RF212 データシートの表示（PDF） - Unspecified
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RF212 Datasheet PDF : 9 Pages
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Image-Reject Front End
RF212
Table 1. RF212 Dual-Band Selection
BANDSEL1, pin 14
0
1
Mode
EGSM900
DCS1800
BANDSEL1, pin 14
0
0
1
1
Table 2. RF212 Tri-Band Selection
BANDSEL2, pin 15
0
1
0
1
Mode
EGSM900
DCS1800
PCS1900
Pin #
1
Name
NC
2
GND
3
GND
4
LNA900IN
5
VCC
6
VCC
7
GAINSEL
8
LNA1800IN
9
GND
10 ENA
Table 3. RF212 Dual-Band Device Signal Description
Description
No connect (recommend connecting to
ground)
Ground
Ground
900 MHz LNA input
Supply
Supply
LNA gain select
1800 MHz LNA input
Pin #
11
Name
NC
12 LOGND
13 LOIN
14 BANDSEL1
15 GND
16
IFOUT−
17 IFOUT+
18 STEPSEL
Ground
Device enable, active high
19 GND
20 VCC
Description
No connect (recommend connecting to
ground)
LO input ground
LO input
Band select control
Ground
Mixer negative output
Mixer positive output
Gain step select. STEPSEL= 0 selects a
12 dB gain step; STEPSEL = 1 selects a
20 dB gain step
Ground
Supply
Pin #
1
Name
NC
2
GND
3
GND
4
LNA900IN
5
VCC
6
VCC
7
GAINSEL
8
LNA1800IN
9
LNA1900IN
10 ENA
Table 4. RF212 Tri-Band Device Signal Description
Description
No connect (recommend connecting to
ground)
Ground
Ground
900 MHz LNA input
Supply
Supply
LNA gain select
1800 MHz LNA input
Pin #
11
Name
NC
12 LOGND
13 LOIN
14 BANDSEL1
15 BANDSEL2
16
IFOUT−
17 IFOUT+
18 STEPSEL
1900 MHz LNA input
Device enable, active high
19 GND
20 VCC
Description
No connect (recommend connecting to
ground)
LO input ground
LO input
Band select control 1
Band select control 2
Mixer negative output
Mixer positive output
Gain step select. STEPSEL= 0 selects a
12 dB gain step; STEPSEL = 1 selects a
20 dB gain step
Ground
Supply
100956A
Conexant – Preliminary
3
May 18, 2000
Proprietary Information and Specifications are Subject to Change
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