- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383289 > LT5526 (Linear Technology Corporation) High Linearity, Low Power Downconverting Mixer PDF資料下載
參數(shù)資料
| 型號： | LT5526 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | High Linearity, Low Power Downconverting Mixer |
| 中文描述： | 高線性度，低功耗下變頻混頻器 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大小： | 224K |
| 代理商： | LT5526 |
12
LT5526
5526f
through impedance-matching inductors. Each IF pin draws
about 7.5mA of supply current (15mA total). For optimum
single-ended performance, these differential outputs must
be combined externally through an IF transformer or
balun.
APPLICATIU
W
U
U
network, along with the impedance values listed in Table
4. As an example, at an IF frequency of 140MHz and R
L
=
200
(using a 4:1 transformer for T2),
n = R
IF
/R
L
= 574/200 = 2.87
Q =
√
(n – 1) = 1.368
X
C
= R
IF
/Q = 420
C = 1/(
ω
X
C
) = 2.71pF
C3 = C – C
IF
= 2.01pF
X
L
= R
L
Q = 274
L2 = L3 = X
L
/2
ω
= 156nH
Table 4. IF Differential Impedance (Parallel Equivalent)
FREQUENCY
OUTPUT REFLECTION COEFFICIENT
(MHz)
IMPEDANCE
70
575|| – j3.39k
140
574|| – j1.67k
240
572|| – j977
450
561|| – j519
750
537|| – j309
860
525|| – j267
1000
509|| – j229
1250
474|| – j181
1500
435|| – j147
MAG
0.840
0.840
0.840
0.838
0.834
0.831
0.829
0.822
0.814
ANGLE
–1.8
–3.5
–5.9
–11.1
–18.6
–21.3
–24.8
–31.3
–38.0
Low Cost Output Match
For low cost applications in which the required fractional
bandwidth of the IF output is less than 25%, it may be
possible to replace the output transformer with a lumped-
element network similar to that discussed earlier for the
RF input. This circuit is shown in Figure 11, where L11,
L12, C11 and C12 form a narrowband bridge balun. These
element values are selected to realize a 180
°
phase shift at
the desired IF frequency and can be estimated by using the
equations below. In this case, R
IF
is the mixer output
resistance and R
L
is the load resistance (50
).
Figure 10. IF Output Small-Signal Model
10
11
R
IF
574
5526 F10
0.7nH
L3
L2
0.7nH
C
0.7pF
LT5526
IF
–
IF
+
R
L
200
C3
10
11
575
C3
5526 F09
V
CC
L3
IF
OUT
T2
4:1
L2
V
CC
0.7pF
LT5526
IF
–
IF
+
Figure 9. IF Output with External Matching
An equivalent small-signal model for the output is shown
in Figure 10. The output impedance can be modeled as a
575
resistor in parallel with a 0.7pF capacitor. For most
applications, the bond-wire inductance (0.7nH per side)
can be ignored.
The external components, C3, L2 and L3 form an imped-
ance transformation network to match the mixer output
impedance to the input impedance of transformer T2. The
values for these components can be estimated using the
same equations that were used for the input matching
相關PDF資料 |
PDF描述 |
|---|---|
| LT5526EUF | High Linearity, Low Power Downconverting Mixer |
| LT6551 | 3.3V Triple and Quad Video Amplifiers |
| LT6550IMS | 3.3V Triple and Quad Video Amplifiers |
| LT6550 | LCD MOD 24X2 CHAR STN SILVER |
| LT6550CMS | 3.3V Triple and Quad Video Amplifiers |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LT5526EUF | 制造商:Linear Technology 功能描述:Up/Down Conv Mixer 5V 2GHz 16-Pin QFN EP |
| LT5526EUF#PBF | 功能描述:IC MIXER DOWNCONVERTER LP 16QFN RoHS:是 類別:RF/IF 和 RFID >> RF 混頻器 系列:LT5526 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:100 系列:- RF 型:W-CDMA 頻率:2.11GHz ~ 2.17GHz 混頻器數(shù)目:1 增益:17dB 噪音數(shù)據(jù):2.2dB 次要屬性:- 電流 - 電源:11.7mA 電源電壓:2.7 V ~ 3.3 V 包裝:托盤 封裝/外殼:12-VFQFN 裸露焊盤 供應商設備封裝:12-QFN-EP（3x3） |
| LT5526EUF#TR | 制造商:Linear Technology 功能描述:Up/Down Conv Mixer 5V 2GHz 16-Pin QFN EP T/R |
| LT5526EUF#TRPBF | 功能描述:IC MIXER DOWNCONV LP 16QFN RoHS:是 類別:RF/IF 和 RFID >> RF 混頻器 系列:LT5526 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:100 系列:- RF 型:W-CDMA 頻率:2.11GHz ~ 2.17GHz 混頻器數(shù)目:1 增益:17dB 噪音數(shù)據(jù):2.2dB 次要屬性:- 電流 - 電源:11.7mA 電源電壓:2.7 V ~ 3.3 V 包裝:托盤 封裝/外殼:12-VFQFN 裸露焊盤 供應商設備封裝:12-QFN-EP（3x3） |
| LT5526EUFPBF | 制造商:Linear Technology 功能描述:Downconverter Mixer,LT5526 2GHz QFN |
發(fā)布緊急采購，3分鐘左右您將得到回復。