SKY66111-11 Datasheet, PDF (6/14 Pages) Skyworks Solutions Inc. – Low-Power Bluetooth Low Energy Front-End Module for Range Extension Applications

DATA SHEET • SKY66111-11: LOW-POWER BLUETOOTH LOW ENERGY FEM
In many applications, a variable DC supply voltage may not be
available. The desired bias voltage can be generated by
connecting BIAS to the GPIO controlling CTX with a resistor (refer
to Figure 12). With no RF input, the BIAS pin draws approximately
10% of the main supply current. Toggling BIAS from the CTX GPIO
also causes the PA to turn off when CTX is pulled low, reducing
the RX and shutdown mode current.
Table 9 lists the relationship between bias voltage/current and
bias resistance.
2.5
25
IBIAS (mA)
2
ICC (mA)
20
1.5
15
1
10
0.5
5
0
0
0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3 3.3
VBIAS (V)
203199E-007
Figure 7. IBIAS and ICC vs VBIAS (VCC = 3.3 V, no RF)
Table 9. Bias Voltage and Current vs Bias Resistance (VCC = 3.3 V)
RBIAS (k)
VBIAS (V)
IBIAS (mA)
0
3.30
2.09
0.47
2.65
1.41
1
2.28
1.03
1.5
2.07
0.82
2.2
1.90
0.64
3.3
1.78
0.48
4.7
1.62
0.36
6.8
1.52
0.26
10
1.44
0.19
15
1.37
0.13
22
1.32
0.09
33
1.29
0.06
3.3
3
2.7
2.4
2.1
1.8
1.5
1.2
0 3 6 9 12 15 18 21 24 27 30 33
RBIAS (kΩ)
Figure 8. VBIAS vs RBIAS (Vcc = 3.3 V)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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February 22, 2016 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203199E