Tyco Electronics A1029, Руководство пользователя

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GPS Receivers A1029
V3.2 - 02/06 User’s Manual Page 29 of 43
7 Electrical Characteristics
7.1 Operating Conditions
Pin Description Min Typical Max
A B
8 9 Vcc 3.0V 3.3V 3.6V
Current draw (without active Antenna) 50mA
Input current in standby mode 30µA
1 3
1PPS (1 pulse per second), reference GPS
time (active and passive antenna) +120ns
+90ns
19 23
VANT (active antenna supply voltage)
Antenna current Vcc-0.5V 5.2V
50mA
22 na ANT (antenna pin) Z
0
=50 Ω
24 24
GS (gain select for LNA), input pin
GS high (Low gain – 4dB)
GS low (high gain – 14dB)
Vcc-0.6V
Vcc
0.6V
25 22
ANTSTAT (antenna sensor output) @ 1mA
current source (antenna current values are
typical values)
High at antenna current from 9 to 16mA
Low at antenna current <9mA or >16mA
Vcc-0.5V
0
Vcc
0.5V
Output pins
VOH
VOL
Vcc-0.8V
0.4V
Input pins
VIH
VIL
0.7Vcc
0.3Vcc
Table 9: Operating Conditions
7.2 Absolute Maximum Ratings
Pin Description Min Max
A B
8 9 Vcc -0.3V 3.6V
Current Antenna, external power supply 50mA
Applied voltage to all input pins excluding VCC, VANT -0.3V Vcc+0.3V
max. 3.6V
Table 10: Absolute maximum ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause per-
manent damage to the device. This is a stress rating only. Functional operation of
the device at these or any other conditions beyond those indicated in the opera-
tional sections of this specification is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.