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參數(shù)資料
| 型號： | MAX2680EUT-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 衰減器 |
| 英文描述： | 400MHz to 2.5GHz, Low-Noise, SiGe Downconverter Mixers |
| 中文描述： | RF/MICROWAVE DOWN CONVERTER |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 126K |
| 代理商： | MAX2680EUT-T |
M
Power-S upply Layout
To minimize coupling between different sections of the
IC, the ideal power-supply layout is a star configuration
with a large decoupling capacitor at a central V
CC
node. The V
CC
traces branch out from this central
node, each going to a separate V
CC
node on the PC
board. At the end of each trace is a bypass capacitor
that has low ESR at the RF frequency of operation. This
arrangement provides local decoupling at the V
CC
pin.
At high frequencies, any signal leaking out of one sup-
ply pin sees a relatively high impedance (formed by the
V
CC
trace inductance) to the central V
CC
node, and an
even higher impedance to any other supply pin, as well
as a low impedance to ground through the bypass
capacitor.
Impedanc e-Matc hing Network Layout
The RFIN and IFOUT impedance-matching networks are
very sensitive to layout-related parasitics. To minimize
parasitic inductance, keep all traces short and place
components as close as possible to the chip. To mini-
mize parasitic capacitance, use cutouts in the ground
plane (and any other plane) below the matching network
components. However, avoid cutouts that are larger
than necessary since they act as aperture antennas.
400MHz to 2.5GHz, Low-Noise,
S iGe Downc onverter Mixers
10
______________________________________________________________________________________
Table 3. IFOUT Port Impedance
803-j785
960-j372
MAX2680
186-j397
FREQUENCY
746-j526
934-j373
MAX2681
161-j375
578-j299
670-j216
MAX2682
175-j296
Table 4. IF Output Impedance-Matching
Components
330nH
390nH
L1
82nH
FREQUENCY
15pF
39pF
C2
3pF
Open
250
R1
Open
70MHz
240MHz
PART
45MHz
70MHz
240MHz
MATCHING
COMPONENT
45MHz
MAX2680
MAX2681
MAX2682
LO
C3
6
5
4
SHUTDOWN
CONTROL
1
SHDN
V
CC
RF
INPUT
LO
INPUT
C1
IFOUT
2
Z
2
Z
3
Z
1
3
GND
RFIN
THE VALUES OF MATCHING COMPONENTS C2, L1, R1, Z1, Z2, AND Z3 DEPEND ON THE IF AND RF FREQUENCY AND DOWNCONVERTER. SEE TABLES 2 AND 4.
V
CC
+2.7V TO+5.5V
IF
OUTPUT
L1
C2
R1
C4
1000pF
C5
10
μ
F
Typic al Operating Circ uit
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| MAX2680EVKIT | 功能描述:射頻開發(fā)工具 MAX2680-82 Eval Kit RoHS:否 制造商:Taiyo Yuden 產(chǎn)品:Wireless Modules 類型:Wireless Audio 工具用于評估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V |
| MAX2680EVKIT+ | 制造商:Maxim Integrated Products 功能描述:- Boxed Product (Development Kits) |
| MAX2681EUT | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX2681EUT+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX2681EUT+T | 功能描述:上下轉(zhuǎn)換器 400MHz to 2.5GHz Upconverter RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128 |
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