198
9151AINDCO07/09
ATA8742
29.4 System and Reset Characterizations
Notes: 1. Values are guidelines only.
2. This is the limit to which VDD can be lowered without losing RAM data
Note:
1. V
BOT
may be below nominal minimum operating voltage for some devices. For devices where
this is the case, the device is tested down to V
CC
= V
BOT
during the production test. This guar-
antees that a Brown-out Reset will occur before V
CC
drops to a voltage where correct
operation of the microcontroller is no longer guaranteed.
29.5 ADC Characteristics Preliminary Data
Table 29-4. Reset, Brown-out and Internal Voltage Reference Characteristics
(1)
Symbol
Parameter
Condition
Min
Typ
Max
Units
V
HYST
Brown-out Detector Hysteresis
100
250
mV
V
RAM
2.
RAM Retention Voltage
(1)
50
mV
t
BOD
Min Pulse Width on Brown-out Reset
2
ns
V
BG
Bandgap reference voltage
V
C C
= 2.7V, T
A
= 25癈
1.0
1.1
1.2
V
t
BG
Bandgap reference start-up time
V
C C
= 2.7V, T
A
= 25癈
40
70
祍
I
BG
Bandgap reference current consumption
V
C C
= 2.7V, T
A
= 25癈
10
礎
Table 29-5. BODLEVEL Fuse Coding
(1)
BODLEVEL [2..0] Fuses
Min V
BOT
Typ V
BOT
Max V
BOT
Units
111
BOD Disabled
110
1.8
V
101
2.7
100
4.3
011
2.3
010
2.2
001
1.9
000
2.0
Table 29-6. ADC Characteristics, Single Ended Channels. -40?/SPAN>C - 125?/SPAN>C
Symbol Parameter
Condition
Min
Typ
Max
Units
Resolution
Single Ended Conversion
10
Bits
TUE
Absolute accuracy (Including
INL, DNL, quantization error,
gain and offset error)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200 kHz
2.0
4.0
LSB
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200 kHz
Noise Reduction Mode
2.0
4.0
LSB
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