CXA1917AM

CXA1917AM/AS Dolby∗ S type Noise Reduction Processor Description The CXA1917AM/AS is a bipolar IC designed for use in the Dolby S type noise reduction system (NR). An external operational amplifier is required to configure the decoder. The stereo Dolby B-C-S type NR combines use of a CXA1563M/S and two CXA1917AM/AS ICs. 30 pin SOP (Plastic) 30 pin SDIP (Plastic) Features • Considerable reduction in the number of external parts (half compared to CXA1417S/Q) • The same Dolby level as that of CXA1560 series ICs (–6dBm) Structure Bipolar silicon monolithic IC Absolute Maximum Ratings (Ta = 25°C) • Supply voltage VCC to VEE 17 • Operating temperature Topr –20 to +75 • Storage temperature Tstg –65 to +150 • Allowable power dissipation PD (CXA1917AM) 600 (CXA1917AS) 1200 Recommended Operating Conditions Supply voltage VCC VEE V °C °C mW mW 4.5 to 6.5 –4.5 to –6.5 V V ∗ This IC is available only to the licensees of Dolby Laboratories Licensing Corporation from whom licensing and applications information may be obtained. ∗ "Dolby" and the double D symbols are trademarks of Dolby Laboratories Licensing Corporation. Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. –1– E95Y15B74 Block Diagram and Pin Configuration (Encoder Unit) C25 39n VCT R30 8.2k 2% C30 2.2n R31 13k 2% R34 1.5k 21 20 TCS1L TCS2L TCF2L TCF1L IREF 19 18 17 16 VCC C34 8.2n C40 47n C44 0.1µ 23 22 SCBOL FBOL C42 0.22µ 10% R45 47 C45 0.47µ 10% R47 33 R28 24k 2% C38 1µ 27 25 24 RECOUT SCINL HLSOUT ANTSAT SLDET 20k FLDET FLICG FLVCR SLVCR VCC 1 GND 2 VREF & IREF SHDET LFDET FHVCR SHVCR SHICG VEE 3 VCT 4 LFVCR LFICG V to I Conv H FHDET FHICG SLICG ZHSL 26 C29 470p R27 10k 2% RECOUT 5 VCT R9 39k 28 MCBO R12 C8 10k 22n C14 100n 30 29 MC4IN MC3IN 20k 15k 17.5k V to I Conv H GND MC4 6 MC3 R25 33 R14 16k 2% C24 39n C17 100n R16 39k 2% C20 22n C23 0.22µ R24 10k 2% C26 1µ 10% –2– ZHSH 3 R19 39k 2% 4 7 5 6 R26 18k 2% 8 ZL2 LFIN TCL1 TCL2 SCINH 9 FBOH 10 TCF1H 11 C7 100n VCT C27 680p VCT C31 8.2n C41 0.1µ MC1 MC4 MC3DS MC3DT MC MC2 MC1 HLSMP MCTC TCF2H 12 R46 33 C43 0.47µ 10% TCS2H 13 R48 47 C46 0.22µ 10% TCS1H 14 VCT 15 VEE R10 27k 2% R20 5.1k 2% 1 2 C19 1.8n C21 1.8n C16 0.22µ C48 0.1µ 10% VCT INPUT CXA1917AM/AS 7 C11 100n R15 VCT 2.4k 2% VCT Note) Split Supply: Short VCT to GND Single Supply: Short GND to VEE and open VCT Tolerances of resistors are 5% without otherwise specified Tolerances of film capacitors are 5% without otherwise specified Tolerances of chemical capacitors are 20% without otherwise specified CXA1917AM/AS Pin Description Pin No. Symbol DCV (V) (DCV values are for Vcc = 6.0V and VEE = –6.0V.) Equivalent Circuit VCC Description 1 HLSMP 0 1 HLS main path input VEE VCC 1.5k 2 2 MCTC –3.9 9.2k Time constant for the MC2 2p VEE VCC 2.6k 3 3 ZHSH 0 DC cut capacitance for the HLS/HF/SB detector VEE VCC VCT 16k 4 ZL2 0 4 HF/LF/FB pass band rectifier input GND –3– CXA1917AM/AS Pin No. Symbol DCV (V) Equivalent Circuit VCC Description 5 10.2k 5 LFIN 0 HLS/LF/FB-stage input GND VCC 1.5k 6 TCL1 –4.6 6 68k Primary time constant for the HLS/LF/FB detector VEE VCC 7 7 TCL2 –4.6 300k 124k Secondary time constant for the HLS/LF/FB detector VEE VCC 500 8 SCINH 0 8 500 HLS/HF side chain input VEE –4– CXA1917AM/AS Pin No. Symbol DCV (V) Equivalent Circuit VCC Description 9 FBOH 0 1.6k 9 22 5.1k VCT HLS/HF/FB VCR output 22 FBOL 0 GND VCC LLS/HF/FB VCR output 10 10 TCF1H 0 80k Primary time constant for the HLS/HF/FB detector VEE VCC 11 TCF2H –4.6 11 18 340k 22k Secondary time constant for the HLS/HF/FB detector 18 TCF2L –4.6 VEE VCC Secondary time constant for the LLS/HF/FB detector 12 TCS2H –4.6 2k 12 20 364k 46k 4k Secondary time constant for the HLS/HF/SB detector 20 TCS2L –4.6 VEE Secondary time constant for the LLS/FB/SB detector –5– CXA1917AM/AS Pin No. Symbol DCV (V) Equivalent Circuit VCC Description 13 13 TCS1H –4.6 80k 26k Primary time constant for the HLS/HF/SB detector VEE VCC 2k 500 500 14 VCT 0 14 For dual power supply: Ground For single power supply: VCT GND 15 VEE –6.0 For dual power supply: Negative power supply For single power supply: Ground Positive power supply VCC 16 VCC 6.0 1.5k 17 IREF –4.8 17 Reference current input VEE VCC 1.5k 19 TCF1L –4.6 19 80k Primary time constant for the LLS/HF/FB detector VEE –6– CXA1917AM/AS Pin No. Symbol DCV (V) Equivalent Circuit VCC Description 21 TCS1L –4.6 21 86k 70k Primary time constant for the LLS/HF/SB detector VEE VCC 23 SCBOL 0 500 24 500 1.64MEG 500p 23 LLS/HF side chain buffer amplifier output 24 SCINL 0 VEE LLS/HF side chain input VCC 25 RECOUT 0 17.5k 25 47p 20p 2k 200 500 200 500 20k 20k 28 Recording (encoding) output 28 MCBO 0 VEE MC buffer feedback VCC 3.6k 26 26 ZHSL 0 DC cut capacitance for the LLS/HF/SB detector VEE –7– CXA1917AM/AS Pin No. Symbol DCV (V) Equivalent Circuit VCC Description 20k 500 11k 26 27 HLSOUT 0 27 47p 500 HLS output VEE VCC 22k 22k 29 MC3IN 0 29 MC3 input VEE VCC 30 MC4IN 0 30 MC4 input VEE –8– CXA1917AM/AS Electrical Characteristics Characteristics Operating voltage Current consumption (Ta = 25°C, Dolby level: –6dBm (= 388mVrms) at encoder input, Vcc = +6V, V EE = –6V) Measurement conditions Symbol VOPR ICC EB-1 EB-2 EB-3 EB-4 EB-5 EB-6 EB-7 EB-8 Vomax THD SNR 2 0.05 0.3 12 0.3 2 0.05 12 1 1 0 Rg = 600Ω CCIR/ARM –60 –40 –40 –40 –20 –20 0 0 THD = 1% f (kHz) 1 Input 15dB Other THD ≤ 1% No signal Min. ±4.5 10.0 22.0 5.9 15.0 12.8 6.7 4.4 –2.9 –7.3 14.0 — 62.0 15.0 23.5 7.4 16.5 14.3 8.2 5.9 –1.4 –5.8 16.0 0.01 65.0 Typ. Max. ±6.5 20.0 25.0 8.9 18.0 15.8 9.7 7.4 0.1 –4.3 — 0.15 — Unit V mA dB dB dB dB dB dB dB dB dB % dB Encoding characteristics (boost) (1) (2) (3) (4) (5) (6) (7) (8) Signal handling Total harmonic distortion S/N ratio –9– Electrical Characteristics Measurement Circuit Signal Genarator Distortion Anaryzer C25 39n R27 10k CCIR/ARM R30 8.2k C30 2.2n Noise Meter R12 