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Cirrus Logic

CS5376A Datasheet Preview

CS5376A Datasheet

Low-power Multi-channel Decimation Filter

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CS5376A
Low-power, Multi-channel Decimation Filter
Features
Description
z 1- to 4-channel Digital Decimation Filter
ΠMultiple On-chip FIR and IIR Coefficient Sets
ΠProgrammable Coefficients for Custom Filters
ΠSynchronous Operation
z Selectable Output Word Rate
Π4000, 2000, 1000, 500, 333, 250 SPS
Π200, 125, 100, 50, 40, 25, 20, 10, 5, 1 SPS
z Digital Gain and Offset Corrections
z Test DAC Bit-stream Generator
ΠDigital Sine Wave Output
z Time Break Controller, General Purpose I/O
z Secondary SPI™ Port, Boundary Scan JTAG
z Microcontroller or EEPROM Configuration
z Small-footprint, 64-pin TQFP Package
z Low Power Consumption
Π9 mW per Channel at 500 SPS
z Flexible Power Supplies
ΠI/O Interface: 3.3 V or 5.0 V
ΠDigital Logic Core: 3.0 V, 3.3 V or 5.0 V
I
The CS5376A is a multi-function digital filter utilizing a
low-power signal processing architecture to achieve ef-
ficient filtering for up to four ∆Σ modulators. By
combining the CS5376A with CS3301A/02A differential
amplifiers, CS5371A/72A ∆Σ modulators, and the
CS4373A ∆Σ test DAC a synchronous, high-resolution,
self-testing, multi-channel measurement system can be
designed quickly and easily.
Digital filter coefficients for the CS5376A FIR and IIR fil-
ters are included on-chip for a simple setup, or they can
be programmed for custom applications. Selectable dig-
ital filter decimation ratios produce output word rates
from 4000 SPS to 1 SPS, resulting in measurement
bandwidths ranging from 1600 Hz down to 400 mHz
when using the on-chip coefficient sets.
The CS5376A includes integrated peripherals to simplify
system design: offset and gain corrections, a test DAC
bit stream generator, a time-break controller, 12 gener-
al-purpose I/O pins, a secondary SPI port, and a
boundary scan JTAG port.
ORDERING INFORMATION
See page 106.
Serial Data Output Port
Decim ation and
Filtering Engine
JTAG
Interface
M odulator Data
Interface
Clock and
S yn c h ro n iz a tio n
SPI 1
Serial Peripheral Interface 1
Tim e Break Controller
Test Bit Stream Controller
G PIO
General Purpose I/O
SPI 2
Serial Peripheral Interface 2
CLK
SYNC
M CLK
M SYNC
SSI
SCK1
M ISO
MOSI
S IN T
TIM EB
TBSCLK
TBSDATA
G PIO 11:EECS
G PIO 10
G PIO 9
G PIO 8
G PIO 7
G PIO 6
G PIO 5
G PIO 4:CS4
G PIO 3:CS3
G PIO 2:CS2
G PIO 1:CS1
G PIO 0:CS0
SCK2
SO
S I1
S I2
S I3
S I4
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2008
(All Rights Reserved)
SEP ‘08
DS612F4




Cirrus Logic

CS5376A Datasheet Preview

CS5376A Datasheet

Low-power Multi-channel Decimation Filter

No Preview Available !

CS5376A
TABLE OF CONTENTS
1. General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1. Digital Filter Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
1.2. Integrated Peripheral Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1.3. System Level Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1.4. Configuration Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2. Characteristics and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 13
Specified Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Thermal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Digital Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Power Consumption. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Switching Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
3. System Design with CS5376A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.1. Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.2. Reset Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.3. Clock Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3.4. Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3.5. System Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3.6. Digital Filter Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3.7. Data Collection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3.8. Integrated peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
4. Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.1. Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
4.2. Bypass Capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
4.3. Power Consumption. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
5. Reset Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1. Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
5.2. Reset Self-Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
5.3. Boot Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
6. Clock Generation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.1. Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.2. Synchronous Clocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.3. Master Clock Jitter and Skew. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
7. Synchronization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.1. Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
7.2. MSYNC Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
7.3. Digital Filter Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
7.4. Modulator Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
7.5. Test Bit Stream Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
8. Configuration By EEPROM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8.1. Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
8.2. EEPROM Hardware Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
8.3. EEPROM Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
8.4. EEPROM Configuration Commands . . . . . . . . . . . . . . . . . . . . . . . . . . .28
8.5. Example EEPROM Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
9. Configuration By Microcontroller . . . . . . . . . . . . . . . . . . . . . . . . . . 32
DS612F4
2


Part Number CS5376A
Description Low-power Multi-channel Decimation Filter
Maker Cirrus Logic
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CS5376A Datasheet PDF






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