 8 µMAX
0110100
0110000
0110010
0110110
0110100
0110000
0110010
0110110
0110101
0110001
0110011
0110111
MAX1136KEUA -40°C to +85°C 8 µMAX
MAX1136LEUA -40°C to +85°C 8 µMAX
MAX1136MEUA -40°C to +85°C 8 µMAX
MAX1137EUA -40°C to +85°C 8 µMAX
MAX1137KEUA -40°C to +85°C 8 µMAX
MAX1137LEUA -40°C to +85°C 8 µMAX
MAX1137MEUA -40°C to +85°C 8 µMAX
Selector Guide
INTERNAL
REFERENCE VOLTAGE
SUPPLY
INPUT
PART
INL
(LSB)
CHANNELS
(V)
(V)
MAX1136
MAX1137
MAX1138
MAX1139
4
4
4.096
2.048
4.096
2.048
4.5 to 5.5
2.7 to 3.6
4.5 to 5.5
2.7 to 3.6
1
1
1
1
MAX1138EEE
MAX1138KEEE
MAX1138LEEE
-40°C to +85°C 16 QSOP
-40°C to +85°C 16 QSOP
-40°C to +85°C 16 QSOP
12
12
*Purchase of I2C components from Maxim Integrated Products,
Inc., or one of its sublicensed Associated Companies, conveys
a license under the Philips I2C Patent Rights to use these com-
ponents in an I2C system, provided that the system conforms to
the I2C Standard Specification as defined by Philips.
MAX1138MEEE -40°C to +85°C 16 QSOP
Ordering Information continued at end of data sheet.
Pin Configurations and Typical Operating Circuit appear at
end of data sheet.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
µMAX is a registered 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.