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QS7779PM/CM
NIPPON PRECISION CIRCUITS INC.
3D Stereo Enhancement and 3D Virtual Stereo Surround with Dolby Pro Logic and Mixed DVD (AC-3) Decoder
OVERVIEW
The QS7779PM/CM is an audio processor IC which implements a decoder for stereo matrix encoded source materials such as the Dolby Surround Pro Logic and mixed DVD (AC-3) with surround virtualization using QSoundTM technology developed and licensed by QSound Labs, Inc. This chip produces enhanced stereo sound for a stereo input signal and if the input signal contains matrix encoded surround sound, the chip decodes it and produces 3D virtualized surround sounds with two speakers.
FEATURES
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Capable of decoding Dolby Surround materials such as Dolby Pro Logic or other matrix surround encoded materials (DVD/AC-3) Virtualized surround sound with two speakers 3D stereo sound enhancement Two enhanced levels Parallel and serial digital interface for mode control
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* QS7779CM for I2C 2 control pins serial interface (Data, Clock) * QS7779PM for three-wire serial interface (Data, Clock and Strobe) Supply voltage (analog): 5 to 13V Supply voltage (digital): 4.5 to 5.5V 24-pin SSOP packaging
APPLICATIONS
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DVD, Laser disk player Audio systems including TV, Radio and VCR
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Computer-based multimedia products, including sound cards and powered loudspeakers
PINOUT(Top view)
QS7779PM QS7779CM
QXAC3 QXAC2 QXAC1
1
24
QXAC4 VCC QXBC1
QXAC3 QXAC2 QXAC1 RIN LIN COUT CIN VREFIN VREFOUT VREF GND SPRD(SCL)
1
24
QXAC4 VCC QXBC1 QXBC2 QXBC3 QXBC4 ROUT LOUT MUTE VDD P/S
QS7779PM
12 13
RIN LIN COUT CIN VREFIN VREFOUT VREF GND SPRD(SCL)
QXBC2 QXBC3 QXBC4 ROUT LOUT MUTE(STRB) VDD P/S BYP(SDA)
QS7779CM
12 13
BYP(SDA)
Using these products does not require any Dolby certifications.
ORDERING INFORMATION
D e vice QS7779PM QS7779CM P ackag e 24-pin SSOP 24-pin SSOP
I2 C bus is a registered tra d e m a r k of Philips Electronics N.V. Dolby and the double-D symbol are registered tra d e m a r ks of Dolby Laboratories Licensing Corporation. NIPPON PRECISION CIRCUITS--1
QS7779PM/CM
PACKAGE DIMENSIONS
(Unit: mm)
5.40 0.20 7.80 0.30
10.05 0.20 10.20 0.30
0.15 - 0.0
+ 0.10 5
0.10 0.10
+0.20 1.90 -0.10
0.8
0.36 0.10 0.10
1.80
0.12 M
0.50 0.20
0 10
BLOCK DIAGRAM
QXAC1 QXAC2 QXAC3 QXAC4 QXBC1 QXBC2 QXBC3 QXBC4 3 2 1 24 22 21 20 19
RIN LIN
4 5
QXpander
18
ROUT
VCC VREFIN GND
23 8
Q1 Virtualization
17 7 6
Surround Decoder
LOUT CIN COUT
11 Multiplex/Level Shift 14 Serial I/O 15 9 10 12 13 16 VDD P/S
VREFOUT VREF
SPRD BYP MUTE (SCL) (SDA) (STRB)
NIPPON PRECISION CIRCUITS--2
QS7779PM/CM
PIN DESCRIPTION
Name Number P arallel 1 2 3 4 5 6 7 8 9 10 11 SPRD 12 - BYP 13 - 14 15 MUTE 16 - 17 18 19 20 21 22 23 24 LOUT ROUT QXBC4 QXBC3 QXBC2 QXBC1 VCC QXAC4 STRB I O O I I I I - I P/S VDD - QXAC3 QXAC2 QXAC1 RIN LIN COUT CIN VREFIN VREFOUT VREF GND - SCL1 - SDA2 Serial I I I I I O I O O I - I I I I/O I - I Capacitor 3 fo r Q E X PA N D E R fi lter A Capacitor 2 fo r Q E X PA N D E R fi lter A Capacitor 1 fo r Q E X PA N D E R fi lter A Right channel signal input Left channel signal input Decoded center signal output