LT5518 Просмотр технического описания (PDF) - Linear Technology
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LT5518 Datasheet PDF : 16 Pages
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LT5518
ELECTRICAL CHARACTERISTICS VCC = 5V, EN = High, TA = 25°C, fLO = 2GHz, fRF = 2.002GHz, PLO = 0dBm.
BBPI, BBMI, BBPQ, BBMQ inputs 2.06VDC, Baseband Input Frequency = 2MHz, I and Q 90° shifted (upper sideband selection).
PRF, OUT = –10dBm, unless otherwise noted. (Note 3)
SYMBOL
PARAMETER
CONDITIONS
Baseband Inputs (BBPI, BBMI, BBPQ, BBMQ)
BWBB
VCMBB
RIN, DIFF
RIN, CM
ICM, COMP
PLO2BB
IP1dB
Baseband Bandwidth
–3dB Bandwidth
DC Common Mode Voltage
(Note 4)
Differential Input Resistance
Between BBPI and BBMI (or BBPQ and BBMQ)
Common Mode Input Resistance
BBPX and BBMX Shorted Together
Common Mode Compliance Current Range BBPX and BBMX Shorted Together (Note 18)
Carrier Feedthrough on BB
Input 1dB Compression Point
POUT = 0 (Note 4)
Differential Peak-to-Peak (Note 7)
ΔGI/Q
I/Q Absolute Gain Imbalance
ΔφI/Q
I/Q Absolute Phase Imbalance
Power Supply (VCC)
VCC
Supply Voltage
ICC, ON
Supply Current
ICC, OFF
Supply Current, Sleep Mode
tON
Turn-On Time
tOFF
Turn-Off Time
Enable (EN), Low = Off, High = On
EN = High
EN = 0V
EN = Low to High (Note 11)
EN = High to Low (Note 12)
Enable
Input High Voltage
Input High Current
EN = High
EN = 5V
Sleep
Input Low Voltage
EN = Low
MIN TYP MAX UNITS
400
2.06
2.9
105
–730 to 480
– 40
2.7
0.06
1
MHz
V
kΩ
Ω
µA
dBm
VP-P, DIFF
dB
deg
4.5
5
5.25
V
128
145
mA
0.05
50
µA
0.2
µs
1.3
µs
1.0
V
240
µA
0.5
V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Specifications 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 configuration of Figure 8.
Note 4: On each of the four baseband inputs BBPI, BBMI, BBPQ and
BBMQ.
Note 5: V(BBPI) – V(BBMI) = 1VDC, V(BBPQ) – V(BBMQ) = 1VDC.
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 final value.
Note 12: RF power is at least 30dB lower than in the ON state.
Note 13: Baseband is driven by 2MHz and 2.1MHz tones. Drive level is set
in such a way that the two resulting RF output 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 = 2GHz.
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 flowing into the BBPI (or BBPQ) pin and the current
flowing into the BBMI (or BBMQ) pin.
5518f
3
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