HMC614LP4 / 614LP4E
v04.0309
RMS & Peak to Average
Power Detector 0.1 - 3.9 GHz
IPWR Output for an Input Crest Factor
IPWR Output for an Input Crest Factor
of 9.03 dB over Temperature vs. Time [3]
of 12.04 dB over Temperature vs. Time [3]
2
2.4
+25C
+85C
-40C
+25C
+85C
-40C
1.9
1.8
1.7
1.6
1.5
1.4
2.2
2
1.8
1.6
1.4
12
0
1
2
3
4
5
0
1
2
3
4
5
6
7
8
TIME (us)
TIME (us)
IPWR Output & Input RF Signal Envelope vs.
Time For An Input Crest Factor of 9.03 dB [4]
IPWR Output & Input RF Signal Envelope vs.
Time For An Input Crest Factor of 12.04 dB[4]
2.8
2.4
2
4.2
3.4
2.6
1.8
1
2.4
1.6
1.2
0.8
0.4
0
IPWR Output
IPWR Output
2
1.6
1.2
0.8
0.4
0
1.6
1.2
0.8
0.4
0
0.2
-0.6
-1.4
-0.4
-0.8
Input RF Signal Envelope
Input RF Signal Envelope
0
1
2
3
4
5
0
1
2
3
4
5
6
7
8
TIME (μs)
TIME (μs)
IPWR Output vs. Instantaneous Input
Power (Normalized to Average Power) [5]
Peak IPWR vs Input Crest Factor [5]
3
3
IPWR(t) = (VTGT/10)x(Pin(t)/Pavg)+(1.6-(Vtgt/10))
2.8
Peak IPWR Output VTGT = 2V
2.8
Peak IPWR Output VTGT = 1V
2.6
2.4
2.2
2
2.6
2.4
2.2
2
1.8
=Pin/Pav*0.2+(1.6-0.2)
IPWR Output VTGT = 2V
1.8
1.6
1.6
1.4
=Pin/Pav*0.1+(1.6-0.1)
IPWR Output VTGT = 1V
0
2
4
6
8
10
12
3
5
7
9
11
13
INSTANTANEOUS INPUT POWER
(NORMALIZED TO AVERAGE POWER)
INPUT CREST FACTOR (dB)
[1] See application circuit for location of R1
[2] See application section Log-Slope, R
[4] V
2V, Average Input Power = 0 dBm
TGT
= 12kΩ, R
= 24KΩ
SET
[5] P = -20 dBm @ 1.9 GHz
IN
FBK
[3] V
1V, Average Input Power = 0 dBm
TGT
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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