MAX6693UP9A+ Maxim Integrated Products, MAX6693UP9A+ Datasheet - Page 15

• Manufacturer Part Number: MAX6693UP9A+
• Description: IC TEMP MONITOR 7CH 20-TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX6693UP9A+

• 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: SMBus™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

acteristics. Manufacturers of discrete transistors do not
normally specify or guarantee ideality factor. This is
normally not a problem since good-quality discrete
transistors tend to have ideality factors that fall within a
relatively narrow range. We have observed variations in
remote temperature readings of less than ±2°C with a
variety of discrete transistors. Still, it is good design
practice to verify good consistency of temperature
readings with several discrete transistors from any
manufacturer under consideration.
If one or more of the remote diode channels is not
needed, disconnect the DXP and DXN inputs for that
channel, or connect the DXP input to V
register indicates a diode "fault" for this channel and the
channel is ignored during the temperature-measure-
ment sequence. It is also good practice to mask any
Table 7. Status 1 Register
7 (MSB)
BIT
6
5
4
3
2
1
0
7-Channel Precision Temperature Monitor
Remote 6 ALERT
Remote 5 ALERT
Remote 4 ALERT
Remote 3 ALERT
Remote 2 ALERT
Remote 1 ALERT
Local ALERT
______________________________________________________________________________________
Reserved
NAME
Unused Diode Channels
STATE
POR
0
0
0
0
0
0
0
0
CC
. The status
—
Local Channel High-Alert Bit. This bit is set to logic 1 when the local
temperature exceeds the temperature threshold limit in the local ALERT high-
limit register.
Channel 6 Remote-Diode High-Alert Bit. This bit is set to logic 1 when the
channel 6 remote-diode temperature exceeds the temperature threshold limit
in the remote 6 ALERT high-limit register.
Channel 5 Remote-Diode High-Alert Bit. This bit is set to logic 1 when the
channel 5 remote-diode temperature exceeds the programmed temperature
threshold limit in the remote 5 ALERT high-limit register.
Channel 4 Remote-Diode High-Alert Bit. This bit is set to logic 1 when the
channel 4 remote-diode temperature exceeds the temperature threshold limit
in the remote 4 ALERT high-limit register.
Channel 3 Remote-Diode High-Alert Bit. This bit is set to logic 1 when the
channel 3 remote-diode temperature exceeds the programmed temperature
threshold limit in the remote 3 ALERT high-limit register.
Channel 2 Remote-Diode High-Alert Bit. This bit is set to logic 1 when the
channel 2 remote-diode temperature exceeds the temperature threshold limit
in the remote 2 ALERT high-limit register.
Channel 1 Remote-Diode High-Alert Bit. This bit is set to logic 1 when the
channel 1 remote-diode temperature exceeds the temperature threshold limit
in the remote 1 ALERT high-limit register.
with Beta Compensation
unused channels immediately upon power-up by set-
ting the appropriate bits in the Configuration 2 and
Configuration 3 registers. This will prevent unused
channels from causing ALERT or OVERT to assert.
When sensing local temperature, the MAX6693 mea-
sures the temperature of the PCB to which it is soldered.
The leads provide a good thermal path between the
PCB traces and the die. As with all IC temperature sen-
sors, thermal conductivity between the die and the
ambient air is poor by comparison, making air tempera-
ture measurements impractical. Because the thermal
mass of the PCB is far greater than that of the
MAX6693, the device follows temperature changes on
the PCB with little or no perceivable delay. When mea-
suring the temperature of a CPU or other IC with an on-
chip sense junction, thermal mass has virtually no
Thermal Mass and Self-Heating
FUNCTION
15