LT5506 Datasheet, PDF (4/12 Pages) Linear Technology – 40MHz to 500MHz Quadrature Demodulator with VGA

LT5506
TYPICAL PERFOR A CE CHARACTERISTICS V_CC = 3V. f_2×LO = 570MHz, P_2×LO = –5dBm
(Note 5), f_IF = 284MHz, P_IF = –30dBm, I and Q outputs 800mV_P-P into 4kΩ differential load, T_A = 25°C, EN = V_CC, STBY = V_CC,
unless otherwise noted. (Note 3)
Supply Current vs Supply Voltage
Gain and Noise Figure
vs Control Voltage at 3V Supply
32
60
85°C
30
50
28
25°C
26
24
–40°C
22
20
1.75 2.25 2.75 3.25 3.75 4.25 4.75 5.25
SUPPLY VOLTAGE (V)
5506 G01
40
30
20
10
0
–10
0
NF
GAIN
f_IF = 284MHz
f_2xLO = 570MHz
0.3 0.6 0.9 1.2 1.5 1.8
V_CTRL (V)
5506 G02
GAIN AT 25°C
NF AT 25°C
GAIN AT –40°C
NF AT –40°C
GAIN AT 85°C
NF AT 85°C
Gain and Noise Figure
vs Control Voltage at 1.8V Supply
60
50
40
30
20
10
0
–10
0
NF
GAIN
f_IF = 284MHz
f_2xLO = 570MHz
0.3 0.6 0.9 1.2 1.5 1.8
V_CTRL (V)
5506 G03
GAIN AT –40°C
NF AT –40°C
GAIN AT 25°C
NF AT 25°C
GAIN AT 85°C
NF AT 85°C
Gain Flatness
vs Control Voltage at 1.8V Supply
0.5
0.4
0.3
0.2
25°C
0.1
85°C
0
–0.1
–40°C
–0.2
–0.3
–0.4
–0.5
0
0.3 0.6 0.9 1.2 1.5
V_CTRL (V)
5506 G04
Gain and Noise Figure
vs Control Voltage and V_CC
60
50
40
30
20
10
0
–10
0
NF
GAIN
f_IF = 284MHz
f_2xLO = 570MHz
0.3 0.6 0.9 1.2 1.5 1.8
V_CTRL (V)
5506 G05
GAIN AT 1.8V
NF AT 1.8V
GAIN AT 3V
NF AT 3V
GAIN AT 5.25V
NF AT 5.25V
Gain and Noise Figure
vs IF Frequency
60
GAIN, V_CTRL = 1.6V
50
NF, V_CTRL = 0.2V
40
GAIN, V_CTRL = 0.9V
30
NF, V_CTRL = 0.9V
20
10
NF, V_CTRL = 1.6V
0
–10
10
GAIN, V_CTRL = 0.2V
100
IF FREQUENCY (MHz)
1000
5506 G06
5506fa
4