ADC32RF44IRMPR datasheet(52/135 Pages) TI2

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ADC32RF44

SBAS809A – FEBRUARY 2017 – REVISED MARCH 2017

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Device Functional Modes (continued)

(1)

In full rate output, the two LSBs are truncated to a 12-bit output.

9.4.2.2 JESD204B Frame Assembly

The JESD204B standard defines the following parameters:

•

F is the number of octets per frame clock period

•

L is the number of lanes per link

•

M is the number of converters for the device

•

S is the number of samples per frame

9.4.2.3 JESD204B Frame Assembly in Bypass Mode

Table 14 lists the available JESD204B formats and valid ranges for the ADC32RF44. The ranges are limited by

the SerDes line rate and the maximum ADC sample frequency. The sample alignment for the bypass modes on

the different lanes is shown in Table 15.

Table 14. JESD Mode Options: Bypass Mode

DECIMATION

SETTING

(Complex)

OUTPUT

RESOLUTION

(Bits)

12-BIT

MODE

PLL

MODE

JESD

MODE

JESD

MODE

JESD

MODE

MAX fCLK

(Gsps)

RATIO

[fSerDes / fCLK

(Gbps / GSPS)]

Bypass

12(1)

16X

2.6

20X

2.5

(1)

Blue shading indicates channel A and yellow shading indicates channel B.

Table 15. JESD Sample Lane Alignments: Bypass Mode(1)

OUTPUT

LANE

LMFS = 8224

LMFS = 82820

DA0

A0[13:6]

A0[5:0], 00

A0[11:4]

A0[3:0],

A1[11:8]

A1[7:0]

A2[11:4]

A2[3:0],

A3[11:8]

A3[7:0]

A4[11:4]

A4[3:0],

0000

DA1

A1[13:6]

A1[5:0], 00

A5[11:4]

A5[3:0],

A6[11:8]

A6[7:0]

A7[11:4]

A7[3:0],

A8[11:8]

A8[7:0]

A9[11:4]

A9[3:0],

0000

DA2

A2[13:6]

A2[5:0], 00

A10[11:4]

A10[3:0],

A11[11:8]

A11[7:0]

A12[11:4]

A12[3:0],

A13[11:8]

A13[7:0]

A14[11:4]

A14[3:0],

0000

DA3

A3[13:6]

A3[5:0], 00

A15[11:4]

A15[3:0],

A16[11:8]

A16[7:0]

A17[11:4]

A17[3:0],

A18[11:8]

A18[7:0]

A19[11:4]

A19[3:0],

0000

DB0

B0[13:6]

B0[5:0], 00

B0[11:4]

B0[3:0],

B1[11:8]

B1[7:0]

B2[11:4]

B2[3:0],

B3[11:8]

B3[7:0]

B4[11:4]

B4[3:0],

0000

DB1

B1[13:6]

B1[5:0], 00

B5[11:4]

B5[3:0],

B6[11:8]

B6[7:0]

B7[11:4]

B7[3:0],

B8[11:8]

B8[7:0]

B9[11:4]

B9[3:0],

0000

DB2

B2[13:6]

B2[5:0], 00

B10[11:4]

B10[3:0],

B11[11:8]

B11[7:0]

B12[11:4]

B12[3:0],

B13[11:8]

B13[7:0]

B14[11:4]

B14[3:0],

0000

DB3

B3[13:6]

B3[5:0], 00

B15[11:4]

B15[3:0],

B16[11:8]

B16[7:0]

B17[11:4]

B17[3:0],

B18[11:8]

B18[7:0]

B19[11:4]

B19[3:0],

0000

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