CXA1797Q

CXA1797Q Dolby B-C Type Noise Reduction System with Recording Equalizer Amplifier Description The CXA1797Q is an audio signal processing LSI designed for use in cassette decks. Functions include Dolby B-C noise reduction, recording equalizer amplifier, meter circuit (logarithmic), bias control circuit, and playback switching circuit. Serial control of these functions is possible. Features • Few external parts • Serial control of each functions possible • Dolby B-C noise reduction • Dolby S noise reduction select switch • Recording equalizer amplifier • Recording volume control • Playback input select switch • Meter circuit (logarithmic wave detection) • Bias control circuit (left and right independent) Applications Cassette decks 64 pin QFP (Plastic) Absolute Maximum Ratings (Ta=25°C) • Supply voltage VCC +12 V (between VCC and VEE) • Operating temperature Topr –20 to +75 °C • Storage temperature Tstg –65 to +150 °C • Allowable power dissipation PD 1.02 W Recommended Operating Conditions Supply voltage VCC ±5.25 to ±6.0 Structure Bipolar silicon monolithic IC 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 trade marks 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— E94X42-TE GND Block Diagram C10 3.9k R30 GND 22k C11 2.2µ GND R18 2k R28 (-6dBm) 8.2k C9 2.2µ R29 R17 6.2k C6 3.3k MPX Filter Dolby R16 REC IN MOA OUT C14 200p -23dBv R31 50k -8dBv R51 Gm5 ∗Source Impedance 10kΩ -26dBv 2.2µ GND 600 OSC Dolby S-NR Bias OSC -6dBv TO LINE IN 0.68µ 10k -14dBv L-ch VOL OUT S IN (B) VSG REC OUT -4dBv REA R55 R49 8k 24k Gm3 R13 R3 -10dBv (-30dBm) C3 Dolby REC OUT -4.7dBv R37 -9.6dBv REC Gm2 10k R39 10.3k (C) VGS REC/PB REC PB R22 40k VGS (C) R38 2.8k R50 50k MOA LINE IN -10dBv REC-EQ IN 22k 2.2µ -10 dBv 40k -26dBv (-25dBm) (-6dBm) 40k ×1 BUF OUT R8 R11 (A) GND C20 6.5k 6.5k R7 GND R2 180k 50k LINE IN RVA ×1 R-ch VGS (C) VGS(C) PB (C) VGS R27 R26 SSW Gm1 GND C19 4.7µ R62 10k 220p L2 10mH REC/PB HEAD for R-ch DVCC REC/PB REC 12k BC/S S-NR R24 1.5k R23 VGS VGS (C) (B) [ DECK-B ] PB REC REC/PB PB -EQ GND 50k 50k R4 REC LEVEL R1 (C) (C) VGS VGS BALANCE C16 B/C NR 20k GND (A) Gm4 CONTROL PB REC MOA ×1 100p +6dBv REC/PB (-6dBm) (C) VGS BPF R46 R47 20k 1.5k 22.5k -7dBv (-6dBm) GND C15 R20 1.5k R19 METER DATA PB REC/PB REC (C) VGS (C) VGS R40 17k 10k R44 VEE B/C NR R34 7.5k Gain 12dB up R45 8.5k R32 2.5k Dolby B/C-NR SSK HLS VF VGS (C) -1dBv LINE LLS VF ANTS GND GND(VG) VCC BVG Bias 1.25v METAL METAL VEE MTR R54 METAL 150 EQ NORM CrO 2 BIAS OUT BIAS-N BIAS-C BIAS-M R53 VEE R6 REC/PB IREF BIAS DVCC 27k DVCC GND GND DGND VEE R5 DOLBY IREF R9 50k PB -EQ VGS (B) R35 R33 8k 8k C1 PB IN2 VGS (C) DGND 50k GND (-30dBm) -31dBv Dolby PB IN Dolby TC1 Dolby TC2 C5 2.2µ 2.2µ -21dBv 76k C17 R52 4k 100p METER AC C13 1.0µ DGND METER OUT to METER IC C18 C12 4.7µ (0dBm) -1dBv LINE OUT R10 VEE VGS (C) R15 C7 0.1µ C8 0.068µ 10k L1 5.6mH -21dBv PB OUT R12 -6dBv R36 7.5k R42 GND 4.7k R41 GND 100k R43 10k HP Amp for R-ch R48 220 GND R-ch GND for R-ch GND HAEDPHONES 3.3µ 4.7k L-ch 22k [ DECK-A ] B DECK PRE DECK A/B 0dB=2.4v R57 2.2µ -21dBv -21dBv R58 R59 R60 600 22k 130k PB Only HEAD 20k C2 PB IN1 A DECK R14 22k VEE VEE LINE OUT C4 390p GND GND GND ∗Load Impedance 47kohm 10k GND From LINE OUT -6dBv R63 FQ CAL —2— 1.5k 22.5k SSW VEE CALIBRATION R61 50k VCC VCC BC/S S-NR -7dBv (-6dBm) GND (A) GH CAL R56 50k to Control IC XRESET R25 12k R21 REC CAL 50k (0dBm) -6dBv -1dBv 100p LATCH ×1 VGS (C) CLK Dolby-NR Dolby-NR Dolby-NR Dolby-NR METER PB-DECK LINE-MUTE Tape-EQ METAL SPEED REC-MUTE OFF/ON B/C BC/S REC/PB NOR/CAL A/B OFF/ON 120µ/70µ OFF/ON NORM/HIGH OFF/ON DVCC VM CXA1797Q Pin Configuration REC ED OUT2 RECMUTE TC S TC 34 33 BUFFER OUT2 REC EQ IN2 VOLUME OUT2 DOLBY TCL2 DOLBY TCH2 DOLBY OUT2 DOLBY S IN2 LINE OUT2 REC OUT2 METER TC2 BIAS2 METRL BIAS2 NORMAL BIAS2 OUT REC IN2 51 50 49 48 47 46 45 44 43 42 40 39 38 36 35 41 BIAS2 CrO2 37 32 30 31 B/C VOLUME IN2 REC-EQ BIAS-SW SPEED ME TAL 120µ/70µ AMUTE 52 VOLUME METER OUT2 VCC DVCC REC CAL DOLBY PBIN2 PB OUT2 PB LMUTE REC A MOA NM 54 53 REC CAL B/C DOLBY B/C NR PB METER1 25 NA B/C DOLBY IREF GND PB MOA CAL A REC LMUTE REC VCS LINE PB PB 59 26 B/C DOLBY B/C NR 23 21 22 120µ/70µ AMUTE SPEED ME TAL PB IN B1 61 B DECK 24 S PB IN A1 60 PB OUT1 62 DOLBY PBIN1 VOLUME 63 1 REC IN1 DOLBY TCL1 DOLBY TCH1 BUFFER OUT1 VOLUME OUT1 2 3 4 5 6 LINE OUT1 7 DOLBY OUT1 8 DOLBY S IN1 9 REC OUT1 10 11 12 13 14 15 16 17 18 19 NR TC REC EQ IN1 METER TC1 BIAS1 METAL BIAS1 CrO2 BIAS1 OUT B/C TC REC EQ OUT1 BIAS1 NORMAL METER OUT1 20 BIAS-SW VOLUME IN1 64 —3— CXA1797Q REC-EQ CONT GND 58 METER2 27 REC/PB IREF 57 28 S PB IN A2 56 VC5 29 PB IN B2 LINE 55 DECK B PB FQ CAL GH CAL BALANCE REC LEVEL DGND DATA CLK LATCH XRESET VEE CXA1797Q CXA1797Q Pin Description Pin No. Symbol (Ta = 25°C, dual-power supply configuration, VCC = 5.5 V, VEE = 5.5 V, DVCC = 5.0 V) Typical pin voltage DC AC I/O Z (in) Equivalent circuit Description VCC 500 VEE VCC 2 VOLUME OUT1 50 VOLUME OUT2 500 500 1 BUFFER OUT1 51 BUFFER OUT2 0.0V –10dBv O — 6.5k 147 Recording volume input buffer output 0.0V –10dBv O — 500 6.5k 147 Recording volume output VEE VCC VCT 3 REC IN1 49 REC IN2 0.0V –26dBv (–25dBm) I 40kΩ 40k Recording input 147 VEE VCC 4 DOLBY TCH 1 48 DOLBY TCH2 VEE +0.4V 13k 36k — — — 147 Time constant for the HLS 330k VEE —4— CXA1797Q Pin No. Symbol Typical pin voltage DC AC I/O Z (in) Equivalent circuit Description VCC 13.5k 5 DOLBY TCL1 47 DOLBY TCL2 VEE +0.9V — — — 147 Time constant for the LLS 480k VEE VCC 6 LINE OUT1 46 LINE OUT2 0.0V –1dBv (0dBm) 300 O — 8k 147 Line output VEE VCC 7 DOLBY OUT1 45 DOLBY OUT2 0.0V –7dBv (–6dBm) 200 300 O — 12k Dolby S NR output 200 147 VEE VCC 0.0V O 