MAX6698UE38+ Maxim Integrated Products, MAX6698UE38+ Datasheet

IC TEMP MONITOR 7CH 16-TSSOP

MAX6698UE38+

Manufacturer Part Number
MAX6698UE38+
Description
IC TEMP MONITOR 7CH 16-TSSOP
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX6698EE99.pdf (24 pages)

Specifications of MAX6698UE38+

Function
Temp Monitoring System (Sensor)
Topology
ADC, Buffer, Multiplexer, Register Bank
Sensor Type
External & Internal
Sensing Temperature
-40°C ~ 125°C, External Sensor
Output Type
I²C™/SMBus™
Output Alarm
Yes
Output Fan
Yes
Voltage - Supply
3 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
16-TSSOP
Full Temp Accuracy
+/- 3.5 C, +/- 3 C
Digital Output - Bus Interface
Serial (2-Wire)
Digital Output - Number Of Bits
11 bit
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX6698 precision multichannel temperature sen-
sor monitors its own temperature, the temperatures of
three external diode-connected transistors, and the
temperatures of three thermistors. All temperature
channels have programmable alert thresholds.
Channels 1, 4, 5, and 6 also have programmable over-
temperature thresholds. When the measured tempera-
ture of a channel exceeds the respective threshold, a
status bit is set in one of the status registers. Two open-
drain outputs, OVERT and ALERT, assert correspond-
ing to these bits in the status register.
The 2-wire serial interface supports the standard system
management bus (SMBus™) protocols: write byte, read
byte, send byte, and receive byte for reading the tem-
perature data and programming the alarm thresholds.
The MAX6698 is specified for an operating temperature
range of -40°C to +125°C and is available in 16-pin
QSOP and 16-pin TSSOP packages.
19-3476; Rev 3; 8/07
SMBus is a trademark of Intel Corp.
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.
7-Channel Precision Remote-Diode, Thermistor,
Desktop Computers
Notebook Computers
________________________________________________________________ Maxim Integrated Products
General Description
Workstations
Servers
R
R
EX3
THER3
Applications
1
2
3
4
5
6
7
8
DXP1
DXN1
DXP2
DXN2
DXP3
DXN3
THER3
VREF
and Local Temperature Monitor
MAX6698
SMBDATA
SMBCLK
OVERT
THER1
THER2
ALERT
GND
V
CC
16
15
14
13
12
11
10
9
♦ Three Thermal-Diode Inputs and Three Thermistor
♦ Local Temperature Sensor
♦ 1°C Remote Temperature Accuracy (+60°C to
♦ Temperature Monitoring Begins at POR for Fail-
♦ ALERT and OVERT Outputs for Interrupts,
♦ Small 16-Pin QSOP and 16-Pin TSSOP Packages
♦ 2-Wire SMBus Interface
*See the Slave Address section.
Pin Configuration appears at end of data sheet.
MAX6698EE_ _
MAX6698UE_ _
R
R
EX2
THER2
Inputs
+100°C)
Safe System Protection
Throttling, and Shutdown
PART
R
THER1
R
EX1
Typical Application Circuit
-40°C to +125°C
-40°C to +125°C
+3.3V
TEMP RANGE
Ordering Information
PIN-
PACKAGE
16 QSOP
16 TSSOP
Features
PKG
CODE
E16-1
U16-1
1

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MAX6698UE38+ Summary of contents

Page 1

... Servers R EX3 R THER3 SMBus is a trademark of Intel Corp. ________________________________________________________________ Maxim Integrated Products 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. and Local Temperature Monitor ♦ Three Thermal-Diode Inputs and Three Thermistor Inputs ♦ Local Temperature Sensor ♦ ...

Page 2

Precision Remote-Diode, Thermistor, and Local Temperature Monitor ABSOLUTE MAXIMUM RATINGS , SCL, SDA, ALERT, OVERT to GND ................-0. DXP_ to GND..............................................-0. DXN_ to GND ........................................................-0.3V to +0.8V THER_ to GND..........................................................-0.3V to +6V VREF ...

Page 3

Precision Remote-Diode, Thermistor, ELECTRICAL CHARACTERISTICS (continued +3.0V to +5.5V -40°C to +125°C, unless otherwise noted. Typical values are PARAMETER SYMBOL Reference-Load Regulation Reference-Supply Rejection ALERT, OVERT Output Low Voltage Output Leakage ...

Page 4

Precision Remote-Diode, Thermistor, and Local Temperature Monitor (V = 3.3V +25°C, unless otherwise noted STANDBY SUPPLY CURRENT vs. SUPPLY VOLTAGE 3.8 3.3 ...

Page 5

Precision Remote-Diode, Thermistor 3.3V +25°C, unless otherwise noted TEMPERATURE ERROR vs. DXP-DXN CAPACITANCE 0 -0.5 -1.0 -1.5 -2.0 -2.5 -3.0 -3.5 -4.0 -4.5 -5 DXP-DXN CAPACITANCE (nF) PIN NAME Combined Current ...

Page 6

Precision Remote-Diode, Thermistor, and Local Temperature Monitor PIN NAME Thermistor Voltage Sense Input 2. Connect thermistor 2 between THER2 and ground and an external 9 THER2 resistor R EXT3 Thermistor Voltage Sense Input 1. Connect thermistor 1 between THER1 ...

