ADT7473 Analog Devices, Inc., ADT7473 Datasheet - Page 14

• Manufacturer Part Number: ADT7473
• Description: Dbcool Remote Thermal Monitor And Fan Controller
• Manufacturer: Analog Devices, Inc.

ADT7473
V
A
low limit
causes th
can also generate
Register 0x46 V
Register 0x47 V
Table 7 shows the
codes of the 10-bi
When the ADC is r
in
me
ADDITIONAL
M
A n
o
Turn-Off Averaging
F
16 r
averaged before
fast
Reg
r
eading 16 times faster (711 µs), but
ffer the system designer increased f
or each voltage measurement read om a value register,
ssoci
CCP
put in 711 µs and averages 16 conv
EASUREMENTS
asurement takes nominally 11.38 s.
umber of other functions are ava
er conversio
eadings have actually been mad
ister 2 (0x73) turns averaging of This effectively gives a
LIMIT REGISTERS
ated wi
e approp
regi
ster. Exceeding the progra
th the V
ns are needed, settin
CC
CC
being placed into th
ADC FUNCTIONS FOR VOLTAGE
SMBALERT
t ADC.
riate status bit to b
P
P
input ranges of th
Low Limit = 0x0
High Limit = 0xF
unning, it samples a
CCP
measureme t channel is a high and
interr
e in
f.
0 default
e analog inputs an
fr
g Bi
e value register. W
e set. Exce
upts.
ilab
lexi
th
F default
ersio
m
n
e reading may be noisier.
ternally and the results
mmed
nd converts a vol
bility.
t 4 of Configura
le on the ADT7473 to
ns to reduce noise; a
high or low limit
eding ei
d output
ther limit
hen
tion
tage
Rev. A | Page 14 of 76
Bypass Voltage Input Attenuator
Set
attenuati
to
v
ra
Single-Chann
S
ADT7473 in
m
c
in u
se
b e r
Table 6. Pro
Bits [7:5] Reg
001
010
101
110
1 11
C n
Bit 4 = 1; aver
B
B
TACH1 Minimum High Byte Register (0x55)
Bits [
oltage measurement inputs fo
hannel only. If the internal AD
etting Bit 6 of Configuration R
yt egister (0x55).
it 5 = 1; bypass input attenuators.
it 6 = 1; single-channel conver
o figuration Register 2 (0
nge of the ADC without the a
ode, the ADT7473 can be ma
p t is read every 711 µs. The
lected by writing to Bits [7:5] of the TACH1 minimum high
directly connect external sen
ting Bit 5 of Configuration Register 2 (0x73) removes the
7:5] select ADC channel f
on circuitry from the
to single-channel A
gramming Single-
. 0x55
aging off.
el ADC Conve
V
rsion
x73)
r other applicat
or single-chann
ap
sors or to resc
de to read a sin
ttenuators is 0
t m
T7473 clock is
Channel ADC
egister 2 (0x7
DC conversio
CCP
propriate AD
ode.
Channel Selected
V
V
Remote 1 temperature
Local temperature
Remote 2 temperature
input. This al
CCP
CC
ale the analog
3) places the
n mode. In this
ions. The input
V to 2.25 V.
gle voltage
el convert mode.
used, the selected
C channel is
Mode
lows the user