ref: 2010v253.doc QX2010 data sheet -- preliminary -- confidential date: 97.01.29 rev: 2.53 qsound labs, inc. page 1 of 7 device specifications - preliminary information QX2010 qxpander processor general description the qxpander QX2010 is a bipolar analog stereo enhancement processor. this device is part of the qx chip family offered by qsound labs, and uses the patented qxpander ? technology to produce a spatially widened stereo image from ordinary left and right channel inputs. this audio enhancement is achieved while using normal stereo signals and standard stereo audio equipment. no special initial encoding of the input signals is required, no additional speakers are required, and no special hardware is needed to produce qxpanded audio. a ttl-compatible control input is provided to select qxpanded audio or a normal stereo signal (bypass). the QX2010 is fabricated in bipolar technology, and is offered in a 22 pin sdip standard package. a 20 pin plastic ssop package is available on request. features produce a wide sound image from normal stereo input. no encoding of input signals, no special equipment required to qxpand audio. ttl-compatible bypass control. low noise: 55 uv rms . high signal-to-noise ratio: 85 db. single supply voltage. few external components, low cost. applications television sound systems (stereo). semi-professional audio equipment. personal/portable audio. multimedia applications for pcs and laptops. multimedia speaker systems. video games. pin assignment rin byp fb1 fb2 fb3 fb4 fb5 fb6 rout gnd lout fa6 fa5 fa4 fa3 fa2 fa1 vref lin vcc 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 figure 1 : ssop pinout rin byp fb1 fb2 fb3 nc fb4 fb5 fb6 rout gnd lout fa6 fa5 fa4 fa3 nc fa2 fa1 vref lin vcc 16 15 14 13 17 18 19 20 21 22 12 7 8 9 10 6 5 4 3 2 1 11 figure 2 : sdip pin assignment
QX2010 qxpander processor device specifications ref: 2010v253.doc QX2010 data sheet -- preliminary -- confidential date: 97.01.29 rev: 2.53 qsound labs, inc. page 2 of 7 principles of operation. in ordinary stereo systems, the stereo image is formed between the left and right speakers, and is confined by the speaker positions (i.e., the "sound stage" is located between the two speakers). the qxpander ? is designed to form the stereo image beyond the speakers, thus enlarging the "sound stage". if the center channel is defined as the monaural or common component of the left and right channels, then figure 3 shows the spatial response of the qxpander ? when operating, and for normal stereo bypass. figure 3 : qxpander ? spatial response the qxpander ? enhancements can be disabled using the byp bypass control pin, allowing the unchanged stereo signal to pass through to the outputs. the byp control pin requires v cc and 0 vdc as logic levels 1 and 0 respectively (see table 1 ). byp mode 0 (gnd) bypass - normal stereo 1 (2.4 ~ v cc ) qxpanded audio table 1 : mode selection normally, the qxpander ? is used in the preamplifier stage between the stereo source and the amplifier stages used to drive the speakers. figure 4 shows the functional elements of the QX2010. spatial enhancement stereo in l r l r stereo out stereo switch byp pre amp power amp figure 4 : qxpander ? simplified block diagram qsound applications engineers can assist customers in integrating the QX2010 into their application designs.
QX2010 qxpander processor device specifications ref: 2010v253.doc QX2010 data sheet -- preliminary -- confidential date: 97.01.29 rev: 2.53 qsound labs, inc. page 3 of 7 1 2 3 4 a b c d 4 3 2 1 d c b a title size: number: date: file: revision: sheet of time: a drawn by: c1 1000 pf + c5 47uf + c6 22 uf c11 0.1 uf + c7 22 uf + c8 22 uf r3 120k r4 33k c12 0.1 uf rchout lchout + c9 22 uf + c10 22 uf r5 68k r6 160k r7 120k c2 1000 pf c3 1000 pf r8 150k r9 68k r10 10k c4 1000 pf r11 150k s1 rchin lchin r12 68k r13 68k qxpander processor QX2010-s20c 1 4.0 1 vcc vcc notes: r3, r5 - r13: tolerance: +/- 1% type: metal film c1 - c4: tolerance: +/- 5% temperature coefficient: 0 +/- 60ppm/c byp: stereo bypass byp = 0 qxpanded audio byp = 1 rin lin rout lout qxpander processor vcc fa1 fa2 fa3 fa4 fa5 fa6 vref fb6 fb5 fb4 fb3 fb2 fb1 byp audio 20 17 16 15 14 13 12 10 3 4 5 6 7 8 18 11 9 1 19 2 u1 QX2010-s20c kls figure 5 : QX2010 qxpander ? typical application
QX2010 qxpander processor device specifications ref: 2010v253.doc QX2010 data sheet -- preliminary -- confidential date: 97.01.29 rev: 2.53 qsound labs, inc. page 4 of 7 absolute maximum ratings * (t a = +25 c) parameter symbol rating unit supply voltage v cc,max 12 v input voltage v in,max gnd v in v cc v output current i c,max 10 ma power dissipation p d 500 mw operating temperature t opr -20 ~ +75 c storage temperature t stg -40 ~ +125 c warning: operation of the device at or beyond these limits may result in permanent damage to the device. normal operation is not guaranteed at these extremes. digital characteristics (t a = +25 c, v cc = 6.0 ~ 10.0 vdc) parameter tc sym min typ max unit high-level input voltage v ih 2.5 5.0 v low-level input voltage v il 0 0.4 0.8 v high-level input current i ih tbd ua low-level input current i il tbd ua note: digital input (byp, pin 2) should be driven with levels between 0v ~ +5v relative to gnd.