147 1.5k 22k 8 DOLBY S IN1 44 DOLBY S IN2 –7dBv (–6dBm) 23.5kΩ Dolby S NR input VCT VEE —5— CXA1797Q Pin No. Symbol Typical pin voltage DC AC I/O Z (in) Equivalent circuit Description VCC VEE 200 9 REC OUT1 43 REC OUT2 0.0V –7dBv (–6dBm) 200 O — 147 Recording output VCC 10 REC EQ IN1 42 REC EQ IN2 Recording 0.0V –23dBv I 50kΩ 147 VCT VEE 50k equalizer amplifier input VCC 300 8.5k 300 11 METER AC1 41 METER AC2 0.0V — — — DC cut capacitance VEE VCC 12 REC EQ OUT1 40 REC EQ OUT2 0.0V –4dBV O — 50k VEE —6— 200 147 Recording equalizer amplifier output 200 CXA1797Q Pin No. Symbol Typical pin voltage DC AC I/O Z (in) Equivalent circuit Description VCC 13 39 14 38 15 37 BIAS MTL1 BIAS MTL2 BIAS CrO1 BIAS CrO2 BIAS NORM1 BIAS NORM2 VEE +1.25V — I — 147 Recording bias control voltage setting VEE VCC 16 BIAS OUT1 36 BIAS OUT2 — — O — 147 Recording bias control voltage output VEE VCC 17 NR TC 18 B/C TC 34 S TC — — I/O 17kΩ 17k 147 VEE Time constant for selecting NR mode Time constant for selecting B/C mode Time constant for selecting S and B/C modes VCC 100p 4k DGND VEE 76.6k —7— 150 19 METER OUT1 33 METER OUT2 2.4V — O — Meter output (sensitivity: 65 mV/dB) CXA1797Q Pin No. Symbol Typical pin voltage DC AC I/O Z (in) Equivalent circuit Description Negative power supply (Connect to ground when using a single power supply) Positive power supply 20 VEE 32 VCC –5.5V +5.5V — I — VCC 21 XRESET 22 LATCH 23 CLK — — I — 2k 2.5V DGND reference Reset signal input (active low) Load signal input Clock input DGND VEE VCC 24 DATA — — I — 4k 2.5V DGND reference Data input DGND VEE 25 DGND 0V — I — Logic and CAL reference VCC 26 REC LEVEL 0V — I 147 DGND VEE —8— 40k 60k 100kΩ Recording volume adjustment CXA1797Q Pin No. Symbol Typical pin voltage DC AC I/O Z (in) Equivalent circuit Description VCC 70k 147 27 REC BALANCE 2.5V — I 100kΩ DREF VEE Recording volume balance adjustment VCC 30k High-frequency gain adjustment of recording equalizer amplifier Peak frequency Q adjustment of recording equalizer amplifier 28 GH CAL 29 FQ CAL 2.5V — I 54kΩ 147 54k VEE VCC 30 REC CAL 2.5V — I 54kΩ 147 54k Recording equalizer amplifier gain adjustment VEE VCC 31 DVCC +5.0V — I — DREF Logic power supply (DREF = 1/2 (DVCC + DGND) is CAL reference.) 30k DGND VEE DVCC —9— 30k CXA1797Q Pin No. Symbol Typical pin voltage DC AC I/O Z (in) Equivalent circuit Description VCC 35 RECMUTE TC — — I/O 17kΩ 17k VEE 147 Time constant for selecting RECMUTE mode VCC 52 LINE IN2 64 LINE IN1 0.0V –10dBv I 50kΩ 147 Recording volume input 50k VCT VEE VCC VCT 53 DOLBY PBIN2 63 DOLBY PBIN1 0.0V –31dBv (–30dBm) I 40kΩ 40k Playback input 147 VEE VCC VEE —10— 300 54 PBOUT2 62 PBOUT1 0.0V –21dBv O — 147 Head select output of playback equalizer amplifier 300 CXA1797Q Pin No. Symbol Typical pin voltage DC AC I/O Z (in) Equivalent circuit Description VCC 55 56 60 61 PB IN B2 PB IN A2 PB IN A1 PB IN B1 0.0V –21dBv I 50kΩ VCT 50k 147 Head select input of playback equalizer amplifier VEE VCC 192 57 REC IREF VEE+ 1.25V — — — 147 Reference current of recording equalizer amplifier VEE VCC 30k 58 GND 0V — — — 30k Ground (center capacitance when using a single power supply) VEE VCC 59 DOLBY IREF VEE+ 1.25V — — — 147 VEE+1.25V Reference current VEE —11— CXA1797Q Electrical Characteristics Table (Ta = 25°C, dual-power supply configuration, VCC = 5.5 V, VEE = 5.5 V, DVCC = 5.0 V) Block Entire LSI Item Operating voltage range 1 (positive/negative dual power supplies) Operating voltage range 2 (single power supply) Current consumption (ICC) No signal, no load, VCC = ± 5.5 V Conditions Specifications Min. Typ. Max. ±5.25 ±5.5 ±6.0 V Unit Entire LSI 10.5 11.0 12.0 V Entire LSI 25.0 40.0 55.0 mA Recording Recording equalizer amplifier Recording equalizer amplifier reference output level (315 Hz) — –4.0 — equalizer amplifier Recording reference output level (This output level is the tape reference 0 dB which NORM-NORM mode generate magnetic flux of 250 nWb/m) All of the recording equalizer amplifier blocks use this level as their reference level. Recording Recording equalizer amplifier Input level when the reference output level is 315 Hz, –24.5 –23.0 –21.5 equalizer amplifier Recording reference input level -4 dBv NORM-NORM mode (For measurement, input a 315 Hz, -23 dBv signal to the REC EQ IN pins and then measure the output level.) Recording NORM-NORM mode NORM-tape, NORM-speed mode –1.7 –0.7 –0.3 equalizer amplifier REC-EQ frequency response 1 Input a 3 kHz signal (-20 dB level down) to the REC EQ (3 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording NORM-NORM mode NORM-tape, NORM-speed mode 2.9 4.9 6.9 equalizer amplifier REC-EQ frequency response 2 Input an 8 kHz signal (-20 dB level down) to the REC EQ (8 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording NORM-NORM mode NORM-tape, NORM-speed mode 7.8 10.8 13.8 equalizer amplifier REC-EQ frequency response 3 Input a 12 kHz signal (-20 dB level down) from the (12 kHz, -20 dB) reference to the REC EQ IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording CrO2-NORM mode CrO2-tape, NORM-speed mode 2.1 3.1 4.1 equalizer amplifier REC-EQ frequency response 1 Input a 3 kHz signal (-20 dB level down) to the REC EQ (3 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording CrO2-NORM mode CrO2-tape, NORM-speed mode 4.5 6.5 8.5 equalizer amplifier REC-EQ frequency response 2 Input an 8 kHz signal (-20 dB level down) to the REC EQ (8 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording CrO2-NORM mode CrO2-tape, NORM-speed mode 8.0 11.0 14.0 equalizer amplifier REC-EQ frequency response 3 Input a 12 kHz signal (-20 dB level down) to the REC EQ (12 