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MAX6658MSA+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
General Description
The MAX6657/MAX6658/MAX6659 are precise, two-
channel digital temperature sensors. Each accurately
measures the temperature of its own die and one
remote PN junction, and reports the temperature in digi-
tal form on a 2-wire serial interface. The remote junction
can be a diode-connected transistor like the low-cost
NPN type 2N3904 or 2N3906 PNP type. The remote
junction can also be a common-collector PNP, such as
a substrate PNP of a microprocessor.
The 2-wire serial interface accepts standard System
Management Bus (SMBus™) commands such as Write
Byte, Read Byte, Send Byte, and Receive Byte to read
the temperature data and program the alarm thresholds
and conversion rate. The MAX6657/MAX6658/
MAX6659 can function autonomously with a program-
mable conversion rate, which allows the control of sup-
ply current and temperature update rate to match
system needs. For conversion rates of 4Hz or less, the
temperature is represented in extended mode as 10
bits + sign with a resolution of 0.125°C. When the con-
version rate is faster than 4Hz, output data is 7 bits +
sign with a resolution of 1°C. The MAX6657/
MAX6658/MAX6659 also include an SMBus timeout
feature to enhance system reliability.
Remote accuracy is ±1°C between +60°C and +100°C
with no calibration needed. The MAX6657 measures
temperatures from 0°C to +125°C and the MAX6658/
MAX6659 from -55°C to +125°C. The MAX6659 has the
added benefit of being able to select one of three
addresses through an address pin, and a second over-
temperature alarm pin for greater system reliability.
Applications
Desktop Computers Workstations
Notebook Computers
Servers
Features
o Dual Channel Measures Remote and Local
Temperature
o 11-Bit, +0.125°C Resolution
o High Accuracy ±1°C (max) from +60°C to +100°C
(Remote)
o No Calibration Required
o Programmable Under/Overtemperature Alarms
o Programmable Conversion Rate
(0.0625Hz to 16Hz)
o SMBus/I
2
C-Compatible Interface
o Two Alarm Outputs: ALERT and OVERT1
(MAX6657 and MAX6658)
o Three Alarm Outputs: ALERT, OVERT1,
and OVERT2 (MAX6659)
o Compatible with 65nm Process Technology
(Y Versions)
MAX6657/MAX6658/MAX6659
±1°C, SMBus-Compatible Remote/Local Temperature
Sensors with Overtemperature Alarms
________________________________________________________________
Maxim Integrated Products
1
19-2034; Rev 5; 10/10
Ordering Information
PART
MEASURED TEMP
RANGE
PIN-PACKAGE
MAX6657MSA 0°C to +125°C 8 SO
MAX6657MSA+ 0°C to +125°C 8 SO
MAX6657MSA-T 0°C to +125°C 8 SO
MAX6657MSA+T 0°C to +125°C 8 SO
MAX6657YMSA+ 0°C to +125°C 8 SO
MAX6657YMSA+T 0°C to +125°C 8 SO
SMBus is a trademark of Intel Corp.
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
V
CC
N.C.
STBY
SMBCLK
N.C.
SMBDATA
N.C.
OVERT2
ALERT
TOP VIEW
MAX6659
QSOP
N.C.
DXP
OVERT1
DXN
ADD
GND
GND
ALERT
GNDOVERT1
1
2
8
7
SMBCLK
SMBDATADXP
DXN
V
CC
SO
3
4
6
5
MAX6657
MAX6658
Pin Configurations
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.
Typical Operating Circuit appears at the end of the data
sheet.
Ordering Information continued at end of data sheet.
