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HMC8108LC5

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19
HMC8108 Data Sheet
Rev. 0 | Page 12 of 18
Measurements performed as image reject mixer with lower sideband selected, external 90° hybrid at the IF ports, IF = 60 MHz,
LO drive = −5 dBm, and T
A
= −25°C, unless otherwise noted.
16
12
8
4
0
–1.0 –0.8 –0.6
–0.4
–0.2 0
NOISE FIGURE (dB)
CONTROL VOLTAGE (V)
10GHz
9.41GHz
9GHz
15133-045
Figure 45. Noise Figure vs. Control Voltage at Various RF Frequencies
6
5
4
3
2
1
0
9.0 9.2 9.4 9.6 9.8 10.0
NOISE FIGURE (dB)
RF FREQUENCY (GHz)
10MHz
20MHz
30MHz
40MHz
50MHz
60MHz
70MHz
80MHz
90MHz
100MHz
110MHz
120MHz
15133-046
Figure 46. Noise Figure vs. RF Frequency at Various IF Frequencies
NOISE FIGURE (dB)
5
3
4
1
2
0
10 20 4030 50 60 1008070 110
90 120
IF FREQUENCY (MHz)
10GHz
9.41GHz
9GHz
15133-047
Figure 47. Noise Figure vs. IF Frequency at Various RF Frequencies
Data Sheet HMC8108
Rev. 0 | Page 13 of 18
Measurements performed without external 90° hybrid at the IF ports and T
A
= −25°C, unless otherwise noted.
0
–5
–10
–15
–20
–25
–30
9.0 9.2 9.4
9.6
9.8 10.0
RF RETURN LOSS (dB)
RF FREQUENCY (GHz)
+85°C
+25°C
–40°C
15133-048
Figure 48. RF Return Loss vs. RF Frequency over Temperature
0
–5
–10
–15
–20
–25
–30
0
0.2 0.4
0.6 0.8
1.0
RETURN LOSS (dB)
IF FREQUENCY (GHz)
IF_I AT +85°C
IF_I AT +25°C
IF_I AT –40°C
IF_Q AT +85°C
IF_Q AT +25°C
IF_Q AT –40°C
15133-049
Figure 49. In-Phase and Quadrature IF Output Return Loss vs. IF Frequency
over Temperature
9.0 9.2 9.4 9.6 9.8 10.0
RF FREQUENCY (GHz)
AMPLITUDE BALANCE (dB)
6
4
0
2
–2
–4
+85°C
+25°C
–40°C
15133-050
Figure 50. Amplitude Balance vs. RF Frequency over Temperature
9.0 9.4 9.8 10.2 10.6 11.0
LO FREQUENCY (GHz)
LO RETURN LOSS (dB)
0
–5
–15
–10
–20
–25
+85°C
+25°C
–40°C
15133-051
Figure 51. LO Return Loss vs. LO Frequency over Temperature
0
–10
–20
–30
–40
–50
9.0 9.2 9.4 9.6
9.8 10.0
LEAKAGE (dBm)
RF FREQUENCY (GHz)
LO TO RF
LO TO IF_I
LO TO IF_Q
RF TO IF_I
RF TO IF_Q
15133-052
Figure 52. Leakage vs. RF Frequency
2
0
–2
–4
–6
–8
9.0 9.2 9.4 9.6 9.8 10.0
PHASE BALANCE (Degrees)
RF FREQUENCY (GHz)
+85°C
+25°C
–40°C
15133-053
Figure 53. Phase Balance vs. RF Frequency over Temperature
HMC8108 Data Sheet
Rev. 0 | Page 14 of 18
THEORY OF OPERATION
The HMC8108 is a X-band, low noise converter with integrated
LO buffers that converts RF input signals ranging from 9 GHz
to 10 GHz down to a typical single-ended IF signal of 60 MHz
at its output. See Figure 54 for a functional block diagram of the
circuit architecture of the HMC8108.
The RF input signal passes through two stages of low noise
amplification. The preamplified RF input signal then splits
through an internal hybrid to feed two singly balanced passive
mixers. A power divider followed by three LO buffer amplifiers
drives the two I and Q mixer cores to convert the amplified RF
input frequencies to a 60 MHz typical single-ended IF. A variable
attenuator allows gain control ranging from 10 dB to 30 dB.
15133-054
RFIN
LOIN
ESD
VCTRL
ATTENUATOR
LNA_VD1
LNA_VG1
LNA1
LNA_VD2
LNA_VG2
IF_Q
IF_I
BUFF_VD
BUFF_VG
LNA2
MIX_VG
HYBRID
MIX
MIX
DIV
BUFF3 BUFF2 BUFF1
Figure 54. Functional Block Diagram of the Circuit Architecture
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19

HMC8108LC5

Mfr. #:
Buy HMC8108LC5
Manufacturer:
Analog Devices Inc.
Description:
Up-Down Converters 9-10 GHz I/Q LNC
Lifecycle:
New from this manufacturer.
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