NJM2703 3D SURROUND AUDIO PROCESSOR FOR HEADPHONE 3D FILTER
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- Myrtle Patterson
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1 NJM273 3D SUOUND AUDIO POCESSO FO HEADPHONE GENEA DESCIPTION The NJM273 is a high quality 3D surround audio processor designed for headphone applications. It includes mode control switch (Surround mode / Bypass mode). The NJM273 features low operating voltage, low operating current, low output noise and very small package, and is suitable for any portable audio applications. PACKAGE OUTINE NJM273B2 (MSOP (TVSP) ) FEATUES Operating Voltage ow Operating Current ow Output Noise Variable Surround Effect by external resistor Internal Mode Control Switch Bipolar Technology Package Outline.8 to 6V.4mA typ. (at Surround mode, V: max.) µv typ. (at Surround mode, V: max.) MSOP (TVSP)* *MEET JEDEC MO-87-DA / THIN TYPE PIN CONFIGUATION IN 2. IN 3. SW 4. VEF. GND 6. V+ 7. NF 8. NF 9. OUT. OUT BOCK DIAGAM IN + + OUT 3D FITE IN - + OUT Bypass Surround Mode --
2 NJM273 ABSOUTE MAXIMUM ATING (Ta=2 C) PAAMETE SYMBO ATINGS UNIT Supply Voltage V + 7 V Power Dissipation P D 32 mw Operating Temperature ange T opr -2 to +7 C Storage Temperature ange T stg -4 to +2 C OPEATING VOTAGE PAAMETE SYMBO TEST CONDITION MIN. TYP. MAX. UNIT Operating Voltage V V EECTICA CHAACTEISTICS (V+=3V, Ta=2 C unless otherwise specified) PAAMETE Operating Current eference Voltage SYMBO I CC Vref No Signal INPUT TEST CONDITION OUTPUT MODE V MIN. TYP. MAX. UNIT - Bypass Surround MAX No Signal V AC CHAACTEISTICS (V+=3V, Ta=2 C, =-2dBV(mVrms), f=khz, =kω, unless otherwise specified) PAAMETE Maximum Input Voltage SYMBO V IM f=khz T.H.D.=% INPUT TEST CONDITION OUTPUT MODE V Bypass - - ma MIN. TYP. MAX. UNIT -2. (79) - Output Noise V NO f=hz T.H.D.=% V+=.8V f=khz T.H.D.=% V+=.8V f=hz T.H.D.=% g=ω A-Weighted g=ω A-Weighted Surround MAX - Bypass - Surround MAX -. (3) -24. (6) Bypass - - Surround MAX (6) -8. (38) -22. (7) -2 (2.) - () (.) -94 (2) dbv (mvrms) dbv (µvrms) Total Harmonic Distortion T.H.D f=khz f=khz Bypass Surround MAX -.. % - 2 -
3 NJM273 AC CHAACTEISTICS (V+=3V, Ta=2 C, =-2dBV(mVrms), f=khz, =kω, unless otherwise specified) PAAMETE Bypass Gain SYMBO G VBYP f=khz INPUT TEST CONDITION OUTPUT MODE V MIN. TYP. MAX. UNIT Bypass db Surround Gain G VSU f=hz Surround MAX f=hz Surround MAX db f=hz Surround MIN CONTO CHAACTEISTICS (V+=3V, Ta=2 C unless otherwise specified) PAAMETE Mode Select Control Voltage MODE SWITCH SYMBO V MODE = High evel = ow evel INPUT MODE SW NOTES TEST CONDITION Bypass, open Input Through Surround H Surround Mode (Stereo Input) OUTPUT MODE V MIN. TYP. MAX. UNIT V V -3-
4 NJM273 TEMINA DESCIPTION PIN NO. SYMBO FUNCTION EQUIVAENT CICUIT VOTAGE V+ V+ V+ 2 IN IN ch Input ch Input 7.V k VEF V+ V+ V+ 3 SW Mode control switch V 7 3k V+ V+ V+ 4 VEF eference voltage.v 3k 3k GND GND V - 4 -
5 NJM273 PIN NO. SYMBO FUNCTION EQUIVAENT CICUIT VOTAGE V+ Power Supply V+ V+ V+ 2k 7 8 NF NF Filter terminal Filter terminal 4.V V+ V+ V+ V+ 9 OUT OUT ch Output ch Output 2k 2k.V -
