AD8348
300
2.5
0
280
260
2.0
–5
240
(SHUNT CAPACITANCE)
–10
220
1.5
–15
RETURN LOSS LO INPUT, THROUGH BALUN
WITH 60.4 ? IN SHUNT BETWEEN LOIP/LOIN
200
180
160
140
120
100
(SHUNT RESISTANCE)
1.0
0.5
0
–20
–25
–30
–35
IF FREQUENCY (MHz)
Figure 43. Input Impedance of Mixer Input vs. F IF , VGIN = 0.7 V, V POS = 5 V
FREQUENCY APPLIED TO LOIP/LOIN (MHz)
Figure 46. Return Loss of LO Input vs. External LO Frequency
Through Balun, with Termination Resistor
90
120
60
65
150
30
60
MX INPUTS WITH 4:1 BALUN
55
180
0
50
V S = 5V
210
MXIP INPUT PIN
330
45
V S = 2.7 V
40
IMPEDANCE CIRCLE
240
300
35
–40 –30 –20 –10
0
10 20 30 40
50
60
70
80
270
Figure 44. S11 of Mixer Input vs. F IF , F IF = 50 MHz to 1 GHz,
VGIN = 0.7 V, V POS = 5 V (With and Without Balun)
0
–5
TEMPERATURE (°C)
Figure 47. Supply Current vs. Temperature
–10
RETURN LOSS LOIP PIN SINGLE-ENDED,
LOIN AC-COUPLED TO GROUND.
–15
–20
–25
–30
–35
EXTERNAL LO FREQUENCY (MHz)
Figure 45. Return Loss of LOIP Input vs. External LO Frequency
Rev. A | Page 17 of 28
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