CS5378 datasheet(6/86 Pages) CIRRUS

6 / 86 page

CS5378

DS639F1

1. GENERAL DESCRIPTION

The CS5378 is a single channel digital filter with

integrated system peripherals. Figure 1 illustrates a

simplified block diagram of the CS5378.

1.1 Digital Filter Features

•

Single channel decimation filter for CS5371

∆Σ

modulator.

•

Synchronous operation for simultaneous sam-

pling in multi-sensor systems.

Internal synchronization of digital filter

phase to an external SYNC signal.

•

Output word rates, including low bandwidth

rates.

Standard output rates: 4000, 2000, 1000,

500, 333, 250 SPS.

Low bandwidth rates: 200, 125, 100, 50,

40, 25, 20, 10, 5, 1 SPS.

•

Flexible digital filter configuration. (See Figure

Cascaded SINC, FIR, and IIR filters with

selectable output stage.

Linear and minimum phase FIR low-pass

filter coefficients included.

3 Hz Butterworth IIR high-pass filter coef-

ficients included.

FIR and IIR coefficients programmable to

create a custom filter response.

•

Digital gain correction to normalize sensor

gain.

•

Digital offset correction and calibration.

Offset correction to remove measurement

Serial Interface

Decimation and

Filtering Engine

Modulator Data Interface

Test Bit Stream

Controller

Reset, Synchronization

TBSDATA

Time Break Controller

GPIO

General Purpose I/O

SYNC

MSYNC

TIMEB

GPIO5:PLL1

GPIO4:PLL0

GPIO3

GPIO2

GPIO1

GPIO0

GPIO6:PLL2

GPIO7:BOOT

RESET

CLK

MCLK

PLL, Clock Generation

Figure 1. CS5378 Block Diagram

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