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AS8515 bảng dữ liệu(PDF) 41 Page - ams AG

tên linh kiện AS8515
Giải thích chi tiết về linh kiện  Data Acquisition System with Power Management and LIN Transceiver for 12V Battery Sensor Applications
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AS8515 bảng dữ liệu(HTML) 41 Page - ams AG

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AS8515
Datasheet - AS8515 Bottom Die Overvi ew
Internal (Programmable) Current Source for External Temperature Measurement.
Notes:
1. Current value can be programmed through stop mode in steps of 8
μA from 0 to 256μA with a process error of 30%.
2. Temperature coefficient is not important since external temperature measurement is a 2 step measurement. The value specified is
guaranteed by design and will not be tested in production.
3. Maximum voltage on pin ETR (reference) can be calculated by given formula, where G is the gain of PGA (G=100).
4. Maximum voltage on pin ETR, if PGA is bypassed.
5. Maximum voltage on pin ETS, if PGA is bypassed.
CMREF Circuit (VCM).
Internal AVDD Power-on Reset.
Table 36. External Temperature Measurement
Symbol
Parameter
Conditions
Min
Typ
Max
Units
ICURON
5-bit current source enabled
1
5-bit programmable current source
0
270
320
µA
ICUROFF
5-bit current source disabled
Limited by leakage
10
nA
TK_CS
Temperature coefficient of current source
2
1000
ppm
/ ºK
VMAXETR
Voltage on pin ETR
3
1000/G
mV
VMAXETRMOD
Max voltage on pin ETR when PGA is
bypassed
4
1.22
V
VMAXETS
Voltage on pin ETS for resistor sensor
3
1000/G
V
VMAXETSMOD
Max. Voltage on pin ETS when PGA is
bypassed
5
1.22
V
Table 37. CMREF Circuit
Symbol
Parameter
Min
Typ
Max
Units
VVCM
Output voltage
1.6
1.7
1.8
V
CL
Load capacitance
100
nF
Table 38. Internal AVDD Power-on Reset
Symbol
Parameter
Min
Typ
Max
Units
VPORHIA
Power On Reset Threshold
2.2
2.4
2.6
V
tPORA
POR time - The duration from Power ON till
the time, internal Power On Reset signal
goes HIGH
1
1. POR pulse is always longer than tPORA whatever the slope of the supply.
1µs
IPORA
Current consumption in POR block
2
2. I
PORA can not be switched off.
1.5
µA



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