Cirrus-logic CS5566 Bedienungsanleitung

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Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright Cirrus Logic, Inc. 2009
(All Rights Reserved)
http://www.cirrus.com
5/4/09
CS5566
±2.5 V / 5 V, 5 kSps, 24-bit
ΔΣ
ADC
Features & Description
Differential Analog Input
On-chip Buffers for High Input Impedance
Conversion Time = 200 μS
Settles in One Conversion
Linearity Error = 0.0005%
Signal-to-Noise = 110 dB
24 Bits, No Missing Codes
Simple three/four-wire serial interface
Power Supply Configurations:
- Analog: +5V/GND; IO: +1.8V to +3.3V
- Analog: ±2.5V; IO: +1.8V to +3.3V
Power Consumption: 20 mW @ 5 kSps
General Description
The CS5566 is a single-channel, 24-bit analog-to-digital
converter capable of 5 kSps conversion rate. The input
accepts a fully differential analog input signal. On-chip
buffers provide high input impedance for both the AIN in-
puts and the VREF+ input. This significantly reduces the
drive requirements of signal sources and reduces errors
due to source impedances. The CS5566 is a delta-sigma
converter capable of switching multiple input channels at
a high rate with no loss in throughput. The ADC uses a
low-latency digital filter architecture. The filter is designed
for fast settling and settles to full accuracy in one conver-
sion. The converter's 24-bit data output is in serial form,
with the serial port acting as either a master or a slave. The
converter is designed to support bipolar, ground-refer-
enced signals when operated from ±2.5V analog supplies.
The converter can operate from an analog supply of 0-5V
or from ±2.5V. The digital interface supports standard log-
ic operating from 1.8, 2.5, or 3.3 V.
ORDERING INFORMATION:
See Ordering Information on page 30.
AIN+
AIN-
CS
SCLK
SMODE
VREF+
VREF-
RDY
OSC/CLOCK
GENERATOR
CONV
BP/UP
DIGITAL CONTROL
SERIAL
INTERFACE
ADC
DIGITAL
FILTER
LOGIC
VL
MCLK
SDO
RST
SLEEP
TST
DCR
V1-
V2-
BUFEN
V2+
V1+
CS5566
VLR
VLR2
MAY ‘09
DS806PP2
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Inhaltsverzeichnis

Seite 1 - 2.5 V / 5 V, 5 kSps, 24-bit

Preliminary Product InformationThis document contains information for a new product.Cirrus Logic reserves the right to modify this product without not

Seite 2 - TABLE OF CONTENTS

CS556610 DS806PP25/4/09 DIGITAL CHARACTERISTICSTA = TMIN to TMAX; VL = 3.3V, ±5% or VL = 2.5V, ±5% or 1.8V, ±5%; VLR = 0V DIGITAL FILTER CHARACTERISTI

Seite 3 - LIST OF TABLES

CS5566DS806PP2 115/4/09GUARANTEED LOGIC LEVELSTA=-40to+85°C;V1+=V2+=+2.5V, ±5%; V1- = V2- = -2.5 V, ±5%;VL - VLR = 3.3 V, ±5%, 2.5 V, ±5%, or 1.8 V, ±

Seite 4 - ANALOG CHARACTERISTICS T

CS556612 DS806PP25/4/09RECOMMENDED OPERATING CONDITIONS(VLR = 0V, see Note 17)17. The logic supply can be any value VL – VLR = +1.71 to +3.465 volts a

Seite 5 - (CONTINUED) T

CS5566DS806PP2 135/4/092. OVERVIEWThe CS5566 is a 24-bit analog-to-digital converter capable of 5 kSps conversion rate. The device is ca-pable of swi

Seite 6 - SWITCHING CHARACTERISTICS

CS556614 DS806PP25/4/093.1 Converter OperationThe converter should be reset after the power supplies and voltage reference are stable.The CS5566 conv

Seite 7 - MSB MSB–1

CS5566DS806PP2 155/4/093.2 Power ConsumptionThe power consumption of the CS5566 converter is a function of the conversion rate. Figure 6 illustratest

Seite 8

CS556616 DS806PP25/4/093.3 ClockThe CS5566 can be operated from its internal oscillator or from an external master clock. The state ofMCLK determines

Seite 9

CS5566DS806PP2 175/4/093.5 Analog InputThe analog input of the converter is fully differential with a peak-to-peak input of 4.096 volts on each input

Seite 10 - DIGITAL CHARACTERISTICS

CS556618 DS806PP25/4/093.7 Typical Connection DiagramsThe following figure depicts the CS5566 powered from bipolar analog supplies, +2.5 V and - 2.5

