MAX6692YMSA+ Maxim Integrated Products, MAX6692YMSA+ Datasheet - Page 14
![IC SENSOR REMOTE SMBUS 8SOIC](/photos/1/39/13902/8-soic_21-0042b_sml.jpg)
MAX6692YMSA+
Manufacturer Part Number
MAX6692YMSA+
Description
IC SENSOR REMOTE SMBUS 8SOIC
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX6692MUAT.pdf
(16 pages)
Specifications of MAX6692YMSA+
Function
Temp Monitoring System (Sensor)
Topology
ADC, Multiplexer, Register Bank
Sensor Type
External & Internal
Sensing Temperature
0°C ~ 125°C, External Sensor
Output Type
I²C™/SMBus™
Output Alarm
Yes
Output Fan
Yes
Voltage - Supply
3 V ~ 5.5 V
Operating Temperature
-55°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Full Temp Accuracy
+/- 3 C
Digital Output - Bus Interface
Serial (2-Wire)
Digital Output - Number Of Bits
10 bit + Sign
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
0 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Precision SMBus-Compatible Remote/Local
Temperature Sensors with Overtemperature Alarms
When sensing local temperature, these devices are
intended to measure the temperature of the PCB to
which they are soldered. The leads provide a good ther-
mal path between the PCB traces and the die. Thermal
conductivity between the die and the ambient air is poor
by comparison, making air temperature measurements
impractical. Because the thermal mass of the PCB is far
greater than that of the MAX6648/MAX6692, the devices
follow temperature changes on the PCB with little or no
perceivable delay.
When measuring the temperature of a CPU or other IC
with an on-chip sense junction, thermal mass has virtu-
ally no effect; the measured temperature of the junction
tracks the actual temperature within a conversion cycle.
When measuring temperature with discrete remote sen-
sors, smaller packages, such as SOT23s, yield the best
thermal response times. Take care to account for ther-
mal gradients between the heat source and the sensor,
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OVERT
ALERT
DXN
DXP
Thermal Mass and Self-Heating
V
CC
Q
Q
R
R
S
S
DIODE
FAULT
LOCAL
REMOTE
MUX
ALERT RESPONSE ADDRESS
REMOTE TEMPERATURE
LOCAL TEMPERATURE
OVERT THRESHOLD
ALERT THRESHOLD
REGISTER BANK
COMMAND BYTE
and ensure that stray air currents across the sensor
package do not interfere with measurement accuracy.
Self-heating does not significantly affect measurement
accuracy. Remote-sensor self-heating due to the diode
current source is negligible. For the local diode, the
worst-case error occurs when autoconverting at the
fastest rate and simultaneously sinking maximum current
at the ALERT output. For example, with V
4Hz conversion rate and with ALERT sinking 1mA, the
typical power dissipation is:
θ
so assuming no copper PCB heat sinking, the resulting
temperature rise is:
Even under nearly worst-case conditions, it is difficult to
introduce a significant self-heating error.
J-A
ADC
for the 8-pin µMAX package is about +221°C/W,
ΔT = 2.9mW x (+221°C/W) = +0.6409°C
5.0V x 500µA + 0.4V x 1mA = 2.9mW
8
8
MAX6648
MAX6692
READ
7
WRITE
CONTROL
ADDRESS
DECODER
SMBus
LOGIC
Functional Diagram
2
SMBDATA
SMBCLK
CC
= 5.0V, at a