Center signal input for summing with the right and the left signal outputs Internally generated reference voltage (V C C /2) Buffered reference voltage (V C C /2) Signal reference input Ground 0V Enhancement control (H: spread maximum, L: spread minimu m ) Serial data shift clock Bypass control (H: Bypass on, L: Qsurround on) Serial data input. ACK data output for I 2 C (Q S 7 7 7 9 C M ) Interface mode control (H: parallel I/O, L: serial I/O) Digital pow er supply DC4.5 to 5.5V Output mute control (H: mute on, L: mute off) Serial data strobe (not applicable to I2 C of Q S 7 7 7 9 C M ) Left signal output Right signal output Capacitor 4 fo r Q E X PA N D E R fi lter B Capacitor 3 fo r Q E X PA N D E R fi lter B Capacitor 2 fo r Q E X PA N D E R fi lter B Capacitor 1 fo r Q E X PA N D E R fi lter B Analog pow er supply DC5 to 13V Capacitor 4 fo r Q E X PA N D E R fi lter A I/O Description
1. Q S 7 7 7 9 C M :CMOS input. No protective diode between the terminal and V D D. Q S 7 7 7 9 P M :CMOS input. Protective diode is in between the terminal and V D D. 2. Q S 7 7 7 9 C M :Nch open drain terminal. No protective diode between terminal and V D D. Q S 7 7 7 9 P M :CMOS input. Protective diode is in between the terminal and V D D.
NIPPON PRECISION CIRCUITS--3
QS7779PM/CM
SPECIFICATIONS
Absolute Maximum Ratings
GND = 0V
P arameter Supply voltage (analog) Supply voltage (digital) Input voltage (analog) Input voltage (digital) I2 C input voltage (SDA, SCL) Pow er dissipation Storage temperature Soldering temperature Soldering time Symbol VCC VDD V IANA V IDIG V IOPEN PD T stg TSLD tS L D Rating - 0.3 to 15 - 0.3 to 7 - 0.3 to V C C + 0.3 - 0.3 to V D D + 0.3 10 250 - 40 to 125 255 10 Unit V V V V V mW C C sec
Recommended Operating Conditions
GND = 0V
P arameter Supply voltage (analog) Supply voltage (digital) Operating temperature Symbol VCC VDD TO P R Limits 5 to 13 4.5 to 5.5 - 20 to 70 Unit V V C
NIPPON PRECISION CIRCUITS--4
QS7779PM/CM
DC Electrical Characteristics
VCC = 9V, VDD = 5V, GND = 0V, Ta = 25 C unless otherwise noted.
Limits Parameter LIN, RIN analog input impedance CIN analog input impedance Reference voltage out HIGH-level input voltage L O W -level input voltage Input leakage current S D A, SCL input leakage current (I2 C input pin) S D A L OW -level output voltage Supply voltage (analog) Supply voltage (digital) Current consumption (analog) Current consumption (digital) Standby current (analog) Symbol Z AIN1 Z AIN2 VREFOUT V IH V IL IL E A K IL O P E N VOL VCC VDD IC C ID D IC C S AV E V IN = 10V A cknowledge signal out IO L = 3mA Condition min 16 4 - 0.7 x V D D - -3 -3 typ 20 5 V C C /2 - - - - max 24 6 - - 0.3 x V D D 3 3 k k V V V A A V V V mA mA mA Unit
0 5 4.5 - - -
- - - 5 0.3 0.1
0.4 13 5.5 6.5 0.5 0.2
Noise/THD Characteristics
VCC = 9V, VDD = 5V, GND = 0V, Ta = 25 C unless otherwise noted.
Limits Parameter Symbol Condition min Noise voltage Noise voltage THD N BYP NQS THDQS BYP = HIGH (Bypass mode), A-wgt, L O U T, RO U T B Y P = L OW (Qsurround mode), SPRD = HIGH, A-wgt, LOUT, RO U T LIN = RIN = 1V R M S , BYP = LOW (Qsurround mode), SPRD = HIGH, f = 1kHz - - - typ 10 20 - max 20 40 0.1 V R M S V R M S % Unit
NIPPON PRECISION CIRCUITS--5
QS7779PM/CM
AC Electrical Characteristics
VCC = 9V, VDD = 5V, GND = 0V, Ta = 25 C unless otherwise noted.