10k C14 100n C29 470p R9 39k C38 1µ R31 13k R34 1.5k 23 22 20 21 19 18 C34 8.2n C40 47n C42 0.22µ C44 0.1µ 24 27 25 26 28 C8 22n VCC (+6V) C45 0.47µ 17 R28 24k 16 A 1 30 29 ZHSL MCBO SCINL FBOL MC4IN MC3IN SCBOL TCS1L TCS2L TCF1L TCF2L IREF VCC HLSOUT RECOUT ZHSH FBOH MCTC SCINH HLSMP TCL2 TCL1 LFIN ZL2 TCF1H TCF2H TCS2H 1 3 4 7 8 2 5 6 9 10 11 12 13 TCS1H 14 VCT 15 C16 0.22µ C7 100n C23 0.22µ R23 33 C26 1µ C31 8.2n C41 0.1µ C43 0.47µ C46 0.22µ C48 0.1µ VEE (–6V) 3 R10 27k R19 39k C17 100n R16 39k C20 22n C24 39n R24 10k R14 16k R20 5.1k R26 18k C27 680p CXA1917AM/AS C11 100n R15 2.4k C19 1.8n C21 1.8n VEE – 10 – GND 2 Application Circuit LINEOUT 6 C4 4.7µ C25 39n R12 10k R30 8.2k C30 2.2n C42 0.22µ R45 47 20 19 C44 0.1µ 18 R47 33 17 C45 0.47µ C9 4.7µ R27 10k (–6dBm) RECOUT 5 (–6dBm) INPUT C8 22n C38 1µ 27 25 24 22 21 26 23 R31 13k R34 1.5k C40 47n C34 8.2n 30 29 28 C14 100n (–25dBm) R5 12k ZHSL MCBO SCINL FBOL MC4IN MC3IN SCBOL TCS1L TCS2L TCF1L TCF2L IREF VCC R4 12k DECODE C1 4.7µ C29 470p 7 R9 39k VCC (+6V) R28 24k 16 1 HLSOUT RECOUT GND 2 ZL2 ZHSH FBOH MCTC SCINH HLSMP TCL2 LFIN C3 33µ 1 2 3 7 4 8 5 6 9 TCF1H TCF2H C2 33µ TCL1 TCS2H 10 11 R46 33 C41 0.1µ C43 0.47µ 12 R48 47 C46 0.22µ 13 TCS1H 14 VCT 15 C16 0.22µ C7 100n C23 0.22µ R25 33 C26 1µ C31 8.2n C48 0.1µ VEE (–6V) 3 R10 27k C21 1.8n C17 100n R16 39k R19 39k C20 22n C24 39n R14 16k R20 5.1k C11 100n R15 2.4k C19 1.8n R24 10k R26 18k C27 680p CXA1917AM/AS Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same. VEE – 11 – R2 1.5k ENCODE R3 1.5k R1 22k CXA1917AM/AS Notes on Application The CXA1917A is an encoding IC for the Dolby S type (NR). An external operational amplifier is required to configure the decoder circuit. The Dolby level voltage of this IC is designed to be –6dBm (388mVrms), which is the same as that of the CXA1562 and CXA1563 Dolby B-C type ICs. Therefore, it is possible to use the CXA1562 or the CXA1563 to configure a B-C-S type switchable processor. The B-C-S type switchable processor can be configured without requiring an external operational amplifier because the CXA1563 has a built-in S-type changeover switch. Power Supply The CXA1917A will operate with either dual or single power supply. Connect VCT pin to GND pin when dual power supply is used. Connect VEE pin to GND pin and open VCT pin when a single power supply is used. The power supply half the Vcc generated inside the IC is generated at VCT pin. The supply voltage range is from ±4.5V to ±6.5V and from 9V to 13V for dual and single power supplies, respectively. Note, however, that the minimum supply voltage is determined by the maximum voltage amplitude of external operational amplifier. Because general-purpose operational amplifiers have the maximum voltage amplitude of approximately (Vcc – VEE) –2V, actual minimum supply voltages, which satisfy the 15dB overload margin, are ±5.0V and 10V for dual and single power supplies, respectively. The