CXD1088AQ SONY | Alldatasheet
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SONY. CXD1088AQ Over Sampling Digital Filter LSI Description Package Outline Unit: mm CXD1088AQ is a digital filter LSI with quadrupled sampling rate, developed for com- 44 pin QFP pact disc player. tase \\ pe 173% Features zal | © 83rd and 21st order filters linked through cas- GARARARDREA | = cade connections provide a quadrupled sam- Mt OE Fa pling digital filter = ES 333| . © Built-in filters for 2 channels corresponding to =| Ee 38 Land R = 6 Fe | © Variety of functions including soft-muting and ee ong offset addition th ay © 83rd and 21st order filters also have 2 modes ‘LJossoa _[g'sses 0.181 of filter coefficients each, to enable the selec- ER) tion of the most suitable filter characteristics, required for usage. OFP-44P-101 Functions © Filters for two channels © Filtering with a quadrupled sampling rate © Two-stage FIR filters interconnected in cascade (83rd order+21st order) © 18-bit serial output possible © Switching between serial and parallel output modes © 41% offset addition © Soft-muting function © Independent linear error correction for either L_ or R, up to 8 words © 2 modes of coefficients provided for both 83rd and 21st orders (refer to “Filter Characteristics”) © input/output format Input: 2's complement; MSB first (serial) Output: 2's complement; MSB first (serial) Offset binary (parallel) Structure Silicon gate CMOS IC Absolute Maximum Ratings (Ta=—25 to +75°C) ® Supply voltage Voo —0.5 to +6.5 Vv © Input voltage vi -0.5 to Voo +0.5 v © Storage temperature Tstg —55 to +150 °c © Allowable power Po 450 (Ta=75°C) mw dissipation Recommended Operating Conditions © Supply voltage Voo 45 to 5.5 v © Operating temperature Topr. -20 to +75 °C OSC frequency fx 10 to 20 MHz
SONY, cxp1088Aa Pin Configuration (Top View) xn n LAU — a DODO Block Diagram Rom. Rom @) Hot @) o =i | OFsT LB ovo. (-) MUTE &) arre (2) FORM Los @) ones i © vata r@ c2P0 @ trck e 28 © scx OO, hh @) air 525 x 8 f 2 33
SONY, xD1088A0 Pin Description Te fome [eT ee Sie | output mode is selected. |e [ves [= [Weanivepoversunpwi@viSSSSSC~*Y [7 [mare iY as oer“ or anal vane eae Wie —* [2 [rr [1 [resp nome eariwd [2 [sort [71 [sor ming OWOFFovicn Ona! a a [12 [oror [1 [Reverses the poverty ofinput data [1 [ence [ot Pemex tnpuepin [_t [oara [1 | -tetiex2” seat data input pin: Ze complement [ws [ace [1 [eckinpwt pin be eo ts ag [7 [vie [ = [Poste versus [Te [reste [1 [Tesi aed CS [2 | ow [1 [ROW wing rsa rr tert Chvaserses"T [20 | none [1 [ROW ving ors rer tro “te Greate) [rt [orsr [7 | as an otro the supt savest Wwe [2 [oro [1 | Sos ep ofeteetvouan We riR EY [2 [ores [1 [ nese wot eg ft for SONY fort ol pus WP ODRH"T [ae [ron [ect te oupatoman Ws so | [scx [0 [Semcon ouputorenenicicais)—SSSSC~* [2 [rout [0 | ouput pin otensatoscoton cre as) CC*S a [ae [wes [= [negnivepoversemowios CCS [afar [0 [apenueseetterfehomet Ci [fan [0 [Awnueceectornenmd OO SSSSCSCS~*Y Ne [2 [wo fo lincemawe TS SSC—S D, (MSB) output pin when the paratlel output mode is selected; BCK (4fs) output pin when the [= | Sted sens Sense teen | Ba bl >= ale output mode is selected. PP ia output pin when the serial output mode is selected. posers [> spires ere | output mode is selected | [ve |= [rosie poveranpy eo P| aa ‘output mode is selected —375—
