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LT5554IUH-PBF PDF预览

LT5554IUH-PBF

更新时间: 2024-02-14 03:58:54
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
32页 602K
描述
Broadband Ultra Low Distortion 7-Bit Digitally Controlled VGA

LT5554IUH-PBF 技术参数

是否无铅: 含铅是否Rohs认证: 符合
生命周期:Active包装说明:HVQCCN,
针数:32Reach Compliance Code:compliant
风险等级:5.66JESD-30 代码:S-PQCC-N32
JESD-609代码:e3长度:5 mm
湿度敏感等级:1功能数量:1
端子数量:32最高工作温度:85 °C
最低工作温度:-40 °C封装主体材料:PLASTIC/EPOXY
封装代码:HVQCCN封装形状:SQUARE
封装形式:CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度(摄氏度):260
认证状态:Not Qualified座面最大高度:0.8 mm
标称供电电压:5 V表面贴装:YES
电信集成电路类型:TELECOM CIRCUIT温度等级:INDUSTRIAL
端子面层:Matte Tin (Sn)端子形式:NO LEAD
端子节距:0.5 mm端子位置:QUAD
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:5 mm
Base Number Matches:1

LT5554IUH-PBF 数据手册

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LT5554  
Broadband Ultra Low  
Distortion 7-Bit Digitally  
Controlled VGA  
FEATURES  
DESCRIPTION  
The LT®5554 is a 7-bit digitally controlled programmable  
gain (PG) amplifier with 16dB gain control range. It  
consists of a 50Ω input variable attenuator, followed by  
a high linearity variable transconductance amplifier. The  
coarse4dBinputattenuatorstepisimplementedvia2-bits  
of digital control (PG5, PG6). The fine transconductance  
amplifier 0.125dB step within 3.875dB gain control range  
is set via 5-bits digital control (PG0 to PG4). The LT5554  
gain control inputs (PGx) and the STROBE input can be  
directly coupled to TTL or ECL drivers. The seven parallel  
gain control inputs time skew can be eliminated by using  
the STROBE input positive transition.  
n
1GHz Bandwidth at all Gains  
n
48dBm OIP3 at 200MHz, 2V into 50Ω,  
P-P  
R
= 100Ω  
OUT  
n
–88dBc IMD3 at 200MHz, 2V into 50Ω,  
OUT  
P-P  
R
= 100Ω  
n
n
n
n
n
n
n
n
1.4nV/√Hz Input-Referred-Noise (RTI)  
20dBm Output P1dB at 70MHz, R  
= 130Ω  
OUT  
= 50Ω)  
2dB to 18dB Gain Range (R  
0.125dB Gain Step Size  
OUT  
30ps Group Delay Variation  
5ns Fast Gain Settling Time  
5ns Fast Overdrive Recovery  
–80dB Reverse Isolation  
The internal output resistor R = 400Ω limits the maxi-  
O
mum overall gain to 36dB for open outputs. The internal  
circuitry of open output collectors enables the LT5554 to  
be unconditionally stable over any loading conditions (in-  
cluding external SAW filters) and provides –80dB reverse  
isolation at 300MHz.  
APPLICATIONS  
n
Differential ADC Driver  
n
IF Sampling Receivers  
n
VGA IF Power Amplifier  
50Ω Driver  
n
The LT5554 is internally protected during overdrive and  
has an on-chip power supply regulator.  
n
Instrumentation  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other  
trademarks are the property of their respective owners.  
With 0.125dB step resolution and 5ns settling time, the  
LT5554 is suitable in applications where continuous gain  
control is required.  
TYPICAL APPLICATION  
OIP3 and SFDR vs Frequency  
132  
130  
128  
126  
49  
46  
43  
40  
R
OUT  
= 50Ω  
5V  
V
MODE  
CC  
0.1μF  
+
IN  
OIP3  
IF  
IF  
BPF  
RF  
INPUT  
DEC  
LT5554  
BPF  
ADC  
AMPLIFIER  
+
IN  
7 BITS  
0.1μF  
DEC  
LO  
5554 TA01  
PGx GAIN CONTROL  
STROBE  
SFDR  
C
0.1μF  
0
50  
100  
FREQUENCY (MHz)  
150  
200  
5554 TA01b  
5554f  
1

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