Note: All devices are specified over the -55°C to +125°C oper-
ating temperature range.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
MAX6657/MAX6658/MAX6659
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
SMBCLK, SMBDATA, ALERT, OVERT1,
OVERT2 ..............................................................-0.3V to +6V
SMBDATA, ALERT, OVERT1, OVERT2
Current ..........................................................-1mA to +50mA
DXN Current ......................................................................±1mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SO (derate 5.9mW/°C above +70°C) .................471mW
16-Pin QSOP (derate 8.3mW/°C above +70°C) ..........664mW
Junction Temperature .....................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
Soldering Temperature (reflow)
Lead(Pb)-free ..............................................................+260°C
Containing lead(Pb) ....................................................+240°C
ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +5.5V, T
A
= 0°C to +125°C, unless otherwise specified. Typical values are at V
CC
= +3.3V and T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
1°C
Temperature Resolution,
Legacy Mode
8 Bits
0.125 °C
Temperature Resolution,
Extended Mode
11 Bits
T
RJ
= +60°C to +100°C, V
CC
= +3.3V
(Note 1)
-1.0 +1.0
T
RJ
= 0°C to +100°C, V
CC
= +3.3V (Note 1) -3.0 +3.0
Remote Temperature Error
(MAX6657, MAX6657Y)
T
RJ
= 0°C to +125°C, V
CC
= +3.3V (Note 1) -5.0 +5.0
°C
T
A
= +60°C to +100°C, V
CC
= +3.3V -2.0 +2.0
T
A
= 0°C to +100°C, V
CC
= +3.3V -3.0 +3.0
Local Temperature Error
(MAX6657)
T
A
= 0°C to +125°C, V
CC
= +3.3V -5.0 +5.0
°C
T
RJ
= +60°C to +100°C, V
CC
= +3.3V
(Note 1)
-1.0 1.0
T
RJ
= 0°C to +100°C, V
CC
= +3.3V (Note 1) -3.0 3.0
Remote Temperature Error
(MAX6658/MAX6659/
MAX6658Y/MAX6659Y)
T
RJ
= -55°C to +125°C, V
CC
= +3.3V (Note 1) -5.0 +5.0
°C
T
A
= +60°C to +100°C, V
CC
= +3.3V -2.0 +2.0
T
A
= 0°C to +100°C, V
CC
= +3.3V -3.0 +3.0
Local Temperature Error
(MAX6658/MAX6659)
T
A
= -55°C to +125°C, V
CC
= +3.3V (Note 2) -5.0 +5.0
°C
T
A
= +60°C to +100°C, V
CC
= +3.3V -3.8
T
A
= 0°C to +100°C, V
CC
= +3.3V -4.0
Local Temperature Error
(MAX665_Y)
T
A
= 0°C to +125°C, V
CC
= +3.3V -4.4
°C
Line Regulation 3.0V ≤ V
CC
≤ 5.5V 0.2 0.6 m°C/V
Supply Voltage Range V
CC
3.0 5.5 V
Undervoltage Lockout Threshold UVLO Falling edge of V
CC
disables ADC 2.60 2.80 2.95 V
Undervoltage Lockout Hysteresis 90 mV
Power-On Reset (POR) Threshold V
CC
, falling edge 1.5 2.0 2.5 V
POR Threshold Hysteresis 90 mV
Standby Supply Current SMBus static 3 10 µA
Operating Current During conversion 0.5 1.0 mA
±1°C, SMBus-Compatible Remote/Local Temperature
Sensors with Overtemperature Alarms
MAX6657/MAX6658/MAX6659
_______________________________________________________________________________________ 3
Note 1: T
A
= +25°C to +85°C.
Note 2: If both the local and the remote junction are below T
A
= -20°C, then V
CC
> 3.15V.
Note 3: For conversion rates of 4Hz or slower, the conversion time doubles.
Note 4: Timing specifications guaranteed by design.
Note 5: The serial interface resets when SMBCLK is low for more than t
TIMEOUT
.
Note 6: A transition must internally provide at least a hold time to bridge the undefined region (300ns max) of SMBCLK's falling edge.
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +5.5V, T
A
= 0°C to +125°C, unless otherwise specified. Typical values are at V
CC
= +3.3V and T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
0.25 conversions/s 40 70
Average Operating Current
2 conversions/s 150 250
µA
Conversion Time t
CONV
From stop bit to conversion completed
(Note 4)
95 125 156 ms
Conversion Timing Error ±25 %
DXP and DXN Leakage Current In standby mode 100 nA
High level 80 100 120
Remote-Diode Source Current I
RJ
Low level 8 10 12
µA
(ALERT, OVERT)
V
OL
= 0.4V 1
Output Low Sink Current
V
OL
= 0.6V 6
mA
Output High Leakage Current V
OH
= 5.5V 1 µA
SMBus-COMPATIBLE INTERFACE (SMBCLK, SMBDATA, STBY)
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 2.4
V
Input Leakage Current I
LEAK
V
IN
= V
GND
or V
CC
±1 µA
Output Low Sink Current I
OL
V
OL
= 0.6V 6 mA
Input Capacitance C
IN
5pF
SMBus-COMPATIBLE TIMING (Note 4)
Serial-Clock Frequency f
SCL
(Note 5) 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 SMBDATA to 90% of SMBCLK 4 µs
STOP Condition Setup Time t
SU:STO
90% of SMBCLK to 90% of SMBDATA 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 6) 0 µs
Receive SCL/SDA Rise Time t
R
1µs
Receive SCL/SDA Fall Time t
F
300 ns
Pulse Width of Spike Suppressed t
SP
050ns
SMBus Timeout SMBDATA low period for interface reset 25 37 45 ms
±1°C, SMBus-Compatible Remote/Local Temperature
Sensors with Overtemperature Alarms
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MAX6658MSA+T

Mfr. #:
Buy MAX6658MSA+T
Manufacturer:
Maxim Integrated
Description:
Board Mount Temperature Sensors Remote/Local Temperature Senso
Lifecycle:
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