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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6696 Datasheet

Dual Remote/Local Temperature Sensors

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MAX6696 pdf
19-3183; Rev 1; 5/04
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Dual Remote/Local Temperature Sensors with
SMBus Serial Interface
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
SMBus is a trademark of Intel Corp.
I2C is a trademark of Philips Corp. Purchase of I2C components
from Maxim Integrated Products, Inc., or one of its sublicensed
Associated Companies, conveys a license under the Philips
I2C Patent Rights to use these components in an I2C system,
provided that the system conforms to the I2C Standard
Specification as defined by Philips.
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/I2C™-Compatible Interface
PART
MAX6695AUB
MAX6696AEE
Ordering Information
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
10 µMAX
16 QSOP
Typical Operating Circuit
0.1µF
+3.3V
47
CPU VCC
DXP1
SMBDATA
SMBCLK
MAX6695 ALERT
DXN OT1
OT2
10k
EACH
DATA
CLOCK
INTERRUPT
TO µP
TO CLOCK
THROTTLING
TO SYSTEM
SHUTDOWN
DXP2
GND
GRAPHICS
PROCESSOR
Typical Operating Circuits continued at end of data sheet.
Pin Configurations appear at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6696 Datasheet

Dual Remote/Local Temperature Sensors

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MAX6696 pdf
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Dual Remote/Local Temperature Sensors with
SMBus Serial Interface
ABSOLUTE MAXIMUM RATINGS
VCC ...........................................................................-0.3V to +6V
DXP1, DXP2................................................-0.3V to (VCC + 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 (TA = +70°C)
10-Pin mMAX (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
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.
ELECTRICAL CHARACTERISTICS
(VCC = +3.0V to +3.6V, TA = 0°C to +125°C, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25°C)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Supply Voltage
Standby Supply Current
VCC
SMBus static, ADC in idle state
3.0 3.6 V
10 µA
Operating Current
Interface inactive, ADC active
0.5 1 mA
Conversion rate = 0.125Hz
35 70
Average Operating Current
Conversion rate = 1Hz
250 500
µA
Conversion rate = 4Hz
500 1000
Remote Temperature Error
(Note 1)
Local Temperature Error
Power-On Reset Threshold
POR Threshold Hysteresis
TRJ = +25°C to +100°C
(TA = +45°C to +85°C)
TRJ = 0°C to +125°C (TA = +25°C to +100°C)
TRJ = -40°C to +125°C (TA = 0°C to +125°C)
TRJ = -40°C to +125°C (TA = -40°C)
TA = +45°C to +85°C
TA = +25°C to +100°C
TA = 0°C to +125°C
TA = -40°C to +125°C
VCC, falling edge (Note 2)
-1.5
-3.0
-5.0
-2.0
-3.0
-4.5
1.3
+3.0
+3.0
1.45
500
+1.5
+3.0
+5.0
+2.0
+3.0
+4.5
1.6
°C
°C
V
mV
Undervoltage Lockout Threshold
Undervoltage Lockout Hysteresis
UVLO Falling edge of VCC disables ADC
2.2 2.8 2.95
V
90 mV
Conversion Time
Channel 1 rate 4Hz, channel 2 / local rate
2Hz (conversion rate register 05h)
Channel 1 rate 8Hz, channel 2 / local rate
4Hz (conversion rate register 06h)
112.5 125 137.5
56.25 62.5 68.75
ms
Remote-Diode Source Current
ALERT, OT1, OT2
High level
IRJ Low level
80 100 120
µA
8 10 12
Output Low Sink Current
Output High Leakage Current
INPUT PIN, ADD0, ADD1 (MAX6696)
VOL = 0.4V
VOH = 3.6V
6 mA
1 µA
Logic Input Low Voltage
Logic Input High Voltage
VIL
VIH
0.3 V
2.9 V
2 _______________________________________________________________________________________


Part Number MAX6696
Description Dual Remote/Local Temperature Sensors
Maker Maxim Integrated Products
Total Page 20 Pages
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