HMC1021LP4E Datasheet, PDF (1/24 Pages) Hittite Microwave Corporation – RMS POWER DETECTOR & ENVELOPE TRACKER, DC - 3.9 GHz

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HMC1021LP4E
RMS POWER DETECTOR &
ENVELOPE TRACKER, DC - 3.9 GHz
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Typical Applications
The HMC1021LP4E is ideal for:
• Log –> Root-Mean-Square (RMS) Conversion
• Tx/Rx Signal Strength Indication (TSSI/RSSI)
• RF Power Amplifier Efficiency Control
• Receiver Automatic Gain Control
• Transmitter Power Control
• Envelope Tracking
• PA Linearization
Features
Broadband Single-Ended RF Input
RMS Detector with ±1 dB Detection
Accuracy to 3.9 GHz
Input Dynamic Range: -62 dBm to +8 dBm
±1 dB Envelope Detection Accuracy over
20 dB Input Range
Envelope Detection Bandwidth > 150MHz
Digitally Programmable Integration Bandwidth
Power-Down Mode
24 Lead 4x4mm SMT Package: 16mm²
Functional Diagram
General Descriptions
The HMC1021LP4E is an RMS power detector with
an integrated high bandwidth envelope detector. The
RMS output is a temperature compensated, monoton-
ic, linear-in-dB representation of real RF signal power,
measured over an input sensing range of 70 dB. The
envelope detector provides an accurate voltage output
which is linearly proportional to the envelope ampli-
tude of the RF input signal for modulation bandwidths
up to 150 MHz. The high bandwidth envelope detec-
tion of the HMC1021LP4E makes it ideal for detecting
broadband and high crest factor RF signals commonly
used in CDMA2000, WCDMA, and LTE systems. Ad-
ditionally, the instantaneous envelope output can be
used to create fast, excessive RF power protection,
PA linearization, and efficiency enhancing envelope-
tracking PA implementations.
The HMC1021LP4E’s RMS detector integration band-
width is digitally programmable via input pins SCI1-4
over a range of more than 4 decades. This allows the
user to dynamically set the operation bandwidth and
also permits the detection of different types of modula-
tions on the same platform.
Electrical Specifications I
The HMC1021LP4E features an internal op-amp at the
RMS output stage, which accommodates slope and
intercept adjustments and supports a wide range of
applications.
T_A = +25 °C, Vcc = 5V, Sci4 = Sci1 = 0V, Sci3 = Sci2 = 5V, Unless Otherwise Noted
Parameter
Typ.
Typ.
Typ.
Typ.
Typ.
Typ.
Typ. Units
Dynamic Range (±1dB Error) ^[1]
Input Frequency
RMSOUT Output
ETOUT Output
100
900
1900
2200
2700
3500
3900 MHz
71
71
70
69
68
64
60
dB
18
19
20
19
20
19
19
dB
Deviation vs Temperature: (Over full temperature range -40 °C to 85 °C).
Deviation is measured from reference, which is the same WCDMA input at 25 °C.
1
dB
[1] With WCDMA 4 Carrier (TM1-64 DPCH)
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: [phone] Fax: [phone] Order On-line at www.hittite.com
Application Support: Phone: [phone] or [e-mail]