User manual

DIGITAL-LOGIC AG MSM800SEV/SEL/BEV/XEV/XEL Detailed Manual V1.5
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2.13. Battery Lifetime
Note...
The RTC back-up battery is assembled onboard only for the MSM800SEV/BEV/XEV systems.
Battery specifications Lowest temp.
-40°C
Nominal temp.
+20°C
Highest temp.
+85°C
Manufacturer pba
Type ER10280
Capacity versus temp. 10uA 430mAh 400mAh 300mAh
Voltage versus temp. 10uA 3.6V 3.6V Ca. 3.6V
Nominal values 3.6V / 400mAh @ 0.5mA / -55°C...~+85°C
Information is taken from the datasheet.
Product
Temperature
°C
Battery voltage
V
VCC (+5)
switched ON
µA
VCC (+5V)
switched off
µA
Battery current +25°C 3.6 < 1 < 4
Battery lifetime +25°C > 5 years > 5 year
2.13.1. External Battery Assembly:
Note...
The MSM800SEL/BEL/XEL versions require this.
The external battery must be a lithium 3.6Volt with a capacity from 400-800mAh.
If the customer wants to connect an external battery (check for the appropriate connector in chapter 6), some
precautions must be taken:
 Do not use a rechargeable battery – the battery is prohibited from charging.
 The RTC device defines a voltage level of 3-3.6V, so use an external battery within this range
(inclusive of the diode which is already assembled onboard).
Attention!
For systems that already have an onboard battery (MSM800SEV/BEV/XEV): if an external battery
is to be connected, then the onboard battery must be removed first.