MAX11644 Datasheet, PDF (1/21 Pages) Maxim Integrated Products – 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 1-/2-Channel, 2-Wire Serial, 12-Bit ADCs

19-5225; Rev 0; 4/10
EVAALVUAAILTAIOBNLEKIT
2.7V to 3.6V and 4.5V to 5.5V, Low-Power,
1-/2-Channel, 2-Wire Serial, 12-Bit ADCs
General Description
The MAX11644/MAX11645 low-power, 12-bit, 1-/2-
channel analog-to-digital converters (ADCs) feature
internal track/hold (T/H), voltage reference, clock, and
an I2C-compatible 2-wire serial interface. These
devices operate from a single supply of 2.7V to 3.6V
(MAX11645) or 4.5V to 5.5V (MAX11644) and require
only 670µA at the maximum sampling rate of 94.4ksps.
Supply current falls below 230µA for sampling rates
under 40ksps. AutoShutdown™ powers down the
devices between conversions, reducing supply current
to less than 1µA at low throughput rates. The
MAX11644/MAX11645 each measure two single-ended
or one differential input. 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 MAX11645 fea-
tures a 2.048V internal reference and the MAX11644
features a 4.096V internal reference.
The MAX11644/MAX11645 are available in an 8-pin
µMAX^® package. The MAX11644/MAX11645 are guar-
anteed over the extended temperature range (-40°C to
+85°C). For pin-compatible 10-bit parts, refer to the
MAX11646/MAX11647 data sheet.
Handheld Portable
Applications
Medical Instruments
Battery-Powered Test
Equipment
Solar-Powered Remote
Systems
Applications
Received-Signal-Strength
Indicators
System Supervision
Power-Supply Monitoring
Features
o High-Speed I²C-Compatible Serial Interface
400kHz Fast Mode
1.7MHz High-Speed Mode
o Single-Supply
2.7V to 3.6V (MAX11645)
4.5V to 5.5V (MAX11644)
o Internal Reference
2.048V (MAX11645)
4.096V (MAX11644)
o External Reference: 1V to V_DD
o Internal Clock
2-Channel Single-Ended or 1-Channel Fully
Differential
o Internal FIFO with Channel-Scan Mode
o Low Power
670µA at 94.4ksps
230µA at 40ksps
60µA at 10ksps
6µA at 1ksps
0.5µA in Power-Down Mode
o Software-Configurable Unipolar/Bipolar
o Small, 8-Pin µMAX Package
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
I²C SLAVE
ADDRESS
MAX11644EUA+ -40°C to +85°C 8 µMAX
0110110
MAX11645EUA+ -40°C to +85°C 8 µMAX
0110110
+Denotes a lead(Pb)-free/RoHs-compliant package.
Typical Operating Circuit and Selector Guide appear at end
of data sheet.
AutoShutdown is a trademark and µMAX is a registered trademark
of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
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.