BH7273KV

Video ICs Equalizer and ATF circuit IC for Digital VCRs BH7273KV The BH7273KV is an equalizer and ATF circuit IC developed for use with digital video cassettes (DVC). By using this IC, it is simple to design the filter for the equalizer required for DVD sets. In addition, the ATF circuit detects the pilot signals and generates error signals. •Applications ATFs for digital VCRs Equalizers and •Features the configuring of all pass filters, 1 + D cir1) Enables cuits, and transversal filters (TVF). 2) Built-in VCA, amplifier, buffer, and mixer amplifier. 3) Detects the ATF pilot signal and generates an ATF error signal. 4) Built-in 1.5MHz LPF, VCA, 465kHz BPF, 697.5kHz BPF, 25dB amplifier, peak detector, and subtractor. 5) Intermediate frequencies are variable by controlling the voltages for the 465kHz BPF and 697.5kHz BPF. •Absolute maximum ratings (Ta = 25°C) Parameter Applied voltage Power dissipation Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits 7.0 ∗ 1000 Unit V mW °C °C – 20 ~ + 65 – 55 ~ + 125 ∗ When mounted on a 70mm × 70mm × 1.6mm glass epoxy board. ∗ Reduced by 10.0mW for each increase in Ta of 1°C over 25°C. •Recommended operating conditions (Ta = 25°C) Parameter Power supply voltage Symbol VCC 5V Min. 4.6 Typ. 4.9 Max. 5.2 Unit V Conditions 2, 15, 21, 33, 44, 48, 60pin Not designed for radiation resistance. 1 Video ICs BH7273KV •Block diagram OFFSET BIAS OUT SUBSTRACT OUT OFFSET BIAS F2 DET OUT F1 DET OUT MIX + OUT MIX – OUT Vcc 4.9V Vcc 4.9V 48 N.C. 49 DET DET 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 Mix 31 47k 47k N.C. N.C. Vcc 4.9V MIX IN2 MIX IN1 GND GND GND N.C. SUBTRACT F1 AMP OUT 50 F2 AMP OUT 51 30 N.C. F2 AMP IN 52 AMP AMP 25dB 29 N.C. F1 AMP IN 53 28 BF OUT2 F1 BPF OUT 54 BF BF 27 BF OUT1 F2 BPF OUT 55 26 BF IN F2 adj 56 697.5kHz BPF 25 GND BH7273KV F1 adj 57 465.0kHz BPF 24 TVF2AMP OUT GCA OUT 58 AMP 23 TVF2AMP – IN GND 59 22 TVF2AMP + IN Vcc 4.9V 60 21 Vcc 4.9V GAIN adj 61 VCA 14 / 24dB 20 GND GAIN SW 62 VCA AMP AMP 19 TVF1AMP OUT ATF IN 63 1.5MHz LPF 18 TVF1AMP – IN GND 64 CTRL 1 SLEEP CTRL 2 Vcc 4.9V 3 BIAS FILTER 4 BF2 IN 5 BF2 OUT 6 APF1AMP + IN 7 APF1AMP – IN 8 APF1AMP OUT 9 DRIVER IN 10 DRIVER OUT 11 GND 12 TVF1VCA + IN 13 TVF1CTRL 14 TVF1VCA OUT 15 Vcc 4.9V 16 GND 17 TVF1AMP + IN •Vcc-GND pin table Pin No. 2 11 15 16 21 20 25 33 34 44 39 48 47 60 59 64 Pin name VCC 4.9V GND VCC 4.9V GND VCC 4.9V GND GND VCC 4.9V GND VCC 4.9V GND VCC 4.9V GND VCC 4.9V GND GND All pass filter for pins 3 to 10 Same as above 12-14pin VCA, 17-19pin AMP Same as above 22-24pin AMP, 26-28pin BUFF 22-24pin AMP 26-28pin BUFF 35-38pin MIX AMP 35-38pin MIX AMP Detector, subtractor circuit Same as above BPF, 25dBAMP Same as above LPF, GCA Same as above N.C. (Connected to GND to lower impedance) Function ∗ Make sure that Vcc and GND do not sway. ∗ Separate the equalizer and ATF grounds. ∗ Since the gain of the ATF circuit is high, make sure that there is no return from the output to input. 2 Video ICs BH7273KV CC •Electrical characteristics (unless otherwise noted, Ta = 25°C, V Parameter Quiescent current Quiescent current [Equalizer block] 〈All pass filter〉 Voltage gain Frequency characteristics 〈VCA〉 Voltage gain Voltage gain Frequency characteristics 〈TVF AMP〉 Voltage gain Frequency characteristics 〈BUFF AMP〉 Voltage gain Frequency characteristics 〈MIX AMP〉 Voltage gain Frequency characteristics [ATF block] VCA voltage gain 1 VCA voltage gain 2 465.0kHz BPF voltage gain 697.5kHz BPF voltage gain ATF OUT output level 1 ATF OUT output level 2 ATF OUT output level 3 [Logic block] SLEEP hold voltage