MAX6689UP9A+ Maxim Integrated Products, MAX6689UP9A+ Datasheet - Page 17

• Manufacturer Part Number: MAX6689UP9A+
• Description: IC TEMP MONITOR 7CH 20TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX6689UP9A+

• 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: +/- 1 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

Use a twisted-pair cable to connect the remote sensor
for remote-sensor distances longer than 8in or in very
noisy environments. Twisted-pair cable lengths can be
between 6ft and 12ft before noise introduces excessive
errors. For longer distances, the best solution is a
shielded twisted pair like that used for audio micro-
phones. For example, Belden #8451 works well for dis-
tances up to 100ft in a noisy environment. At the
device, connect the twisted pair to DXP and DXN and
the shield to GND. Leave the shield unconnected at the
remote sensor. For very long cable runs, the cable’s
parasitic capacitance often provides noise filtering, so
the 2200pF capacitor can often be removed or
reduced in value. Cable resistance also affects remote-
sensor accuracy. For every 1Ω of series resistance the
error is approximately +1/2°C.
Twisted-Pair and Shielded Cables
7-Channel Precision Temperature Monitor
______________________________________________________________________________________
PROCESS: BiCMOS
TOP VIEW
DXN1
DXN2
DXN3
DXN4
DXN5
DXP1
DXP2
DXP3
DXP4
DXP5
10
1
2
3
4
5
6
7
8
9
QSOP/TSSOP
+
MAX6689
Pin Configuration
Chip Information
20
19
18
17
16
15
14
13
12
11
GND
SMBCLK
SMBDATA
ALERT
V
OVERT
N.C.
STBY
DXP6
DXN6
CC
17