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MAX6692YMUA+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
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.
General Description
The MAX6648/MAX6692 are precise, two-channel digi-
tal temperature sensors. They accurately measure the
temperature of their own die and a remote PN junction,
and report the temperature in digital form using a 2-wire
serial interface. The remote PN junction is typically the
emitter-base junction of a common-collector PNP on a
CPU, FPGA, or ASIC.
The 2-wire serial interface accepts standard System
Management Bus (SMBus)™ write byte, read byte,
send byte, and receive byte commands to read the
temperature data and to program the alarm thresholds.
To enhance system reliability, the MAX6648/MAX6692
include an SMBus timeout. A fault queue prevents the
ALERT and OVERT outputs from setting until a fault has
been detected one, two, or three consecutive times
(programmable).
The MAX6648/MAX6692 provide two system alarms:
ALERT and OVERT. ALERT asserts when any of four tem-
perature conditions are violated: local overtemperature,
remote overtemperature, local undertemperature, or
remote undertemperature. OVERT asserts when the tem-
perature rises above the value in either of the two OVERT
limit registers. The OVERT output can be used to activate
a cooling fan, or to trigger a system shutdown.
Measurements can be done autonomously, with the
conversion rate programmed by the user, or in a single-
shot mode. The adjustable conversion rate allows the
user to optimize supply current and temperature
update rate to match system needs.
Remote accuracy is ±0.8°C maximum error between
+25°C and +125°C with no calibration needed. The
MAX6648/MAX6692 operate from -55°C to +125°C, and
measure temperatures between 0°C and +125°C. The
MAX6648 is available in an 8-pin µMAX
®
package, and the
MAX6692 is available in 8-pin µMAX and SO packages.
Applications
Desktop Computers
Notebook Computers
Servers
Thin Clients
Workstations
Test and Measurement
Multichip Modules
Features
o Dual Channel Measures Remote and Local
Temperature
o +0.125°C Resolution
o High Accuracy ±0.8°C (max) from +25°C to +125°C
(Remote), and ±2°C (max) from +60°C to +100°C
(Local)
o Two Alarm Outputs: ALERT and OVERT
o Two Default OVERT Thresholds Available
MAX6648: +110°C
MAX6692: +85°C
o Programmable Conversion Rate
o SMBus-Compatible Interface
o SMBus Timeout
o Programmable Under/Overtemperature Alarm
Thresholds
o Compatible with 90nm, 65nm, and 45nm Process
Technology
MAX6648/MAX6692
Precision SMBus-Compatible Remote/Local
Temperature Sensors with Overtemperature Alarms
________________________________________________________________________________________________________________________________
Maxim Integrated Products
1
Ordering Information
V
CC
DXP
DXN
10kΩ EACH
CLOCK
TO FAN DRIVER OR
SYSTEM SHUTDOWN
3.3V
DATA
INTERRUPTED TO μP
200Ω
0.1μF
SDA
SCLK
ALERT
GND
2200pF
μP
OVERT
MAX6648
MAX6692
Typical Operating Circuit
19-2545; Rev 4; 6/08
PART
PIN-
PACKAGE
MEASURED
TEMP RANGE
MAX6648MUA 8 µMAX 0°C to +125°C
MAX6648YMUA 8 µMAX 0°C to +125°C
MAX6692MUA 8 µMAX 0°C to +125°C
MAX6692MSA 8 SO 0°C to +125°C
MAX6692YMUA 8 µMAX 0°C to +125°C
MAX6692YMSA 8 SO 0°C to +125°C
SMBus is a trademark of Intel Corp.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Pin Configuration and Functional Diagram appear at end of
data sheet.
Note: All devices operate over the -55°C to +125°C temperature
range.
MAX6648/MAX6692
Precision SMBus-Compatible Remote/Local
Temperature Sensors with Overtemperature Alarms
2
______________________________________________________________________________________________________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
(All voltages referenced to GND.)
