lt5558 Linear Technology Corporation, lt5558 Datasheet - Page 3

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

Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Specifi cations over the –40°C to 85°C temperature range are
assured by design, characterization and correlation with statistical process
controls.
Note 3: Tests are performed as shown in the confi guration of Figure 7.
Note 4: At each of the four baseband inputs BBPI, BBMI, BBPQ and BBMQ.
Note 5: V
Note 6: Maximum value within –1dB bandwidth.
Note 7: An external coupling capacitor is used in the RF output line.
Note 8: At 20MHz offset from the LO signal frequency.
Note 9: At 20MHz offset from the CW signal frequency.
Note 10: At 5MHz offset from the CW signal frequency.
Note 11: RF power is within 10% of fi nal value.
Note 12: RF power is at least 30dB lower than in the ON state.
ELECTRICAL CHARACTERISTICS
SYMBOL
S
S
NF
G
IIP3
Baseband Inputs (BBPI, BBMI, BBPQ, BBMQ)
BW
V
R
R
I
P
IP1dB
ΔG
Δϕ
Power Supply (V
V
I
I
t
t
Enable (EN), Low = Off, High = On
Enable
Shutdown
P
(upper sideband selection). P
CM, COMP
CC(ON)
CC(OFF)
ON
OFF
11, ON
11, OFF
CMBB
LO-BB
CC
LO
IN, DIFF
IN, CM
LO
LO
I/Q
I/Q
BB
LO
= 0dBm. BBPI, BBMI, BBPQ, BBMQ CM input voltage = 2.1V
BBPI
- V
BBMI
CC
PARAMETER
LO Input Return Loss
LO Input Return Loss
LO Input Referred Noise Figure
LO to RF Small-Signal Gain
LO Input 3rd Order Intercept
Baseband Bandwidth
DC Common-mode Voltage
Differential Input Resistance
Common Mode Input Resistance
Common Mode Compliance Current range
Carrier Feedthrough on BB
Input 1dB compression point
I/Q Absolute Gain Imbalance
I/Q Absolute Phase Imbalance
Supply Voltage
Supply Current
Supply Current, Sleep mode
Turn-On Time
Turn-Off Time
Input High Voltage
Input High Current
Input Low Voltage
)
= 1V
DC
, V
BBPQ
RF(OUT)
- V
BBMQ
= –10dBm, unless otherwise noted. (Note 3)
= 1V
DC
.
CONDITIONS
EN = High (Note 6)
EN = Low (Note 6)
(Note 5) at 900MHz
(Note 5) at 900MHz
(Note 5) at 900MHz
–3dB Bandwidth
(Note 4)
Between BBPI and BBMI (or BBPQ and BBMQ)
(Note 20)
(Notes 18, 20)
P
Differential Peak-to-Peak (Notes 7, 19)
EN = High
EN = 0V
EN = Low to High (Note 11)
EN = High to Low (Note 12)
EN = High
EN = 5V
EN = Low
OUT
V
= 0 (Note 4)
CC
= 5V, EN = High, T
DC
, baseband input frequency = 2MHz, I and Q 90° shifted
Note 13: Baseband is driven by 2MHz and 2.1MHz tones. Drive level is set
in such a way that the two resulting RF tones are –10dBm each.
Note 14: IM2 measured at LO frequency + 4.1MHz
Note 15: IM3 measured at LO frequency + 1.9MHz and LO frequency +
2.2MHz.
Note 16: Amplitude average of the characterization data set without image
or LO feedthrough nulling (unadjusted).
Note 17: The difference in conversion gain between the spurious signal at
f = 3 • LO - BB versus the conversion gain at the desired signal at f = LO +
BB for BB = 2MHz and LO = 900MHz.
Note 18: Common mode current range where the common mode (CM)
feedback loop biases the part properly. The common mode current is the
sum of the current fl owing into the BBPI (or BBPQ) pin and the current
fl owing into the BBMI (or BBMQ) pin.
Note 19: The input voltage corresponding to the output P1dB.
Note 20: BBPI and BBMI shorted together (or BBPQ and BBMQ shorted
together).
A
= 25°C, f
LO
= 900MHz, f
MIN
4.5
1
–820 to 440
RF
–10.6
–2.5
14.6
16.4
–3.3
0.05
TYP
= 902MHz,
400
100
–46
108
230
2.1
3.4
0.2
0.1
0.3
1.1
3
5
LT5558
MAX
5.25
135
0.5
50
V
P-P,DIFF
UNITS
5558fa
3
dBm
dBm
MHz
Deg
mA
kΩ
μA
μA
μA
dB
dB
dB
dB
dB
μs
μs
Ω
V
V
V
V