LT5558

3

5558fa

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

LO Input Return Loss

EN = High (Note 6)

–10.6

dB

LO Input Return Loss

EN = Low (Note 6)

–2.5

dB

LO Input Referred Noise Figure

(Note 5) at 900MHz

14.6

dB

LO to RF Small-Signal Gain

(Note 5) at 900MHz

16.4

dB

LO Input 3rd Order Intercept

(Note 5) at 900MHz

–3.3

dBm

Baseband Inputs (BBPI, BBMI, BBPQ, BBMQ)

Baseband Bandwidth

–3dB Bandwidth

400

MHz

DC Common-mode Voltage

(Note 4)

2.1

V

Differential Input Resistance

Between BBPI and BBMI (or BBPQ and BBMQ)

3

k

Ω

Common Mode Input Resistance

(Note 20)

100

Ω

Common Mode Compliance Current range

(Notes 18, 20)

–820 to 440

μA

Carrier Feedthrough on BB

–46

dBm

IP1dB

Input 1dB compression point

Differential Peak-to-Peak (Notes 7, 19)

3.4

I/Q Absolute Gain Imbalance

0.05

dB

I/Q Absolute Phase Imbalance

0.2

Deg

Supply Voltage

4.5

5

5.25

V

Supply Current

EN = High

108

135

mA

Supply Current, Sleep mode

EN = 0V

0.1

50

μA

Turn-On Time

EN = Low to High (Note 11)

0.3

μs

Turn-Off Time

EN = High to Low (Note 12)

1.1

μs

Enable (EN), Low = Off, High = On

Enable

Input High Voltage

Input High Current

EN = High

EN = 5V

1

230

V

μA

Shutdown

Input Low Voltage

EN = Low

0.5

V

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: 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 7.

Note 4: At each of the four baseband inputs BBPI, BBMI, BBPQ and BBMQ.

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 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 flowing into the BBPI (or BBPQ) pin and the current

flowing 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).