SONY. CXD1088AQ
Electrical Characteristics
DC characteristics Voo=4.5 to 5.5V, Ta=—20 to +75°C [se [tom [svmeot | conation mins [ tym, [Mex] uni] “H" input 7,9,10 to 16, | “L" input Vu v 1910 | voltage 2431 “H” output Vou Voo-0.5 v voltage “L" output Vor v voltage 2105, | “H” output | Vou y 36 to 38, | voltage 40,44 | “L” output Vou Io=1mA v voltage “H” output Von Voo-1.0 v voltage “L" output Vow Io=5mA v voltage Current Under no load: Vi=Voo/0V, mA ‘consumption fx=16.93MH2 AC characteristics Voo=4.5 to 5.5V, Ta= ~20 to +75°C [tense [non [om [ne [om [enna enon foe | me | a [ Waput Bek eavency | foe | [= f= fa ne | Input BOK pulse wicth [wm | [of - [= || [=| = [=f [= [== CL =50pF — 376 —
SONY, CxD1088AQ Bek a mc PO 1 Se ee, tar sum Lack —— 0, (Bcx) == 200 1D, (DATA) CD unek’ Functions Soft muting Mutes or de-mutes output data within approximately 23ms (1024/fs). The output level can be held during muting operation. ( fal i om —— CITT sD sor woo ——S OLS Fig. 1 Offset Adds an offset to the output data. The offset amount can be positive or negative. Table 1 || [ort | oro | oie onan | pe f= [| a Le Te fm | — 377 —
SONY, cxp1088Aa Muting When MUTE goes high or INIT goes low, the output is muted. An offset value which has been set following Table 1 above is output. Data polarity Allows switching between inversion and non-inversion of output data polarity. When DPOL level is “L”: the output data is not inversed with respect to the input data. When DPOL level is “H”: the output data is inversed with respect to the input data. Error correction Errors in an input data block consisting of up to eight consecutive data units can be linearly cor- rected by the two correct data units, the one preceding the erroneous block and the other following it. (This is done separately for L and R.) For errors of more than eight consecutive input data units, only the last eight data are linearly corrected, and all preceding data units are maintained without correction. os SSS eb wan c2Po="t- ‘, ©: Data afer correction s\\cs \\\\e \\cr y So Linear | Preceding value holding ee (€rror fag) Input and output 1) Input The changeover point of MSB first serial data (fs) of 2's complement represents the switching of LRCK. Of this data string, only the data of the last 16-bit clock (BCK) are valid. When INIT="L" (resetting), the input data are invalid and the input is equivalent to ALL “0.” 2) Output SP=“L": MSB first serial data (4fs) of 2's complement SP=“H": offset binary parallel data (4fs) Clock pulses such as LRO and BCK are constantly output as long as the power is on. Data are output only when resetting is canceled (INIT="H”) when MUTE=“L.” Otherwise, muting remains effective. — 378 —
SONY. cxo1088Aa O e |e U veka! Hs < 4 i. 210 210 0 es | J 4 2 oe Bel cB 3 5 is g E IE g le a e ce ne | 98 7 a: a d a4 . 0 H _PHR 0 é 2 7 E-22. #oz¢ D> vie 2 fgegg ge 5 £ gx Sic 8552 F858 € Bane 2 gekh $555 faa8 a is ° ° g — 379 —
