Rainbow Electronics MAX1139 - Manual

General Description
The MAX1136–MAX1139 low-power, 10-bit, multichan-
nel analog-to-digital converters (ADCs) feature internal
track/hold (T/H), voltage reference, clock, and an
I
2 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 sam-
pling rates under 46ksps. AutoShutdown™ powers
down the devices between conversions, reducing sup-
ply current to less than 1µA at low throughput rates.
The MAX1136/MAX1137 have four analog input chan-
nels each, while the MAX1138/MAX1139 have 12 ana-
log input channels each. The fully differential analog
inputs are software configurable for unipolar or bipolar,
and single ended or differential operation.
The full-scale analog input range is determined by the
internal reference or by an externally applied reference
voltage ranging from 1V to V
DD . The MAX1137/
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-compati-
ble 8-bit parts, refer to the MAX1036–MAX1039 data
sheet.
Applications
Hand-Held Portable Applications
Medical Instruments
Battery-Powered Test Equipment
Solar-Powered Remote Systems
Received-Signal-Strength Indicators
System Supervision
Features
♦ High-Speed I 2 C-Compatible Serial Interface
400kHz Fast Mode
1.7MHz High-Speed Mode
♦ Single-Supply
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
DD
♦ Internal Clock
♦ 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
670µA at 94.4ksps
230µA at 40ksps
60µA at 10ksps
6µA at 1ksps
0.5µA in Power-Down Mode
♦ Software-Configurable Unipolar/Bipolar
♦ Small Packages
8-Pin µMAX (MAX1136/MAX1137)
16-Pin QSOP (MAX1138/MAX1139)
MAX1136–MAX1139
2.7V to 3.6V and 4.5V to 5.5V, Low-Power,
4-/12-Channel, 2-Wire Serial 10-Bit ADCs
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-2334; Rev 1; 4/02
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.
Pin Configurations appear at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
Selector Guide appears at end of data sheet.
PART
TEMP
RANGE
PIN-
PACKAGE INL
(LSB)
MAX1136EUA -40 °C to +85°C 8 µMAX ±1
MAX1137EUA -40 °C to +85°C 8 µMAX ±1
MAX1138EEE -40 °C to +85°C 16 QSOP ±1
MAX1139EEE -40 °C to +85°C 16 QSOP ±1
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
I 2 C is a trademark of Philips Corp.