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Electrical Characteristics
Vmin
2
1
VBATT
3.2
1:
This value has to be guaranteed during the burst (with TBDA Peak in GSM or GPRS mode)
2:
The maximum operating Voltage Stationary Wave Ratio (VSWR) is 1.5:1.
Note:
When powering the WISMO228 with a battery, the total impedance (battery + protections + PCB)
should be less than 150m
Pin Description
Pin Numbers
29,30
20,22,23,26,28,31
Application
The reject filter can be connected between VBATT and the supply sources if the supply source is
noisy.
Caution: If the reject filter (C1+L1+C2) is an option, a capacitor (i.e. C2) is mandatory close to the VBATT.
The following tables list the recommended components to use in implementing the reject filter.
WA_DEV_W228_PTS_002
Table 4.
Input Power Supply Voltage
Vnom
Vmax
3.6
4.8
TBD
Ω
.
Table 5.
Power Supply Pin Description
VBATT
GND
Figure 6. Reject Filter Diagram
Rev 001
Product Technical Specification &
Customer Design Guidelines
ITYP
Imax
Ripple max (Uripp)
TBD
TBD
Signal
Page 28 of 108
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