SKY66112-11_17 Datasheet, PDF (7/14 Pages) Skyworks Solutions Inc. – 2.4 GHz ZigBee/Thread/Bluetooth Smart Front-End Module

DATA SHEET • SKY66112-11: ZIGBEE/THREAD/BLUETOOTH SMART FEM
Effect of VCC1
VCC1 supplies the LNA and the first stage of the PA. It has a nominal level of 1.8 V and typically draws 10 to 20 mA in TX mode and 3.5 mA
in RX mode. Raising Vcc1 to 3.0 V increases RX and TX small-signal gain by ~0.3 dB and RX P1dB by ~1 dB. However, it also increases
TX Icc by 1 to 30 mA depending on input power. To avoid high TX Icc, it is recommended to keep PIN at or below -2 dBm.
Effect of VCC1 = 3 V, TX-HP Mode
24
20
16
12
8
4
0
-20
POUT @ 1.8V
-16
POUT @ 3.0V
Icc @ 1.8V
Icc @ 3.0V
240
200
160
120
80
40
0
-12
-8
-4
0
4
Input Power (dBm)
Figure 7. Effect of Raising VCC1
(VCC2 = VDD = 3.0 V, f = 2440 MHz, TX-HP Mode)
203225-007
Effect of VCC1 = 3 V, RX-LNA Mode
SSG @ 1.8V
13
SSG @ 3V
P1dB @ 1.8V
P1dB @ 3V
-7
12.5
-7.5
12
-8
11.5
-8.5
11
-9
2400 2410 2420 2430 2440 2450 2460 2470 2480
Frequency (MHz)
203225-008
Figure 8. Effect of Raising VCC1
(VCC2 = VDD = 3.0 V, PIN = -25 dBm, RX-LNA Mode)
Effect of VCC2
Vcc2 supplies the output stage of the PA. The level of Vcc2 directly controls the saturated TX output power and this supply draws the
majority of the current in TX mode.
POUT vs. VCC2 and PIN, TX Mode
24
22
20
18
16
14
12
10
8
6
0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3 3.3 3.6
Vcc2 (V)
Figure 9. POUT vs. VCC2 and PIN
(VCC1 = 1.8 V, VDD = 3.0 V, f = 2440 MHz)
LP -4dBm
LP -2dBm
LP 0dBm
HP -4dBm
HP -2dBm
HP 0dBm
203225-009
Icc (Total) vs VCC2 and PIN, TX Mode
140
120
100
80
60
40
20
0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3 3.3 3.6
Vcc2 (V)
Figure 10. ICC vs. VCC2 and PIN
(VCC1 = 1.8 V, VDD = 3.0 V, f = 2440 MHz)
LP -4dBm
LP -2dBm
LP 0dBm
HP -4dBm
HP -2dBm
HP 0dBm
203225-010
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
203225L • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • March 14, 2017
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