MAX6698EE99+ Maxim Integrated Products, MAX6698EE99+ Datasheet - Page 7

• Manufacturer Part Number: MAX6698EE99+
• Description: IC TEMP MONITOR 7CH 16-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX6698EE99+

• 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-QSOP
• 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

Figure 1. Internal Block Diagram
From a software perspective, the MAX6698 appears as
a series of 8-bit registers that contain temperature mea-
surement data, alarm threshold values, and control bits.
A standard SMBus-compatible 2-wire serial interface is
used to read temperature data and write control bits
and alarm threshold data. The same SMBus slave
address also provides access to all functions.
The MAX6698 employs four standard SMBus protocols:
write byte, read byte, send byte, and receive byte
(Figure 2). The shorter receive byte protocol allows
quicker transfers, provided that the correct data regis-
7-Channel Precision Remote-Diode, Thermistor,
R
R
THER1
EXT1
R
R
THER1
EXT2
DXP1
DXP3
DXN1
DXN3
R
R
THER1
EXT1
_______________________________________________________________________________________
SMBus Digital Interface
3-TO-1
MUX
VREF1
10/100µA
3-TO-1
BUFFER
BUF1
MUX
INPUT
V
CC
and Local Temperature Monitor
DP
BUF2
VREF
ter was previously selected by a read byte instruction.
Use caution with the shorter protocols in multimaster
systems, since a second master could overwrite the
command byte without informing the first master. Figure
3 is the SMBus write timing diagram and Figure 4 is the
SMBus read timing diagram.
The remote diode 1 measurement channel provides 11
bits of data (1 LSB = 0.125°C). All other temperature-
measurement channels provide 8 bits of temperature
data (1 LSB = 1°C). The 8 most significant bits (MSBs)
can be read from the local temperature, remote tem-
perature, and thermistor registers. The remaining 3 bits
MAX6698
INTERFACE
SCL
SMBus
ADC
SDA
CNT
COUNTER
ALERT RESPONSE ADDRESS
REMOTE TEMPERATURES
LOCAL TEMPERATURES
OVERT THRESHOLD
ALERT THRESHOLD
COMMAND BYTE
REGISTER BANK
ALU
OVERT
ALERT
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