QX2010 qxpander processor device specifications ref: 2010v253.doc QX2010 data sheet -- preliminary -- confidential date: 97.01.29 rev: 2.53 qsound labs, inc. page 5 of 7 analog characteristics : (t a = +25 c, v cc = 9.0 vdc) parameter tc sym min typ max unit supply voltage range v cc 6.0 9.0 10.0 vdc power supply rejection ratio 1 psrr 44 50 db supply current i cc 15 20 ma input voltage, analog 2 v in 1.0 1.4 v rms output voltage, analog 3 v out 2.0 2.8 v rms output current, analog i out 1 ma load resistance r l 5 k w load capacitance c l 100 pf input impedance r i 21 30 39 k w usable bandwidth bw 20 20000 hz voltage gain, qxpanded 4 a v,1 5.0 6.0 7.0 db voltage gain, bypass 5 a v,2 -0.5 0.0 +0.5 db total harmonic distortion 6 thd 0.3 0.7 % signal-noise ratio, qxpander 7 snr 80 85 db signal-noise ratio, bypass 8 snr 90 95 db output noise voltage 9 v noise 55 100 m v rms channel balance 10 cb -1.0 +1.0 db insertion loss 0.5 db test conditions: 1. v cc = 9v + 200 mv rms ,f = 1 khz, byp = v cc (qxpanded mode). 2. v cc = 9.0 v, byp = v cc (qxpanded mode). 3. byp = v cc (qxpanded mode), thd = 1%, f = 1 khz. 4. byp = v cc (qxpanded mode), a) lin = 1 v rms ,1 khz, rin=0 v, b) rin= 1 v rms ,1 khz, lin=0 v. 5. byp = gnd (bypass mode), lin = rin = 1 v rms ,1 khz. 6. total harmonic distortion: a) thd at lout: lin = 1 v rms , rin = 0 v, 1 khz, byp = v cc (qxpanded mode). b) thd at rout: rin = 1 v rms , lin = 0 v, 1 khz, byp = v cc (qxpanded mode). 7. bw = 20 ~ 20000 hz, lout = rout = 1 v rms , byp = v cc , a curve.(qxpanded mode). 8. bw = 20 ~ 20000 hz, lin = rin = 1 v rms , byp = gnd, a curve. (bypass mode). 9. bw = 20 ~ 20000 hz, byp = v cc , a curve. (qxpanded mode). 10. lin = rin = 1 v rms , 1 khz, byp = gnd (bypass mode).
QX2010 qxpander processor device specifications ref: 2010v253.doc QX2010 data sheet -- preliminary -- confidential date: 97.01.29 rev: 2.53 qsound labs, inc. page 6 of 7 bill of material for low cost implementation item quantity description reference 1 1 10 k w , 1/4w, 5%, carbon film resistor r10 2 1 33 k w , 1/4w, 5%, carbon film resistor r4 3 2 120 k w , 1/4w, 5%, carbon film resistor r3, r7 4 2 130 k w , 1/4w, 5%, carbon film resistor r9 or r13, r5 or r12 5 2 150 k w , 1/4w, 5%, carbon film resistor r8, r11 6 1 160 k w , 1/4w, 5%, carbon film resistor r6 7 4 0.001 uf, 5%, 50v, ceramic disk capacitor c1, c2, c3, c4 8 2 0.1uf. 50v. 10% capacitor c11, c12 9 5 22.0uf, 16v electrolytic capacitor c6, c7, c8, c9, c10 10 1 47.0uf, 16v electrolytic capacitor c5 11 1 qx2130sdip integrated circuit u1 note: these values are suitable for applicatons where cost is an overriding factor. operation within quoted specifications cannot be guaranteed using the parts listed above. when strict conformance to the quoted specifications is required use the values indicated on the schematic.
QX2010 qxpander processor device specifications ref: 2010v253.doc QX2010 data sheet -- preliminary -- confidential date: 97.01.29 rev: 2.53 qsound labs, inc. page 7 of 7 package data ordering code package code package type QX2010-p22c p22 plastic sdip QX2010-s20c s20 plastic ssop 8.0 0~15 0.25 plastic sdip 22 lead 300 mil 0.070 pitch units: mm p22 6.5 3.5 3.3 19.2 0.42 1.0 1.78 0.70 20 11 10 1 8.90.3 1.8 0.05 0.05 0.36 0.50.2 0.150.1 0~0.1 5.4 0.2 7.8 0.3 0~10 s20 plastic ssop 20 lead 300 mil 0.030 pitch units: mm 0.8
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