FS32R274VCK2MMM datasheet(34/78 Pages) NXP

34 / 78 page

Table 26. Sigma Delta ADC Parameters (continued)

Symbol

Parameter

Condition

Min

Typ

Max

Unit

Characterized under the following conditions:

• 0.6 Vpp (i.e. -6 dBFS) input signals

applied at the following frequencies one

at a time: 20.77 KHz, 317.7 KHz, 857.7

KHz, 1.411 MHz, 2.95 MHz, 3.897

MHz, and 4.997 MHz and the SNR in

dBFS is then calculated.

• SNR at 5 MHz will be reduced by 5 dB

due to decimation filter roll off.

• The SNR is specified to be 67 dBFS

typical for input frequencies between 20

KHz and 4 MHz. Mismatch shaper on.

SNDRSDA_MM_ON1 Signal-to-Noise-and-

Distortion Ratio

Mismatch Shaper on

Input Frequency Range and integration

bandwidth are from 20 KHz to 5 MHz. (using

full-bandwidth decimation filter coefficients).

Production test frequencies 449 KHz and 4

MHz. Production test amplitude is -6 dBFS =

0.6 Vpp.

Characterized under the following conditions:

• 0.6 Vpp (i.e. -6 dBFS) input signals

applied at the following frequencies one

at a time: 20.77 KHz, 317.7 KHz, 857.7

KHz, 1.411 MHz, 2.95 MHz, 3.897

MHz, and 4.997 MHz and the SNDR in

dBFS is then calculated.

• SNR at 5 MHz will be reduced by 5 dB

due to decimation filter roll off.

• The SNR is specified to be 64 dBFS

typical for input frequencies between 20

KHz and 4 MHz. Mismatch shaper on.

—

dBFS

IFDRSDA

Interference Free

Dynamic Range

20 ms integration, ADC inputs tied together at

the package pin. One side of the AC coupling

capacitors associated with each input should

remain connected to the ADC input and the

other side of the capacitor should connected

to ground.

—

dBFS

IMDSDA_MM_ON

Intermodulation

Distortion Mismatch

Shaper on

Input Frequency Range and integration

bandwidth are from 20 KHz to 5 MHz (using

full-bandwidth decimation filter coefficients).

Characterized under the following conditions:

• Two distinct sets of signal pairs at the

specified frequencies and at an

amplitude of -8 dBFs (i.e. 0.23886

Vpeak = 0.47772 Vpp differential) are

applied one signal pair at a time.

• Signal pair #1 is f1 = 1 MHz and f2 =

1.1 MHz and signal pair #2 is f1 =

390.625 KHz and f2 = 546.875 KHz.

• All inter modulation products are

checked. Mismatch Shaper on.

—

dBc

Gain Mismatching

(ADCx to ADCy)

-3.5

—

3.5

Input Offset Error

—

-25

—

Table continues on the next page...

Analog modules

S32R274/S32R264 Series Data Sheet, Rev. 6, 06/2021

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FS32R274VCK2MMM Datasheet(PDF) 34 Page - NXP Semiconductors

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