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MAX6695AUB+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19
General Description
The MAX6695/MAX6696 are precise, dual-remote, and
local digital temperature sensors. They accurately mea-
sure the temperature of their own die and two remote
diode-connected transistors, and report the tempera-
ture in digital form on a 2-wire serial interface. The
remote diode is typically the emitter-base junction of a
common-collector PNP on a CPU, FPGA, GPU, or ASIC.
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 MAX6695/MAX6696 can func-
tion autonomously with a programmable conversion
rate, which allows control of supply current and temper-
ature update rate to match system needs. For conver-
sion rates of 2Hz or less, the temperature is
represented as 10 bits + sign with a resolution of
+0.125°C. When the conversion rate is 4Hz, output data
is 7 bits + sign with a resolution of +1°C. The MAX6695/
MAX6696 also include an SMBus timeout feature to
enhance system reliability.
Remote temperature sensing accuracy is ±1.5°C be-
tween +60°C and +100°C with no calibration needed.
The MAX6695/MAX6696 measure temperatures from
-40°C to +125°C. In addition to the SMBus ALERT out-
put, the MAX6695/MAX6696 feature two overtempera-
ture limit indicators (OT1 and OT2), which are active
only while the temperature is above the corresponding
programmable temperature limits. The OT1 and OT2
outputs are typically used for fan control, clock throt-
tling, or system shutdown.
The MAX6695 has a fixed SMBus address. The
MAX6696 has nine different pin-selectable SMBus
addresses. The MAX6695 is available in a 10-pin
μMAX
®
and the MAX6696 is available in a 16-pin QSOP
package. Both operate throughout the -40°C to +125°C
temperature range.
Applications
Notebook Computers
Desktop Computers
Servers
Workstations
Test and Measurement Equipment
Features
♦ Measure One Local and Two Remote
Temperatures
♦ 11-Bit, +0.125°C Resolution
♦ High Accuracy ±1.5°C (max) from +60°C to +100°C
(Remote)
♦ ACPI Compliant
♦ Programmable Under/Overtemperature Alarms
♦ Programmable Conversion Rate
♦ Three Alarm Outputs: ALERT, OT1, and OT2
♦ SMBus/I
2
C-Compatible Interface
♦ Compatible with 65nm Process Technology
(Y Versions)
MAX6695/MAX6696
Dual Remote/Local Temperature Sensors with
SMBus Serial Interface
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
Typical Operating Circuit
19-3183; Rev 3; 4/11
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.
PART TEMP RANGE PIN-PACKAGE
MAX6695AUB+ -40°C to +125°C 10 μMAX
MAX6695YAUB+ -40°C to +125°C 10 μMAX
MAX6696AEE+ -40°C to +125°C 16 QSOP
MAX6696YAEE+ -40°C to +125°C 16 QSOP
Devices are also available in tape-and-reel packages. Specify
tape and reel by adding “T” to the part number when ordering.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configurations appear at end of data sheet.
CLOCK
DATA
TO SYSTEM
SHUTDOWN
GND
OT2
SMBCLK
OT1
SMBDATA
V
CC
INTERRUPT
TO μP
0.1μF
DXN
DXP1
47Ω
10kΩ
EACH
ALERT
+3.3V
CPU
TO CLOCK
THROTTLING
DXP2
GRAPHICS
PROCESSOR
MAX6695
Typical Operating Circuits continued at end of data sheet.
μMAX is a registered trademark of Maxim Integrated Products, Inc.
MAX6695/MAX6696
Dual Remote/Local Temperature Sensors with
SMBus Serial Interface
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.
