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QX2014 SDIP-22A - Datasheet Archive
QXpanderTM Processor Device Specifications - Preliminary Information · General Description The QXpanderTM QX2014 is a
QX2014 QX2014 QXpanderTM Processor Device Specifications - Preliminary Information · General Description The QXpanderTM QX2014 QX2014 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 technique to produce a spatial or widened stereo image from ordinary left and right channel inputs. This audio enhancement is achieved using normal stereo signals and standard audio playback equipment including two ordinary speakers. The 2014 has a TTL-compatible QEN/BYP control to select between QXpander enhancement and normal stereo audio. In addition, an analog "spread" control pin provides for continuous adjustment of the degree of expansion. User adjustment may be implemented using a simple single-gang potentiometer. Fabricated using bipolar technology and available in plastic 22 pin SDIP and 18 pin SOP packages. Other package options may be offered upon request. Applications · Television sound systems (Stereo) · Personal, portable & home entertainment audio systems · Desktop and laptop PC audio systems · Multimedia speaker systems · Video Games systems Pin Assignment Figure 1: SOP pin assignment Features · · · · · · · Produces a wide sound image from normal stereo input No encoding of input signals or special output equipment is required TTL-compatible QXpander/Bypass mode selection User-adjustable enhancement level Power down output Low Noise: 15 µVrms Few external components; low cost Ref: 2014v100.doc Rev: 1.00 Figure 2: SDIP pin assignment QX2014 QX2014 Data Sheet - Preliminary QSound Labs, Inc. Date: 99.04.2107 Page 1 of 6 QX2014 QX2014 QXpander Processor Device Specifications 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 2 represents the spatial response of the QXpander at a typical setting of the spread control, vs the normal image width of stereo in bypass mode. For simple QXpander/Bypass selection, the B/Q control pin is a TTL-compatible input. B/Q 0 1 Output Bypass QXpander Table 2: QXpander/Bypass Mode Selection Power down output. The voltage of the capacitor at VREF is approximately half of supply voltage and is compared with the internal Vcc supply. The comparator output goes high when the internal Vcc supply drops below the voltage maintained at the capacitor at VREF. This signal may be used to latch a power down mute function for an output amplifier. Normally, the QXpander is used in the preamplifier stage between the stereo source and the amplifier stages used to drive the speakers. The QXpander enhancements can be disabled using the bypass control allowing the unchanged stereo signal to pass through to the amplifier stages. Figure shows the functional elements of the QX2014 QX2014. Figure 3: QXpander Spatial Response The degree of QXpander enhancement can be controlled via the SPC and QIN pins, most conveniently by connecting a singlegang 50k linear pot between SPC and ground, with the wiper AC coupled to QIN through a 2.2µF electrolytic capacitor. (See typical application schematic.) L Stereo In R QXpander Spatial Enhancement Stereo Switch L Stereo Out R SPREAD QEN/BYP QIN Coupling Capacitor GND SPC Spread Min Max Figure 4: QXpanderTM Simplified Block Diagram Table 1: Spread Control Ref: 2014v100.doc Rev: 1.00 QX2014 QX2014 Data Sheet - Preliminary QSound Labs, Inc. Date: 99.04.2107 Page 2 of 6 QX2014 QX2014 QXpander Processor Device Specifications 1 2 4 3 To output mute latch D D 3 2 VCC SW1 Bypass C6 + C13 0.1uF 1 QSound R5 10K 10uF + C5 47uF C 16 2 3 18 4 C C12 10nF Lin C7 Lout 8 + 5 + + P2A R1 R2 9 10 QF1 QF6 B R3 10K R2 16K5 (1%) R4 18K 15 U1 QX2014 QX2014 SPC QF2 6 11 B 7 22uF GND 14 R6 50K Spread Control Rout 22uF Right Output QF3 CCW - Min 2.2uF CW - Max 13 Right Input QIN QF4 C11 12 C4 2.2uF QF5 R1 R2 QX2014 QX2014 QXpander