CXA1646Q

CXA1646Q/CXA1767Q Electronic Volume Description The CXA1646Q/CXA1767Q is a serial control electronic volume IC for car stereos. Features • Loudness • Volume control (1dB-step from 0dB to –87dB, –∞dB) • Balance • Tone control (2dB-step 2 band from –14dB to +14dB) • Fader (2dB-step to –20dB, –25dB, –35dB, –45dB, –60dB, –∞dB) • Input selector (4 channels) • Serial data control (DATA, CLK, CE) • Single 8V power supply • Zero-cross detection circuit Structure Bipolar IC Absolute Maximum Ratings (Ta = 25°C) • Supply voltage VCC 13 • Operating temperature Topr –40 to +85 • Storage temperature Tstg –65 to +150 • Allowable power dissipation PD 350 240 Recommended Operating Condition Supply voltage VCC CXA1646Q 48 pin QFP (Plastic) CXA1767Q 40 pin QFP (Plastic) V °C °C mW (Ta = 85°C, 1646Q) mW (Ta = 85°C, 1767Q) 6 to 12 V 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– E92759D7Y CXA1646Q/CXA1767Q Block Diagram and Pin Configuration CXA1646Q TCLC11 TCLC12 LDHC1 TCHC1 LDLC1 INAO1 FDIN1 FNTO1 VRIN1 TCO1 NC 36 35 34 33 32 31 30 29 28 27 26 25 GAIN1 37 LOUD IN14 38 8dB STEP VOLUME 1dB STEP VOLUME FADER NC 24 REO1 TONE 23 CE IN13 39 22 TEST INPUT SW VCTBUFF VCTBUFF 21 CLK IN12 40 IN11 41 LATCH NC 42 ZCDET NC 43 SHIFT REGISTER IN21 44 LATCH CONTROL 20 GND 19 NC 18 NC 17 VCC INPUT SW IN22 45 VCTBUFF VCTBUFF 16 VCT IN23 46 15 DATA IN24 47 LOUD GAIN2 48 VOLUME 8dB STEP VOLUME 1dB STEP TONE FADER 14 INIT 13 REO2 1 2 3 4 5 6 7 8 9 10 11 12 TCHC2 TCLC22 FNTO2 LDLC2 INAO2 FDIN2 NC LDHC2 VRIN2 TCLC21 –2– TCO2 NC CXA1646Q/CXA1767Q CXA1767Q TCLC11 TCHC1 TCLC12 LDHC1 LDLC1 INAO1 VRIN1 30 29 28 27 26 25 24 23 FDIN1 TCO1 22 21 GAIN1 31 LOUD IN14 32 8dB STEP VOLUME 1dB STEP VOLUME FADER FNTO1 20 REO1 TONE 19 CE IN13 33 INPUT SW 18 TEST VCTBUFF VCTBUFF IN12 34 17 CLK LATCH IN11 35 ZCDET IN21 36 SHIFT REGISTER LATCH CONTROL 16 GND 15 VCC IN22 37 14 VCT INPUT SW VCTBUFF VCTBUFF 13 DATA IN23 38 IN24 39 LOUD GAIN2 40 VOLUME 8dB STEP VOLUME 1dB STEP 12 INIT TONE FADER 11 REO2 1 2 3 4 5 6 7 8 9 10 TCLC22 TCHC2 LDHC2 –3– TCLC21 FNTO2 LDLC2 VRIN2 TCO2 INAO2 FDIN2 CXA1646Q/CXA1767Q Pin Description (Pin No. in the parenthesis is for CXA1767Q.) Pin No. Symbol I/O resistance Pin voltage Equivalent circuit Description Vcc 2 (1) 35 (30) LDLC2 LDLC1 5.28kΩ VCT Sets loudness low cut-off frequency. GND Vcc 3 (2) 34 (29) LDHC2 LDHC1 7.97kΩ VCT Sets loudness high cut-off frequency. GND Vcc 4 (3) 33 (28) INAO2 INAO1 — VCT Input selector output GND Vcc 5 (4) 32 (27) VRIN2 VRIN1 50kΩ VCT Volume input GND –4– CXA1646Q/CXA1767Q