ATA6602 ATMEL Corporation, ATA6602 Datasheet - Page 17
ATA6602
Manufacturer Part Number
ATA6602
Description
LIN and Microcontroller System-In-Package: LIN Transceiver, integrated 5V/50 mA voltage regulator, window watchdog and automotive AVR ATmega88 (8 kBytes Flash); green QFN48 package.
Manufacturer
ATMEL Corporation
Datasheet
1.ATA6602.pdf
(362 pages)
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3.3.18
4921C–AUTO–01/07
Temperature Monitor at Pin TEMP
Table 3-2.
In addition to the internal temperature monitoring of the voltage regulator, an additional sensor
measures the junction temperature and provides a linearized voltage at the TEMP pin. Together
with the analog functions of the microcontroller (for example, the analog comparator and the
Analog-to-Digital Converter (ADC)), this enables the application to detect overload conditions
and to take corresponding measures in order to prevent damage. An external capacitor buffers
the voltage due to the input current of the ADC.
The sensor itself is built out of three diodes which are supplied by an internal BIAS current in Pre
Normal Mode and Normal Mode. The typical voltage at T = 27°C is V
negative temperature coefficient of V
current source is switched off.
Figure 3-10. Temperature Monitor
Rwd_osc
120
k
10
51
91
Oscillator
Table of Watchdog Timings
Period
t
osc
12.5
22.4
2.6
29
/µs
t
113.7
Lead
Time
10.2
49.4
87.8
d
/ms
V
TEMP
Window
Closed
DD
17.92
t
TC,TEMP
2.08
23.2
1
10
/ms
= –5.05 mV/k. In silent and sleep mode the 20 µA
Open Window
t
18.82
24.36
2.18
10.5
2
/ms
20 µA
ATA6602/ATA6603
Trigger Period from
microcontroller
t
temp
25.45
32.94
wd
2.90
14.2
/ms
= 2.2V with a typical
Reset time
t
nres
0.41
1.96
3.52
4.55
/ms
17
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