参数资料
| 型号： | LT5554IUH#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/32页 |
| 文件大小： | 0K |
| 描述： | IC VGA DIG CONTROL 32-QFN |
| 标准包装： | 2,500 |
| 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： | 带卷 (TR) |
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LT5554
1
5554f
FREQUENCY (MHz)
0
SFDR
(dBm/Hz)
132
130
128
126
OIP3
(dBm)
49
46
43
40
50
100
150
5554 TA01b
200
SFDR
OIP3
ROUT = 50Ω
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Broadband Ultra Low
Distortion 7-Bit Digitally
Controlled VGA
The LT5554 is a 7-bit digitally controlled programmable
gain (PG) amplier with 16dB gain control range. It
consists of a 50Ω input variable attenuator, followed by
a high linearity variable transconductance amplier. The
coarse 4dB input attenuator step is implemented via 2-bits
of digital control (PG5, PG6). The ne transconductance
amplier 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.
The internal output resistor RO = 400Ω limits the maxi-
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 lters) and provides –80dB reverse
isolation at 300MHz.
The LT5554 is internally protected during overdrive and
has an on-chip power supply regulator.
With 0.125dB step resolution and 5ns settling time, the
LT5554 is suitable in applications where continuous gain
control is required.
n 1GHz Bandwidth at all Gains
n 48dBm OIP3 at 200MHz, 2VP-P into 50Ω,
ROUT = 100Ω
n –88dBc IMD3 at 200MHz, 2VP-P into 50Ω,
ROUT = 100Ω
n 1.4nV/√Hz Input-Referred-Noise (RTI)
n 20dBm Output P1dB at 70MHz, ROUT = 130Ω
n 2dB to 18dB Gain Range (ROUT = 50Ω)
n 0.125dB Gain Step Size
n 30ps Group Delay Variation
n 5ns Fast Gain Settling Time
n 5ns Fast Overdrive Recovery
n –80dB Reverse Isolation
n Differential ADC Driver
n IF Sampling Receivers
n VGA IF Power Amplier
n 50Ω Driver
n Instrumentation
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
RF
INPUT
LO
0.1μF
CDEC
0.1μF
IF
BPF
ADC
IF
AMPLIFIER
LT5554
DEC
IN+
VCC
MODE
STROBE
5554 TA01
PGx GAIN CONTROL
5V
IN–
+
–
7 BITS
OIP3 and SFDR vs Frequency
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| LT5557EUF-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:400MHz to 3.8GHz 3.3V High Signal Level Downconverting Mixer |
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