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NE1617A
All information provided in this document is subject to legal disclaimers.
?NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 5  20 March 2012
18 of 30
NXP Semiconductors
NE1617A
Temperature monitor for microprocessor systems
11. Characteristics
 
[1]   The value of V
DD
 below which the internal A/D converter is disabled. This is designed to be a minimum of 200 mV above the power-on
reset. During the time that it is disabled, the temperature that is in the read temperature registers will remain at the value that it was
before the ADC was disabled. This is done to eliminate the possibility of reading unexpected false temperatures due to the A/D
converter not working correctly due to low voltage. In case of power-up (rising V
DD
), the reading that is stored in the read temperature
registers will be the default value of 0 癈. As soon as V
DD
 has risen to the value of UVLO, the ADC will function correctly and normal
temperatures will be read.
[2]   V
DD
 (rising edge) voltage below which the ADC is disabled.
[3]   V
DD
 (falling edge) voltage below which the logic is reset.
[4]   Address is read at power-up and at start of conversion for all conversions except the fastest rate.
[5]   Due to the bias current, any pull-up/pull-down resistors should be ?2 kW.
Table 13.   Characteristics
V
DD
= 3.0 V to 3.6 V; T
amb
= 0 ?/SPAN>C to +125 ?/SPAN>C; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
T
res
temperature resolution
1
-
-
癈
T
acc(loc)
local temperature accuracy
T
amb
= +60 癈 to +100 癈
-
< ?
?
癈
T
amb
= 0 癈 to +125 癈
-
< ?
?
癈
T
acc(rem)
remote temperature accuracy    T
remote
= +60 癈 to +100 癈
-
-
?
癈
T
remote
= -40 癈 to +125 癈
-
-
?
癈
V
th(UVLO)
undervoltage lockout threshold
voltage
[1]
V
DD
 supply
[2]
-
2.7
2.95
V
V
th(POR)
power-on reset threshold
voltage
V
DD
 supply (falling edge)
[3]
1.0
-
2.5
V
I
DD(AV)
average supply current
conversion rate = 0.25 per second
-
-
70
mA
conversion rate = 2 per second
-
-
180
mA
I
DD(stb)
standby supply current
SMBus inactive
-
3
10
mA
t
conv
conversion time
from STOP bit to conversion
complete; both channels
-
-
170
ms
E
f(conv)
conversion rate error
percentage error in programmed
rate
-30
-
+30
%
I
source
source current
remote sensor
HIGH level
-
100
-
mA
LOW level
-
10
-
mA
I
bias
bias current
ADD0, ADD1; momentary as the
address is being read
[4]
[5]
-
160
-
mA
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