f75367 Feature Integration Technology Inc., f75367 Datasheet - Page 11

• Manufacturer Part Number: f75367
• Description: Temperature Sensor With I2c-sst Bridge
• Manufacturer: Feature Integration Technology Inc.

7. Register Description
7.1. Configuration Register  Index 01h
7-1
Bit
0
a ground plane under the tracks if possible. Do not route D+ & D- lines next to the deflection coil of the
CRT. And also don’t route the trace across fast digital signals which can easily induce bigger error.
Use wide tracks to minimize inductance and reduce noise pickup. 10 mil track minimum width and
spacing is recommended.
Try to minimize the number of copper/solder joints, which can cause thermocouple effects. Where
copper/solder joints are used, make sure that they are in both the D+ and D- path and at the same
temperature. Thermocouple effects should not be a major problem as 1
means that a copper-solder thermocouple exhibits 3µV/℃, and takes about 200µV of the voltage error at
D+ & D- to cause a 1℃ measurement error. Adding a few thermocouples causes a negligible error.
Place a 0.1µF bypass capacitor close to the VCC pin. In very noisy environments, place an external
2200pF input filter capacitors across D+, D- close to the F75367.
If the distance to the remote sensor is more than 8 inches, the use of twisted pair cable is recommended.
It will work up to around 6 to 12 feet.
Because the measurement technique uses switched current sources, excessive cable and/or filter
capacitance will affect the measurement accuracy. When using long cables, the filter capacitor may be
reduced or removed. Cable resistance can also induce errors. 1 Ω series resistance introduces about
0.5
MINIMUM
10MILS
10MILS
℃
er
ror.
T_START
Name
-
R/W
R/W
R/W Default
GND
DXP
DXN
GND
0
1
Reserved
Set one to enable startup of temperature monitoring operations; a zero
puts the part in standby mode.
11
10MILS
10MILS
Description
℃
corresponds to about 200µV
F75367
Feb..
. It
V0.11P
, 2008