General Description
The MAX1361/MAX1362 low-power, 10-bit, 4-channel,
analog-to-digital converters (ADCs) feature a digitally
programmable window comparator with an interrupt out-
put for automatic system-monitoring applications. Once
configured, monitor mode automatically asserts an inter-
rupt when any analog input exceeds the programmed
upper or lower thresholds, without interaction to the
host. The MAX1361/MAX1362 respond to the SMBus™
alert, allowing quick identification of the alarming device
on a shared interrupt. A programmable delay between
monitoring intervals lowers power consumption at
reduced monitoring rates.
In addition, the MAX1361/MAX1362 integrate an internal
voltage reference, a clock, and a 1.7MHz, high-speed,
I
2
C-compatible, 2-wire, serial interface. The optimized
interface allows a maximum conversion rate of 94.4ksps
in normal mode while reading back the conversion
results. Each of the four analog inputs is configurable for
single-ended or fully differential operation and unipolar
or bipolar operation. Two scan modes utilize on-chip
random access memory (RAM) to allow eight conver-
sions of a selected channel or scanning of a group of
channels to reduce interface overhead.
These devices operate from a single 2.7V to 3.6V
(MAX1361) or 4.5V to 5.5V (MAX1362) supply and
require only 436µA at the maximum sampling rate of
150ksps in monitor mode and 670µA at the maximum
sampling rate of 94.4ksps. AutoShutdown™ powers
down the devices between conversions, reducing sup-
ply current to less than 0.5µA when idle.
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 MAX1361 features
a 2.048V internal reference, and the MAX1362 features
a 4.096V internal reference.
The MAX1361/MAX1362 are available in a 10-pin
µMAX
®
package and are specified over the extended
-40°C to +85°C temperature range. For 12-bit applica-
tions, refer to the pin-compatible MAX1363/MAX1364
data sheet.
Applications
System Monitoring/Supervision
Servers/Workstations
High Reliability Power Supplies
Medical Instrumentation
Features
♦ Monitor Mode
Programmable Lower/Upper Trip Threshold
Alarm-Status Register Records Fault Events
SMBus Alert Response
Programmable Sampling Intervals
♦ 10-Bit I
2
C-Compatible ADC
±1 LSB INL, ±1 LSB DNL
♦ 4-Channel Single-Ended or 2-Channel Fully
Differential Inputs
♦ Software Programmable Bipolar/Unipolar
Conversions
♦ Fast Sampling Rate
94.4ksps While Continuously Reading
Conversions
150ksps in Monitor Mode
♦ High-Speed I
2
C-Compatible Serial Interface
100kHz/400kHz Standard/Fast Mode
Up to 1.7MHz High-Speed Mode
4 Available I
2
C Slave Addresses
♦ Single Supply
2.7V to 3.6V (MAX1361)
4.5V to 5.5V (MAX1362)
♦ Internal Reference
2.048V (MAX1361)
4.096V (MAX1362)
♦ External Reference: 1V to V
DD
♦ Low Power
436µA in Monitor Mode (150ksps)
670µA at 94.4ksps
6µA at 1ksps
0.5µA in Power-Down Mode
♦ Small Package
10-Pin µMAX
MAX1361/MAX1362
4-Channel, 10-Bit, System Monitors with Programmable
Trip Window and SMBus Alert Response
________________________________________________________________
Maxim Integrated Products
1
Ordering Information/Selector Guide
19-3268; Rev 5; 9/10
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.
