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SA1920 Datasheet, PDF (5/36 Pages) NXP Semiconductors – Dual-band RF front-end
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Philips Semiconductors
Dual-band RF front-end
Product specification
SA1920
Table 1. POWER DOWN CONTROL
For Applications Not Using a Frequency Doubler, each state is
defined as follows:
Control State
(Hi/Lo, Syn On, Rx On, Tx On, Strong Signal, X2
ON)
x000xx Sleep
010000 Low-Band LO Buffer on
011000 Low-Band Receive Normal
011010 Low-Band receive Strong Signal
011100 Low-Band Transmit (Analog only)
DOUBLER
Off
Off
Off
Off
Off
LO BUFFER
High Low
Band Band
Off
Off
Off
On
Off
On
Off
On
Off
On
010100 N/A
Off
Off
On
110000 High-Band LO Buffer On
Off
On
Off
111000 High-Band Receive Normal
Off
On
Off
111010 High-Band Receive Strong Signal
Off
On
Off
110100 N/A
Off
On
Off
LNA
High Low
Band Band
MIXER
High Low
Band Band
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
On
Off
Off
Off
On
Off
On
Off
On
High Bias
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
On
Off
Off
Off
On
Off
Off
Off
Off
Off
TX MIXER
DRIVER
High Low
Band Band
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
On
Off
Off
Off
Off
Off
Off
On
Off
For Applications Using a Frequency Doubler, each state is
defined as follows:
DOUBLER
Control State
(Hi/Lo, Syn On, Rx On, Tx On, Strong Signal, X2
ON)
x000xx Sleep
Off
010000 Transmit (Low and High Band)
Off
011000 Low-Band Receive Normal
Off
011010 Low-Band Receive Strong Signal
Off
011110 Low-Band Transmit (Analog only)
Off
LO BUFFER
High Low
Band Band
Off
Off
Off
On
Off
On
Off
On
Off
On
010100
010001
011001
011011
011111
Low-Band Transmit (GSM)
Transmit (Low and High Band)
Low-Band Receive Normal
Low-Band Receive Strong Signal
Low-Band Transmit(Analog only)
Off
Off
On
On
Off
On
On
Off
On
On
Off
On
On
Off
On
111001 High-Band Receive Normal
On
On
On
111011 High-Band Receive Strong Signal
On
On
On
110101 High-Band Transmit (GSM)
On
On
On
LNA
High Low
Band Band
MIXER
High Low
Band Band
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
On
Off
Off
Off
On
Off
On
Off
On
High Bias
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
On
Off
Off
Off
On
Off
On
Off
On
High Bias
On
Off
On
Off
Off
Off
On
Off
Off
Off
Off
Off
TX MIXER
DRIVER
High Low
Band Band
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
NOTE:
“0” is low logic state; “1” is high logic state.
1999 Mar 02
5
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