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參數(shù)資料
| 型號： | LT5521EUF |
| 廠商： | Linear Integrated Systems |
| 英文描述： | Very High Linearity Active Mixer |
| 中文描述： | 很高的線性度有源混頻器 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 283K |
| 代理商： | LT5521EUF |
14
LT5521
5521f
APPLICATIU
W
U
U
noise performance with slightly reduced current through
the mixer core. Accordingly, in a 5V application operating
within this LO frequency range, the recommended source
resistor value (R1 and R7) is increased to 121
.
Enable Interface
Figure 14 shows a simplified schematic of the EN pin
interface. The voltage necessary to turn on the LT5521 is
2.9V. To disable the chip, the enable voltage must be below
0.2V. If the EN pin is not connected, the chip is disabled.
It is not recommended, however, that any pins be left
floating for normal operation.
It is important that the voltage at the EN pin never exceed
V
CC
, the power supply voltage, by more than 0.2V. If this
should occur, the supply current could be sourced through
the EN pin ESD protection diodes, potentially damaging
the IC. The resistor R8 (Figure 1) in series with the EN pin
on the demo board is populated with a 10k
resistor to
protect the EN pin to avoid inadvertant damage to the IC.
For timing measurements, this resistor is replaced with a
Figure 13. LO Port Return Loss
Figure 14. Enable Input Circuit
FREQUENCY (MHz)
0
R
–15
–10
–5
3000
5521 F13
–20
–25
1000
2000
500
3500
1500
2500
4000
–30
–35
0
C1 = 6.8pF
C1 = 2.7pF
5
V
CC
5521 F14
LT5521
EN
0
resistor. If the shutdown function is not required, then
the EN pin should be wired directly to the V
CC
power supply
on the PCB.
Supply Decoupling
The power supply decoupling shown in the schematic of
Figure 1 is recommended to minimize spurious signal
coupling into the output through the power supply.
ACPR Performance
Because of its high linearity and low noise, the LT5521 offers
outstanding ACPR performance in a variety of applications.
For example, Figures 15 and 16 show ACPR and Alternate
Channel measurements for single channel and 4-channel
64 DPCH W-CDMA signals at 1.95GHz output frequency.
OUTPUT CHANNEL POWER (dBm)
–40
–50
–40
–30
0
5521 F15
–60
ACPR
–70
–30
–20
–10
10
–80
–90
–100
–140
–135
–130
–145
–150
–155
–160
–165
A
N
T
A
= 25
°
C
f
RF
= 1.95GHz
f
IF
= 70MHz
f
LO
= 1.88GHz
30MHz OFFSET NOISE
OUTPUT CHANNEL POWER, EACH CHANNEL (dBm)
–40
–80
A
N
–75
–70
–65
–60
–50
–35
–30
–25
–20
1635 G24
–15
–55
–165
–160
–155
–150
–145
–135
–140
ACPR
AltCPR
30MHz OFFSET NOISE
T
A
= 25
°
C
f
RF
= 1.95GHz
f
IF
= 70MHz
f
LO
= 1.88GHz
Figure 15. Single Channel W-CDMA ACPR
and 30MHz Offset Noise Performance
Figure 16. 4-Channel W-CDMA ACPR,
AltCPR and 30MHz Offset Noise Floor
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT5521EUF#PBF | 功能描述:IC MIXER HI LIN 3.7GHZ 16-QFN RoHS:是 類別:RF/IF 和 RFID >> RF 混頻器 系列:LT5521 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)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(yīng)商設(shè)備封裝:12-QFN-EP（3x3） |
| LT5521EUF#TR | 功能描述:IC MIXER HI LIN 3.7GHZ 16-QFN RoHS:否 類別:RF/IF 和 RFID >> RF 混頻器 系列:LT5521 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)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(yīng)商設(shè)備封裝:12-QFN-EP（3x3） |
| LT5521EUF#TRPBF | 功能描述:IC MIXER HI LIN 3.7GHZ 16-QFN RoHS:是 類別:RF/IF 和 RFID >> RF 混頻器 系列:LT5521 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)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(yīng)商設(shè)備封裝:12-QFN-EP（3x3） |
| LT5521EUFPBF | 制造商:Linear Technology 功能描述:Upconverter Mixer,LT5521 3.7GHz QFN |
| LT5522 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:800MHz to 2.7GHz High Linearity Direct Conversion Quadrature Demodulator |
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