AFE7901 datasheet(9/160 Pages) TI

9 / 160 page

Table 6-1. Pin Functions (continued)

BALL NAME

BALL NUMBER

TYPE(1)

DESCRIPTION

VDD1P2FB

D14, D15, D16, E15, U14,

U15, U16, T15

—

1.2-V supply for FB ADCs.

VDD1P8FB

C15, C16, V15, V16

—

1.8-V supply for FB ADC.

VDD1P8FBCLK

A14, A17, Y17, Y14

—

1.8-V supply for FB ADC clock.

VDD1P2PLLCLKREF

K20, K18, L18

—

1.2-V supply for PLL.

VDDPLL1P2FBCML

L15

—

1.2-V supply for PLL clock distribution to FB ADC.

VDDPLL1P2RXCML

K15

—

1.2-V supply for clock distribution to RX ADC.

VDD1P8PLL

K16, L16

—

1.8-V supply for PLL.

VDD1P8PLLVCO

L20

—

1.8-V supply for PLL/VCO. This is a sensitive net and

requires extra care in layout.

VDD1P2RX

A10, A13, E11, E12, E13,

E14,F11, F12, F13, R11, R12,

R13, T11, T12, T13, T14,

Y10, Y13

—

1.2-V supply for RX ADCs.

VDD1P8RX

C9, C10, C11, D9, D10, D11,

E9, E10, F8, F9, F10, R8, R9,

R10, T9, T10, U9, U10, U11,

V9, V10, V11

—

1.8-V supply for RX ADCs.

VDD1P8RXCLK

A6, A9, Y6, Y9

—

1.8-V supply for RX ADC clocks.

VDD1P2TXENC

D17, U17

—

1.2-V supply for DAC encoder.

VDD1P2TXCLK

A20, D20, U20, Y20

—

1.2-V supply for DAC clock.

VDD1P8TX

E20, H20, N20, T20

—

1.8-V supply for DAC.

VDD1P8TXDAC

G17, H17, N17, P17

—

1.8-V supply for DAC.

VDD1P8GPIO

H6, N6

—

1.8-V supply for GPIO.

VDDA1P8

F3, F4, H3, H4, R3, R4, N3,

—

SerDes analog 1.8-V power supply.

VDDT0P9

D3, D4, U3, U4

—

SerDes digital 0.9-V power supply.

GROUNDS

DGND

J5, J6, J7, J8, J9, J10, J11,

J12, M5, M6, M7, M8, M9,

M10, M11, M12

—

Digital core ground

VSSGPIO

H5, N5

—

GPIO ground.

VSSFB

B14, B15, B16, B17, C14,

V14, W14, W15, W16, W17

—

Ground for FB ADC supply.

VSSFBCLK

A18, B18, W18, Y18

—

Ground for FB ADC 1.8-V clock supply.

GND_ESD

D7, D8, J13, M13, U7, U8

—

Ground for ESD protection circuits.

VSSRX

B7, B8, B10, B11, B12, C12,

D12, B13, C13, D13, W7,

W8, W10, W11, W13, U12,

V12, W12, U13, V13

—

Ground for RX ADC.

VSSRXCLK

A5, B5, B6, B9, C7, C8, W5,

W6, W9, Y5, V7, V8

—

Ground for RX ADC clocks.

VSSTX

B19, C17, C18, C19, D18,

E18, E19, F17, F18, F19,

G18, G19, H18, H19, J20,

M20, N18, N19, P18, P19,

R17, R18, R19, T18, T19,

U18, V17, V18, V19, W19

—

Ground for TX DAC.

VSSTXENC

E16, E17, T16, T17

—

Ground for TX DAC encoder.

VSSTXCLK

A19, D19, U19, Y19

—

Ground for TX DAC clock.

VSSPLL

M19

—

Ground for PLL.

VSSPLLFBCML

J16, M16

—

Ground for FB ADC clock.

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