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording METAL-NORM mode METAL-tape, NORM-speed mode 3.7 4.7 5.7 equalizer amplifier REC-EQ frequency response 1 Input a 3 kHz signal (-20 dB level down) to the REC EQ (3 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording METAL-NORM mode METAL-tape, NORM-speed mode 5.7 7.7 9.7 equalizer amplifier REC-EQ frequency response 2 Input an 8 kHz signal (-20 dB level down) to the REC EQ (8 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording METAL-NORM mode METAL-tape, NORM-speed mode 8.4 11.4 14.4 equalizer amplifier REC-EQ frequency response 3 Input a 12 kHz signal (-20 dB level down) to the REC EQ (12 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. dBv dBv dB dB dB dB dB dB dB dB dB —12— CXA1797Q Block Item Conditions Specifications Min. Typ. Max. Unit dB Recording NORM-HIGH mode equalizer amplifier REC-EQ frequency response 1 (5 kHz, -20 dB) NORM-tape, HIGH-speed mode Input a 5 kHz signal (-20 dB level down)to the REC EQ IN pin and then measure the relative deviation from NORMNS, 315 Hz mode. Recording NORM-HIGH mode NORM-tape, HIGH-speed mode equalizer amplifier REC-EQ frequency response 2 Input a 15 kHz signal (-20 dB level down) to the REC EQ (15 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording NORM-HIGH mode NORM-tape, HIGH-speed mode equalizer amplifier REC-EQ frequency response 3 Input a 20 kHz signal (-20 dB level down) to the REC EQ (20 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording CrO2-HIGH mode CrO2-tape, HIGH-speed mode equalizer amplifier REC-EQ frequency response 1 Input a 5 kHz signal (-20 dB level down) to the REC EQ (5 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording CrO2-HIGH mode CrO2-tape, HIGH-speed mode equalizer amplifier REC-EQ frequency response 2 Input a 15 kHz signal (-20 dB level down) to the REC EQ (15 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording CrO2-HIGH mode CrO2-tape, HIGH-speed mode equalizer amplifier REC-EQ frequency response 3 Input a 20 kHz signal (-20 dB level down) to the REC EQ (20 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording METAL-HIGH mode METAL-tape, HIGH-speed mode equalizer amplifier REC-EQ frequency response 1 Input a 5 kHz signal (-20 dB level down) to the REC EQ (5 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording METAL-HIGH mode METAL-tape, HIGH-speed mode equalizer amplifier REC-EQ frequency response 2 Input a 15 kHz signal (-20 dB level down) to the REC EQ (15 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording METAL-HIGH mode METAL-tape, HIGH-speed mode equalizer amplifier REC-EQ frequency response 3 Input a 20 kHz signal (-20 dB level down) to the REC EQ (20 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording NORM-NORM mode NORM-tape, NORM-speed mode equalizer amplifier Channel crosstalk Alternately input a 1 kHz signal (+12 dB level up) and (1 kHz, +12 dB, 1 kHz BPF) measure the channel crosstalk. (Use a 1 kHz BPF.) Recording NORM-NORM mode NORM-tape, NORM-speed mode, RL = 2.7 kΩ equalizer amplifier REC-EQ signal handling Input a 1 kHz signal and set the output level so that THD (1 kHz, THD = 1%, RL = 2.7 kΩ) (total harmonic distortion) is 1%. (Measure the distortion of a +9 dB level-up signal.) Recording NORM-NORM mode NORM-tape, NORM-speed mode, RL = 2.7 kΩ equalizer amplifier REC-EQ total harmonic distortion Input a 1 kHz, 0 dB (reference input level) signal and (1 kHz, 0.0 dB, RL = 2.7 kΩ) measure the distortion. (Measure the distortion as THD + N.) Recording NORM-NORM mode NORM-tape, NORM-speed mode, Rg = 5.1 kΩ equalizer amplifier REC-EQ S/N ratio 1 With no signal, measure the noise using the "A"-WGT ("A"-WGT filter) filter. (The measured value is indicated as the relative value compared to the reference level.) Recording NORM-NORM mode NORM-tape, NORM-speed mode equalizer amplifier Output DC offset voltage With no signal, measure the DC offset voltage of the REC (REC OUT pin) OUT pin. –6.2 –5.2 –4.2 –0.5 1.5 3.5 dB 3.0 6.0 9.0 dB –1.7 –0.7 0.3 dB 1.4 3.4 5.4 dB 4.1 7.1 10.1 dB 1.0 2.0 3.0 dB 2.1 4.1 6.1 dB 4.3 7.3 10.3 dB — –90.0 –80.0 dB 9.0 11.0 — dB — 0.02 0.6 % 57.0 67.0 — dB –0.5 0.0 0.5 V —13— CXA1797Q Block Item Conditions NORM-tape, NORM-speed mode, REC-MUTE ON Input a 1 kHz signal (+12 dB level up) and measure the attenuation when REC MUTE is on. (Use a 1 kHz BPF.) NORM-tape, NORM-speed mode, REC-CAL = 5.0 V Input a 1 kHz signal (-20 dB level down) and measure the amount of change compared to when the REC-CAL function is at the standard setting. NORM-tape, NORM-speed mode, REC-CAL = 0.0 V Input a 1 kHz signal (-20 dB level down) and measure the amount of change compared to when the REC-CAL function is at the standard setting. NORM-tape, NORM-speed mode, GH-CAL = 5.0 V Input an 8 kHz signal (-20 dB level down) and measure the amount of change compared to when the GH-CAL function is at the standard setting. NORM-tape, NORM-speed mode, GH-CAL = 0.0 V Input an 8 kHz signal (-20 dB level down) and measure the amount of change compared to when the GH-CAL function is at the standard setting. NORM-tape, NORM-speed mode, fQ-CAL = 5.0 V Input an 8 kHz signal (-20 dB level down) and measure the amount of change compared to when the fQ-CAL function is at the standard setting. NORM-tape, NORM-speed mode, fQ-CAL = 5.0 V Input a 12 kHz signal (-20 dB level down) and measure the amount of change compared to when the fQ-CAL function is at the standard setting. NORM-tape, NORM-speed mode, fQ-CAL = 0.0 V Input an 8 kHz signal (-20 dB level down) and measure the amount of change compared to when the fQ-CAL function is at the standard setting. NORM-tape, NORM-speed mode, fQ-CAL = 0.0 V Input a 12 kHz signal (-20 dB level down) and measure the amount of change compared to when the fQ-CAL function is at the standard setting. REC-VOL = 5.0 V, REC-BAL = 2.5 V Input a 1 kHz, -10 dBv signal to the LINE IN pin and measure the full gain of the recording volume amplifier. Specifications Min. Typ. Max. Unit Recording NORM-NORM mode equalizer amplifier REC-EQ mute characteristics Recording NORM-NORM mode equalizer amplifier REC-EQ REC-CAL characteristics 1 (REC-CAL = 5.0 V) Recording NORM-NORM mode equalizer amplifier REC-EQ REC-CAL characteristics 2 (REC-CAL = 0.0 V) Recording NORM-NORM mode equalizer amplifier REC-EQ GH-CAL characteristics 1 (GH-CAL = 5.0 V) Recording NORM-NORM mode equalizer amplifier REC-EQ GH-CAL characteristics 2 (GH-CAL = 0.0 V) Recording NORM-NORM mode equalizer amplifier REC-EQ fQ-CAL characteristics 1-1 (fQ-CAL = 5.0 V) Recording NORM-NORM mode equalizer amplifier REC-EQ fQ-CAL characteristics 1-2 (fQ-CAL = 5.0 V) Recording NORM-NORM mode equalizer amplifier REC-EQ fQ-CAL characteristics 2-1 (fQ-CAL = 0.0 V) Recording NORM-NORM mode equalizer amplifier REC-EQ fQ-CAL characteristics 2-2 (fQ-CAL = 0.0 V) Recording volume Recording volume amplifier Recording volume characteristics 1 (REC-VOL = 5.0 V, REC-BAL = 2.5 V) Recording volume Recording volume amplifier Recording volume characteristics 2 (REC-VOL = 2.0 V, REC-BAL = 2.5 V) Recording volume Recording volume amplifier Recording volume attenuation (REC-VOL = 0.0 V, REC-BAL = 2.5 V) Recording volume Recording volume amplifier REC-VOL signal handling (1 kHz, THD = 1%, RL = 2.7 kΩ) Recording volume Recording volume amplifier REC-VOL total harmonic distortion (1 kHz, -10.0 dBv, RL = 2.7 kΩ) — –88.0 –80.0 dB 4.6 6.1 7.6 dB –8.0 –6.5 –5.0 dB 0.7 2.2 3.7 dB –2.8 –1.3 0.2 dB –5.9 –4.4 –2.9 dB –8.4 –6.9 –5.4 dB 5.0 6.5 8.0 dB 4.9 6.4 7.9 dB 7.9 9.4 10.9 dB REC-VOL = 2.0 V, REC-BAL = 2.5 V –10.2 –8.7 –7.2 dB Input a 1 kHz, -10 dBv signal to the LINE IN pin and measure the attenuation of the recording volume amplifier. REC-VOL = 0.0 V, REC-BAL = 2.5 V — –86.0 –80.0 dB Input a 1 kHz, +2 dBv signal and measure the maximum volume attenuation of the recording volume amplifier. (Use a 1 kHz BPF.) REC-VOL = 2.0 V, REC-BAL = 2.5 V, RL = 2.7 kΩ 12.0 12.5 — dB Input a 1 kHz signal and set the input level so that the THD is 1%. (Measure the distortion when the output is +2 dBv.) REC-VOL = 2.0 V, REC-BAL = 2.5 V, RL = 2.7 kΩ — 0.15 0.5 % Input a 1 kHz, -10 dBv signal (reference input level) and measure the distortion. (Measure the distortion as THD + N.) —14— CXA1797Q Block Item Conditions Specifications Min. Typ. Max. Unit Recording volume Recording volume amplifier REC-VOL S/N ratio 1 ("A"-WGT filter) Recording volume Recording volume amplifier Output DC offset voltage (VOL OUT pin) Recording volume Recording volume amplifier REC-VOL balance characteristics 1 (REC-VOL = 5.0 V, REC-BAL = 0.0 V) Recording volume Recording volume amplifier REC-VOL balance characteristics 2 (REC-VOL = 5.0 V, REC-BAL = 5.0 V) Recording volume Recording volume amplifier Channel crosstalk (REC-VOL = 5.0 V, REC BAL = 2.5 V) Recording volume Input buffer gain (1 kHz, -10.0 dBv) Line amplifier Line amplifier gain (1 kHz, -30 dBm) Line amplifier Signal handling (1 kHz, THD = 1%) Line amplifier Line amplifier total harmonic distortion (1 kHz, -30 dBm) Line amplifier Line amplifier S/N ratio ("A"-WGT filter) Line amplifier Output DC offset voltage (LINE OUT pin) Line amplifier MUTE mode characteristics (1 kHz BPF) Line amplifier Channel crosstalk (1 kHz, -14.0 dBv, 1 kHz BPF) Level meter amplifier Level meter characteristics 1 (REC IN = 1 kHz, -26 dBv) REC-VOL = 5.0 V, REC-BAL = 2.5 V 80.0 83.0 — dB With no signal, measure the noise using an "A"-WGT filter. (The measured value is indicated as the relative value compared to the full-gain level.) REC-VOL = 5.0 V, REC-BAL = 2.5 V –0.15 0.0 0.15 V With no signal, measure the DC offset voltage of the VOL OUT pin. REC-VOL = 5.0 V, REC-BAL = 0.0 V (1 kHz BPF) — –96.0 –60.0 dB Input a 1 kHz, +2 dBv signal and measure the attenuation of VOL OUT 1. (Input -10 dBv and confirm that there is no attenuation at VOL OUT 2.) REC-VOL = 5.0 V, REC-BAL = 5.0 V (1 kHz BPF) Input -10 dBv and confirm that there is no attenuation at VOL OUT 1. (Input a 1 kHz, +2 dBv signal and measure the attenuation of VOL OUT 2.) REC-VOL = 5.0 V, REC-BAL = 2.5 V Alternately input a 1 kHz, +2 dBv signal, and measure the channel crosstalk. (Use a 1 kHz BPF.) Input a 1 kHz, -10 dBv signal to the LINE IN pin and measure the gain at the BUF OUT pin. PB mode Input a 1 kHz, -30 dBm signal to the DOLBY PBIN pin and measure the output level at the LINE OUT pins. PB mode Input a 1 kHz signal and set the output level so that the THD is 1%. PB mode Input a 1 kHz, -30 dBm signal (reference input level) and measure the distortion. (Measure the distortion as THD + N.) –1.0 0.0 1.0 dB — –98.0 –80.0 dB –1.0 0.0 1.0 dB –1.0 0.0 1.0 dBm Line amplifier 12.0 12.6 — dB Line amplifier — 0.02 0.5 % Line amplifier Line amplifier Line amplifier Line amplifier Level meter PB mode 80.0 82.5 — dB With no signal, measure the noise using an "A"-WGT filter. (The measured value is indicated as the relative value compared to the reference level.) REC mode –0.2 –0.1 0.2 V With no signal, measure the DC offset voltage of the LINE OUT pin. PB, MUTE mode — –107.0 –80.0 dB Input a 1 kHz, -18 dBm signal to the DOLBY PB IN pin and measure the attenuation when LINE MUTE is on. (Use a 1 kHz BPF.) PB mode — –94.0 –80.0 dB Alternately input a 1 kHz, -18 dBm signal to the DOLBY PB IN pin and measure the channel crosstalk. (Use a 1 kHz BPF.) METER