CS5378
Low-power Single-channel Decimation Filter
Features
Description
The CS5378 is a multi-function digital filter utilizing a low-
power signal processing architecture to achieve efficient
filtering for a delta-sigma-type modulator. By combining
the CS5378 with a CS3301/02 differential amplifier, a
CS5371 modulator, and a CS4373 test DAC, a synchro-
nous high-resolution measurement system can be
designed quickly and easily.
z Single-channel Digital Decimation Filter
Multiple On-chip FIR and IIR Coefficient Sets
Programmable Coefficients for Custom Filters
Synchronous Operation
z Integrated PLL for Clock Generation
1.024 MHz, 2.048 MHz, or 4.096 MHz Input
Standard Clock or Manchester Input
z Selectable Output Word Rate
4000, 2000, 1000, 500, 333, 250 SPS
200, 125, 100, 50, 40, 25, 20, 10, 5, 1 SPS
z Digital Gain and Offset Corrections
z Test DAC Bit-stream Generator
Sine Wave or Impulse Output Mode
z Time Break Controller, General-purpose I/O
z Microcontroller or EEPROM Configuration
z Small-footprint, 28-pin SSOP Package
z Low Power Consumption
Digital filter coefficients for the CS5378 FIR and IIR filters
are included on-chip for a simple setup, or they can be
programmed for custom applications. Selectable digital
filter decimation ratios produce output word rates from
4000 SPS to 1 SPS, resulting in measurement band-
widths ranging from 1600 Hz down to 400 mHz when
using the on-chip coefficient sets.
The CS5378 includes integrated peripherals to simplify
system design: a low-jitter PLL for standard clock or
manchester inputs, offset and gain corrections, a test
DAC bit stream generator, a time break controller, and
eight general-purpose I/O pins.
16 mW at 500 SPS OWR
z Flexible Power Supplies
I/O Interface and PLL: 3.3 V or 5.0 V
ORDERING INFORMATION
See page 86.
Digital Logic Core: 2.5 V, 3.3 V or 5.0 V
I
CLK
PLL, Clock Generation
MCLK
Serial Interface
RESET
Reset, Synchronization
Time Break Controller
SYNC
MSYNC
TIMEB
Decimation and
Filtering Engine
Test Bit Stream
Controller
TBSDATA
GPIO7:BOOT
GPIO6:PLL2
GPIO5:PLL1
GPIO4:PLL0
GPIO3
GPIO
General Purpose I/O
Modulator Data Interface
GPIO2
GPIO1
GPIO0
Copyright © Cirrus Logic, Inc. 2005
OCT ‘05
DS639F1
http://www.cirrus.com
(All Rights Reserved)