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參數(shù)資料
| 型號(hào)： | RF212-11 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Image-Reject Front End for Dual or Tri-Band GSM Applications |
| 中文描述： | 鏡像抑制前端雙或三頻GSM應(yīng)用 |
| 文件頁數(shù)： | 6/9頁 |
| 文件大?。?/td> | 89K |
| 代理商： | RF212-11 |
RF212
Image-Reject Front End
6
May 24, 2000
Conexant
100780D
Proprietary Information and Specifications are Subject to Change
Table 7. RF212 Electrical Specifications (3 of 3)
(T
A
= 25
°
C, Vcc = 2.7 V,
f
IF
= 400 MHz,
Plo
=
10 dBm)
Parameter
Symbol
Test Condition
Mn
Typical
Max
Units
PCS1900 Mode (for tri-band device only) (continued)
Input 1 dB compression point
high gain mode
low gain mode
23
20
–20
–16
dBm
dBm
Input third order intercept point
12
dBm
Differential IF shunt output resistance
2
k
Image rejection:
f
IF
= 400 MHz
f
IF
= 350 or 450 MHz
35
25
40
dB
dB
Local Oscillator (LO)
LO frequency
1275
1640
MHz
LO input return loss (with external matching circuit)
f
IF
= 400 MHz
10
dB
LO input power
P
LO
15
10
5
dBm
Control Signals (All Modes)
Digital input voltages (ENA, GAINSEL, BANDSEL1,
BANDSEL2, and STEPSEL)
V
IH
V
IL
Vcc –
0.4
0.4
V
V
Enable time
t
ON
10
μ
s
Bandselect switching time
15
μ
s
Note 1
: Assumes
5 dBm@ 915 MHz blocker at the antenna input attenuated by 17 dB.
Note 2
: Assumes
12 dBm@ 1785 MHz blocker at the antenna input attenuated by 10 dB.
Note 3
: Assumes
12 dBm@ 1910 MHz blocker at the antenna input attenuated by 10 dB.
LNA900IN
LNA1800IN
LNA1900IN
GAINSEL
ENABLE
LOIN
IFOUT-
IFOUT+
Bias
EGSM Rx filter
DCS Rx Filter
BANDSEL1
BANDSEL2
STEPSEL
Control
7
4
8
9
10
19
13
18
15
14
16
17
20
6
5
2
3
12
Vcc
22 pF
22 pF
2000
10
10
2000
2000
2000
2000
47pF
12 nH
22 pF
4.7 nH
27 pF
22 pF
L1
82 nH
L2
82 nH
2.2 F
10 pF
22 pF
100 pF
100 pF
12 pF
1.5 pF
3.0 nH
PCS Rx Filter
1.2 pF
3.0 nH
to
IF SAW
match
2 K || (L1+L2)
differential
C903
Figure 3. Typical RF212 Application Circuit
(for dual-band device, ground pins 9 and 15)
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