Processor Rin L2 Left Output C8 1 P1A L1 + PNR B/Q 17 + C3 2.2uF Left Input DET L2 VREF P2B L1 VCC P1B R1 18K C2 10nF C1 10nF A NOTES: Resistor Tolerance: +/- 5%; except R2: +/-1% C1, C2 Monolithic ceramic: +/- 10% 1 A 2 3 4 Figure 5: QX2014 QX2014 QXpander Typical Application QSound applications engineers can assist customers in integrating the QX2014 QX2014 into their application designs. Ref: 2014v100.doc Rev: 1.00 QX2014 QX2014 Data Sheet - Preliminary QSound Labs, Inc. Date: 99.04.2107 Page 3 of 6 QX2014 QX2014 QXpander Processor Device Specifications TA = +25 °C Absolute Maximum Ratings* Parameter Symbol Rating Unit Supply Voltage VCC,max 13 V Input Voltage VIN,max V GND VIN VCC Output Current IO,max 10 mA Power dissipation Pd 350 mW Operating Temperature Topr -20 ~ +75 °C Storage Temperature Tstg -20 ~ +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. Recommended Operating Conditions Parameter Supply Voltage Operating Temperature Symbol VCC,op Topr Rating 4.5 ~ 12.0 -20 ~ +75 Unit V °C Analog Characteristics: (VCC = 9V, TA = +25 °C, Vbyp = 5V, LIN=RIN=0VRMS, unless otherwise specified.) Parameter TC Sym Min Typ Max Supply Current ICC 16 22 Input Impedance RI 21 30 39 Input Voltage, Analog,1 1 Vin,1 0.75 0.9 Input Voltage, Analog,2 2 Vin,2 0.4 0.55 Voltage Gain, QXpander,1 3 Gqx,1 8.5 9.5 10.5 Voltage Gain, QXpander,2 4 Gqx,2 4 5 6 Voltage Gain, QXpander,3 5 Gqx,3 8.5 9.5 10.5 Voltage Gain, QXpander,4 6 Gqx,4 4 5 6 Voltage Gain, Bypass,1 7 Gby,1 -1 0 +1 Voltage Gain, Bypass,2 8 Gby,2 -1 0 +1 Total Harmonic Distortion, QXpander 9 THDqx 0.1 0.3 Total Harmonic Distortion, Bypass 10 THDby 0.03 0.15 Output Noise Voltage, QXpander 11 Vno,qx 15 35 Ref: 2014v100.doc Rev: 1.00 QX2014 QX2014 Data Sheet - Preliminary QSound Labs, Inc. Unit mA k VRMS VRMS dB dB dB dB dB dB % % µVRMS Date: 99.04.2107 Page 4 of 6 QX2014 QX2014 QXpander Processor Parameter Output Noise Voltage, Bypass Signal-Noise Ratio, QXpander Signal-Noise Ratio, Bypass Channel Balance BYP Terminal Voltage, H BYP Terminal Voltage, L BYP Terminal Current, H BYP Terminal Current, L Load Resistance Load Capacitance Usable Bandwidth Device Specifications TC 12 13 14 15 16 17 Sym Vno,by SNR SNR CB Vby,h Vby,l Iby,h Iby,l RL CL BW Min 90 95 -1.0 2.1 0 Typ 10 95 99 0 Max 25 +1.0 VCC 0.7 350 -10 10 20 1000 20000 Unit µVRMS dB dB dB V V µA µA k pF Hz Test Conditions: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. f=1kHz, LIN and RIN 0° phase difference, and output voltage T.H.D. no greater than 1%. f=1kHz, LIN and RIN 180° phase difference, and output voltage T.H.D. no greater than 1%. LIN=1 VRMS, 1 kHz, RIN=0 V, at LOUT. LIN=1 VRMS, 1 kHz, RIN=0 V, at ROUT. LIN=0 V, RIN=1 VRMS, 1 kHz, at ROUT. LIN=0 V, RIN=1 VRMS, 1 kHz, at LOUT. LIN=1 VRMS, 1 kHz, RIN=0 V, VBYP=0V, at LOUT. LIN=0 V, RIN=1 VRMS, 1 kHz, VBYP=0V, at ROUT. Total Harmonic Distortion (THD) at LOUT and ROUT (QXpander active): a) LIN = 1 VRMS , RIN = 0 V. b) LIN = 0 V, RIN = 1 VRMS. Test Condition 8, VBYP = 0V (Bypass) BW = 20 ~ 20000 Hz, LIN = RIN = 0 V, A curve, QXpander active: at LOUT and ROUT. BW = 20 ~ 20000 Hz, LIN = RIN = 0 V, A curve, VBYP = 0 V (Bypass): at LOUT and ROUT. LIN = RIN = 1 VRMS , 1 kHz, VBYP = 0 V (Bypass), ROUT - LOUT (R - L). High-level input voltage of BYP terminal, QXpander mode, maximum spread Low-level input voltage of BYP terminal, Bypass mode, no spread (normal stereo). Input current of BYP terminal, VBYP=5V Input current of BYP terminal, VBYP=0V Ref: 2014v100.doc Rev: 1.00 QX2014 QX2014 Data Sheet - Preliminary QSound Labs, Inc. Date: 99.04.2107 Page 5 of 6 QX2014 QX2014 QXpander Processor Device Specifications Package Information Figure 6: SOP-18A Package Option . Figure 7: SDIP-22A SDIP-22A Package Option Note: All dimensions in millimetres. Other package options may be offered upon request Ref: 2014v100.doc Rev: 1.00 QX2014 QX2014 Data Sheet - Preliminary QSound Labs, Inc. Date: 99.04.2107 Page 6 of 6