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QX2011

型号：

QX2011

品牌：

ETC[ ETC ]

页数：

6 页

PDF大小：

112 K

下载PDF手册
QX2011  
QXpander Processor  
Device Specifications - Preliminary Information  
General Description  
•
•
•
Low noise: 60 uVRMS.  
single supply voltage, internal reference.  
Few external components, low cost.  
The QXpander™ QX2011 is a bipolar analog  
stereo enhancement processor. This device  
is part of the QX chip family offered by  
QSound Labs, and uses the patented  
Applications  
QXpander™ technology to produce  
a
•
•
•
•
Television sound systems (Stereo).  
spatially widened stereo image from  
ordinary left and right channel inputs.  
Semi-professional audio equipment.  
Personal/portable audio.  
Multimedia applications for PCs and  
laptops.  
Multimedia speaker systems.  
Video Games.  
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.  
•
•
Pin Assignment  
1
2
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
12  
RIN  
VREF  
FB1  
FB2  
FB3  
FB4  
FB5  
FB6  
FB7  
VCC  
LIN  
3
BYP  
FA1  
FA2  
FA3  
FA4  
FA5  
FA6  
LOUT  
ROUT  
4
5
The 2011 has a TTL-compatible bypass  
control to select between QXpander  
enhancement and normal stereo audio. An  
analog “spread” control is provided to vary  
the amount of QXpander enhancement. The  
QX2011 is fabricated in bipolar technology,  
and is offered in plastic 22 pin SDIP and 24  
pin SSOP packages.  
6
7
8
9
10  
11  
FB8  
GND  
Figure 1: SDIP-22 Pin Assignment  
1
2
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
RIN  
VREF  
FB1  
FB2  
FB3  
FB4  
FB5  
FB6  
FB7  
VCC  
LIN  
Features  
3
BYP  
FA1  
FA2  
FA3  
FA4  
FA5  
FA6  
NC2  
LOUT  
ROUT  
4
•
•
•
•
Produce a wide sound image from  
normal stereo input.  
No encoding of input signals, no special  
equipment required to QXpand audio.  
TTL-compatible  
control.  
user adjustable enhancement level.  
5
6
7
8
9
10  
11  
12  
NC1  
FB8  
GND  
enhancement/bypass  
Figure 2: SSOP-24 Pin Assignment  
Ref: 2011V011.DOC  
Revision: 0.11  
Preliminary  
Date: 97.03.26  
Page 1 of 6  
Note: The device data in these specifications are based on engineering samples, and are preliminary. QX2011 specifications are  
subject to change without notice.  
QX2011 QXpander Processor  
Device Specifications  
QSound Labs  
Principles of Operation.  
For simple QX/bypass selection, the BYP  
control input is TTL-compatible and can be  
directly driven by logic.  
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".  
VBYP  
0 V  
≥2.1  
MODE  
Bypass - Normal Stereo  
QXpander enhanced  
Table 2: 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 QX2011.  
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.  
Power Amp  
Pre Amp  
L
Stereo Out  
R
L
Stereo  
Switch  
Spatial  
Enhancement  
Stereo In  
R
BYP  
Figure 4: QXpander™ Simplified Block Diagram  
Figure 3: QXpander™ Spatial Response  
QSound applications engineers can assist  
customers in integrating the QX2011 into  
their application designs.  
The amount of QXpander™ enhancement  
can be controlled with the FB7 and FB8  
control pins. The “spread” control allows  
continuous variable adjustment from  
maximum QXpander enhancement down to  
normal  
stereo  
signal  
(bypass).  
A
potentiometer or a voltage divider/decoder  
pair (for digital systems) is used to set the  
enhancement (see Figure 5).  
RVREF,FB8 RFB7,FB8  
QXpander  
Minimum - Bypass  
Maximum  
-
0Ω  
-
0Ω  
Table 1: Mode Selection  
Preliminary  
Date: 97.03.26  
Revision: 0.11  
Page 2 of 6  
Note: The device data in these specifications are based on engineering samples, and are preliminary. QX2011 specifications are  
subject to change without notice.  
QX2011 QXpander Processor  
Device Specifications  
QSound Labs  
1
2
3
4
VCC  
D
D
LCHOUT  
VCC  
+
2
3
5
+
-
VCC  
RCHOUT  
+
+
C
B
A
C
B
A
2
3
LIN  
5
+
-
RIN  
21  
1
13  
VIRTUAL AUDIO  
QXPANDER PROCESSOR  
LIN  
LOUT  
ROUT  
12  
RIN  
+