Page 7

Precision Remote-Diode, Thermistor, DXP1 DXN1 3-TO-1 MUX DXP3 DXN3 R EXT1 R THER1 R EXT2 R THER1 R EXT1 R THER1 Figure 1. Internal Block Diagram SMBus Digital Interface From a software perspective, the MAX6698 appears as a series ...

Page 8

Precision Remote-Diode, Thermistor, and Local Temperature Monitor Write Byte Format S ADDRESS WR 7 bits Slave Address: equiva- lent to chip-select line of a 3-wire interface Read Byte Format S ADDRESS WR ACK 7 bits Slave Address: equiva- lent ...

Page 9

Precision Remote-Diode, Thermistor HIGH LOW SMBCLK SMBDATA SU:STA HD:STA SU:DAT A = START CONDITION B = MSB OF ADDRESS CLOCKED INTO SLAVE C = LSB OF ADDRESS CLOCKED INTO SLAVE D = ...

Page 10

Precision Remote-Diode, Thermistor, and Local Temperature Monitor ALERT Interrupt Mode An ALERT interrupt occurs when the internal or external temperature reading exceeds a high-temperature limit (user programmable). The ALERT interrupt output sig- nal can be cleared by reading the ...

Page 11

Precision Remote-Diode, Thermistor, Table 4. Command Byte Register Bit Assignment ADDRESS REGISTER (HEX) Local 07 Remote 1 01 Remote 2 02 Remote 3 03 Thermistor 1 04 Thermistor 2 05 Thermistor 3 06 Configuration 1 41 Configuration 2 42 ...

Page 12

Precision Remote-Diode, Thermistor, and Local Temperature Monitor Table 5. Configuration 1 Register BIT NAME 7(MSB) STOP 6 POR TIMEOUT 5 4 Fast remote 1 Resistance 3 cancellation 2 Reserved 1 Reserved 0 Reserved Table 6. Configuration 2 Register BIT ...

Page 13

Precision Remote-Diode, Thermistor, Table 7. Configuration 3 Register BIT NAME 7(MSB) Reserved 6 Reserved Mask Thermistor 3 5 OVERT Mask Thermistor 2 4 OVERT Mask Thermistor 1 3 OVERT 2 Reserved 1 Reserved Mask OVERT 1 0 either the ...

Page 14

Precision Remote-Diode, Thermistor, and Local Temperature Monitor Table 8. Status 1 Register BIT NAME POR STATE 7(MSB) Reserved 6 Local ALERT 5 Thermistor 3 ALERT 4 Thermistor 2 ALERT 3 Thermistor 1 ALERT Remote-Diode 3 2 ALERT Remote-Diode 2 ...

Page 15

Precision Remote-Diode, Thermistor, Table 9. Status 2 Register BIT NAME 7(MSB) Reserved 6 Reserved 5 Thermistor 3 OVERT 4 Thermistor 2 OVERT 3 Thermistor 1 OVERT 2 Reserved 1 Reserved 0 Remote 1 OVERT Table 10. Status 3 Register ...

Page 16

Precision Remote-Diode, Thermistor, and Local Temperature Monitor Table 11. Remote-Sensors Transistor Manufacturers MANUFACTURER Central Semiconductor (USA) CMPT3904 Rohm Semiconductor (USA) SST3904 Samsung (Korea) KST3904-TF Siemens (Germany) SMBT3904 Zetex (England) FMMT3904CT-ND Note: Discrete transistors must be diode connected (base shorted ...

Page 17

Precision Remote-Diode, Thermistor, 3) Route the DXP and DXN traces in parallel and in close proximity to each other. Each parallel pair of traces should remote diode. Route these traces away from any higher voltage traces, ...

Page 18

Precision Remote-Diode, Thermistor, and Local Temperature Monitor Table 13. Temperature vs. Thermistor Channel Data for a Betatherm 103A1 Thermistor and R = 1600Ω EXT THERM -20 96974 -19 91525 -18 86415 -17 81621 -16 ...

Page 19

Precision Remote-Diode, Thermistor, Table 13. Temperature vs. Thermistor Channel Data for a Betatherm 103A1 Thermistor and R = 1600Ω (continued) EXT THERM 19 13072.8 20 12493.7 21 11943.3 22 11420 23 10922.7 24 10449.9 ...

Page 20

Precision Remote-Diode, Thermistor, and Local Temperature Monitor Table 13. Temperature vs. Thermistor Channel Data for a Betatherm 103A1 Thermistor and R = 1600Ω (continued) EXT THERM 58 2673.9 59 2578.5 60 2487.1 61 2399.4 ...

Page 21

Precision Remote-Diode, Thermistor, Table 13. Temperature vs. Thermistor Channel Data for a Betatherm 103A1 Thermistor and R = 1600Ω (continued) EXT THERM 93 835.93 94 811.03 95 786.99 96 763.79 97 741.38 98 719.74 ...

Page 22

Precision Remote-Diode, Thermistor, and Local Temperature Monitor Pin Configuration TOP VIEW DXP1 1 DXN1 2 DXP2 3 MAX6698 DXN2 4 DXP3 5 DXN3 6 THER3 7 VREF 8 QSOP 22 ______________________________________________________________________________________ PROCESS: BiCMOS 16 GND 15 SMBCLK 14 SMBDATA ...

Page 23

Precision Remote-Diode, Thermistor, (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) ______________________________________________________________________________________ and Local Temperature Monitor Package Information PACKAGE OUTLINE, QSOP .150", .025" LEAD ...

Page 24

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products Package Information (continued) PACKAGE OUTLINE, TSSOP 4 ...

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