HMC614LP4 / 614LP4E
v04.0309
RMS & Peak to Average
Power Detector 0.1 - 3.9 GHz
Typical Applications
The HMC614LP4(E) is ideal for:
Features
IPWR Output: Instantaneous Power,
Crest Factor Measurement
• Log –> Root-Mean-Square (RMS) Conversion
• Received Signal Strength Indication (RSSI)
• Transmitter Signal Strength Indication (TSSI)
• RF Power Amplifier Efficiency Control
• Receiver Automatic Gain Control
RF Signal Wave shape & Crest Factor Independent
Supports Controller Mode [1]
1 dB Detection Accuracy to 3.9 GHz
Input Dynamic Range: -57 dBm to +15 dBm
+5V Operation from -40°C to +85°C
Excellent Temperature Stability
• Transmitter Power Control
Power-Down Mode
12
24 Lead 4x4mm QFN Package: 9 mmꢀ
Functional Diagram
General Description
The HMC614LP4E RMS Power Detector is designed
for RF power measurement, and control applications
for frequencies up to 3.9 GHz. The detector provides
a “true RMS” representation of any RF/IF input sig-
nal. The output is a temperature compensated, mono-
tonic representation of real signal power, measured
with a differential input sensing range of 71 dB.
The HMC614LP4E is ideally suited to those wide
bandwidth, wide dynamic range applications, requir-
ing repeatable measurement of real signal power;
especially where RF/IF wave shape and/or crest factor
change with time.
The HMC614LP4E provides an indication of the in-
stantaneous or peak input power level normalized to
the average input power level (peak to average power
ratio) via the IPWR output. The capability of simultane-
ously measuring the instantaneous power (envelope
power) and the average true RMS power provides
crucial information about the RF input signal: Peak
Power, Average Power, Peak to average power and
RF Wave-Shape.
Electrical Specifications, TA = +25C, Vcc= 5V, CINT = 0.1 μF [2]
Parameter
Typ.
100
70
Typ.
900
71
Typ.
1900
70
Typ.
2200
69
Typ.
2700
62
Typ.
3000
62
Typ.
3500
53
Typ.
3900
45
Units
MHz
dB
Input Frequency
Dynamic Range ( 1 dB linearity Error) [1]
Differential Input Configuration Logarithmic Slope
Logarithmic Slope
37.5
-69.8
13
37.5
-69.4
15
37.6
-68.8
>15
38.1
-67.4
>15
39.6
-63.6
12
41.0
-60.8
14
44.5
-54.8
10
50.2
-49.2
5
mV/dB
dBm
Logarithmic Intercept
Max. input Power at 1 dB Error
Min. input Power at 1 dB Error
Deviation vs. Temperature:
dBm
-57
-56
-55
-54
-50
-48
-43
-40
dBm
Deviation is measured from reference, which is the same CW Input @ 25° C
Differential Input Interface with 1:1 Balun Transformer (Over Full Input Frequency Range)
0.5
dB
[1] For more information regarding controller mode operation, please contact your Hittite sales representative or email sales@hittite.com
[2] Differential input drive via 1:1 balun transformer, VTGT = 2V unless otherwise noted.
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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