参数资料
| 型号： | LT5554IUH#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/32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) |
第1页第2页第3页第4页第5页第6页第7页第8页当前第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
LT5554
17
5554f
Circuit Operation
The LT5554 is a high dynamic range programmable-gain
amplier. It consists of the following sections:
An input variable attenuator with 50Ω input imped-
ance (four 4dB steps, controlled by PG5, PG6 inputs)
A differential programmable transconductance ampli-
er (32 steps, 0.125dB each controlled by PG0, PG1,
PG2, PG3, PG4 inputs)
Programmable logic blocks
Internal bias (voltage regulators)
Enable/disable circuit
Overdrive protection circuit
Noise Denitions for 50Ω Matched Input
eRS
Source resistor RMS noise voltage:
ek T R
for R
e
nV
Hz
RS
S
RS
2
450
09
==
=
;
,
.
Ω
eN
Equivalent short-circuit input RMS noise voltage
source
iN
Equivalent open-circuit input RMS noise current
source
vN
Equivalent total input RMS noise voltage
source:
vN2 = eN2 + iN2 RS2 (RS = 50Ω)
RTI
Referred-to-input LT5554 noise voltage:
RTI =
(e
+e
+i
R
)
=
v
2
RS
2
N
2
N
2
S
2
N
2
VONOISE LT5554 output noise voltage:
V=
RTI +
e
2
10
ONOISE
2
RS
2
GV
2
20
NF
Noise gure in dB according to any of the fol-
lowing equations:
NF
ei
R
e
NN
S
RS
=+
+
()
=
+
10
1
10
1
22
2
log
log
V
e
RTI
e
N
RS
2
10
1
2
=
+
log
Linearity Denitions for 50Ω Matched Input
IMD3[dBc]
Third-order intermodulation product
(negative value)
IIP3[dBm]
IIP3 = P (per-tone) –
IMD3
2
IN
SFDR[dBm/Hz] SFDR =
2
3
174+IIP3–NF
()
OIP3[dBm]
OIP
P
IMD
IIP
G
OUT
P
3
2
3
==
+
–
APPLICATIONS INFORMATION
DEFINITION OF SPECIFICATIONS
Since no internal feedback network is used between ampli-
er outputs and inputs, the LT5554 is able to offer:
Unconditional stability for I/O reactive loading such
as lters (no isolation output resistors required)
High reverse isolation
The LT5554 is a class-A transconductance amplier. An
input signal voltage is rst converted to an output cur-
rent via the LT5554 internal GM. And then, the output load
(ROUT) converts the output current into an output voltage.
ROUT sets the LT5554 gain and output noise oor. However,
the SFDR performance is almost independent of ROUT for
values of 25Ω to 100Ω.
相关PDF资料 |
PDF描述 |
|---|---|
| 2-1877846-1 | PLUG 6POS 0 DEG GRY/RED 2.7-3.9 |
| VI-B3J-MU-F2 | CONVERTER MOD DC/DC 36V 200W |
| 1-1877846-5 | PLUG 6POS 0 DEG BLK/RED 2.7-3.9 |
| 1-1877846-2 | PLUG 6POS 80 DEG GRY/GRY 2.7-3.9 |
| VI-B3H-MU-F4 | CONVERTER MOD DC/DC 52V 200W |
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 |
发布紧急采购，3分钟左右您将得到回复。