Integration Manual

HMS1 Hardware Interface Description
Confidential / Preliminary
s
HMS1_HD_V01.62 Page 24 of 39 2006-08-21
5. Electrical, Reliability and Radio Characteristics
5.1. Absolute Maximum Ratings
The absolute maximum ratings stated in Table 6 are stress ratings under any conditions.
Stresses beyond any of these limits will cause permanent damage to HMS1. The power
supply shall be compliant with the SELV safety standard defined in EN60950. The supply
current must be limited according to
Table 6.
Table 6: Absolute maximum ratings
Parameter Min Max Unit
Supply voltage BATT+ -0.3 +3.7 V
Voltage at digital pins in POWER DOWN mode -0.3 +0.3 V
Voltage at digital pins in normal operation -0.3 +3.0 V
Voltage at analog pins in POWER DOWN mode -0.3 +0.3 V
Voltage at analog pins in normal operation -0.3 +3.0 V
VUSB_IN -0.3 +3.5 V
USB_DP, USB_DN -0.3 +5.5 V
VDDLP -0.3 +3.25 V
5.2. Operating Temperatures
Table 7: Ambient temperature according to IEC 60068-2 (without forced air circulation)
Parameter Min Typ Max Unit
Normal operation 0 +25 +55 °C