CS5321 datasheet(16/38 Pages) CIRRUS

16 / 38 page

CS5320/21/22

DS454PP1

2. GENERAL DESCRIPTION

The CS5320 and CS5321 are fourth-order CMOS

monolithic analog modulators designed specifical-

ly for very high resolution measurement of signals

between dc and 1500 Hz. Configuring the CS5320

or CS5321 with the CS5322 FIR filter results in a

high resolution A/D converter system that performs

sampling and A/D conversion with dynamic range

exceeding 120 dB .

The CS5320 and CS5321 use a fourth-order over-

sampling architecture to achieve high resolution

A/D conversion. The modulator consists of a 1-bit

A/D converter embedded in a negative feedback

loop. The modulator provides an oversampled seri-

al bit stream at 256 kbits per second (HBR=1) and

128 kbits per second (HBR=0) operating with a

clock rate of 1.024 MHz. Figure 18 illustrates the

CS5320/CS5321 Block Diagram.

The CS5322 is a monolithic digital Finite Impulse

Response (FIR) filter with programmable decima-

tion. The CS5322 and CS5320/CS5321 are intend-

ed to be used together to form a unique high

dynamic range ADC chipset. The CS5322 provides

the digital anti-alias filter for the CS5320/CS5321

modulator output. The CS5322 consists of: a multi-

stage FIR filter, four registers (status, data, offset,

and configuration), a flexible serial input and out-

put port, and a 2-channel input data multiplexer

that selects data from the CS5320/CS5321 (MDA-

TA) or user test data (TDATA). The CS5322 deci-

mates (64x to 4096x) the output to any of seven

selectable up-date periods: 16, 8, 4, 2, 1, 0.5 and

0.25 milliseconds. Data is output from the digital

filter in a 24-bit serial format. Figure 19 illustrates

the CS5322 Block Diagram.

Figure 18. CS5320/21 Block Diagram

AINR

Vdd1

Osc.

Detect

AIN+

AIN-

VREF+

VREF-

D/A

A/D

Digital

Control

MDATA

Clock

Generation

MSYNC

MCLK

HBR

MFLG

OFST

LPWR

Vss1

AGND

Vdd2

Vss2

DGND

CS5321 数据表(PDF) 16 Page - Cirrus Logic

CS5321 数据表(HTML) 16 Page - Cirrus Logic

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

数据表下载