F1490 Datasheet

© 2020 Renesas Electronics Corporation

23

August 17, 2020

Power Supplies

supply pins. Supply noise can degrade noise figure. In addition, all control pins should remain at 0V (±0.3V) while the supply voltage ramps or

while it returns to zero.

If control signal integrity is a concern and clean signals cannot be guaranteed due to overshoot, undershoot, ringing, etc., the following circuit

is recommended at the input of each control pin. This applies to the GAIN_SEL pin (15) and STBY pin (16) as shown below. Note the

recommended resistor and capacitor values do not necessarily match the EV Kit BOM for the case of poor control signal integrity. For multiple

devices driven by a single control line, the component values will need to be adjusted accordingly so as not to load down the control line.

Figure 38. Control Pin Interface for Signal Integrity

STBY

EPAD

1

2

3

4

9

10

11

12

Bias Controller

5k

Ω

2pF

GAIN_SEL

5k

Ω

2pF