V
CC
...........................................................................-0.3V to +6V
DXP.............................................................-0.3V to (V
CC
+ 0.3V)
DXN .......................................................................-0.3V to +0.8V
SCLK, SDA, ALERT, OVERT.....................................-0.3V to +6V
SDA, ALERT, OVERT Current .............................-1mA to +50mA
DXN Current .......................................................................±1mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin µMAX (derate 5.9mW/°C above +70°C) .............471mW
8-Pin SO (derate 5.9mW/°C above +70°C)..................471mW
ESD Protection (all pins, Human Body Model) ................±2000V
Junction Temperature......................................................+150°C
Operating Temperature Range .........................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
CC
= 3.0V to 5.5V, T
A
= -55°C to +125°C, unless otherwise specified. Typical values are at V
CC
= 3.3V and T
A
= +85°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
CC
3.0 5.5 V
0.125 °C
Temperature Resolution
10 Bits
V
CC
= 3.3V,
T
A
= +85°C
T
RJ
= +25°C to +125°C -0.8 +0.8
T
RJ
= +60°C to +100°C -1.0 +1.0
V
CC
= 3.3V,
+60°C ≤ T
A
≤
+100°C
T
RJ
= 0°C to +125°C -1.6 +1.6
Remote Temperature Error
n = 1.008
V
CC
= 3.3V, +0°C
≤ T
A
≤ +100°C
T
RJ
= 0°C to +125°C -3.0 +3.0
°C
T
A
= +60°C to +100°C -2.0 +2.0
Local Temperature Error V
CC
= 3.3V
T
A
= 0°C to +125°C -3.0 +3.0
°C
T
A
= + 60°C to + 100°C - 4.0
Local Temperature Error
(MAX6648Y/MAX6692Y)
V
C C
= 3.3V
T
A
= 0°C to +125°C -4.4
°C
Supply Sensitivity of Temperature
Error
±0.2 °C/V
Undervoltage Lockout (UVLO)
Threshold
UVLO Falling edge of V
CC
disables ADC 2.4 2.7 2.95 V
UVLO Hysteresis 90 mV
Power-On-Reset (POR) Threshold V
CC
falling edge 2.0 V
POR Threshold Hysteresis 90 mV
Standby Supply Current SMBus static 3.5 12 µA
Operating Current During conversion 0.45 0.8 mA
0.25 conversions per second 40 80
Average Operating Current
2 conversions per second 250 400
µA
Conversion Time t
CONV
From stop bit to conversion completion 95 125 156 ms
Conversion Time Error -25 +25 %
DXP and DXN Leakage Current Standby mode 100 nA
MAX6648/MAX6692
Precision SMBus-Compatible Remote/Local
Temperature Sensors with Overtemperature Alarms
______________________________________________________________________________________________________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 3.0V to 5.5V, T
A
= -55°C to +125°C, unless otherwise specified. Typical values are at V
CC
= 3.3V and T
A
= +85°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
High level 80 100 120
Remote-Diode Source Current I
RJ
Low level 8 10 12
µA
ALERT, OVERT
I
SINK
= 1mA 0.4
Output Low Voltage
I
SINK
= 4mA 0.6
V
Output High Leakage Current V
OH
= 5.5V 1 µA
SMBus-COMPATIBLE INTERFACE (SCLK AND SDA)
Logic Input Low Voltage V
IL
0.8 V
V
CC
= 3.0V 2.2
Logic Input High Voltage V
IH
V
CC
= 5.5V 2.6
V
Input Leakage Current I
LEAK
V
IN
= GND or V
CC
-1 +1 µA
Output Low-Sink Current I
SINK
V
OL
= 0.6V 6 mA
Input Capacitance C
IN
5pF
SMBus-COMPATIBLE TIMING (Note 2)
Serial Clock Frequency f
SCLK
(Note 3) 100 kHz
Bus Free Time Between STOP and
START Condition
t
BUF
4.7 µs
START Condition Setup Time 4.7 µs
Repeat START Condition Setup
Time
t
SU:STA
90% to 90% 50 ns
START Condition Hold Time t
HD:STA
10% of SDA to 90% of SCLK 4 µs
STOP Condition Setup Time t
SU:STO
90% of SCLK to 90% of SDA 4 µs
Clock Low Period t
LOW
10% to 10% 4.7 µs
Clock High Period t
HIGH
90% to 90% 4 µs
Data Setup Time t
HD:DAT
(Note 4) 250 µs
Receive SCLK/SDA Rise Time t
R
1µs
Receive SCLK/SDA Fall Time t
F
300 ns
Pulse Width of Spike Suppressed t
SP
050ns
SMBus Timeout t
TIMEOUT
SDA low period for interface reset 25 37 55 ms
Note 1: All parameters tested at a single temperature. Specifications over temperature are guaranteed by design.
Note 2: Timing specifications guaranteed by design.
Note 3: The serial interface resets when SCLK is low for more than t
TIMEOUT
.
Note 4: A transition must internally provide at least a hold time to bridge the undefined region (300ns max) of SCLK’s falling edge.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MAX6692YMUA+T

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Buy MAX6692YMUA+T
Manufacturer:
Maxim Integrated
Description:
Board Mount Temperature Sensors Remote/Local Temperature Sensor
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