supply current does not depend so much on the supply voltage, but does depend on the signal level and frequency. The maximum supply current in the worst case is approximately 25mA. Recording Processor Fig. 1 shows the recording processor. The gain is defined as follows: GREC20 · Log (1 + R62/R63) ...... (1) The processor in Fig. 1 has a gain of 14dB, therefore, input sensitivity is –20dBm (77.5mVrms). An input sensitivity higher than –25dBm (44mVrms) is generally unacceptable due to noise performance, although this is affected by the operational amplifier in the input circuit. An important characteristic for the external operational amplifier is the noise performance for approximately an input impedance of 20kΩ. A bipolar input type will be better than the JFET input type for the recording processor. Playback Processor Fig. 2 shows the playback processor. The gain is defined as follows: GPB20 · Log (1 + R64/R65) ...... (2) The processor in Fig. 2 has a gain of 20dB, therefore, the input sensitivity is –26dBm (39mVrms). Important characteristics of the playback processor are the frequency response and the feedback loop stability, which depend on the gain of the feedback loop gain and the slew rate of the external operational amplifier. The slew rate has to be higher than 3V/µs. The loop gain can be estimated using the gain bandwidth product BG (Hz) of the operational amplifier and the decode gain APB. The lower limit of BG/APB is approximately 500kHz, and the recommended range is from 1 to 3MHz. Switchable Processor Fig. 3 shows the switchable processor. The gains are the same as in equations (1) and (2). An operational amplifier is required with low noise, average slew rate (> 3V/µs), and wide bandwidth (≈ 10MHz) for this gain setting. A bipolar input type operational amplifier with a wide bandwidth like those of the 4560 and the 4570 is required of the switchable processor. The processor in Fig. 3 may generate a significant switching noise, especially when S2 switch is make-breakmake type. When S2 switch is a make-to-make type or has a quick switching feature, the switching noise will be within the range acceptable for cassette decks with output muting circuits. – 12 – CXA1917AM/AS B-C-S Type Switchable Stereo Processor Fig. 4 shows the stereo processor switchable to any B-C-S type mode. The operational amplifier is unnecessary, because the CXA1563 is used for a B-C type processor and S-type changeover switch is built in the IC. It is recommended that the S type mode be used for recording level calibration. C61 4.7µ C62 4.7µ C63 2.2µ A1 R61 56k R63 3k VCT R62 12k Encoder Unit GND VCC 1 5 RECOUT 6 GND 7 INPUT GND 2 VEE 3 VCT 4 4 VCT 2 3 GND VEE 1 VCC RECOUT (–6dBm) 5 LINEOUT (–6dBm) 6 RECIN (–20dBm) 7 Fig. 1. Recording Processor LINEOUT (–6dBm) 6 C64 2.2µ R61 22k C62 4.7µ 1 VCC R64 18k A1 R65 2k GND VCC 1 5 RECOUT 6 GND 7 INPUT GND 2 VEE 3 VCT 4 4 VCT