Pin No. Symbol I/O resistance Pin voltage Equivalent circuit Description Vcc 6 (5) 31 (26) TCHC2 TCHC1 5kΩ VCT Sets tone high frequency. GND Vcc 7 (6) 30 (25) TCLC21 TCLC11 8kΩ VCT Sets tone low frequency. GND Vcc 8 (7) 29 (24) TCLC22 TCLC12 8kΩ VCT Sets tone low frequency. GND Vcc 9 (8) 28 (23) TCO2 TCO1 — VCT Tone control output GND –5– CXA1646Q/CXA1767Q Pin No. Symbol I/O resistance Pin voltage Equivalent circuit Description Vcc 10 (9) 27 (22) FDIN2 FDIN1 24kΩ VCT Fader input GND Vcc 11 (10) 26 (21) FNTO2 FNTO1 — VCT Front output GND Vcc 13 (11) 24 (20) REO2 REO1 — VCT Rear output GND Vcc 14 (12) INIT — — System reset GND –6– CXA1646Q/CXA1767Q Pin No. Symbol I/O resistance Pin voltage Equivalent circuit Vcc Description 15 (13) DATA ~∞ – — Serial data input GND 16 (14) 17 (15) 20 (16) VCT VCC GND — VCT VCC GND Vcc 1 VCC 2 +power supply GND 21 (17) CLK ~∞ – — Serial clock GND 22 (18) TEST — — Vcc Test. Leave open. 23 (19) CE ~∞ – — Latch enable GND –7– CXA1646Q/CXA1767Q Pin No. Symbol I/O resistance Pin voltage Equivalent circuit Description Vcc 37 (31) 48 (40) GAIN1 GAIN2 10kΩ VCT 10kΩ 10kΩ Sets input amplifier gain to 6dB by connecting to VCT. 0dB at open. GND Vcc 38 (32) 39 (33) 40 (34) 41 (35) 44 (36) 45 (37) 46 (38) 47 (39) IN14 IN13 IN12 IN11 IN21 IN22 IN23 IN24 50kΩ VCT Signal input GND Reset Reset is performed by lowering the INIT pin below 1V when CLK is High. Reset is disabled when CLK is Low. The following table shows the reset status. Mode INPUT VRC1 VRF1 VRC2 VRF2 LOUD TONE BASS TONE TREBLE FADER Set value 1 –∞ –7dB –∞ –7dB OFF 0dB 0dB 0dB, REAR –8– CXA1646Q/CXA1767Q Data Format (a) Data allocation FAST BIT D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 D17 D18 D19 D20 D21 D22 D23 D24 D25 D26 D27 D28 D29 D30 D31 LAST BIT D32 MSB NOP ISW LOUD VRC1 VRF1 VRC2 VRF2 TONE BASS TONE TREBLE FADER FADER SELECT LSB –9– CXA1646Q/CXA1767Q (b) Set table • NOP Set value — D1 0 D2 0 • ISW Set value IN14/IN24 IN13/IN23 IN12/IN22 IN11/IN21 D1 1 1 0 0 D2 1 0 1 0 • LOUD Set value ON OFF D5 1 0 • VRC1/VRC2 Set value O –8 –16 –24 –32 –40 –48 –56 –64 –72 –80 –∞ –∞ D6/D13 1 1 1 1 1 1 1 1 0 0 0 0 0 D7/D14 1 1 1 1 0 0 0 0 1 1 1 1 0 D8/D15 1 1 0 0 1 1 0 0 1 1 0 0 0 D9/D16 1 0 1 0 1 0 1 0 1 0 1 0 0 • VRF1/VRF2 Set value O –1 –2 –3 –4 –5 –6 –7 D10/D17 1 1 1 1 0 0 0 0 D11/D18 1 1 0 0 1 1 0 0 D12/D19 1 0 1 0 1 0 1 0 – 10 – CXA1646Q/CXA1767Q • TONE BASS/TREBLE Set value 14 12 10 8 6 4 2 0 D20/D24 1 1 1 1 0 0 0 0 D21/D25 1 1 0 0 1 1 0 0 D22/D26 1 0 1 0 1 0 1 0 • BOOST/CUT Set value BOOST