SONY, cxb10884a Combined Filter Characteristics (1st filter + 2nd filter) 1) ROM1=“H* Stop band attenuation: 80dB Min. (over 25.7kHz) Pass band ripple: +0.001dB Max. o — wp Nt 8 » pL eg NR On WN Fey a 8 a -of———-L jt -o F————L jt -o f———-L jf tt -%0 n Mm ZN A ° 20 «0 Cy 0 100 (kHz) 2) ROM1=“L" Stop band attenuation: 60dB Min. (24.1kHz); 65dB Min. (over 24.2kHz) Pass band ripple: +0.004dB Max. o PT 0 a en ee 20 Lt = ———L ft 5-0 a Se Ss 2 a aN =n = my TE ~~~ 90 ‘aa ws OLZN A ° 20 o 6 80 100 flkHz) 381 —
SONY, cxo1088aa. Filter Characteristics-1 ‘1st Filter (83rd order, ROM1="H") Frequency characteristics of filter a a sn SN Sn NE Fy i ee ee en ee en = ! | | I Fa ak ene een Oe a ee ie ee ee ee ee é $n pm nnn SE eel DG Pr CO 90 b a a fr fa ° 10 2 20 « 0 f(kHz) Ripple characteristics in pass band ome I I { 1 0.000 “ ee ee as os eas | I I I - 0.008 = a 3 -o012 a SE ER 4-—--—— 2 tow Pp « ] | | | Se 0.096 ° 5 10 6 2 25 f{kHz) — 382 —
SONY, cxo1088Aa Filter Characteristics-2 Ist Filter (83rd order, ROM1=“L") Frequency characteristics of filter Fe a a | a 2B fp fn Fe nn a ON g eg eee ee ee ee é ieee nn en ae a a a es ee eee e171! ay “0 UY AY V ° 10 20 30 ry 50 (kHz) Ripple characteristics in pass band oe | | I 7 0.000 a a a Ge ee Soe kJ | ! I | H -oo0 NSN LA /_\\ = ‘ /\\ fH —- 20.082 fp fp 0.036 ° 5 10 6 20 % {kHz} — 383 —
2nd Filter (21st order, ROM2="H") © Marked flatness in pass band (without frequency characteristics compensation) Frequency characteristics of filter = i ee
3 Se a ee
3 1 | I I 2 2A) Pf pF tn Fs eg ee ee Ce é | | ! | Sa Sk aes ee Sa ee ey 20 ai LN A ° 20 “0 6 80 100 fikHz) Ripple characteristics in pass band nn 1 T 1 1 Sal (an a
20212 Pp pn pp
3 0.220 Se ee F] 20228 me fpf a a a ee a Sa 0.240 ° 5 10 6 20 25 fikHz) —384—
A SSsSsSssSsSSSSSSSSSSSSSSSSsSsS SONY. xo1088Aa, ——— SSS Filter Characteristics-4 2nd Filter (21st order, ROM2="L”) Pass band frequency characteristics (compensation of aperture effect of analog third order Bessel filter characteristics) Frequency characteristics of filter of
3 HB np pe
« Tf HD np 280 pe tT * Nat ° 20 “0 cy 0 100 fikHz) Ripple characteristics in pass band {Excluding frequency characteristics compensation) “ 1 i 1 ] Rt Pm mpm fp _ TPN me fp pt = | | |
3 FPR fp fp
« FRR fp fee -2212 mata poa nado 41 ——| oe a nn -2.220 ° 5 10 6 20 2s flkHtz) | | — 385 —
SONY CORP/COMPONENT PRODS 18E D MM 8382383 OOOOLOL 3 mm Sony Package Product Name 7-90-20 Package name Type Package ane P | 254mm Through . iE MY | auosns | Hele PACKAGE 2 ¢ Lead SINGLE Through sup | IN LINE rl 2st uy | Hele PACKAGE mal coo) | eg 2G ZAG 254mm Through Standard | Z1P | IN LINE Td teu Hole } PACKAGE inline _| “04 & | PIN Through PGA | GRID Hole L | ARRAY Lead = — | pack | BACK a ae (woomiy | pend i SHRINK : Through pci spip | DUAL 178mm Shrink SDIP | Wy LINE << PY) “con | Het PACKAGE Suet | QuaD a QFp | FLAT B Ae Standard flat PACKAGE iis package SMALL: atmm OUTLINE a 2direction PACKAGE ar (somtL) VERY SMALL |. vare | quan <p> 03mm ving 4-direction Shrink flat PACKAGE package VERY SMALL . j OUTLINE a 965mm E PACKAGE g PLASTIC a pioc | LEIpEP S} Jebend | ¢-direction Standard chip CARRIER carrier LEAD LESS ne 127mm Lee | cHiP & | ame ay | bead tess CARRIER SHRINK | SPLCC PLASTIC 1.27mm Max, CRADED SOMIL Max) , SMALL Standard OUTLINE 127mm 2direction | SO} | PoEAD (sent chip carrier PACKAGE *PePlastic, Con-Ceramic . —3-—