ON, REC mode 2.5 2.8 3.1 V Input a 1 kHz, -26 dBv signal to the REC IN pin and measure the output DC voltage at the METER pin. —15— CXA1797Q Block Level meter Item Level meter amplifier Level meter characteristics 2 (REC IN = 1 kHz, -22 dBv) Level meter amplifier Level meter characteristics 3 (REC IN = 1 kHz, -36 dBv) Level meter amplifier Level meter characteristics 4 (REC IN = 1 kHz, -46 dBv) Level meter amplifier Level meter characteristics 5 (REC IN = no signal) Level meter amplifier Level meter CAL characteristics (REC IN = 1 kHz, -58 dBv) Playback input switch gain (PB IN = 1 kHz, -21 dBv) Playback input switch Signal handling (1 kHz, THD = 1%) Playback input switch Total harmonic distortion (1 kHz, -21 dBv) Playback input switch S/N ratio ("A"-WGT filter) Playback input switch A/B DECK crosstalk A-DECK mode Playback input switch Output DC offset voltage (PB OUT pin) Bias maximum output voltage NORMAL mode Bias output voltage 1 Conditions Specifications Min. Typ. Max. Unit V Level meter Level meter Level meter Level meter Playback input switch Playback input switch Playback input switch METER ON, REC mode 2.75 Input a 1 kHz, -22 dBv (+4 dB level up) signal to the REC IN pin and measure the output DC voltage at the METER pin. METER ON, REC mode 1.85 Input a 1 kHz, -36 dBv (-10 dB level down) signal to the REC IN pin and measure the output DC voltage at the METER pin. METER ON, REC mode 1.2 Input a 1 kHz, -46 dBv (-20 dB level down) signal to the REC IN pin and measure the output DC voltage at the METER pin. METER ON, REC mode — With no signal, measure the DC offset voltage at the METER pin. CAL ON, REC mode 1.2 Input a 1 kHz, -58 dBv (-32 dB level down) signal to the REC IN pin and measure the output DC voltage at the METER pin. Input a 1 kHz, -21 dBv signal to the PB IN pin and –22.0 measure the level. A-DECK mode Input a 1 kHz signal to the PB IN1 pin and set the output level so that the THD is 1%. A-DECK mode Input a 1 kHz, -10 dBv signal (input reference level) to the PB IN1 pin and measure the distortion. (Measure the distortion as THD + N.) A-DECK mode With no signal, measure the noise using the "A"-WGT filter. (The measured value is indicated as the relative value compared to the reference level.) A-DECK mode Input a 1 kHz, -9 dBv (+12 dB level up) signal to the BDECK side and measure the A/B-DECK crosstalk. (Use a 1 kHz BPF.) A-DECK mode With no signal, measure the DC offset voltage of the PB OUT pin. BIAS ON mode, RL = 4.7 kΩ Measure the output DC voltage of the BIAS OUT pin. NORMAL mode Set the external feedback resistance to 56 kΩ, 11 kΩ, 11 kΩ, and 11 kΩ, and measure the output DC voltage of the BIAS OUT pin. CrO2 mode Set the external feedback resistance to 56 kΩ, 11 kΩ, 11 kΩ, and 11 kΩ, and measure the output DC voltage of the BIAS OUT pin. METAL mode Set the external feedback resistance to 56 kΩ, 11 kΩ, 11 kΩ, and 11 kΩ, and measure the output DC voltage of the BIAS OUT pin. 3.05 3.35 2.15 2.45 V 1.5 1.8 V 0.01 0.1 V 1.5 1.8 V –21.0 –20.0 dBv 12.0 30.0 — dB — 0.02 0.5 % Playback input switch 80.0 84.0 — dB Playback input switch — –89.0 –80.0 dB Playback input switch BIAS SW BIAS SW –0.2 0.0 0.2 V 4.8 5.0 — V V –2.4 –2.2 –2.0 BIAS SW CrO2 mode Bias output voltage 2 –0.75 –0.5 –0.25 V BIAS SW METAL mode Bias output voltage 3 4.2 4.5 4.8 V —16— CXA1797Q Block DOLBY DOLBY Item Dolby reference level REC mode REC IN level Conditions Value at the Dolby reference level of the REC OUT pin Specifications Min. Typ. Max. — –6.0 — Unit dBm DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY REC mode, NR off, f = 1 kHz Input a signal to the REC IN pin and measure the level at which the level of the DOLBY OUT pin reaches -6 dBm. PB mode PB mode, NR off, f = 1 kHz PB IN level Input a signal to the NR PB IN pin and measure the level at which the level of the DOLBY OUT pin reaches -6 dBm. B type encoding REC, Dolby B mode Boost characteristics 1 Input a 500 Hz, -25 dB signal to the REC IN pin and measure the boost at the REC OUT pin. B type encoding REC, Dolby B mode Boost characteristics 2 Input a 5 kHz, -25 dB signal to the REC IN pin and measure the boost at the REC OUT pin. B type encoding REC, Dolby B mode Boost characteristics 3 Input a 10 kHz, -40 dB signal to the REC IN pin and measure the boost at the REC OUT pin. B type encoding REC, Dolby B mode Boost characteristics 4 Input a 10 kHz, 0 dB signal to the REC IN pin and measure the boost at the REC OUT pin. C type encoding REC, Dolby C mode Boost characteristics 1 Input a 500 Hz, -60 dB signal to the REC IN pin and measure the boost at the REC OUT pin. C type encoding REC, Dolby C mode Boost characteristics 2 Input a 500 Hz, -25 dB signal to the REC IN pin and measure the boost at the REC OUT pin. C type encoding REC, Dolby C mode Boost characteristics 3 Input a 2 kHz, -60 dB signal to the REC IN pin and measure the boost at the REC OUT pin. C type encoding REC, Dolby C mode Boost characteristics 4 Input a 2 kHz, -25 dB signal to the REC IN pin and measure the boost at the REC OUT pin. C type encoding REC, Dolby C mode Boost characteristics 5 Input a 5 kHz, -25 dB signal to the REC IN pin and measure the boost at the REC OUT pin. C type encoding REC, Dolby C mode Boost characteristics 6 Input a 10 kHz, 0 dB signal to the REC IN pin and measure the boost at the REC OUT pin. PB mode PB, Dolby off mode Frequency response Input a 20 kHz, -30 dBm signal to the NR PB IN pin and measure the output at the REC OUT pin. REC mode REC, NR off mode Signal handling Input a 1 kHz signal and set the output level so that the THD is 1%. (Measure the distortion using a signal boosted 13.5 dB from the reference.) NR OFF total harmonic distortion REC, NR off mode Input a 1 kHz, +10 dB signal to the REC IN pin and measure the distortion. (Measure the distortion as THD + N.) Dolby B total harmonic distortion REC, Dolby B mode Input a 1 kHz, +10 dB signal to the REC IN pin and measure the distortion. (Measure the distortion as THD + N.) –26.0 –25.0 –24.0 dBm –31.0 –30.0 –29.0 dBm 1.4 2.9 4.4 dB 3.9 5.4 6.9 dB 9.7 10.4 11.4 dB –1.1 0.4 1.9 dB 14.2 16.2 18.2 dB 7.2 9.2 11.2 dB 18.7 20.7 22.7 dB 5.4 7.4 9.4 dB 3.5 5.5 7.5 dB –5.5 –3.5 –1.5 dB –7.5 –6.0 –4.5 dBm 13.5 15.8 — dB — 0.02 0.15 % — 0.04 0.2 % —17— CXA1797Q Block DOLBY Item Conditions Specifications Min. Typ. Max. Unit % DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY Logic Logic Logic Logic Logic Logic Logic Logic Logic Logic Dolby C total harmonic distortion REC, Dolby C mode — Input a 1 kHz, +10 dB signal to the REC IN pin and measure the distortion. (Measure the distortion as THD + N.) REC mode REC, Dolby C mode, Rg = 5.1 kΩ 60.0 Dolby C S/N ratio With no signal, measure the noise using the CCIR/ARM filter. (The measured value is indicated as the relative value compared to the DOLBY OUT level.) PB mode PB, NR off mode — Recording → playback crosstalk Input a 1 kHz, +10 dB signal to the REC IN pin and measure the REC → PB crosstalk. (Use a 1 kHz BPF.) REC mode REC, NR off mode — Playback → recording crosstalk Input a 1 kHz, +10 dB signal to the NR PB IN pin and measure the PB → REC crosstalk. (Use a 1 kHz BPF.) REC mode PB, NR off mode — Channel crosstalk Input a 1 kHz, +10 dB signal to the REC IN pin and measure the channel crosstalk. (Use a 1 kHz BPF.) PB mode PB, NR off mode — Channel crosstalk Input a 1 kHz, +10 dB signal to the NR PB IN pin and measure the channel crosstalk. (Ues a 1 kHz BPF.) REC mode REC mode, NR off → B type –100 Output DC offset voltage 1 With no signal, measure the deviation in the output DC (REC OUT pin) offset voltage at the REC OUT pin when switching from NR off mode to B type mode. REC mode REC mode, NR off → C type –100 Output DC offset voltage 2 With no signal, measure the deviation in the output DC (REC OUT pin) offset voltage at the REC OUT pin when switching from NR off mode to C type mode. High level input voltage ViH 3.5 Low level input voltage Clock frequency Clock pulse width Data setup time Data hold time Latch pulse width Latch setup time Latch hold time Reset pulse width ViL fck tw tsu(DATA→CLK) tH(CLK→DATA) tw(DATA) ts(LATCH→DATA) tH(CLK→LATCH) tw(XRST) — — 1 1 1 1 1 1 1 0.08 0.3 61.0 — dB –79 –70 dB –90 –70 dB –84 –65 dB –85 –65 dB — 100 mV — 100 mV — — — — — — — — — — — 1.5 500 — — — — — — — V V kHz µs µs µs µs µs µs µs —18— C8 S7 C2 S13 0.1µ Electrical Characteristics Measurement Circuit 0.1µ -21dBV S11 C7 0.1µ -21dBV S10 C6 0.1µ -21dBV C3 R33 100 R37 S17 100 R41 10k R45* 75.9k 0dBm R49 10k R51 10k S20 S14 S14 R35 2.7k S19A R39 2.7k R43* 10k R47* C17 0.1µ C19 0.01µ 10k C11 0.1µ C13 -21dBV BUFFER OUT1 VOLUMU OUT1 50 VOLUME OUT2 -10dBV 0.1µ S22 C15 -25dBm 0.1µ S24 10k 10k 49 REC IN1 DOLBY TCH1 C21 0.068µ S26 S27 DOLBY TCL1 C23 0.01µ S28A R53 2.7k S33A R59 2.7k C25 R55 100 R57 S29 S31 LINE OUT1 0.1µ C27 -1dBv 0.1µ -6dBm S36 DOLBY OUT1 10k R61 S34 -6dBm S38A R69 2.7k R75 5.1k R79* C31 DOLBY S IN1 100 R71 S39 10k R73* S41 100 R77* DOLBY REC OUT1 0.1µ S43 -6dBm C33 -23dBv 0.1µ DOLBY REC OUT1 CXA1797Q REC EQ IN1 41 5.1k S45A C35 0.68µ R81 C37 0.1µ -4dBv 11 BOOST1 32.1k 0dBv R83 S46 2.7k R87 11k 11k REC EQ OUT1 100 R85 S48 10k BIAS METAL 14 BIAS CrO2 BIAS NORMAL S50 16 S52A R97 S53 R95 3.3k C39 BIAS OUT1 10k R99 10k R101 10k R103 10k 35 S55 4.7µ C41 NR TC 34 S57 B/C TC 4.7µ C43 S59 3.3µ METER OUT1 VEE V26 0 D21 D23 D24 D22 10µ C45 V27 0 V28 0 V29 0 V30 0 C46 10µ 10µ C47 XRESET GND GND 10k —19— S504 S503 S505 S502 •0dB=1Vrms for other tests •0dBm=.7746Vrms for Dolby S506 S501 0dB 30dB Amp Amp Filter module "A" WTG DIN Audio 1kHz BPF CCIR Audio SG Distortion Analyzer 10k 0dBv R1* AC Voltmeter Oscilloscope DC Voltmeter GND 100k R100* 1.2k R101* 1.2k GND 100 100 R3 R4 10k 10k 0dB R10 R9 10k 47k 0dBv 0dBV 0dBv R11* 138.5k 47k 0dBv R12* 47k 0dBv R2* R5* R6* R7* 47k 0dBv R7* 138.5k 0dBm S1 S2 S4 S3 GND •VEE S5B •GND •G ND •AC IN •V EE R31* R26* R30* R29* R25* •AC MEAS •AC IN R19* •DC MEAS R14* R16* R24* R15* R32* R27* R23* R13* 5.1k •AC MEAS C10 -10dBV -30dBm 0.1µ -21dBV 0.1µ -30dBm 0.1µ -10dBV 10k CXA1797Q •DC MEAS 10k 10k R28 5.1k 5.1k R21*20k 5.1k R20* 5.1k 27k 5.1k 10k 5.1k 5.1k 10k S6 C1 R22* 5.1k R18* 5.1k S5A R17* 2.7k 5.1k 5.1k 2.7k S8 S9 S12 S16 0.1µ 0.1µ 0.1µ -21dBV C5 C4 C9 -21dBV 62 56 63 DOLBY PBIN1 54 59 52 64 VOLUME IN1 61 PB IN B1 60 PB IN A1 58 GND 57 PB IREF 55 PBIN B2 53 PBIN A2 PB OUT1 PB OUT2 S15 C12 0.1µ C14 0.1µ C16 -25dBm S23 R36 2.7k R40 2.7k *R44 10k *R48 C18 0.1µ C20 C22 0.068µ -6dBm C26 R54 C24 S28B 0.01µ S30 0.01µ 10k S19B S21 50k Ω R34 100 S18 R38 100 R42 10k *R46 DOLBY PBIN2 DOLBY IREF VOLUME IN2 S15 51 1 2 3 4 5 6 7 8 9 10 12 13 BUFFER OUT2 REC IN2 0.1µ S25 48 47 46 0.1µ C28 0.1µ S37 DOLBY TCH2 75.6k 0dBm R50 10k R52 10k R56 DOLBY TCH2 LINE OUT2 2.7k R60 2.7k S33B 45 44 43 42 -23dBv 0.1µ C34 DOLBY OUT2 S32 100 R58 S35 10k R62 DOLBY S IN2 C32 0.1µ R70 2.7k *R76 S388 100 0dBm R72 100 R74 10k *R78 REC EQ IN2 BOOST2 5.1k *R80 C36 5.1k S45B S47 R88 S49 11k 11k R90 0.68µ C38 R82 -4dBv 0.1µ 2.7k 32k 0dBv R84 100 R86 10k 40 39 REC EQ OUT2 BIAS2 METAL R89 R91 R79 38 BIAS2 CrO2 BIAS2 NOMAL 11k R92 11k 37 15 56k R94 56k S51 36 BIAS2 OUT R96 3.3k C40 S52B S54 R98 17 18 19 RECMUTE TC 4.7µ C42 S56 10k R100 S TC 4.7µ C44 10k S58 R102 10k S60 R104 10k 33 3.3µ METER OUT2 DVCC VCC BALANCE REC LEVEL RQC CAL XRESET DATA CLK GH CAL FQ CAL LATCH DGND 20 A VEE DC Ammeter 24 27 28 29 21 GND 30 32 23 CLK 22 LOAD 25 26 31 DATA GND A 5V VCC Power Supply A DC Ammeter DC Ammeter Application Circuit GND LINE OUT L-ch GND R23 R21 R25 4.7k C27 4.7µ GND 7.5k -6dBV 100k R19 2k ON/OFF R44 GND VEE 3.9k 0.68µ R15 3.3k C16 MPX Filter R33 R35 GND GND R37 Dolby S-NR R31 -14dBv 6.2k VEE VEE 600 2.2k 130k GND GND GND GND GND 22k R17 10k GND 220 HP Amp R46 HAEDPHONES 10k 220 R45 0.068µ 4.7µ C32 4.7µ C34 3.3µ C4 4.7µ to METER IC VCC C37 100µ DVCC DOLBY OUT2 BIAS2 CrO 2 VOLUME OUT2 2.2µ DOLBY TCH2 C18 DOLBY S IN2 BIAS2 OUT BUFFER OUT2 0.1µ DOLBY TCL2 C20 LINE OUT2 1µ REC EQ OUT2 BIAS2 NORMAL RECMUTE C30 TC S TC REC IN2 2.2µ 8.2k REC EQ IN2 C26 2.2µ METER AC2 C28 R2 10k R4 180k 51 32 GND VCC C36 DVCC C38 0.68µ 100µ C39 C2 220p L2 10mH LINE IN GND 10k 2.2µ 53 31 30 REC/PB GND 29 55 B-L 2.2µ 56 28 PBEQ C8 57 VEE 58 26 59 25 VEE 60 61 23 B-R PBEQ C6 24 62 GND R5 63 GND GND 390p 5.6mH C1 2.2µ VOLUME 21 BIAS OSC IN1 REC/PB L3 10k 22k DOLBY PBIN1 4.7k C12 22 220p L1 10mH 64 LINE IN R3 180k 1 4 DOLBY TCL1 REC C23 OUT1 DOLBY S IN1 2 5 6 7 8 9 10 11 12 DOLBY TCH1 3 13 14 15 16 17 NR TC 18 B/C TC 19 100µ C34 0.68µ VEE R1 10k GND GND C3 4.7µ BUFFER OUT1 VOLUME OUT1 REC IN1 BIASI NORMAL BIAS1 CrO2 BIASI OUT DOLBY OUT1 C17 0.1µ C19 BIAS1 METAL 1µ 0.068µ LINE OUT1 8.2k 2.2µ C25 REC EQ IN1 2.2µ C27 METER AC1 REC EQ OUT1 R32 R34 R36 C15 3.3k R14 R26 R27 C29 4.7µ C31 4.7µ C33 2k 6.2k R18 3.9k GND 22k -14dBv -26dBv 22k C21 ON/OFF GND 7.5k 4.7k -6dBV R20 R24 R22 100k 4.7µ VEE GND GND GND GND GND LINE OUT R-ch GND CXA1797Q 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. 0.68µ 3.3µ R16 VEE VEE Dolby S-NR GND R30 Fillter MPX 2.2µ 600 2.2k 130k METER OUT1 to METER IC GND 22k 2.2µ 20 —20— GND 2.2µ 20k DATA PB IN A1 PB IN B1 CLK 2.2µ R6 R7 PB OUT1 LATCH M icro Processr XRESET VEE C35 R4 C11 DGND A-R PBEQ C7 R8 DOLBY IREF DGND 50k CXA1797Q R38 REC LEVEL 50k 27k R39 A-L 2.2µ 27 R9 REQ IREF BALANCE 50k R40 PB IN A2 GH CAL 50k R41 PBEQ C8 PB IN B2 FQ CAL 50k 22k 4.7k 54 OSC BIAS R42 5.6mH 390p R10 REC CAL 0.68µ R12 R11 PB OUT2 DVCC DGND GND GND 22k 2.2µ C13 C9 L4 DOLBY PBIN2 52 R13 C14 VOLUME IN2 50 49 48 47 46 45 44 REC OUT2 C24 R28 R29 22k 43 42 41 40 BIAS2 METAL 39 38 37 36 35 34 METER OUT2 GND GND 33 R43 HP Amp CXA1797Q Description of Operation 1. Logic Usage The CXA1797Q is controlled by 11-bit serial data. Name SPEED METAL EQ A/B METER PB/REC LMUTE RMUTE BC/S B/C NR ON/OFF Function (DATA 1) (Note 2) NORM METAL OFF 120µs DECK A METER GAIN NORM PB MODE LINE MUTE ON REC MUTE ON DOLBY NR B or C DOLBY NR B DOLBY NR OFF Function (DATA 0) HIGH METAL ON 70µs DECK B METER GAIN HIGH (+12dB) REC MODE LINE MUTE OFF REC MUTE OFF DOLBY NR S DOLBY NR C DOLBY NR ON D1 D2 D3 D4 D5 D6 D7 D8 D9 (Note 1) D10 D11 Note 1) S mode takes precedence over other noise reduction modes. (When turning noise reduction off, select BC mode.) Note 2) All data is initialized to "1" when a reset is executed. 2. Serial Data Format An overview of the serial data format is shown below. When using CLK and LATCH as normal high: CLK DATA LATCH XRST D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 DATA is read at the rising edge of CLK. LATCH low : hold LATCH high : load Reset operation when low (when reset is required) When using CLK and LATCH as normal low (Note 3): CLK DATA LATCH XRST D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 DATA is read at the rising edge of CLK. LATCH low : hold LATCH high : load Reset operation when low (when reset is required) Note 3) In this instance, have the LATCH signal rise while CLK is high. —21— CXA1797Q 3. Timing Chart of 11-bit Serial Data Interface tWC 3.5V CLK 1.5V tWC tSDK 3.5V DATA 1.5V D1 tHCD tWD D2 tSLD LATCH 1.5V 3.5V CLK tHCL DATA D10 D11 tHLC 3.5V LATCH 1.5V XRESET 1.5V tWR —22— CXA1797Q 4. Control pin usage 1) REC VOL Connect a 50 kΩ variable resistor to this pin; this pin controls the electronic volume according to the voltage (between DVCC and DGND) applied to this pin. (Although other resistances and voltages can be used, the gain when the volume is at the center will differ.) 2) REC BAL This pin controls the electronic volume balance. (Both channel sounds are output when voltage of (DVCC + DGND)/2 is applied to this pin or when it is open. When DVCC voltage is applied, only the CH1 sound is output, and when DGND voltage is applied, only the CH2 sound is output.) 3) REC CAL This pin adjusts the overall gain for the recording equalizer amplifier. (The gain is at the center when voltage of (DVCC + DGND)/2 is applied to this pin or when it is open.) 4) FQ CAL This pin adjusts the high-frequency peak Q value for the recording equalizer amplifier. (FP and GP also change.) (The value is at the center when voltage of (DVCC + DGND)/2 is applied to this pin or when it is open.) 5) GH CAL This pin adjusts the middle/high frequency gain for the recording equalizer amplifier. (The gain is at the center when voltage of (DVCC + DGND)/2 is applied to this pin or when it is open.) GP/FP Low-frequency boost (external) Gain (dB) RECCAL GH FQ Frequency (Hz) —23— CXA1797Q 5. NR TC, BC TC, STC, RMUTE TC These time constants are set in order to prevent the generation of a popping noise when one of the switches operates. In addition, these functions can be controlled directly by applying voltage from an external source. (In this case, the capability to drive 17 kΩ impedance is required.) 