OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

HMC8121

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
HMC8121 Data Sheet
Rev. B | Page 10 of 16
–20
–15
–10
–5
0
5
10
81.0 81.5 82.0 82.5 83.0 83.5 84.0 84.5 85.0 85.5 86.0
GAIN (dB)
FREQUENCY (GHz)
I
DD
=265mA
I
DD
=250mA
I
DD
=225mA
I
DD
=200mA
I
DD
=175mA
I
DD
=150mA
I
DD
=140mA
I
DD
=130mA
I
DD
=120mA
I
DD
=110mA
I
DD
=100mA
I
DD
=90mA
13154-028
Figure 29. Gain vs. Frequency at Various Drain Currents,
P
IN
= −5 dBm/Tone, V
CTL1
/V
CTL2
= −1 V,
Drain Current = (I
DD1
/I
DD2
fixed at 50 mA) + (I
DD3
to I
DD6
Swept)
230
250
270
290
310
330
350
0
4
8
12
16
20
24
–15–13–11–9–7–5–3–1 1 3
I
DD
(mA)
P
OUT
(dBm), GAIN (dB), PAE (%)
INPUT POWER (dBm)
P
OUT
GAIN
PAE
I
DD
13154-032
Figure 30. P
OUT
, Gain, PAE, and I
DD
vs. Input Power,
V
CTL1
/V
CTL2
= −5 V, RF = 83.5 GHz
0.001
0.01
0.1
1
10
–4 0 4 8 12 16 20
V
REF
– V
DET
(V)
OUTPUT POWER (dBm)
RF = 81GHz
RF = 83.5GHz
RF = 86GHz
13154-031
Figure 31. Detector Output Voltage (V
REF
– V
DET
) vs. Output Power at
Various RF Frequencies, V
CTL1
/V
CTL2
= −5 V
230
250
270
290
310
330
350
0
4
8
12
16
20
24
–15–13–11–9–7–5–3–1 1 3
I
DD
(mA)
P
OUT
(dBm), GAIN (dB), PAE (%)
INPUT POWER (dBm)
P
OUT
GAIN
PAE
I
DD
13154-029
Figure 32. P
OUT
, Gain, PAE, and I
DD
vs. Input Power,
V
CTL1
/V
CTL2
= −5 V, RF = 81 GHz
230
250
270
290
310
330
350
0
4
8
12
16
20
24
–15–13–11–9–7–5–3–1 1 3
I
DD
(mA)
P
OUT
(dBm), GAIN (dB), PAE (%)
INPUT POWER (dBm)
P
OUT
GAIN
PAE
I
DD
13154-030
Figure 33. P
OUT
, Gain, PAE, and I
DD
vs. Input Power,
V
CTL1
/V
CTL2
= −5 V, RF = 86 GHz
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
–20 –18 –16 –14 –12 –10 –8 –6 –4
PEAK-TO-PEAK OUTPUT VOLTAGE (V)
TOTAL INPUT POWER (dBm)
100MHz TONE SPACING
300MHz TONE SPACING
500MHz TONE SPACING
750MHz TONE SPACING
13154-134
Figure 34. Envelope Detector Peak-to-Peak Output Voltage vs. Total Input
Power at Various Tone Spacings, RF = 81 GHz, V
CTL1
/V
CTL2
= −5 V,
V
DET
= 4 V with 150 Ω Load Impedance at ENV
DET
Data Sheet HMC8121
Rev. B | Page 11 of 16
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
–20 –18 –16 –14 –12 –10 –8 –6 –4
PEAK-TO-PEAK OUTPUT VOLTAGE (V)
TOTAL INPUT POWER (dBm)
100MHz TONE SPACING
300MHz TONE SPACING
500MHz TONE SPACING
750MHz TONE SPACING
13154-135
Figure 35. Envelope Detector Peak-to-Peak Output Voltage vs. Total Input
Power at Various Tone Spacings, RF = 83.5 GHz, V
CTL1
/V
CTL2
= −5 V,
V
DET
= 4 V with 150 Ω Load Impedance at ENV
DET
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
–20 –18 –16 –14 –12 –10 –8 –6 –4
PEAK-TO-PEAK OUTPUT VOLTAGE (V)
TO
TAL INPUT POWER (dBm)
100MHz TONE SPACING
300MHz TONE SPACING
500MHz
TONE SPACING
750MHz TONE SPACING
13154-136
Figure 36. Envelope Detector Peak-to-Peak Output Voltage vs. Total Input
Power at Various Tone Spacings, RF = 86 GHz, V
CTL1
/V
CTL2
= −5 V,
V
DET
= 4 V with 150 Ω Load Impedance at ENV
DET
HMC8121 Data Sheet
Rev. B | Page 12 of 16
THEORY OF OPERATION
The circuit architecture of the HMC8121 variable gain amplifier
is shown in Figure 37. The HMC8121 uses multiple gain stages
and staggered voltage variable attenuation stages to form a low
noise, high linearity variable gain amplifier with a gain range of
~17 dB. The first stage is a low noise preamp, which is followed
by the first voltage variable attenuator in the signal path. A
portion of the signal is coupled away and further amplified
before driving an on-chip envelope detector. The envelope
detector provides an output that is proportional to the peak
envelope power of the incoming signal. After the first
attenuator, a second stage amplifier provides additional gain
and isolation before driving the second variable attenuator
block. Three cascaded gain stages follow the second variable
attenuator. At the output of the last stage, another coupler taps
off a small portion of the output signal. The coupled signal is
presented to an on-chip diode detector for external monitoring
of the output power. A matched reference diode is included to
help correct for detector temperature dependencies. See the
application circuit in Figure 38 for further details on biasing the
different blocks and utilizing the detector features.
RFIN RFOUT
ENV
DET
ENV
DET
V
CTL1
V
CTL2
V
REF
V
DET
13154-034
Figure 37. Variable Gain Amplifier Circuit Architecture
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

HMC8121

Mfr. #:
Buy HMC8121
Manufacturer:
Analog Devices Inc.
Description:
RF Amplifier E-band 81 - 86 GHz VGA
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet