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参数资料
| 型号： | LTC5564IUD#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQCC16 |
| 封装： | 3 X 3 MM, LEAD FREE, PLASTIC, MO-220WEED-2, QFN-16 |
| 文件页数： | 12/12页 |
| 文件大小： | 146K |
| 代理商： | LTC5564IUD#TRPBF |
LTC5564
9
5564f
Propagation Delay, Slew Rate and Response Time
The LTC5564 has been designed for high slew rate op-
eration. For RF input power levels of 10dBm to 16dBm
and a GAIN1 setting, the internal amplifier will slew at
350V/μs. In a given gain setting slew rate will be maximized
for larger input power levels. Slew rate will degrade with
smaller RFIN amplitude signals or when the amplifier gain
is increased. See Electrical Characteristics.
The LTC5564 has been designed to function as a positive
peak detector. Consequently, the device responds to a
rising signal at the RF detector input much more rapidly
than a falling signal. Correspondingly, the rising edge of
VOUT transitions much more rapidly than the falling edge
transitions as shown in Figure 3.
When operating in unity gain with a 10dBm to 16dBm RF
input signal, the propagation delay to fifty percent ΔVOUT
is approximately 7.0ns.
The operational amplifier has been internally compensated
to provide 75MHz bandwidth with VOUT = 500mV and a
GAIN1 mode setting. With no RF input the output offset
will be approximately 290mV. Lowering the output offset
will degrade bandwidth performance. See the Typical
Performance Characteristics.
APPLICATIONS INFORMATION
Loading, Bypass Capacitors and Board Layout
The LTC5564 has been designed to directly drive a capaci-
tive load of 10pF at VOUT. When driving a capacitive load
greater than 10pF a series resistance should be added
between VOUT and the load to maintain good stability. This
resistance should be placed as close to VOUT as possible.
See Table 2 for typical series resistor values for various
capacitive loads.
Table 2. Typical Series Resistor Values for VOUT
Capacitive Loading
CLOAD
R SERIES
Up to 10pF
0Ω
11pF to 20pF
40Ω
21pF to 100pF
68Ω
Greater Than 100pF
100Ω
Good layout practice and proper use of bypass capacitors
will improve circuit performance and reduce the possibility
of measurement error. Bypass capacitors should be used
for pins VCCRF, VCCA, VCCP, VOUTADJ and VREF. Bypass
capacitors should be connected as close to the LTC5564
as possible. All ground return path lengths and ohmic
losses should be minimized. See Figure 5 in the Applica-
tions Information section for the demo board schematic
showing these bypass capacitances.
The LTC5564 return path for all supply currents is through
the Pin 17 exposed pad. A high resistance path from the
Pin 17 exposed pad to power supply ground will cause
a VOUT output offset error. Board layout and connections
that minimize ohmic losses from the Pin 17 exposed pad
to power supply ground will reduce this error. Measure-
ments being made relative to LTC5564 ground should be
made as close to the Pin 17 exposed pad to reduce errors.
Figure 3. VOUT Pulse Response, PIN = 8dBm
10ns/DIV
5564 F03
VOUT
500mV/DIV
ASK MODULATED RF
INPUT SIGNAL START
VCC = 5V
ASK MODULATION FREQUENCY 2.7GHz
GAIN1
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相关代理商/技术参数 |
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| LTC5567 | 制造商:LINER 制造商全称:Linear Technology 功能描述:300MHz to 4GHz Active Downconverting Mixer |
| LTC5567IUF#PBF | 功能描述:RF MIXER 4GHZ DOWNCONVERT 16QFN RoHS:是 类别:RF/IF 和 RFID >> RF 混频器 系列:- 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） |
| LTC5567IUF#TRPBF | 功能描述:RF MIXER 4GHZ DOWNCONVERT 16QFN RoHS:是 类别:RF/IF 和 RFID >> RF 混频器 系列:- 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） |
| LTC5569 | 制造商:LINER 制造商全称:Linear Technology 功能描述:4GHz to 6GHz High Dynamic Range Downconverting Mixer |
| LTC5569IUF#PBF | 功能描述:IC MIXER DOWNCONVERT DL 16QFN RoHS:是 类别:RF/IF 和 RFID >> RF 混频器 系列:- 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） |
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