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參數(shù)資料
| 型號： | RF212-21 |
| 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)： | 5/9頁 |
| 文件大?。?/td> | 89K |
| 代理商： | RF212-21 |
Image-Reject Front End
RF212
100956A
May 18, 2000
Conexant – Preliminary
5
Proprietary Information and Specifications are Subject to Change
Table 7. RF212 Electrical Specifications (2 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
DCS1800 Mode
Supply current:
Enable mode
Sleep mode
ENA = 1
ENA = 0
19
30
mA
μ
A
RF input frequency
1805
1880
MHz
IF frequency
350
400
450
MHz
LO to RF input isolation
30
dB
Input impedance
50
Power gain (for 2 k
differential output impedance):
High gain mode
Low gain mode 1
Low gain mode 2
Gain step 1
Gain step 2
Temperature coefficient
Gain variation versus frequency
G
MAX
1
G
MIN
1
G
MIN
2
G
STEP
1
G
STEP
2
F
TC
1
GAINSEL = 0
GAINSEL = 1, STEPSEL = 1
GAINSEL = 1, STEPSEL = 0
20
–22
–14
22
2
10
–20
–12
–0.02
25
–18
–10
1.2
dB
dB
dB
dB
dB
dB/
°
C
dB
Noise figure:
High gain
Low gain mode 1
Low gain mode 2
GAINSEL = 0
GAINSEL = 1, STEPSEL = 1
GAINSEL = 1, STEPSEL = 0
3.5
16.5
11
4.5
dB
dB
dB
Noise figure degradation with blocker:
High gain
22 dBmblocker,
GAINSEL = 0 (Note 2)
1.6
dB
Input 1 dB compression point
IP
1
D
B
high gain mode
low gain mode
23
20
–20
–16
dBm
dBm
Input third order intercept point
IP3
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
PCS1900 Mode (for tri-band device only)
Supply current:
Enable mode
Sleep mode
ENA = 1
ENA = 0
19
30
mA
μ
A
RF input frequency
1930
1990
MHz
IF frequency
350
400
450
MHz
LO to RF input isolation
30
dB
Input impedance
50
Power gain (for 2 k
differential output impedance):
High gain mode
Low gain mode 1
Low gain mode 2
Gain step 1
Gain step 2
Temperature coefficient
Gain variation versus frequency
G
MAX
1
G
MIN
1
G
MIN
2
G
STEP
1
G
STEP
2
F
TC
1
GAINSEL = 0
GAINSEL = 1, STEPSEL = 1
GAINSEL = 1, STEPSEL = 0
20
–22
–14
22
2
10
–20
–12
–0.02
25
–18
–10
1.2
dB
dB
dB
dB
dB
dB/
°
C
dB
Noise figure:
High gain
Low gain mode 1
Low gain mode 2
GAINSEL = 0
GAINSEL = 1, STEPSEL = 1
GAINSEL = 1, STEPSEL = 0
3.5
16.5
11
4.5
dB
dB
dB
Noise figure degradation with blocker:
High gain
22 dBmblocker,
GAINSEL = 0 (Note 3)
1.6
dB
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