lt5572 Linear Technology Corporation, lt5572 Datasheet - Page 6

• Manufacturer Part Number: lt5572
• Description: 1.5ghz To 2.5ghz High Linearity Direct Quadrature Modulator
• Manufacturer: Linear Technology Corporation

LT5572
TYPICAL PERFOR A CE CHARACTERISTICS
P
LO feedthrough nulling. f
unless otherwise noted. (Note 3)
6
LO
–10
–20
–30
–40
–50
–60
–70
–80
–35
–40
–45
–50
–55
= 0dBm. BBPI, BBMI, BBPQ, BBMQ inputs 0.5V
0
RF CW Output Power, HD2 and
HD3 vs CW Baseband Voltage and
Temperature
0
Image Rejection vs CW Baseband
Voltage
I AND Q BASEBAND VOLTAGE (V
I AND Q BASEBAND VOLTAGE (V
5V, –40°C
5V, 25°C
5V, 85°C
4.5V, 25°C
5.5V, 25°C
1
1
HD2 = MAX POWER AT
f
HD3 = MAX POWER AT
f
LO
LO
2
2
+ 2 • f
+ 3 • f
HD3
RF
35
30
25
20
15
10
5
0
Voltage Gain Distribution
RF
–3.2
BB
BB
3
3
OR f
OR f
= f
–40°C
25°C
85°C
HD2
BB
LO
LO
–2.8
P-P,DIFF
W
P-P,DIFF
4
– 2 • f
– 3 • f
4
+ f
25°C
85°C
–40°C
5572 G19
VOLTAGE GAIN (dB)
LO
5572 G22
–2.4
BB
)
BB
)
(upper sideband selection). P
U
5
5
10
0
–10
–20
–30
–40
–50
–60
–2.0
–1.6
–30
–40
–70
–10
–20
–30
–40
–50
–70
–80
–10
–20 IM2 = POWER AT
–50
–60
–60
10
0
I AND Q BASEBAND VOLTAGE (V
f
LO
DC
0.1
0
RF 2-Tone Power (Each Tone),
IM2 and IM3 vs Baseband Voltage
and Temperature
RF CW Output Power, HD2 and
HD3 vs CW Baseband and Supply
Voltage
f
IM3 = MAX POWER
AT f
OR f
= 2GHz
–1.2
, baseband input frequency f
LO
I AND Q BASEBAND VOLTAGE (V
5572 G25
+ 4.1MHz
LO
LO
25°C
85°C
–40°C
+ 1.9MHz
+ 2.2MHz
1
HD2 = MAX POWER AT
f
HD3 = MAX POWER AT
f
2
LO
LO
f
f
BBI
BBQ
RF(OUT)
HD3
+ 2 • f
+ 3 • f
1
RF
RF
= 2MHz, 2.1MHz, 0°
IM3
= 2MHz, 2.1MHz, 90°
IM2
BB
BB
3
P-P,DIFF, EACH TONE
OR f
OR f
= –10dBm (–10dBm/tone for 2-tone measurements),
HD2
40
35
30
25
20
15
10
LO
LO
P-P,DIFF
5
0
4
–159.4
– 2 • f
– 3 • f
Noise Floor Distribution
f
f
5V
5.5V
4.5V
LO
NOISE
5572 G20
BB
5572 G23
V
–40°C
25°C
85°C
)
= 2GHz
CC
BB
BB
= 2MHz, I and Q 90° shifted, without image or
10
= 2.02GHz
5
= 5V, EN = High, T
–159
10
0
–10
–20
–30
–40
–50
–60
)
NOISE FLOOR (dBm/Hz)
–158.6 –158.2
–30
–40
–70
–10
–20 IM2 = POWER AT
–50
–60
10
–50
–30
–35
–40
–45
–55
0
I AND Q BASEBAND VOLTAGE (V
0.1
RF 2-Tone Power (Each Tone),
IM2 and IM3 vs Baseband and
Supply Voltage
f
IM3 = MAX POWER
AT f
OR f
0
LO
LO Feedthrough to RF Output
vs CW Baseband Voltage
+ 4.1MHz
I AND Q BASEBAND VOLTAGE (V
LO
LO
5V
5.5V
4.5V
+ 1.9MHz
A
+ 2.2MHz
= 25°C, f
1
–157.8
5572 G26
2
f
f
BBI
BBQ
LO
1
RF
= 2MHz, 2.1MHz, 0°
IM3
= 2MHz, 2.1MHz, 90°
IM2
= 2.14GHz,
3
P-P,DIFF, EACH TONE
5V, –40°C
5V, 25°C
5V, 85°C
4.5V, 25°C
5.5V, 25°C
P-P,DIFF
4
5572 G24
5572 G21
5572f
)
10
5
)