Data Sheet

ADGM3144

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

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Rev. 0 | 9 of 30

Figure 6. ADGM3144 Pin Configuration

Table 6. Pin Function Descriptions

Pin No.

Mnemonic

Description

1

VDD

Positive Power Supply Input. For the recommended input voltage see Table 1. Place a 0.1μF decoupling capacitor to GND

as close to this pin as possible. The decoupling capacitor should be rated to at least 16V DC.

2, 4, 6, 7, 8, 9, 11, 12, 13,

14, 16, 18

GND

Ground Return.

3

RF4

RF4 Port. This pin can be an input or an output. If the pin is unused, it is recommended to either terminate it with a

50Ω resistor to GND (to prevent resonances in high-speed and RF applications) or tie it directly to GND (for DC-only

applications).

5

RF3

RF3 Port. This pin can be an input or an output. If the pin is unused, it is recommended to either terminate it with a

50Ω resistor to GND (to prevent resonances in high-speed and RF applications) or tie it directly to GND (for DC-only

applications).

10

RFC

Common RFC Port. This pin can be an input or an output.

15

RF2

RF2 Port. This pin can be an input or an output. If the pin is unused, it is recommended to either terminate it with a

50Ω resistor to GND (to prevent resonances in high-speed and RF applications) or tie it directly to GND (for DC-only

applications).

17

RF1

RF1 Port. This pin can be an input or an output. If the pin is unused, it is recommended to either terminate it with a

50Ω resistor to GND (to prevent resonances in high-speed and RF applications) or tie it directly to GND (for DC-only

applications).

19

PIN/SPI

Parallel Mode Enable/SPI Mode Enable. The SPI interface is enabled when this pin is high, and the parallel interface (IN1,

IN2, IN3, IN4) is enabled when this pin is low.

20

IN1/SDO

Parallel Logic Digital Control Input 1 (IN1). The voltage applied to this pin controls the gate of the RF1 to RFC MEMS

switch. In SPI mode, this pin is the serial data output (SDO) pin.

21

IN2/SCLK

Parallel Logic Digital Control Input 2 (IN2). The voltage applied to this pin controls the gate of the RF2 to RFC MEMS

switch. In SPI mode, this pin is the serial clock (SCLK) that synchronizes the target device(s) to the controller device.

22

IN3/CS

Parallel Logic Digital Control Input 3 (IN3). The voltage applied to this pin controls the gate of the RF3 to RFCB MEMS

switch. In SPI mode, this pin is the chip select (CS). CS is an active low signal that selects the target device with which the

controller device intends to communicate.

23

IN4/SDI

Parallel Logic Digital Control Input 4 (IN4). The voltage applied to this pin controls the gate of the RF4 to RFCB MEMS

switch. In SPI mode, this pin is the serial data input (SDI).

24

VCP

Driver IC output. This pin outputs 80V DC. Place a 0.1nF decoupling capacitor to GND as close to this pin as possible. The

decoupling capacitor should be rated to at least 100V DC.

EP

Exposed Pad. EP is internally connected to GND. Connect this pad to GND.