17kΩ 6. Meter circuit The CXA1797Q meter circuit is a logarithmic detector. The circuit has a sensitivity of 65 mV/dB and is designed to generate 2.8 V when the reference signal is input. This circuit has the temperature characteristics depend on Vt (= KT/q). As a result, in order to satisfy the specifications, sufficient warmup time is required. If METER GAIN is set to HIGH mode, the sensitivity is increased by 12 dB. The METER AC pin is used to detect only the AC component, the low-frequency cut-off is determined by the 8.5 kΩ internal resistance and the capacitance connected to this pin. (With approximately 20 kHz at 1 µF, the high-frequency cut-off is fixed at 20 kHz.) 7. Bias circuit This circuit generates the DC voltage that controls the bias oscillator. The BIASOUT voltage is specified so that voltage equal to the internal reference voltage (VEE + 1.25 V) is generated at a pin selected according to the tape mode (BIAS N, BIAS C, or BIAS M). The BIASOUT pin is provided with a protective resistor of 147 Ω. Take into account the corresponding voltage drop when the load current is high. 147Ω NORM VEE METAL CrO2 VEE —24— CXA1797Q REC EQ frequency response 30 Vcc, VEE = ±5.5V 0dB = NORM Tape—NORM SPEED 315Hz, —24dBV NORM—NORM CrO 2—NORM METAL—NORM NORM—HIGH CrO 2—HIGH METAL—HIGH 20 Output response (dB) 10 0 –10 10 100 1k Frequency (Hz) 10k 100k REC EQ total harmonic distortion 10.0 VCC, VEE = ±5.5V NORM Tape—NORM SPEED 0dB = —4dBV, RL = 2.7k 315Hz 1kHz 3kHz 6.3kHz 10kHz 15kHz REC EQ load characteristics 14.0 12.0 10.0 VCC, VEE = ±5.5V NORM Tape—NORM SPEED 0dB = —4dBV THD+N = 1% f=315Hz f=1kHz Output level (dB) Distortion (%) 1.0 8.0 6.0 4.0 2.0 0.1 0 100 –12 –8 –4 0 4 8 12 500 1k 5k 10k Load resistance (Ω) 50k 100k Output level (dB) —25— CXA1797Q REC CAL frequency response 30 VCC, VEE = ±5.5V NORM Tape—NORM SPEED FQ CAL and GH CAL: open 0dB = 315Hz, —24dBV 20 Output response (dB) 10 REC CAL = 5.0V REC CAL = 2.5V 0 REC CAL = 0V –10 10 100 1k Frequency (Hz) 10k 100k GH CAL frequency response 30 VCC, VEE = ±5.5V NORM Tape—NORM SPEED REC CAL and FQ CAL: open 0dB = 315Hz, —24dBV 20 Output response (dB) 10 GH = 5.0V 0 GH = 2.5V GH = 0V –10 10 100 1k Frequency (Hz) 10k 100k FQ CAL frequency response 30 VCC, VEE = ±5.5V NORM Tape—NORM SPEED REC CAL and GH CAL: open 0dB = 315Hz, —24dBV 20 Output response (dB) 10 FQ CAL = 5.0V 0 FQ CAL = 0V FQ CAL = 2.5V –10 10 100 1k Frequency (Hz) 10k 100k —26— CXA1797Q Output level vs. REC CAL voltage VCC, VEE = ±5.5V NORM Tape—NORM SPEED GH CAL, FQ CAL = 2.5V 0dB = REC CAL, FQ CAL, GH CAL: open —20dB (at 315Hz, —4dBv) 315Hz 3kHz 8kHz 12kHz 6.0 4.0 Output level (dB) 2.0 0 –2.0 –4.0 –6.0 1.0 2.0 4.0 0 3.0 5.0 REC CAL pin voltage (V) Output level vs. GH CAL voltage VCC, VEE =±5.5V NORM Tape—NORM SPEED REC CAL, FQ CAL = 2.5V 0dB = REC CAL, FQ CAL, GH CAL: open —20dB (at 315Hz, —4dBv) 4.0 315Hz 3kHz 8kHz 12kHz Output level (dB) 2.0 0 –2.0 –4.0 0 1.0 2.0 3.0 4.0 5.0 GH CAL pin voltage (V) Output level vs. FQ CAL voltage 8.0 VCC, VEE =±5.5V NORM Tape—NORM SPEED REC CAL, GH CAL = 2.5V 0dB = REC CAL, FQ CAL, GH CAL: open —20dB (at 315Hz, —4dBv) 315Hz 3kHz 8kHz 12kHz 6.0 4.0 Output level (dB) 2.0 0 –2.0 –4.0 –8.0 0 1.0 2.0 3.0 4.0 5.0 FQ CAL pin voltage (V) —27— CXA1797Q REC VOL gain vs. Control voltage 10 0 –10 –20 REC VOL total harmonic distortion VCC, VEE = ±5.5V REC LEVEL: 2.0V 0dB = –10dBV f = 1kHz 1.0 REC VOL gain (dB) –30 –40 –50 –60 –70 –80 VCC, VEE = ±5.5V NORM Tape— NORM SPEED Input: 1kHz, –10dBv Distortion (%) 0.1 0.01 –8 0 1.0 2.0 3.0 4.0 5.0 –4 0 4 8 12 Output level (dB) REC LEVEL control voltage (V) REC balance characteristics 10 0 –10 –20 REC balance gain (dB) –30 –40 –50 –60 –70 –80 –90 –100 VCC, VEE = ±5.5V NORM Tape—NORM SPEED REC CAL, FQ CAL, GH CAL = 2.5V 0dB = REC LEVEL = 5.0V BALANCE = 2.5V Output for –10dBv input 0 1.0 2.0 3.0 4.0 5.0 1ch 2ch REC balance control voltage (V) —28— CXA1797Q NR B type encoding characteristics 12 VCC, VEE = ±5.5V 0dB = Dolby Level –40dB 20 NR C type encoding characteristics 10 VCC, VEE =± 5.5V 0dB = Dolby Level –60dB 8 16 –50dB –40dB –30dB Encoding boost (dB) 6 Encoding boost (dB) –30dB 12 4 –20dB 2 –10dB 0 0dB 8 4 –20dB 0 –10dB 0dB 100 200 500 1k 2k 5k 10k –2 100 500 1k Frequency (Hz) 5k 10k –4 Frequency (Hz) NR off total harmonic distortion 2.0 1.0 0.5 VCC, VEE = ±5.5V Encode Mode 0dB = Dolby Level 2.0 NR B type total harmonic distortion VCC, VEE = ±5.5V Encode Mode 0dB = Dolby Level 1.0 0.5 Distortion (%) 0.1 0.05 f = 1kHz 0.02 0.01 f = 100Hz f = 10kHz Distortion (%) 0.2 0.2 0.1 f=100Hz 0.05 f=1kHz f=10kHz 0.02 0.01 0 4 8 12 Output level (dB) 16 18 –4 –4 0 4 8 12 Output level (dB) 16 18 —29— CXA1797Q NR C type total harmonic distortion 2.0 1.0 0.5 f = 100Hz VCC, VEE = ±5.5V Encode Mode 0dB = Dolby Level NR ripple rejection ratio 1 VCC Rejection on Split Supply VCC, VEE =± 5.5V NR off encoding mode NR off decoding mode NR B encoding mode NR B decoding mode NR C encoding mode $ NR C decoding mode 0 Ripple elimination ratio (dB) –10 Distortion (%) 0.2 0.1 0.05 f = 1kHz –20 $ –30 $ –40 $ $ $ $$ $ $ $ $$ 0.02 0.01 –50 –60 –4 0 4 8 12 16 100 200 500 1k 2k 5k 10k Frequency (Hz) Output level (dB) NR ripple rejection ratio 2 VEE Rejection on Split Supply VCC, VEE = ±5.5V NR off encoding mode 0 NR off decoding mode NR B encoding mode NR B decoding mode NR C encoding mode –10 NR C decoding mode $ –20 $$ $ Ripple rejection ratio (dB) –30 $ –40 $ $ $ $ $ $ –50 –60 100 200 500 1k 2k 5k 10k Frequency (Hz) —30— CXA1797Q Package Outline Unit : mm 64PIN QFP(PLASTIC) 23.9 ± 0.4 + 0.4 20.0 – 0.1 51 33 + 0.1 0.15 – 0.05 0.15 52 32 17.9 ± 0.4 + 0.4 14.0 – 0.1 64 20 + 0.2 0.1 – 0.05 1 1.0 + 0.15 0.4 – 0.1 19 + 0.35 2.75 – 0.15 ± 0.12 M PACKAGE STRUCTURE PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE QFP–64P–L01 ∗ QFP064–P–1420 LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT EPOXY RESIN SOLDER/PALLADIUM PLATING COPPER /42 ALLOY 1.5g —31— 0.8 ± 0.2 16.3