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TCM4400E Datasheet, PDF (53/64 Pages) Texas Instruments – GSM/DCS BASEBAND AND VOICE A/D AND D/A RF INTERFACE CIRCUIT | |||
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TCM4400E
GSM/DCS BASEBAND AND VOICE A/D
AND D/A RF INTERFACE CIRCUIT
SLWS082A â JULY 1999 â REVISED MARCH 2000
PRINCIPLES OF OPERATION
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ1111110123456789102345ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃVÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃD0000000011111111LGÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃT3abÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃVlDeL00001111000011112ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃG02. ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃDVoDwÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ0011001100110011LnGl1iÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃnkVÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃDPL0101010101010101GGÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃA0 GÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃRaEinLÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃAâââââââââT0123456654321666IVdddddddÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃdddddddddBBBBBBBEBBBBBBBBBGÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃAINÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ
VOLCTL (0â2):
Volume control (0, â6 ,â12, 18, â24, Mute), see Table 21.
Table 21. Volume Control Gain Settings
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ VOLCTL2 VOLCTL1 VOLCTL0 RELATIVE GAIN
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ 0
0
1
0
0 dB
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ 1
1
1
0
â6 dB
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ 2
0
0
0
â12 dB
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ 3
1
0
0
â18 dB
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ 4
0
1
1
â24 dB
5
1
0
1
Mute
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ 6
0
0
1
Mute
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ 7
1
1
1
Mute
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