Volume Control  
1
2
3
4
Figure 5: QX2011 QXpander™ Typical Application  
Preliminary  
Revision: 0.11  
Date: 97.03.26  
Page 3 of 6  
Note: The device data in these specifications are based on engineering samples, and are preliminary. QX2011 specifications are  
subject to change without notice.  
QX2011 QXpander Processor  
Device Specifications  
QSound Labs  
Absolute Maximum Ratings*  
TA = +25 °C  
Parameter  
Supply Voltage  
Input Voltage  
Output Current  
Power dissipation, P22  
Power dissipation, S24  
Operating Temperature  
Storage Temperature  
Symbol  
Rating  
15  
GND ≤ VIN ≤ VCC  
10  
Unit  
V
V
mA  
mW  
mW  
°C  
VCC,max  
VIN,max  
IO,max  
Pd  
Pd  
Topr  
800  
650  
-20 ~ +75  
-40 ~ +125  
Tstg  
°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  
Unit  
Supply Current  
ICC  
16  
21  
mA  
Input Impedance  
Input Voltage, Analog,1  
Input Voltage, Analog,2  
Voltage Gain, QXpander,1  
Voltage Gain, QXpander,2  
Voltage Gain, QXpander,3  
Voltage Gain, QXpander,4  
Voltage Gain, Bypass,1  
RI  
Vin,1  
Vin,2  
Gqx,1  
Gqx,2  
Gqx,3  
Gqx,4  
Gby,1  
Gby,2  
THDqx  
21  
1.0 1.4  
0.5 0.7  
30  
39  
kΩ  
VRMS  
VRMS  
dB  
dB  
dB  
dB  
dB  
dB  
%
1
2
3
4
5
6
7
8
9
3
4
5
2
5
-1 0.5  
3
-1 0.5  
-5.6 -5.1  
-5.6 -5.1  
0.4  
4
2
-4.6  
-4.6  
1.0  
0.3  
100  
Voltage Gain, Bypass,2  
Total Harmonic Distortion, QXpander  
Total Harmonic Distortion, Bypass  
Output Noise Voltage, QXpander  
10 THDby  
0.03  
60  
%
11  
Vno,qx  
µVRMS  
Preliminary  
Revision: 0.11  
Date: 97.03.26  
Page 4 of 6  
Note: The device data in these specifications are based on engineering samples, and are preliminary. QX2011 specifications are  
subject to change without notice.  
QX2011 QXpander Processor  
Device Specifications  
QSound Labs  
Output Noise Voltage, Bypass  
12  
Vno,by  
15  
32  
µVRMS  
dB  
dB  
dB  
V
Signal-Noise Ratio, QXpander  
Signal-Noise Ratio, Bypass  
Channel Balance  
BYP Terminal Voltage, H  
BYP Terminal Voltage, L  
BYP Terminal Current, H  
SNR  
SNR  
CB  
Vby,h  
Vby,l  
Iby,h  
TBD TBD  
TBD TBD  
13  
14  
15  
16  
-1.0  
2.1  
0
+1.0  
0.7  
350  
V
µA  
BYP Terminal Current, L  
17  
Iby,l  
-10  
µA  
dB  
dB  
Insertion Loss  
Power Supply Rejection Ratio  
Output Voltage, Analog  
TBD  
TBD  
PSRR TBD TBD  
VOUT  
IOUT  
RL  
TBD TBD  
VRMS  
Output Current, Analog  
Load Resistance  
mA  
kΩ  
pF  
TBD  
Load Capacitance  
Usable Bandwidth  
CL  
TBD  
BW  
20  
20000  
Hz  
Test Conditions:  
1.  
2.  
3.  
4.  
5.  
6.  
7.  
8.  
9.  
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)  
b)  
LIN = 1 VRMS , RIN = 0 V.  
LIN = 0 V, RIN = 1 VRMS  
.
10.  
11.  
12.  
13.  
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).  
14.  
15.  
16.  
17.  
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  
Preliminary  
Revision: 0.11  
Date: 97.03.26  
Page 5 of 6  
Note: The device data in these specifications are based on engineering samples, and are preliminary. QX2011 specifications are  
subject to change without notice.  
QX2011 QXpander Processor  
Device Specifications  
QSound Labs  
Package Data  
Ordering Code  
QX2011-P22C  
QX2011-S24C  
Package Code Package Type  
P22  
S24  
PLASTIC SDIP  
PLASTIC SSOP  
PLASTIC SDIP  
22 LEAD  
P22  
6.5 ± 0.2  
300 MIL  
0.070 PITCH  
1.778  
UNITS: mm  
3.0  
19.2 ± 0.5  
8.0  
3.5 ± 0.3  
6.8 ± 0.5  
+0.1  
−0.05  
0.25  
0 ~15°  
+0.3  
−0.1  
+0.3  
−0.1  
1.05  
0.735  
1.21  
0.42 ± 0.1  
10.2 ± 0.3  
PLASTIC SSOP  
24 LEAD  
S24  
24  
13  
300 MIL  
0.030 PITCH  
UNITS: mm  
5.4 ± 0.2 7.8 ± 0.3  
1
12  
1.0  
1.8  
0 ~10°  
+0.1  
−0.15  
0.15  
1.85 ± 0.15  
0.5± 0.2  
0.8  
0.36 ± 0.1  
0.05 ± 0.05  
Preliminary  
Revision: 0.11  
Date: 97.03.26  
Page 6 of 6  
Note: The device data in these specifications are based on engineering samples, and are preliminary. QX2011 specifications are  
subject to change without notice.  
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