SA58646 Datasheet, PDF (23/42 Pages) NXP Semiconductors – UHF 900 MHz transceiver IC

NXP Semiconductors
SA58646
UHF 900 MHz transceiver IC
Table 16. Carrier detection …continued
Select CAR_DET_LEV[4:0]
Bit 4 Bit 3 Bit 2 Bit 1
24
1
1
0
0
25
1
1
0
0
26
1
1
0
1
27
1
1
0
1
28
1
1
1
0
29
1
1
1
0
30
1
1
1
1
31
1
1
1
1
Bit 0
0
1
0
1
0
1
0
1
RSSI threshold detection voltage (V)
1.06
1.1
1.14
1.18
1.22
1.26
1.3
1.34
Table 17. Clock output divider
Select CLK_DIV[2:0]
Bit 2
Bit 1
1
0
0
2
0
0
3
0
1
4
0
1
5
1
0
6
1
1
Bit 0
0
1
0
1
0
1
Clock divider ratio
output disable
2
2.5
4
1
128
8.7 Data register 6
Table 18. Data register 6 (address 110h) bit description
Legend: * reset value.
Bit
Symbol
Value Description
15 to 13 PA_OUT[2:0]
Power amplifier output level. The power amplifier uses
2 bits to modify the output power. The PA is disabled for
value 000. Duplexer matching from 300 Ω to 50 Ω is
implemented with a parallel inductor and series C network.
To get the power at the antenna, the duplexer insertion loss
should be subtracted. At maximum power, the DC current
consumption is increased by 3 mA over the minimum
power current consumption.
010* The output power for a 50 Ω termination is specified in
Table 20.
12
TX_CP
TX charge pump current. The performance of the PLL
can be improved by increasing charge pump current.
0* 400 µA
1
800 µA
11
RX_CP
RX charge pump current. The performance of the PLL
can be improved by increasing charge pump current.
0* 400 µA
1
800 µA
SA58646_1
Product data sheet
Rev. 01 — 8 February 2007
© NXP B.V. 2007. All rights reserved.
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