Limits Parameter Symbol Condition min M a x i m um input voltage 1 M a x i m um input voltage 2 Bypass gain Forward gain Crosstalk gain SCL clock pulse cycle SCL HIGH-level clock pulse width S C L L OW -level clock pulse width S D A set-up time S D A hold time STRB set-up time STRB clock pulse width STRB hold time SCL hold time (I 2 C) SCL set-up time (I 2 C) S D A hold time (I 2 C) S D A set-up time (I 2 C) SCL HIGH-level clock pulse width (I2 C) S C L L OW -level clock pulse width (I2 C) SCL rise time (I 2 C) SCL fall time (I 2 C) V FIN1 V FIN2 G BYP GF G XF t0 t1 t2 t3 t4 t5 t6 t7 tH D : S TA tS U : S TO tH D : DAT tS U : DAT tH I G H tL O W tr tf LIN = RIN, BYP = LOW , SPRD = HIGH, f = 1kHz LIN = - RIN, BYP = LOW , SPRD = HIGH, f = 1kHz BYP = HIGH, f = 1kHz, LIN to LOUT, RIN to RO U T SPRD = HIGH, BYP = LOW , f = 1kHz, LIN to LOUT, RIN to RO U T SPRD = HIGH, BYP = LOW , f = 1kHz, LIN to RO U T, RIN to LOUT P M version P M version P M version P M version P M version P M version P M version P M version C M version C M version C M version C M version C M version 1.4 0.5 -2 6.6 0.5 100 40 40 15 30 50 100 50 4.0 4.0 5.0 250 4.0 typ - - 0 8.6 2.5 - - - - - - - - - - - - - max - - 2 10.6 4.5 - - - - - - - - - - - - - VRMS VRMS dB dB dB ns ns ns ns ns ns ns ns s s s ns s s ns ns Unit
C M version C M version C M version
4.7 - -
- - -
- 1000 300
NIPPON PRECISION CIRCUITS--6
QS7779PM/CM
Serial Interface
Three-wire serial interface (for QS7779PM)
SDA
BYP
SPRD
MUTE
PSAVE
t3
SCL
t4
t1
STRB
t2 t0
t5 t6
t7
I2C serial interface (for QS7779CM)
I C address is {AD6 - AD0} = {1011011}
2
SDA
AD6
AD0
BYP
SPRD
MUTE PSAVE
tHD:STA
SCL
tSU:DAT
tHD:DAT
tr
tf
tSU:STO
tHIGH
tLOW
NIPPON PRECISION CIRCUITS--7
QS7779PM/CM
FUNCTIONAL DESCRIPTION
Operating Mode
This chip can be set to a desired operating mode by control pins for the parallel interface (P/S pin sets to HIGH) or control bits for the serial interface (P/S pin
Control Pins/Bits Mode No. BYP 1 0 0 x x SPRD x 0 1 x x MUTE 0 0 0 1 1 P S AV E 0 0 0 0 1 Operation (Output signal) Description LOUT LIN QX(LIN) QX+(LIN) - - ROUT RIN QX(RIN) QX+(RIN) - - Bypass mode Stereo enhanced and vir tual surround mode with low er enhanced level Stereo enhanced and vir tual surround mode with higher enhanced level Mute mode Pow er save mode. This function is available with serial interface only
sets to LOW). The control pins or bits configurations are shown in the following table.
1 2 3 4 5
Note1. x : Don't care. Note2. MUTE = 1 when PSAVE = 1
Mode description
Mode No. 1 Bypass mode. Outputs the stereo signal as it is input. Stereo Enhanced and vir tual surround mode with low er enhanced level. The Dolby Surround Pro Logic signal (Lt, Rt) input. Available Surround Effect with two speakers by Qsurround technology. Virtual location of each signal is; The Front signal: Virtually outside of the speakers. The Rear signal: Virtually behind the listeners. Stereo Enhanced and vir tual surround mode with higher enhanced level. The Dolby Surround Pro Logic signal (Lt, Rt) input. Available Surround Effect with two speakers by Qsurround technology. This mode outputs the signals much more spread sound than Mode 2. Mute mode. No signal at output pins. Pow er save mode. This function is available with serial interface only. Operating description
2
3 4 5
Center signal output
CIN and COUT are used to emphasize the center signal.
