MGA-22103 Datasheet, PDF (11/14 Pages) AVAGO TECHNOLOGIES LIMITED – 2.5-2.7 GHz WiMAX Power Amplifi er Module

Application Circuit MGA-22103
Vdd1
Vdd2
0.1 MF
100 pF
47 MF
10 MF
10 MF
100 pF
RF In
BCTRL
0.1 MF 100 pF 100 pF
1 RF In
2 GND
3 GND
4 BCTRL
100 pF
100 pF
GND 12
RF Out 11
GND 10
NC 9
RF Out
BSPLY BSW PAMOD
Using 3.3 V or 5 V Supply and connecting Vcc1, Vcc2, BSLPY and BCTRL
Vbat
Notes:
R1
BCTRL regulates the device current, thus R1 and R2 should have good
tolerance rating. If available, a voltage regulator is the preferred method
of bias.
R2
In this example we set R2 at 10 MOhm and solve for R1 with simple
voltage divider equation. Use high resistance values to limit leakage
Vcc1
Vcc2
BSPLY
BCTRL
current.
3.3 V Example:
V_BCTRL = ^R2 *V_BATT
R₁ + R₂
2.85 V = ^{10 M} *3.3 V
R₁ + 10 M
R₁ = 1. 58 M
R₂ = 10 M
Given:
V_BCTRL = 2.85 V
V_BAT = 3.3 V
R₂ = 10 M
R₁ = ?
5.0 V Example:
V_BCTRL = ^R2 *V_BATT
R₁ + R₂
2.85 V = ^{10 M} *5.0 V
R₁ + 10 M
R₁ = 7.54 M
R₂ = 10 M
Given:
V_BCTRL = 2.85 V
V_BAT = 5.0 V
R₂ = 10 M
R₁ = ?
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