ADIN1110BCPZ-R7 datasheet(10/107 Pages) AD

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Data Sheet

ADIN1110

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

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Rev. B | 10 of 107

Table 8. Pin Function Descriptions (Hardware Pin Configuration Groupings Are Subject to Change) (Continued)

Pin No.

Mnemonic1

Description

TXN

Transmit Negative Pin.

RXN

Receive Negative Pin.

RXP

Receive Positive Pin.

TXP

Transmit Positive Pin.

Configuration/Status

LED_0

Programmable LED Indicator for General-Purpose LED. The LED is active low. The LED can be active

high or active low. By default, LED_0 is configured to turn on when a link is established and blink when

there is activity. See the LED Functions section.

LINK_ST

Link Status Output. LINK_ST indicates whether a valid link is established. LINK_ST is active high.

LED_1

Programmable LED Indicator for General-Purpose LED. The LED can be active high or active low. By

default, LED_1 is disabled. See the LED Functions section.

TX2P4_EN2

Transmit Level Amplitude Hardware Configuration Pin. Set high for 1.0 V p-p transmit amplitude only.

Set low to support both 1.0 V p-p and 2.4 V p-p transmit amplitude. See Table 15.

SWPD_EN2

Software Power-Down Configuration. Set low to configure PHY to enter software power-down mode

after power-up/reset. See Table 13.

LDOs and REFERENCE

CEXT_2

External Decoupling for Band Gap Voltage Reference. Connect a 0.1 μF capacitor to ground as close as

possible to this pin. Do not use this pin as a voltage source for an external circuit.

CEXT_3

External Decoupling for LDO Circuit. Connect a 1 μF capacitor to ground as close as possible to this

pin. Do not use this pin as a voltage source for an external circuit.

Power and Ground Pins

16, 17

AVDD_H

Analog Supply Voltage for the Various Analog Circuits in the Device. This supply rail can be supplied by

1.8 V to 3.3 V depending on the transmit level configuration. If AVDD_H is 3.3 V, both 1.0 V p-p and

2.4 V p-p transmit operating modes are supported. If AVDD_H is 1.8 V only, only 1.0 V p-p transmit

operating mode is supported. Connect 0.1 μF and 0.01 μF capacitors to GND as close as possible to

this pin.

AVDD_L

Analog Supply Voltage for the Internal LDO Circuits. This supply rail can be supplied by 1.8 V to 3.3

V. AVDD_L can be connected direct to the AVDD_H rail in long reach applications or to an alternative

lower voltage rail when the device is configured with dual supplies for lower power consumption.

Connect 0.1 μF and 0.01 μF capacitors to GND as close as possible to this pin.

DLDO_1P1

Digital Core 1.1 V Power Supply Output Pin. Connect a 0.68 μF capacitor to GND as close as possible

to the pin. When using the internal LDO regulator, connect this pin directly to the DVDD_1P1 pin.

DVDD_1P1

Input Pin for 1.1 V DVDD_1P1 Supply Rail. When using the internal LDO regulator, connect this pin

directly to the DLDO_1P1 pin. Alternatively, an external 1.1 V rail can be provided to the pin for greater

power efficiency. Connect a 0.1 μF capacitor to GND as close as possible to the pin.

VDDIO

3.3 V, 2.5 V, or 1.8 V Digital Power for SPI. Connect 0.1 μF and 0.01μF capacitors to GND as close as

possible to the pin.

Exposed Pad. This GND paddle must be connected to ground. The LFCSP package has an exposed

pad that needs to be connected to GND for electrical reasons and must be soldered to a metal plate on

the PCB for mechanical reasons. A 4 × 4 array of thermal vias beneath the exposed GND pad is also

recommended.

Other Pins

10, 11, 18, 21, 28, 32, 34, 36,

DNC

Do Not Connect. These pins must be left open circuit.

TEST1

This pin requires a 1.5 kΩ pull-up resistor to VDDIO.

TEST2

This pin must be left open circuit.

1 Where a pin is shared between a functional signal and a hardware pin configuration, the hardware pin configuration signal is listed last and the pin is referred to using the

functional signals name throughout the data sheet.

2 All of the hardware configuration pins have internal pull-down resistors. The default mode of operation without any external resistors connected to these pins is shown in

Table 11. If an alternative mode of operation is required, use 4.7 kΩ pull-up resistors.

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