lt5558 Linear Technology Corporation, lt5558 Datasheet - Page 6

• Manufacturer Part Number: lt5558
• Description: 600mhz To 1100mhz High Linearity Direct Quadrature Modulator
• Manufacturer: Linear Technology Corporation

LT5558
TYPICAL PERFORMANCE CHARACTERISTICS
f
shifted, without image or LO feedthrough nulling. f
2-tone measurements), unless otherwise noted. (Note 3)
6
RF
–40
–45
–50
–55
–60
–10
–20
–30
–40
–50
–60
–70
–80
= 902MHz, P
HD2 = MAX POWER AT f
HD3 = MAX POWER AT f
0
0
RF CW Output Power, HD2 and
HD3 vs CW Baseband Voltage and
Temperature
Image Rejection vs CW Baseband
Voltage
RF
I AND Q BASEBAND VOLTAGE (V
I AND Q BASEBAND VOLTAGE (V
1
1
HD3
LO
2
2
= 0dBm. BBPI, BBMI, BBPQ, BBMQ CM input voltage = 2.1V
HD2
LO
LO
+ 2 • f
+ 3 • f
3
3
BB
BB
OR f
OR f
4
5V, –40°C
5V, 25°C
5V, 85°C
4.5V, 25°C
5.5V, 25°C
4
P-P, DIFF
P-P, DIFF
LO
LO
–40°C
25°C
85°C
– 2 • f
– 3 • f
5558 G20
5
)
5
)
BB
BB
10
0
–10
–20
–30
–40
–50
–60
5558 G17
–10
–20
–30
–40
–50
–60
–70
–80
10
IM2 = POWER AT f
IM3 = MAX POWER AT f
I AND Q BASEBAND VOLTAGE (V
–10
–20
–30
–40
–50
–60
–70
–80
0
0.1
RF
HD2 = MAX POWER AT f
HD3 = MAX POWER AT f
RF Two-Tone Power (Each Tone),
IM2 and IM3 vs Baseband Voltage
and Temperature
f
f
BBI
BBQ
RF CW Output Power, HD2 and
HD3 vs CW Baseband Voltage and
Supply Voltage
0
= f
RF
I AND Q BASEBAND VOLTAGE (V
= 2MHz, 2.1MHz, 0°
= 2MHz, 2.1MHz, 90°
BB
RF
+ f
1
HD3
IM3
LO
LO
(upper side-band selection). P
+ 4.1MHz
2
LO
HD2
1
+ 1.9MHz OR f
LO
LO
IM2
+ 2 • f
+ 3 • f
3
P-P, DIFF, EACH TONE
BB
BB
OR f
OR f
4
DC
P-P, DIFF
LO
–40°C
25°C
85°C
, baseband input frequency = 2MHz, I and Q 90°
LO
LO
+ 2.2MHz
V
4.5V
5V
5.5V
CC
– 2 • f
– 3 • f
5558 G21
5
10
)
= 5V, EN = High, T
)
BB
BB
10
0
–10
–20
–30
–40
–50
–60
5558 G18
–10
–20
–30
–40
–50
–60
–70
–80
RF(OUT)
IM2 = POWER AT f
IM3 = MAX POWER AT f
10
I AND Q BASEBAND VOLTAGE (V
0
0.1
–30
–35
–40
–45
–50
RF Two-Tone Power (Each Tone),
IM2 and IM3 vs Baseband Voltage
and Supply Voltage
f
f
BBI
BBQ
0
LO Feedthrough to RF Output vs
CW Baseband Voltage
= 2MHz, 2.1MHz, 0°
= –10dBm (–10dBm/tone for
= 2MHz, 2.1MHz, 90°
I AND Q BASEBAND VOLTAGE (V
A
= 25°C, f
5V, –40°C
5V, 25°C
5V, 85°C
4.5V, 25°C
5.5V, 25°C
1
RF
LO
IM3
+ 4.1MHz
LO
2
LO
+ 1.9MHz OR f
1
= 900MHz,
IM2
3
P-P, DIFF, EACH TONE
LO
4
4.5V
5V
5.5V
P-P, DIFF
+ 2.2MHz
5558fa
5558 G22
10
5558 G19
5
)
)