参数资料
| 型号： | LT5554IUH#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/32页 |
| 文件大小： | 0K |
| 描述： | IC VGA DIG CONTROL 32-QFN |
| 标准包装： | 73 |
| 应用： | 可变增益（VGA） |
| 电路数： | 1 |
| -3db带宽： | 1GHz |
| 电流 - 电源： | 200mA |
| 电压 - 电源，单路/双路(±)： | 4.75 V ~ 5.25 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN 裸露焊盘（5x5） |
| 包装： | 管件 |
| 产品目录页面： | 1322 (CN2011-ZH PDF) |
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LT5554
14
5554f
PIN FUNCTIONS
When the MODE pin is left open, the PGx inputs are AC-
couple and the STROBE input is DC-coupled.
In DC-coupled mode, the PGx and STROBE inputs levels are
0.6V and 2.2V. In AC-coupled mode, the PGx and STROBE
inputs are driven with 0.6VP-P minimum amplitude (with
rise and fall time <5ns) regardless the DC voltage level. A
positive transition sets a High-state. A negative transition
sets a Low-state (for PGx and STROBE inputs).
OUT+ (Pin 20):
Positive Amplier Output Pin. A transformer
with a center tap tied to VCC or a choke inductor is recom-
mended to conduct the DC quiescent current.
OUT– (Pin 21):
Negative Amplier Output Pin. A transformer
with a center tap tied to VCC or a choke inductor is recom-
mended to conduct the DC quiescent current.
ENB (Pin 23): Enable Pin for Amplier. When the ENB
input voltage is higher than 3V, the amplier is turned on.
When the ENB input voltage is less than or equal to 0.6V,
the amplier is turned off.
PG4 (Pin 27): 2dB Step Amplier Programmable Gain Con-
trol Input Pin. Input levels are controlled by MODE pin.
PG3 (Pin 29): 1dB Step Amplier Programmable Gain Con-
trol Input Pin. Input levels are controlled by MODE pin.
PG2(Pin30):0.5dBStepAmplierProgrammableGainCon-
trol Input Pin. Input levels are controlled by MODE pin.
PG1 (Pin 32): 0.25dB Step Amplier Programmable
Gain Control Input Pin. Input levels are controlled by
MODE pin.
EXPOSED PAD (Pin 33): Ground. This pin must be sol-
dered to the printed circuit board ground plane for good
heat dissipation.
BLOCK DIAGRAM
Figure 1. Functional Block Diagram
VOLTAGE
REGULATOR
AND BIAS
AMPLIFIER
DEC
GND
(15 PINS)
RO
400Ω
5554 BD
ENABLE
CONTROL
IN+
OUT–
OUT+
IN–
DEC
VCC
ENB
MODE
STROBE
LOGIC
TRANSCONDUCTANCE
GAIN LOGIC
0.125dB STEPS
3.875dB RANGE
ATTENUATOR
GAIN LOGIC
4dB STEPS
12dB RANGE
PG4
PG3
PG6
PG5
MODE
STROBE
PG2
PG1
PG0
ATTENUATOR
RIN
+
25Ω
RIN
–
25Ω
23
21
32
30
29
27
14
18
9
11
6
5
4
3
12
20
24
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT5554IUH-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Broadband Ultra Low Distortion 7-Bit Digitally Controlled VGA |
| LT5557 | 制造商:LINER 制造商全称:Linear Technology 功能描述:4GHz to 6GHz High Dynamic Range Downconverting Mixer |
| LT5557EUF#PBF | 功能描述:IC DOWNCONVERTING MIXER 16-QFN RoHS:是 类别:RF/IF 和 RFID >> RF 混频器 系列:LT5557 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:100 系列:- RF 型:W-CDMA 频率:2.11GHz ~ 2.17GHz 混频器数目:1 增益:17dB 噪音数据:2.2dB 次要属性:- 电流 - 电源:11.7mA 电源电压:2.7 V ~ 3.3 V 包装:托盘 封装/外壳:12-VFQFN 裸露焊盘 供应商设备封装:12-QFN-EP（3x3） |
| LT5557EUF#TRPBF | 功能描述:IC DOWNCONVERTING MIXER 16-QFN RoHS:是 类别:RF/IF 和 RFID >> RF 混频器 系列:LT5557 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:100 系列:- RF 型:W-CDMA 频率:2.11GHz ~ 2.17GHz 混频器数目:1 增益:17dB 噪音数据:2.2dB 次要属性:- 电流 - 电源:11.7mA 电源电压:2.7 V ~ 3.3 V 包装:托盘 封装/外壳:12-VFQFN 裸露焊盘 供应商设备封装:12-QFN-EP（3x3） |
| LT5557EUFPBF | 制造商:Linear Technology 功能描述:0.4-3.8GHz 3.3V Active Down Mixer QFN16 |
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