V
CC
...........................................................................-0.3V to +6V
DXP1, DXP2................................................-0.3V to (V
CC
+ 0.3V)
DXN ......................................................................-0.3V to +0.8V
SMBCLK, SMBDATA, ALERT ...................................-0.3V to +6V
RESET, STBY, ADD0, ADD1, OT1, OT2 ...................-0.3V to +6V
SMBDATA Current .................................................1mA to 50mA
DXN Current ......................................................................±1mA
Continuous Power Dissipation (T
A
= +70°C)
10-Pin μMAX (derate 6.9mW/°C above +70°C) ........555.6mW
16-Pin QSOP (derate 8.3mW/°C above +70°C) .......666.7mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature .....................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
Soldering Temperature (reflow) .......................................+260°C
ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +3.6V, T
A
= 0°C to +125°C, unless otherwise noted. Typical values are at V
CC
= +3.3V and T
A
= +25°C)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
CC
3.0 3.6 V
Standby Supply Current SMBus static, ADC in idle state 10 μA
Operating Current Interface inactive, ADC active 0.5 1 mA
Conversion rate = 0.125Hz 35 70
Conversion rate = 1Hz 250 500
Average Operating Current
Conversion rate = 4Hz 500 1000
μA
T
RJ
= +25°C to +100°C
(T
A
= +45°C to +85°C)
-1.5 +1.5
T
RJ
= 0°C to +125°C (T
A
= +25°C to +100°C) -3.0 +3.0
T
RJ
= -40°C to +125°C (T
A
= 0°C to +125°C) -5.0 +5.0
Remote Temperature Error
(Note 1)
T
RJ
= -40°C to +125°C (T
A
= -40°C) +3.0
°C
T
A
= +45°C to +85°C -2.0 +2.0
T
A
= +25°C to +100°C -3.0 +3.0
T
A
= 0°C to +125°C -4.5 +4.5
Local Temperature Error
T
A
= -40°C to +125°C +3.0
°C
T
A
= +45°C to +85°C -3.8
T
A
= +25°C to +100°C -4.0
T
A
= 0°C to +125°C -4.2
Local Temperature Error
(MAX6695Y/MAX6696Y)
T
A
= -40°C to +125°C -4.4
°C
Power-On Reset Threshold V
CC
, falling edge (Note 2) 1.3 1.45 1.6 V
POR Threshold Hysteresis 500 mV
Undervoltage Lockout Threshold UVLO Falling edge of V
CC
disables ADC 2.2 2.8 2.95 V
Undervoltage Lockout Hysteresis 90 mV
Channel 1 rate 4Hz, channel 2 / local rate
2Hz (conversion rate register 05h)
112.5 125 137.5
Conversion Time
Channel 1 rate 8Hz, channel 2 / local rate
4Hz (conversion rate register 06h)
56.25 62.5 68.75
ms
High level 80 100 120
Remote-Diode Source Current I
RJ
Low level 8 10 12
μA
MAX6695/MAX6696
Dual Remote/Local Temperature Sensors with
SMBus Serial Interface
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, T
A
= 0°C to +125°C, unless otherwise noted. Typical values are at V
CC
= +3.3V and T
A
= +25°C)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ALERT, OT1, OT2
Output Low Sink Current V
OL
= 0.4V 6 mA
Output High Leakage Current V
OH
= 3.6V 1 μA
INPUT PIN, ADD0, ADD1 (MAX6696)
Logic Input Low Voltage V
IL
0.3 V
Logic Input High Voltage V
IH
2.9 V
INPUT PIN, RESET, STBY (MAX6696)
Logic Input Low Voltage V
IL
0.8 V
Logic Input High Voltage V
IH
2.1 V
Input Leakage Current I
LEAK
-1 +1 μA
SMBus INTERFACE (SMBCLK, SMBDATA, STBY)
Logic Input Low Voltage V
IL
0.8 V
Logic Input High Voltage V
IH
2.1 V
Input Leakage Current I
LEAK
V
IN
= GND or V
CC
±1 μA
Output Low Sink Current I
OL
V
OL
= 0.6V 6 mA
Input Capacitance C
IN
5 pF
SMBus-COMPATIBLE TIMING (Figures 4 and 5) (Note 2)
Serial Clock Frequency f
SCL
10 100 kHz
Bus Free Time Between STOP
and START Condition
t
BUF
4.7 μs
Repeat START Condition Setup
Time
t
SU:STA
90% of SMBCLK to 90% of SMBDATA 4.7 μs
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 μs
Clock High Period t
HIGH
90% to 90% 4.7 μs
Data Setup Time t
SU:DAT
250 ns
Data Hold Time t
HD:DAT
300 ns
SMB Rise Time t
R
1 μs
SMB Fall Time t
F
300 ns
SMBus Timeout SMBDATA low period for interface reset 20 30 40 ms
Note 1: Based on diode ideality factor of 1.008.
Note 2: Specifications are guaranteed by design, not production tested.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19

MAX6695AUB+

Mfr. #:
Buy MAX6695AUB+
Manufacturer:
Maxim Integrated
Description:
Board Mount Temperature Sensors Remote/Local Temperature Sensor
Lifecycle:
New from this manufacturer.
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