Encoder Unit 2 3 GND VEE PBIN (–26dBm) 8 VCT Fig. 2. Playback Processor RECOUT (–6dBm) LINEOUT (–6dBm) PBIN (–26dBm) RECIN (–20dBm) C61 10µ 5 C62 10µ 6 8 7 S1 R61 56k R65 2k R63 3k C63 2.2µ R64 18k A1 S2 GND 5 RECOUT 6 GND 7 INPUT VCC 1 GND 2 VEE 3 VCT 4 4 VCT R62 12k Encoder Unit 2 3 GND VEE 1 VCC VCT Fig. 3. Switchable Processor – 13 – CXA1917AM/AS LINE OUT1 13 REC OUT1 14 C13 1µ Encoder Unit 1 5 RECOUT GND 6 GND 7 INPUT C12 1µ 27 26 22 21 C16 1µ VCC 1 GND 2 VEE 3 VCT 4 MPX OFF PB 18 16 MPX ON 15 1 VCC GND PBIN1 12 LINEIN1 11 VCT C11 1µ 28 PBIN1 SIN1 MODE VCT LINEOUT1 RECOUT1 LINEIN1 VCC CXA1563 2 GND GND LINEOUT2 RECOUT2 LINEIN2 PBIN2 NRSW SSW SIN2 2 C21 1µ LINEIN2 21 C22 1µ 3 7 8 11 S Encoder Unit 2 VCC 1 GND 12 B/C OFF 13 C 14 B GND 3 VEE 5 RECOUT GND 2 PBIN2 22 GND 6 GND 7 INPUT C23 1µ VEE 3 VCT 4 4 C26 1µ VCT 23 LINEOUT2 24 RECOUT2 Fig. 4. B-C-S Switchable Stereo Processor – 14 – CXA1917AM/AS Example of Representative Characteristics Current consumption vs. Supply voltage 18 No signal 18 Current consumption vs. Input level VCC = +6V VEE = –6V 0dB = –6dBm 10kHz 16 1kHz 100Hz 14 ICC – Current consumption [mA] 16 14 12 ICC – Current consumption [mA] 8 10 12 14 16 12 –10 0 Encoding input level [dB] 10 VCC – VEE – Supply voltage [mA] Encoding characteristics 25 20 VCC = +6V VEE = –6V 0dB = –6dBm –60dB –50dB –40dB –30dB 10 –20dB 5 –10dB 0 –5 –10 0dB +10dB Total harmonic distortion characteristics VCC = +6V VEE = –6V 0dB = –6dBm 15 Total harmonic distortion [%] 1.0 Encoding boost [dB] 100Hz 0.1 1kHz 10kHz 30 100 300 1k 3k 10k 30k 0.01 –10 –5 0 5 10 15 20 Frequency [Hz] Output level [dB] Overload margin vs. Supply voltage –10 VCC = +6V VEE = –6V 0dB = –6dBm f = 1kHz Ripple rejection VCC – VEE = 12V Vripple = –20dBm Encode Mode VCC (Dual Supply) VCC (Single Supply) C = 47µ (14pin) 20 Overload margin [dB] Ripple rejection [dB] Overload margin: Encoding input level when 1% of total harmonic distortion is generated at the encoding output 8 10 12 14 16 –20 15 –30 10 VEE (Dual Supply) –40 30 100 300 1k 3k 10k 30k VCC – VEE – Supply voltage [V] Frequency [Hz] – 15 – CXA1917AM/AS Package Outline CXA1917AM Unit: mm 30PIN SOP(PLASTIC) + 0.4 2.3 – 0.15 0.1 16 + 0.4 18.8 – 0.1 30 10.3 ± 0.4 + 0.3 7.6 – 0.1 + 0.2 0.1 – 0.05 (9.3) 15 1 0.45 ± 0.1 1.27 0.2 M + 0.1 0.2 – 0.05 0° to 10° DETAIL A PACKAGE STRUCTURE PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE SOP-30P-L03 SOP030-P-0375 LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT EPOXY RESIN SOLDER PLATING 42/COPPER ALLOY 0.7g CXA1917AS 30PIN SDIP (PLASTIC) + 0.1 05 0.25 – 0. + 0.4 26.9 – 0.1 30 16 + 0.3 8.5 – 0.1 10.16 0.5 ± 0.2 0° to 15° A 1 1.778 15 0.5 ± 0.1 0.9 ± 0.15 PACKAGE STRUCTURE MOLDING COMPOUND SONY CODE EIAJ CODE JEDEC CODE SDIP-30P-01 SDIP030-P-0400 LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT EPOXY / PHENOL RESIN SOLDER/PALLADIUM PLATING COPPER ALLOY 1.8g – 16 – 3.0 MIN 0.5 MIN + 0.4 3.7 – 0.1