RF2689 Ver la hoja de datos (PDF) - RF Micro Devices
Número de pieza
componentes Descripción
Lista de partido
RF2689 Datasheet PDF : 20 Pages
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Preliminary
RF2689
Mode Control
Logic
EN RX
Chip Enable
If EN =0 then the whole IC is powered down
Mode Control Truth Table
Mode
Power Down
GSM/DCS RX Warm-Up
GSM/DCS RX
W-CDMA RX Warm-Up
W-CDMA RX
EN RX
0
1
1
1
1
Mode B
X
0
1
0
1
Mode A
X
1
1
0
0
Auto Calibration Mode
The filters are automatically tuned when the CALEN pin goes high. The filters are reset to a nominal value whenever the
CALEN pin goes low. The auto calibration circuitry is independent of the “Mode A/B” and the EN RX control pins.
The EN RX and CALEN pins can be connected together if desired.
Truth Table
Mode
W-CDMA GSM Input Amp Fixed
Input Amp & 1st Mixer Divider
GSM
Divider
Second
Dividers
VGA
Demod Baseband
& Filters
Power Down
0
0
0
0
0
0
0
0
GSM/DCS RX Warm-Up
0
0
1
0
0
0
0
0
7
(div 2)
(div 2)
(div 12)
GSM/DCS RX
0
1
1
1
1
1
1
1
(div 2)
(div 2)
(div 12)
(250 kHz)
W-CDMA RX Warm-Up
0
0
1
0
1
0
0
0
(div 2)
(div 4)
W-CDMA RX
1
0
1
0
0
1
1
1
(div 2)
(div 4)
(2.5 MHz)
Rev A4 010815
7-43
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