參數(shù)資料
型號： HMC714LP5E
廠商： HITTITE MICROWAVE CORP
元件分類： 檢測器
英文描述： 100 MHz - 5800 MHz RF/MICROWAVE LINEAR DETECTOR, 15 dBm INPUT POWER-MAX
封裝： 5 X 5 MM, ROHS COMPLIANT, PLASTIC, SMT, 32 PIN
文件頁數(shù)： 27/40頁
文件大?。?/td> 1985K
代理商： HMC714LP5E
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
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12 - 158
RMS Output Interface and Transient Response
Output transient response is determined by the integration capacitances CINTA & CINTB and output load conditions.
Using larger values of CINT will narrow the operating bandwidth of the integrator, resulting in a longer averaging
time-interval and a more filtered output signal; however it will also slow the power detector’s transient response. A
larger CINT value favors output accuracy over speed. For the fastest possible transient settling times, leave the CINT
pins free of any external capacitance. This configuration will operate the integrator at its widest possible bandwidth,
resulting in short averaging time-interval and an output signal with little filtering. Most applications will choose to
have some external integration capacitance, maintaining a balance between speed and accuracy. Furthermore, error
performance over crest factor is degraded when CINT is very small (for CINT < 100 pF).
Modulation and deviation results in Electrical Specification Table 2 are provided with CINT = 0.1 uF.
Start by selecting CINT using the following expression, and then adjust the value as needed, based on the application’s
preference for faster transient settling or output accuracy.
CINT = 1500 uF/(2*π *
lam
), in Farads, where
lam
= lowest amplitude-modulation component frequency in Hertz
Example: when
lam
= 10 kHz, CINT = 1500 μF/(2*π*1000) = 24E-9 Farads ~ 22 nF
Table: Transient response vs. CINT capacitance: with COFS = 0
CINT
RMS Rise - Time
over Dynamic Range
Pin = 0 dBm
RMS Fall - Time
Pin = -30 dBm
Pin = -10 dBm
Pin = 0 dBm
0
35 nsec
120 nsec
200 nsec
1.18 usec
100 pF
80 nsec
410 nsec
720 nsec
1.26 usec
1 nF
780 nsec
3.3 usec
5.6 usec
7 usec
10 nF
7.8 usec
32.4 usec
54 usec
66.4 usec
Input signal is 1900 MHz CW-tone switched on and off
RMS is loaded with 1kΩ, 4 pF, and VTGT = 2V,
RF Input Interface (Continued)
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
7
8
9
10
900
1400
1900
2400
2900
3400
3900
TUNING
CAPACITANCE
(pF)
TUNI
NG
I
NDUCTANCE
(nH)
FREQUENCY (MHz)
Tuning, Single Ended Interface:
fc ± 300 MHz
HMC714LP5 / 714LP5E
v07.1109
DUAL RMS POWER DETECTOR
0.1 - 5.8 GHz
Note: For Single Ended 5800 MHz tune: C = 0.8 pF and L = 1 nH
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