6 NJM273 APPICATION CICUIT ch IN µ IN OUT µ ch OUT ch IN SW µ k µ µ IN SW VEF OUT NF NF µ ch OUT µ.33µ 4.7k MAX MIN V kb GND V+ 6 µ V+(3V) - 6 -
7 NJM273 TYPICA CHAACTEISTICS Supply Current vs. Supply Voltage Ta=2degrees Supply Current vs. Ambient Temperature V+=3V Supply Current [ma] Surround BYPASS Supply Current [ma] BYPASS Surround Supply Voltage [V] eference Voltage vs. Supply Voltage Ta=2degrees eference Voltage vs. Ambient Temperature V+=3V eference Voltage [V] eference Voltage [V] Supply Voltage [V] Maximum Input Voltage vs. Supply Voltage (BYPASS) Vin=ch f=khz Vout=ch =kohm THD=% Ta=2degrees Maximum Input Voltage vs. Supply Voltage (Surround) Vin=ch f=hz Vout=ch =kohm V=MAX THD=% Ta=2degrees Supply Voltage [V] Supply Voltage [V] -7-
8 NJM273 TYPICA CHAACTEISTICS Maximum Input Voltage vs. Ambient Temperature (BYPASS) V+=3V Vin=ch f=khz Vout=ch =kohm THD=% Maximum Input Voltage vs. Ambient Temperature (Surround) - V+=3V Vin=ch f=hz Vout=ch =kohm V=MAX THD=% Maximum Input Voltage vs. Ambient Temperature (BYPASS) V+=.8V Vin=ch f=khz Vout=ch =kohm THD=% Maximum Input Voltage vs. Ambient Temperature (Surround) -2 V+=.8V Vin=ch f=hz Vout=ch =kohm V=MAX THD=% Output Noise Voltage vs. Ambient Temperature V+=3V g=ohm Vout=ch V=MAX FITE=A-Weighted -9 Output Noise Voltage vs. Ambient Temperature V+=3V g=ohm Vout=ch V=MAX FITE=A-Weighted -9-9 Output Noise Voltage [dbv] Surround BYPASS Output Noise Voltage [dbv] Surround BYPASS
9 NJM273 TYPICA CHAACTEISTICS Total Harmonic Distortion vs. Input Voltage (BYPASS) V+=3V Vin=ch f=khz Vout=ch =kohm BW=Hz to 8kHz Total Harmonic Distortion vs. Input Voltage (Surround) V+=3V Vin=ch f=hz Vout=ch =kohm BW=Hz to 8kHz V=MAX THD+N [%]. Ta=7deg. Ta=2deg. Ta=-2deg. THD+N [%]. Ta=7deg. Ta=2deg. Ta=-2deg Input Voltage [dbv] Input Voltage [dbv] Voltage Gain [db]. Voltage Gain vs. Frequency (BYPASS) V+=3V Vin=-2dBV ch Vout=ch =kohm g=2ohm Ta=-2deg. Ta=2deg. Ta=7deg. Voltage Gain [db] 2 Voltage Gain vs. Frequency (Surround) V+=3V Vin=-2dBV ch Vout=ch =kohm g=2ohm V=MAX Ta=7deg. Ta=2deg. Ta=-2deg Frequency [Hz] 4 Frequency [Hz] Voltage Gain vs. Frequency (Surround) V+=3V Vin=-2dBV ch Vout=ch =kohm g=2ohm V=MAX 2 Voltage Gain vs. Frequency (Surround) V+=3V Vin=-2dBV ch Vout=ch =kohm g=2ohm V=MIN Ta=7deg. Ta=2deg. Ta=-2deg. Voltage Gain [db] Voltage Gain [db] Ta=7deg. Ta=2deg. Ta=-2deg. - 4 Frequency [Hz] 4 Frequency [Hz] -9-
10 NJM273 TYPICA CHAACTEISTICS 2 Voltage Gain vs. SW Terminal Input Voltage V+=3V Vin=-2dBV ch f=hz Vout=ch V=MAX BYPASS to Surround Output DC Offset Voltage vs. Ambient Temperature V+=3V BYPASS to Surround Voltage Gain [db] Ta=7deg. Ta=2deg. Ta=-2deg. Output DC Offset Voltage [mv] ch ch.. 2 SW Terminal Input Voltage [V] [CAUTION] The specifications on this databook are only given for information, without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. - -
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