F4481 datasheet(6/45 Pages) RENESAS

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F4481 Datasheet

December 15, 2020

Pin Descriptions

Table 1.

Pin Descriptions

Number

Name

Description

1, 4, 8, 11,

14, 15, 26,

28, 29, 31,

33, 38, 40,

42, 43, 45, 56

GND

Internally grounded. These pins must be grounded as close to the device as possible.

RFIN_A+

Channel A RF differential input. Internally matched to 100Ω. Must use external DC blocks.

RFIN_A-

RFIN_B-

Channel B RF differential input. Internally matched to 100Ω. Must use external DC blocks.

RFIN_B+

No internal connection. It is highly recommended that this pin be connected to a ground via that is located as

close to the pin as possible.

RFIN_C+

Channel C RF differential input. Internally matched to 100Ω. Must use external DC blocks.

RFIN_C-

RFIN_D-

Channel D RF differential input. Internally matched to 100Ω. Must use external DC blocks.

RFIN_D+

16, 17, 21,

23, 25, 46,

48, 50, 54, 55

VCC

Power supply. Must place the bypass capacitor as close to the pin as possible.

RSET_3

Connect external resistor to GND to optimize amplifier performance. Refer to Table 12, Bill of Materials (BOM).

RDSET_3

Connect external resistor to GND to optimize amplifier performance. Refer to Table 12, Bill of Materials (BOM).

STBY_D

Standby channel D. With Logic LOW applied to this pin (or if the pin is left unconnected), channel D enters STBY

mode and is powered off. With Logic HIGH applied to this pin, channel D is powered on and is fully operational.

RSET_4

Connect external resistor to GND to optimize amplifier performance. Refer to Table 12, Bill of Materials (BOM).

RDSET_4

Connect external resistor to GND to optimize amplifier performance. Refer to Table 12, Bill of Materials (BOM).

RFOUT_D

RF output D internally matched to 50Ω. Must use external DC block.

STBY_C

Standby channel C. With Logic LOW applied to this pin (or if the pin is left unconnected), channel C enters STBY

mode and is powered off. With Logic HIGH applied to this pin, channel C is powered on and is fully operational.

RFOUT_C

RF output C internally matched to 50Ω. Must use external DC block.

CSb

Serial chip select. CSb pin can be pulled up to VCC and down to GND. 1.8 V and 3.3 V logic compatible.

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