Pin CIN COUT Outputs the doubled signal to ROUT and LOUT always. Outputs the half level of signal ((RIN+LIN)/2). Description
How to use CIN and COUT.
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Connect CIN and COUT with a resistor to make the center signal emphasized. Input resistance for CIN is 5k. For example, connecting a 5k resistor between CIN and COUT makes output of (RIN+LIN)/2 to ROUT and LOUT. Directly connecting CIN and COUT makes ROUT and LOUT output (RIN+LIN).
NIPPON PRECISION CIRCUITS--8
QS7779PM/CM
TYPICAL APPLICATION CIRCUIT
QS7779PM/CM with parallel interface
3300pF
1 QXAC3 QXAC4 24
5 to 13V
2 QXAC2
VCC 23 0.01F
Signal In
3300pF 4.7F 4.7F 3.9k
3 QXAC1 QXBC1 22 4 RIN 5 LIN 6 COUT 7 CIN 8 VREFIN 9
QXBC2 21 QXBC3 20 QXBC4 19 ROUT 18 LOUT 17 4.7F 4.7F Signal Out 0.01F
VREFOUT MUTE 16 (STRB) 10 VREF VDD 15
11 GND
P/S 14 BYP 13 (SDA) 47k 5V
10F
10F
12 SPRD
(SCL)
NIPPON PRECISION CIRCUITS--9
QS7779PM/CM
QS7779PM with serial interface
3300pF
1 QXAC3 QXAC4 24
5 to 13V
2 QXAC2
VCC 23 0.01F
Signal In
3300pF 4.7F 4.7F 3.9k
3 QXAC1 QXBC1 22 4 RIN 5 LIN 6 COUT 7 CIN 8 VREFIN 9
QXBC2 21 QXBC3 20 QXBC4 19 ROUT 18 LOUT 17 4.7F 4.7F Signal Out 0.01F
VREFOUT MUTE 16 (STRB) 10 VREF VDD 15
11 GND
5V STRB
P/S 14 BYP 13 (SDA) SDA
10F
10F
12 SPRD
(SCL)
SCL
QS7779CM with serial interface
3300pF
1 QXAC3 QXAC4 24
5 to 13V
2 QXAC2
VCC 23 0.01F
Signal In
3300pF 4.7F 4.7F 3.9k
3 QXAC1 QXBC1 22 4 RIN 5 LIN 6 COUT 7 CIN 8 VREFIN 9
QXBC2 21 QXBC3 20 QXBC4 19 ROUT 18 LOUT 17 4.7F 4.7F Signal Out 0.01F
VREFOUT MUTE 16 5V VDD 15 P/S 14 BYP 13 (SDA) SDA
10 VREF 11 GND
10F
10F
12 SPRD
(SCL)
SCL
NIPPON PRECISION CIRCUITS--10
QS7779PM/CM
NIPPON PRECISION CIRCUITS INC. reserves the right to make changes to the products described in this data sheet in order to improve the design or performance and to supply the best possible products. Nippon Precision Circuits Inc. assumes no responsibility fo r the use of any circuits shown in this data sheet, conveys no license under any patent or other rights, and makes no claim that the circuits are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Nippon Precision Circuits Inc. makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification. The products described in this data sheet are not intended to use for the apparatus which influence human lives due to the failure or malfunction of the products. Customers are requested to comply with applicable laws and regulations in effect now and hereinafter, including compliance with expor t controls on the distribution or dissemination of the products. Customers shall not expor t, directly or indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies. NIPPON PRECISION CIRCUITS INC. 4-3, Fukuzumi 2-chome Koto-ku, Tokyo 135-8430, Japan Telephone: 03-3642-6661 Facsimile: 03-3642-6698 NC9817AE 1999.6
NIPPON PRECISION CIRCUITS INC.
NIPPON PRECISION CIRCUITS--11

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