Texas Instruments TRF3722 EVM, Manual

Page: 19 / 69

Frequency (MHz)
HD
3
LO
(d
B
c)
0 500 1000 1500 2000 2500 3000 3500 4000 4500
-80
-75
-70
-65
-60
-55
-50
-45
-40
-35
-30
-25
D061
T
A
= -40 q C
T
A
= 25 q C
T
A
= 85
q
C
Frequency (MHz)
HD
3
LO
(d
B
c)
0 500 1000 1500 2000 2500 3000 3500 4000 4500
-80
-75
-70
-65
-60
-55
-50
-45
-40
-35
-30
-25
D206
V
CC
= 3.15V, 4.75V
V
CC
= 3.30V, 5.00V
V
CC
= 3.45V, 5.25V
Frequency (MHz)
HD
3
LO
(d
B
c)
0 500 1000 1500 2000 2500 3000 3500 4000 4500
-80
-75
-70
-65
-60
-55
-50
-45
-40
-35
-30
-25
D059
T
A
= -40
q
C
T
A
= 25 q C
T
A
= 85 q C
Frequency (MHz)
HD
3
LO
(d
B
c)
0 500 1000 1500 2000 2500 3000 3500 4000 4500
-80
-75
-70
-65
-60
-55
-50
-45
-40
-35
-30
-25
D205
V
CC
= 3.15V, 4.75V
V
CC
= 3.30V, 5.00V
V
CC
= 3.45V, 5.25V
Frequency (MHz)
HD
3
LO
(d
B
c)
0 500 1000 1500 2000 2500 3000 3500 4000 4500
-80
-75
-70
-65
-60
-55
-50
-45
-40
-35
-30
-25
D057
T
A
= -40
q
C
T
A
= 25
q
C
T
A
= 85 q C
Frequency (MHz)
HD
3
LO
(d
B
c)
0 500 1000 1500 2000 2500 3000 3500 4000 4500
-80
-75
-70
-65
-60
-55
-50
-45
-40
-35
-30
-25
D204
V
CC
= 3.15V, 4.75V
V
CC
= 3.30V, 5.00V
V
CC
= 3.45V, 5.25V
19
TRF3722
www.ti.com SLWS245B – MAY 2014 – REVISED FEBRUARY 2017
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Typical Characteristics - LO Harmonic (continued)
Unless specified all plots were created using TRF3722EVM, VCC = 3.3 V, VCC_TK = 5 V, and T
A
= 25°C, I/Q frequency (f
BB
)
4.5 MHz and 5.5 MHz, V
CM
= 0.25 V, and 4.7 pF series capacitor at RFOUT. Optimized bias settings as per Table 16 .
Figure 56. LO Third Harmonic vs Temperature,
Typical Operating Mode
Figure 57. LO Third Harmonic vs Supply,
Typical Operating Mode
Figure 58. LO Third Harmonic vs Temperature,
High Gain Mode
Figure 59. LO Third Harmonic vs Supply,
High Gain Mode
Figure 60. LO Third Harmonic vs Temperature,
Low Power Mode
Figure 61. LO Third Harmonic vs Supply,
Low Power Mode