Results
ACPM-7886 delivers good performance for TD-SCDMA
in the 2010 – 2025MHz frequency band see figures 10,
11, and 12. At Vdd of 3.5V, Vdd2 of 2.85 and Vcntl of
2V and Pout of 28dBm this device produces efficiency
of 40% and ACLR1/ACLR2 of 41dBc and 56 dBc
respectively.
0
2015 MHz ACLR1
2015 MHz ACLR2
-10
-20
-30
-40
-50
-60
-70
In normal CDMA or WCDMA systems, receiver
sensitivity is greatly affected by the TX power leakage,
thus the transmit off power is of great importance.
Figure 9 shows transmit off power of -83dBm which
results in 107dBc of dynamic range.
0
2
4
6
8
10 12 14 16 18 20 22 24 26 28 30
Pout (dBm)
Figure 10. ACLR vs. Pout at 2015 MHz.
60
2015 MHz
50
40
30
20
10
0
0
2
4
6
8
10 12 14 16 18 20 22 24 26 28 30
Pout (dBm)
Figure 11. PAE vs. Pout at 2015 MHz.
Figure 9. Transmit Off Power.
29
27
25
23
21
19
2015 MHz
17
15
0
2
4
6
8
10 12 14 16 18 20 22 24 26 28 30
Pout (dBm)
Figure 12. Gain vs. Pout at 2015 MHz.
13
AVAGO [ AVAGO TECHNOLOGIES LIMITED ]
