lt5571 Linear Technology Corporation, lt5571 Datasheet - Page 6

• Manufacturer Part Number: lt5571
• Description: 620mhz - 1100mhz High Linearity Direct Quadrature Modulator
• Manufacturer: Linear Technology Corporation

LT5571
TYPICAL PERFORMANCE CHARACTERISTICS
f
shifted, without image or LO feedthrough nulling. f
tone measurements), unless otherwise noted. (Note 3)
6
RF
–10
–20
–30
–40
–50
–60
–70
–80
–46
–48
–50
–52
–54
–56
–58
= 902MHz, P
25
20
15
10
0
5
0
0
RF CW Output Power, HD2 and
HD3 vs CW Baseband Voltage and
Temperature
–6.5
0
Image Rejection vs CW Baseband
Voltage
Voltage Gain Distribution
I AND Q BASEBAND VOLTAGE (V
I AND Q BASEBAND VOLTAGE (V
–40°C
25°C
85°C
–6
1
1
–5.5 –5 –4.5 –4 –3.5 –3 –2.5 –2
LO
HD3
2
HD2 = MAX POWER AT
f
HD3 = MAX POWER AT
f
= 0dBm. BBPI, BBMI, BBPQ, BBMQ CM input voltage = 0.5V
2
LO
LO
RF
GAIN (dB)
HD2
+ 2 • f
+ 3 • f
3
3
BB
BB
OR f
OR f
V
BB
LO
LO
= 400mV
4
P-P, DIFF
5V, –40°C
5V, 25°C
5V, 85°C
4.5V, 25°C
5.5V, 25°C
4
P-P,DIFF
– 2 • f
– 3 • f
25°C
85°C
–40°C
5571 G19
5571 G22
5571 G25
BB
BB
)
P-P
)
5
5
20
10
–10
–20
–30
–40
–50
–60
0
–10
–20
–30
–40
–50
–60
–70
–80
–10
–20 IM2 = POWER AT
–30
–40
–50
–60
–70
–80
25
20
15
10
10
RF
0
5
0
I AND Q BASEBAND VOLTAGE (V
–159.9
0.1
0
RF CW Output Power, HD2 and
HD3 vs CW Baseband Voltage and
Supply Voltage
RF Two-Tone Power (Each Tone),
IM2 and IM3 vs Baseband Voltage
and Temperature
Noise Floor Distribution (no RF)
= f
f
IM3 = MAX POWER
AT f
OR f
LO
I AND Q BASEBAND VOLTAGE (V
–40°C
25°C
85°C
BB
+ 4.1MHz
LO
LO
25°C
85°C
–40°C
+ f
+ 1.9MHz
1
+ 2.2MHz
–159.6
RF
LO
HD3
NOISE FLOOR (dBm/Hz)
(upper sideband selection). P
HD2
2
HD2 = MAX POWER AT
f
HD3 = MAX POWER AT
f
LO
LO
–159.3
f
f
BBI
BBQ
+ 2 • f
+ 3 • f
1
RF
= 2MHz, 2.1MHz, 0°
= 2MHz, 2.1MHz, 90°
IM3
3
IM2
BB
BB
–159.0
OR f
OR f
P-P,DIFF, EACH TONE
LO
LO
DC
4
P-P, DIFF
– 2 • f
– 3 • f
, Baseband Input Frequency f
–158.7
V
5571 G20
5571 G23
5571 G26
5V
5.5V
4.5V
CC
)
BB
BB
5
10
= 5V, EN = High, T
10
–10
–20
–30
–40
–50
–60
0
)
RF(OUT)
–10
–20 IM2 = POWER AT
–30
–40
–50
–60
–70
–80
10
20
10
–30
–35
–40
–45
0
I AND Q BASEBAND VOLTAGE (V
0
<–50
0.1
RF Two-Tone Power (Each Tone),
IM2 and IM3 vs Baseband Voltage
and Supply Voltage
LO Leakage Distribution
f
IM3 = MAX POWER
AT f
OR f
0
LO Feedthrough to RF Output vs
CW Baseband Voltage
LO
= –10dBm (–10dBm/tone for 2-
–40°C
25°C
85°C
+ 4.1MHz
I AND Q BASEBAND VOLTAGE (V
LO
LO
–48
5V
5.5V
4.5V
+ 1.9MHz
A
+ 2.2MHz
5V, –40°C
5V, 25°C
5V, 85°C
4.5V, 25°C
5.5V, 25°C
1
= 25°C, f
–46
LO LEAKAGE (dBm)
BB
–44 –42 –40
= 2MHz, I & Q 90°
2
f
f
BBI
BBQ
LO
1
= 2MHz, 2.1MHz, 0°
RF
= 2MHz, 2.1MHz, 90°
IM3
IM2
= 900MHz,
3
V
P-P,DIFF, EACH TONE
BB
–38
= 400mV
4
P-P, DIFF
–36
5571 G24
5571 G27
P-P
5571 G21
–34
5571f
)
10
5
)