Seite 11 - GUARANTEED LOGIC LEVELS

CS5566DS806PP2 195/4/09The following figure depicts the CS5566 device powered from a single 5V analog supply. Figure 9. CS5566 Configured Using a Sin

Seite 12 - ABSOLUTE MAXIMUM RATINGS

CS55662 DS806PP25/4/09TABLE OF CONTENTS1. CHARACTERISTICS AND SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Seite 13 - 3. THEORY OF OPERATION

CS556620 DS806PP25/4/093.8 AIN & VREF Sampling StructuresThe CS5566 uses on-chip buffers on the AIN+, AIN-, and the VREF+ inputs. Buffers provide

Seite 14 - 3.1 Converter Operation

CS5566DS806PP2 215/4/09Figure 11 through Figure 16 illustrate the performance of the converter with various input signal magni-tudes. -180-160-140-1

Seite 15 - 3.2 Power Consumption

CS556622 DS806PP25/4/09Figure 16 illustrates the device with a small signal 1/1,000,000 of full scale. The signal input for Figure 16is about 8.2 micr

Seite 16 - 3.3 Clock

CS5566DS806PP2 235/4/093.10 Digital Filter CharacteristicsThe digital filter is designed for fast settling, therefore it exhibits very little in-band

Seite 17 - 3.6 Output Coding Format

CS556624 DS806PP25/4/093.11 Serial PortThe serial port on the CS5566 can operate in two different modes: synchronous self clock (SSC) mode &synch

Seite 18 - ±2.5V Analog Supplies

CS5566DS806PP2 255/4/093.12 Power Supplies & GroundingThe CS5566 can be configured to operate with its analog supply operating from 5V, or with i

Seite 19 - DS806PP2 19

CS556626 DS806PP25/4/094. PIN DESCRIPTIONS CS – Chip Select, Pin 1The Chip Select pin allows an external device to access the serial port. If SMODE =

Seite 20 - 3.9 Converter Performance

CS5566DS806PP2 275/4/09BP/UP – Bipolar/Unipolar Select, Pin 11The BP/UP pin determines the span and the output coding of the converter. When set high

Seite 21 - DS806PP2 21

CS556628 DS806PP25/4/09SCLK – Serial Clock Input/Output, Pin 23The SMODE pin determines whether the SCLK signal is an input or an output signal. SCLK

Seite 22 - 22 DS806PP2

CS5566DS806PP2 295/4/095. PACKAGE DIMENSIONSNotes: 1.“D” and “E1” are reference datums and do not included mold flash or protrusions, but do include

Seite 23 - Frequency (Hz)

CS5566DS806PP2 35/4/09LIST OF FIGURESFigure 1. Converter Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Seite 24 - 3.11 Serial Port

CS556630 DS806PP25/4/096. ORDERING INFORMATION 7. ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION* MSL (Moisture Sensitivity Level) as spec

Seite 25 - DS806PP2 25

CS55664 DS806PP25/4/091. CHARACTERISTICS AND SPECIFICATIONS• Min / Max characteristics and specifications are guaranteed over the specified operating

Seite 26 - 4. PIN DESCRIPTIONS

CS5566DS806PP2 55/4/09ANALOG CHARACTERISTICS (CONTINUED) TA = -40 to +85 °C; V1+ = V2+ = +2.5 V, ±5%; V1- = V2- = -2.5 V, ±5%; VL -VLR = 3.3 V, ±5%;

Seite 27

CS55666 DS806PP25/4/09SWITCHING CHARACTERISTICS TA= -40 to +85 °C; V1+ = V2+ = +2.5 V, ±5%; V1- = V2- = -2.5 V, ±5%;VL - VLR = 3.3 V, ±5%, 2.5 V, ±5%,

Seite 28

CS5566DS806PP2 75/4/09SWITCHING CHARACTERISTICS (CONTINUED) TA=-40to+85°C;V1+=V2+=+2.5V, ±5%; V1- = V2- = -2.5 V, ±5%;VL - VLR = 3.3 V, ±5%, 2.5 V, ±5

Seite 29 - 24L SSOP PACKAGE DRAWING

CS55668 DS806PP25/4/09SWITCHING CHARACTERISTICS (CONTINUED) TA=-40to+85°C;V1+=V2+=+2.5V, ±5%; V1- = V2- = -2.5 V, ±5%;VL - VLR = 3.3 V, ±5%, 2.5 V, ±5

Seite 30 - 8. REVISION HISTORY

CS5566DS806PP2 95/4/09SWITCHING CHARACTERISTICS (CONTINUED) TA=-40to+85°C;V1+=V2+=+2.5V, ±5%; V1- = V2- = -2.5 V, ±5%;VL - VLR = 3.3 V, ±5%, 2.5 V, ±5

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