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参数资料
型号： LTC6412IUF#TRPBF
厂商： Linear Technology
文件页数： 1/24页
文件大小： 0K
描述： IC VGA ANLG-CNTRL 31DB 24-QFN
标准包装： 2,500
放大器类型： 可变增益
电路数： 1
输出类型： 差分
-3db带宽： 800MHz
电流 - 电源： 110mA
电流 - 输出 / 通道： 70mA
电压 - 电源，单路/双路(±)： 3 V ~ 3.6 V
工作温度： -40°C ~ 85°C
安装类型： 表面贴装
封装/外壳： 24-WFQFN 裸露焊盘
供应商设备封装： 24-QFN 裸露焊盘（4x4）
包装： 带卷 (TR)
LTC6412
1
6412fa
TYPICAL APPLICATION
DESCRIPTION
800MHz, 31dB Range
Analog-Controlled VGA
The LTC
6412 is a fully differential variable gain amplier
with linear-in-dB analog gain control. It is designed for
AC-coupled operation in IF receiver chains from 1MHz
to 500MHz. The part has a constant OIP3 across a wide
output amplitude range and across the 31dB gain control
range. The output noise (NF + Gain) is also at versus gain
to provide a uniform spurious-free dynamic range (SFDR)
>120dB over the full gain control range at 240MHz.
The LTC6412 is ideal for interfacing with the LT
5527 and
LT5557 downconverting mixers, LTC6410-6 IF amplier
and the LTC6400/LTC6401/LTC6416 ADC drivers for use
in 12-, 14-, and 16-bit ADC applications.
The LTC6412 recovers quickly from an overdrive condition,
and the EN pin allows for a fast output signal disable to
protect sensitive downstream components. Asserting the
SHDN pin reduces the current consumption below 1mA
for power-down or sleep modes.
3.3V Fully Differential 240MHz IF Receiver Chain with 31dB Gain Control
FEATURES
APPLICATIONS
n 800MHz –3dB Small-Signal Bandwidth
n Continuously-Adjustable Gain Control
n –14dB to +17dB Linear-in-dB Gain Range
n 35dBm OIP3 at 240MHz Across All Gain Settings
n 10dB Noise Figure at Maximum Gain
n (IIP3 – NF) = +8dBm at 240MHz Across All Gains
n 2.7nV/√Hz Input Referred Noise
n Differential Inputs and Outputs
n 50Ω Input Impedance Across all Gains
n Single Supply Operation from 3V to 3.6V
n 110mA Supply Current
n 4mm
× 4mm × 0.75mm 24-Pin QFN Package
n IF Signal Chain Automatic Gain Control (AGC)
n 2.5G and 3G Cellular Basestation Transceivers
n WiMAX, WiBro, WLAN Receivers
n Satellite and GPS Receiver IF
V
CC
SHDN
EN
GND
V
CM
V
REF
DECL1
DECL2
–V
G
+V
G
+IN
10nF
0.1μF
BPF
VCM
GND
6412 TA01
VDD
LTC2208
0.1μF
3.3V
1nF
0.1μF
180nH
3.3V
+OUT
–OUT
AIN
+
AIN
–
–OUT
+OUT
10nF
0.1μF
GAIN CONTROL
(+ SLOPE MODE)
IF INPUT
+IN V+
V–
VCM
LTC6400-8
–IN
LTC6412
–IN
2.2μF
VGA Gain vs Frequency
Over Gain Control Range
FREQUENCY (MHz)
–20
GAIN
(dB)
–10
0
10
20
1
100
1000
10000
6412 G01
–30
10
GMAX
GMIN
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
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LTC6416CDDB-TRPBF 制造商:LINER 制造商全称:Linear Technology 功能描述:2 GHz Low Noise Differential 16-Bit ADC Buffer
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