Cirrus-logic CS5529 Manuel d'utilisateur

1Copyright © Cirrus Logic, Inc. 2005(All Rights Reserved)http://www.cirrus.comCS552916-bit, Programmable ∆Σ ADC with 6-bit LatchFeaturesz Delta-sigma

CS552910 DS246F5GENERAL DESCRIPTIONThe CS5529 is a 16-bit ∆Σ Analog-to-Digital Con-verter (ADC) which includes coarse/fine chargebuffers, a fourth ord

CS5529DS246F5 11ages. The differential voltage between VREF+ andVREF- sets the nominal full scale input span of theconverter. For a single-ended refer

CS552912 DS246F5Command Register DescriptionsPerform Single ConversionThis command instructs the ADC to perform a single conversion.Perform Continuous

CS5529DS246F5 13SYNC1Part of the serial port re-initialization sequence (see text for use of command).SYNC0End of the serial port re-initialization se

CS552914 DS246F5Command Time8 SCLKsData Time 24 SCLKs(or 72 SCLKs for Set-up Registers)Write CycleCSSCLKSDIMSBLSBCommand Time8 SCLKsCSSCLKSDIData Time

CS5529DS246F5 15Serial Port InitializationThe serial port is initialized to the command modewhenever a power-on reset is performed or whenthe port ini

CS552916 DS246F5running. This allows the converter to quickly returnto the normal or low power mode once the PS/R bitis set back to a logic 0. If D4 i

CS5529DS246F5 17Port FlagThe port flag bit in the configuration register allowsthe user to select the mode in which conversionswill be presented to th

CS552918 DS246F5Gain Register The gain register span is from 0 to (4-2-22). After Reset the (MSB-1) bit is ‘1’, all other bits are ‘0’.The gain calibr

CS5529DS246F5 19tions). If a system gain calibration is performed, thecalibrated input must not cause the resulting gainregister’s content, decoded in

CS55292 DS246F5TABLE OF CONTENTSCHARACTERISTICS & SPECIFICATIONS ... 4ANALOG CHARACTERISTICS

CS552920 DS246F5Configuration Register Descriptions D23(MSB) D22 D21 D20 D19 D18 D17 D16 D15 D14 D13 D12A1 A0 D3 D2 D1 D0 NU LPM WR2 WR1 WR0 U/BD11

CS5529DS246F5 21Performing ConversionsThe CS5529 offers two modes of performing con-versions: single conversion and continuous conver-sions. The secti

CS552922 DS246F5SDO flag falls. For instance, the user can just readthe conversion data register again to exit the contin-uous conversion mode.Note: 1

CS5529DS246F5 23Power Supply ArrangementsThe CS5529 is designed to operate from single ordual analog supplies and a single digital supply.The followin

CS552924 DS246F5analog supplies and a +3 V to +5 V digital supplyto measure ground referenced bipolar signals. Fig-ure 12 illustrates the CS5529 conne

CS5529DS246F5 25Getting StartedThe CS5529 has many features. From a softwareprogrammer’s perspective, what should be donefirst? To begin, a 32.768 kHz

CS552926 DS246F5PIN DESCRIPTIONSClock GeneratorXIN; XOUT - Crystal In; Crystal Out, Pins 10, 11.A gate inside the chip is connected to these pins and

CS5529DS246F5 27A0, A1 - Logic Outputs (Analog), Pin 5, 6.The logic states of A0-A1 mimic the states of the D22-D23 bits of the configuration register

CS552928 DS246F5SPECIFICATION DEFINITIONSLinearity ErrorThe deviation of a code from a straight line which connects the two end points of the A/DConve

CS5529DS246F5 29ORDERING INFORMATIONENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION * MSL (Moisture Sensitivity Level) as specified by IPC/JE

CS5529DS246F5 3LIST OF FIGURESInput models for AIN+ and AIN- pins... 11Input model for VREF+ and

CS552930 DS246F5PACKAGE DIMENSIONS INCHES MILLIMETERSDIM MIN MAX MIN MAXA 0.000 0.210 0.00 5.33A1 0.015 0.025 0.38 0.64A2 0.115 0.195 2.92 4.95b 0.014

CS5529DS246F5 31Notes: 1. “D” and “E1” are reference datums and do not included mold flash or protrusions, but do include mold mismatch and are measur

CS55294 DS246F5CHARACTERISTICS & SPECIFICATIONSANALOG CHARACTERISTICS (TA = 25 °C; VA± = ±2.5 V ±5%, VD+ = 5 V ±5%, VREF+ = 2.5 V, VREF- = 0.0 V,

CS5529DS246F5 5ANALOG CHARACTERISTICS (Continued)Notes: 7. See the section of the data sheet which discusses Analog Input Models.8. The minimum Full S

CS55296 DS246F55V DIGITAL CHARACTERISTICS (TA = 25 °C; VA± = ±2.5V ±5%, VD+ = 5V ± 5%.)(See Notes 2 and 11.)Notes: 11. All measurements performed und

CS5529DS246F5 7ABSOLUTE MAXIMUM RATINGS (DGND = 0 V) (See Note 13.)Notes: 13. All voltages with respect to ground.14. VA+ and VA- must satisfy {(VA+)

CS55298 DS246F5SWITCHING CHARACTERISTICS (TA = 2 5 ° C ; V A ± = ± 2. 5 V ± 5% , V D+ = 3 V ±5 % or 5 V ±5 % ; In

CS5529DS246F5 9Continuous Running SCLK Timing (Not to Scale)CSSCLKt3t6t2t1SDI Write Timing (Not to Scale)CSSCLKMSBMSB-1LSBSDIt3t6t4 t5 t1t2SDO Read Ti