MAX6697UP9C+ Maxim Integrated Products, MAX6697UP9C+ Datasheet - Page 12

• Manufacturer Part Number: MAX6697UP9C+
• Description: IC TEMP MON 7CH PREC 20TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX6697UP9C+

• Function: Temp Monitoring System (Sensor)
• Topology: ADC, Buffer, 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: 20-TSSOP
• Full Temp Accuracy: +/- 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

cases, the alert is cleared even if the fault condition
exists, but the ALERT output reasserts at the end of the
next conversion. The bits indicating the fault for the
OVERT interrupt output clear only on reading the status
2 register even if the fault conditions still exist. Reading
the status 2 register does not clear the OVERT interrupt
output. To eliminate the fault condition, either the mea-
sured temperature must drop below the temperature
threshold minus the hysteresis value (4°C), or the trip
temperature must be set at least 4°C above the current
temperature.
The MAX6697 directly measures the die temperature of
CPUs and other ICs that have on-chip temperature-
7-Channel Precision Temperature Monitor
Table 4. Configuration 1 Register
Table 5. Configuration 2 Register
12
7(MSB)
7(MSB)
BIT
______________________________________________________________________________________
BIT
6
5
4
3
2
1
0
6
5
4
3
2
1
0
Mask Local ALERT
Applications Information
Fast remote 1
Mask ALERT 6
Mask ALERT 5
Mask ALERT 4
Mask ALERT 3
Mask ALERT 2
Mask ALERT 1
cancellation
Resistance
TIMEOUT
Reserved
Reserved
Reserved
Reserved
NAME
STOP
POR
NAME
Remote-Diode Selection
STATE
POR
STATE
0
0
0
0
0
0
0
0
POR
0
0
0
0
0
0
0
0
Standby Mode Control Bit. If STOP is set to logic 1, the MAX6697 stops
converting and enters standby mode.
Reset Bit. Set to logic 1 to put the device into its power-on state. This bit is self-
clearing.
Timeout Enable Bit. Set to logic 0 to enable SMBus timeout.
Channel 1 Fast Conversion Bit. Set to logic 1 to enable fast conversion of
channel 1.
Resistance Cancellation Bit. When set to logic 1, the MAX6697 cancels series
resistance in the channel 1 thermal diode.
—
—
—
Local Alert Mask. Set to logic 1 to mask local channel ALERT.
Channel 6 Alert Mask. Set to logic 1 to mask channel 6 ALERT.
Channel 5 Alert Interrupt Mask. Set to logic 1 to mask channel 5 ALERT.
Channel 4 Alert Mask. Set to logic 1 to mask channel 4 ALERT.
Channel 3 Alert Interrupt Mask. Set to logic 1 to mask channel 3 ALERT.
Channel 2 Alert Mask. Set to logic 1 to mask channel 2 ALERT.
Channel 1 Alert Mask. Set to logic 1 to mask channel 1 ALERT.
sensing diodes (see the Typical Application Circuit ) or
it can measure the temperature of a discrete diode-
connected transistor.
The accuracy of the remote temperature measurements
depends on the ideality factor (n) of the remote “diode”
(actually a transistor). The MAX6697 is optimized for n
= 1.008. A thermal diode on the substrate of an IC is
normally a pnp with the base and emitter brought out
the collector (diode connection) grounded. DXP_ must
be connected to the anode (emitter) and DXN_ must be
connected to the cathode (base) of this pnp. If a sense
transistor with an ideality factor other than 1.008 is
used, the output data is different from the data obtained
with the optimum ideality factor. Fortunately, the differ-
ence is predictable. Assume a
FUNCTION
FUNCTION
Effect of Ideality Factor