CUT D23/D27 1 0 • FADER Set value –∞ –60 –45 –35 –25 –20 –18 –16 –14 –12 –10 –8 –6 –4 –2 0 D28 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 D29 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 D30 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 D31 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 • FADER SELECT Set value Attenuation of front signal Attenuation of rear signal D32 1 0 – 11 – CXA1646Q/CXA1767Q • DATA TIMING CE DATA D1 D2 D3 D31 D32 CLK min 0.5µs max 1MHz min 0.5µs CE min 4µs – 12 – CXA1646Q/CXA1767Q Electrical Characteristics Item Circuit current Total harmonic distortion factor Output noise voltage Maximum output voltage Separation Maximum attenuation factor Loudness Bass max. boost gain Bass max. cut gain Treble max. boost gain Treble max. cut gain Gain switching Input voltage H L LOW HIGH Symbol ICC THD Vn Vom CS ATTm Glb Glh Gbb Gbc Gtb Gtc Gh Vsh Vsl GAIN = VCT DATA, INIT CLK, CE IN11 to 14 IN21 to 24 VRIN1, 2 FDIN1, 2 (VCC = 8V, Ta = 25°C unless otherwise specified) Conditions No signal 1kHz, 5dBm Shortcircuit at input, Aweight 1kHz 1kHz Min. — — — 8 72 85 100Hz, VRC = –16dB 10kHz, VRC = –16dB 7 7 12 12 12 12 5 3 0 Typ. 17 0.005 7 — 90 90 8 8 14 14 14 14 6 — — Max. 21 0.01 10 — — — 9 9 16 16 16 16 7 6 1.5 Unit mA % µVrms dBm dB dB dB dB dB dB dB dB dB V V Input voltage range Vin 1 — VCC – 1 V – 13 – S1 R11 10k R12 RV1 R3 1k OP AMP C11 0.047µ S2 34 29 26 R1 AC V5 C1 220p 5V V4 TEST 22 R6 1k V5 GND 20 NC 19 CXA1646Q NC 18 V2 VCC 17 C2 10µ VCT 16 V1 DATA 15 DATA INIT 14 C1 0.001µ REO2 13 5V 0V CLK CLK 21 0V CE 0V 25 33 32 30 28 27 31 R5 1k 36 35 NC C12 0.047µ C13 C14 10µ C15 0.22µ C17 10µ TCO1 LDLC1 LDHC1 INAO1 TCHC1 TCLC11 TCLC12 FNTO1 NC REO1 24 R7 1k CE 23 37 GAIN1 S14 AC V14 38 IN14 S13 Electrical Characteristic Test Circuit AC V13 39 IN13 VRIN1 FDIN1 S15 S12 5V AC V12 40 IN12 S11 AC V11 41 IN11 LDLC2 LDHC2 INAO2 TCHC2 TCLC21 NC TCLC22 FNTO2 VRIN2 TCO2 1 3 C23 4 7 2 5 6 8 C24 9 FDIN2 10 C27 C25 0.22µ 11 12 C21 0.047µ C22 0.0047µ R21 10k R22 10k NC – 14 – 42 NC 43 NC S21 AC V21 44 IN21 S22 AC V22 45 IN22 S23 AC V23 46 IN23 S24 AC V24 47 IN24 S25 48 GAIN2 OP AMP CXA1646Q/CXA1767Q C12 0.0047µ ON OFF 33 32 30 29 26 25 28 27 31 6DB 0DB C11 0.047µ 36 35 34 NC C14 0.0068µ C15 10µ C13 10µ C16 0.22µ C17 10µ NC Application Circuit TCO1 FDIN1 LDLC1 LDHC1 TCHC1 TCLC11 38 IN14 TEST 22 CLK 21 GND 20 NC 19 CXA1646Q NC 18 VCC 17 VCT 16 DATA 15 INIT 14 C1 0.001µ C2 10µ TCLC12 FNTO1 REO1 24 CE 23 37 GAIN1 39 IN13 40 IN12 41 IN11 42 NC INAO1 VRIN1 C3 33µ FDIN2 LDLC2 TCHC2 TCLC22 NC TCO2 FNTO2 10 11 LDHC2 INAO2 VRIN2 1 4 7 8 2 3 5 6 9 TCLC21 12 ON OFF C23 10µ C25 C24 10µ 0.0068µ 6DB 0DB C21 0.047µ C22 0.0047µ C27 C26 10µ 0.22µ CXA1646Q/CXA1767Q 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. NC – 15 – REO2 13 43 NC 44 IN21 45 IN22 46 IN23 47 IN24 48 GAIN2 CXA1646Q/CXA1767Q CXA1646Q/CXA1767Q Tone control characteristics +14dB 10 +12dB +10dB +8dB +6dB Response [dB] +4dB 0 +2dB 0dB –2dB –4dB –6dB –8dB –10 –10dB –12dB –14dB 10 100 1k Frequency [Hz] 10k 100k CXA1646Q/CXA1767Q Loud characteristics VRC = 0dB 0 VRC = –8dB Response [dB] VRC = –16dB 10 VRC = –24dB –20 10 100 1k Frequency [Hz] 10k – 16 – CXA1646Q/CXA1767Q Setting Constants • LOUD The loudness function achieves the necessary frequency characteristics by passing through filter shown below. The resistor is built in the IC so that fL and fH are set by selecting CLDLC and CLDHC. I/fL = 2π CLDLCR1 I/fH = 2π CLDHCR2 CLDHC R2 7.97k 28k 13.2k R1 5.28k CLDLC AGND AGND fH fL – 17 – CXA1646Q/CXA1767Q • TONE CONTROL The tone control function achieves the necessary frequency characteristics by passing through LPF and HPF shown below. The resistor is built in the IC so that fL and fH are set by selecting CTLC12 and CTCHC. I/fL = 2π CTCLC12 (R3//R4) I/fH = 2π CTCHCR3 LPF R4 8k CTCLC12 R3 8k 8k 8k AGND AGND AGND HPF 10k 10k 10k 10k R3 5k CTCHC AGND AGND fL fH – 18 – CXA1646Q/CXA1767Q • VCT pin The internal circuit of VCT pin has the following structure. Insert a buffer when using it as a reference voltage for an external circuit. VCC 45k VCT 45k GND – 19 – CXA1646Q/CXA1767Q Package Outline CXA1646Q Unit: mm 48PIN QFP (PLASTIC) 15.3 ± 0.4 + 0.4 12.0 – 0.1 + 0.1 0.15 – 0.05 36 25 0.15 37 24 48 13 + 0.2 0.1 – 0.1 1 + 0.15 0.3 – 0.1 12 0.8 ± 0.12 M + 0.35 2.2 – 0.15 PACKAGE STRUCTURE PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE QFP-48P-L04 ∗QFP048-P-1212-B LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT EPOXY RESIN SOLDER / PALLADIUM PLATING COPPER / 42 ALLOY 0.7g NOTE : PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame). – 20 – 0.9 ± 0.2 13.5 CXA1646Q/CXA1767Q CXA1767Q 40PIN QFP (PLASTIC) 9.0 ± 0.4 + 0.4 7.0 – 0.1 30 21 + 0.35 1.5 – 0.15 + 0.1 0.127 – 0.05 0.1 31 20 A 40 11 1 0.65 + 0.15 0.1 – 0.1 + 0.15 0.3 – 0.1 10 ± 0.12 M 0.5 ± 0.2 (8.0) PACKAGE STRUCTURE PACKAGE MATERIAL LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT EPOXY RESIN SOLDER / PALLADIUM PLATING COPPER / 42 ALLOY 0.2g DETAIL A SONY CODE EIAJ CODE JEDEC CODE QFP-40P-L01 ∗QFP040-P-0707 – 21 –