as8510 austriamicrosystems, as8510 Datasheet - Page 13

• Manufacturer Part Number: as8510
• Description: Data Acquisition Device For Battery Sensors
• Manufacturer: austriamicrosystems

AS8510
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6.4.5 Internal (Programmable) Current Source for External Temperature Measurement
Table 19. External Temperature Measurement
Notes:
www.austriamicrosystems.com/AS8510
V
V
MAXETRMOD
MAXETSMOD
V
V
Symbol
I
I
CUROFF
T
CURON
MAXETR
MAXETS
1. Current value can be programmed in steps of 8mAmps from 0 to 256 mA 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
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.
K
_
CS
guaranteed by design and will not be tested in production.
Temperature coefficient of current source
Voltage on pin ETS for resistor sensor
Max. Voltage on pin ETS when PGA is
Max voltage on pin ETR when PGA is
5-bit current source enabled
5-bit current source disabled
Voltage on pin ETR
Parameter
bypassed
bypassed
4
5
3
1
3
2
5-bit programmable current source
Revision 3.4
Limited by leakage
Conditions
Min
0
1000
Typ
270
10
1000/G
1000/G
Max
1.22
1.22
320
Units
ppm
/ ºK
µA
mV
nA
13 - 46
V
V
V