SLEEP hold voltage VCA gain switch low VCA gain switch high VTH1H VTH1L VTH62L VTH62H 2.0 0.0 0.0 2.0 — — — — 4.9 1.0 1.0 4.9 GVF1 GVF2 GVB1 GVB2 VATF1 VATF2 VATF3 11 21 44 44 1.30 1.50 0.60 14 24 48 48 1.50 1.80 0.90 17 27 52 52 1.70 2.10 1.20 GVM ∆GVM 5.0 – 3.0 8.0 0.0 11.0 — GVB ∆GVB – 4.2 – 3.0 – 1.2 ± 0.0 — — GVT ∆GVT 3.9 – 3.0 6.9 ± 0.0 9.9 — GVV1 GVV2 ∆GVV – 1.0 — – 3.0 2.0 – 28.0 ± 0.0 — – 12.0 — GVA ∆GVA – 3.0 – 3.0 ± 0.0 ± 0.0 + 3.0 — Symbol Iq Iq(S) Min. — — Typ. 63 16 Max. 100 30 = 4.9V, f = 4.0MHz) Conditions No signal No signal, sleep mode Unit mA mA dB dB Input at pin 4 = 300mVP-P Measure output at pin 10 f = 8.0 / 1.0MHz, VIN = 300mVP-P Output level difference for pin 10 dB dB dB Input at pin 12 = 150mVP-P, pin 13 = 3.0V Measure output at pin 14 Input at pin 12 = 150mVP-P, pin 13 = 0.25V Measure output at pin 14 f = 8.0 / 1.0MHz, VIN = 150mVP-P Output level difference for pin 14; pin 13 = 3.0V dB dB Input at pins 17, 18, 22, and 23 = 150mVP-P Measure output at pins 19 and 24 f = 8.0 / 1.0MHz, VIN = 150mVP-P Output level difference for pins 19 and 24 dB dB Input at pin 26 = 300mVP-P Measure output at pins 27 and 28 f = 8.0 / 1.0MHz, VIN = 300mVP-P Output level difference for pins 27 and 28 dB dB Input at pins 35 and 36 = 150mVP-P Measure output at pins 37 and 38 f = 8.0 / 1.0MHz, VIN = 150mVP-P Output level difference for pins 37 and 38 dB dB dB dB V V V Input at pin 63 = 2.0mVP-P, pin 62 = low Measure output at pin 58, f = 697.5kHz Input at pin 63 = 2.0mVP-P, pin 62 = high Measure output at pin 58, f = 697.5kHz Input at pin 63 = 0.3mVP-P, pin 62 = high Measure output at pin 50, f = 465.0kHz Input at pin 63 = 0.3mVP-P, pin 62 = high Measure output at pin 51, f = 697.5kHz No signal 50pin = 100mVP-P 51pin = 300mVP-P, 41pin = 1.5V 50pin = 500mVP-P 51pin = 100mVP-P, 41pin = 1.5V V V V V Pin 1 voltage for SLEEP mode Pin 1 voltage for SLEEP mode Pin 62 voltage for ATF VCA gain to be low Pin 62 voltage for ATF VCA gain to be high 3 Video ICs BH7273KV Offset BIAS MIX OUT ATF OUT Vcc 4.9V MIX OUT •Measurement circuit Vcc 4.9V 1000p∗ 1000p∗ 2.2k 48 49 DET DET 465.0kHz BPF OUT 697.5kHz BPF OUT 47 46 45 44 43 42 MIX IN MIX IN Vcc 4.9V 0.1µ 0.1µ 0.1µ 41 40 39 38 37 36 0.1µ 35 34 33 32 MIX 31 47k 47k SUBTRACT 50 51 30 52 AMP AMP 25dB 29 300 28 0.1µ 300 BUFF OUT 0.1µ 0.1µ BUFF IN BUFF OUT 0.1µ 53 54 0.1µ f2 adj 56 f1 adj 57 465.0kHz BPF 697.5kHz BPF BF BF 27 55 26 25 BH7273KV 24 0.1µ 0.1µ 0.1µ Vcc 4.9V 600 TVF AMP OUT ATF VCA OUT 58 AMP 23 TVF AMP IN 59 Vcc 4.9V 60 Gain adj 61 Gain SW 62 ATF IN 63 0.1µ 64 CTRL 1 2 3 0.1µ SLEEP Vcc 4.9V 470 0.1µ APF IN 300 APF OUT 0.1µ VCA IN VCA OUT 47p 1k 33p 4 5 6 7 8 9 0.1µ 600 Vcc 4.9V 10 11 12 13 14 15 16 1.5MHz LPF AMP VCA AMP VCA 14 / 24dB 22 TVF AMP IN 21 20 TVF AMP OUT 19 0.1µ 0.1µ 0.1µ 600 TVF AMP IN TVF AMP IN 18 17 Fig. 1 4 Video ICs BH7273KV •Input / output circuits Pin No. Pin name Pin voltage 1 Internal circuit Function 15k 35k 1 SLEEP CTRL 0.0 100k 15k Sleep control 2 VCC 5V — — VCC for all pass filter of pins 3 to10 21k 3 BIAS FILTER 2.2 3 20k Filter for BF amplifier bias of pins 4 and 5 22k 4 5 BF2 IN BF2 OUT 3.0 2.2 4 5k 5 Buffer amplifier input Buffer amplifier output 6 7 APF1 AMP + IN APF1 AMP – IN — — 6 7 APF amplifier positive input APF amplifier negative input 150 8 APF1 AMP OUT — 8 APF amplifier output 9 10 DRIVER IN DRIVER OUT — — 9 10 Driver input Driver output 5 Video ICs BH7273KV Pin No. Pin name Pin voltage Internal circuit Function 11 GND — — GND for all pass filter of pins 3 to 10 12 12 TVF1 VCA + IN 2.2 1k 5k TVF1 VCA positive input 13 5k 15k 13 TVF1 CTRL 0.0 TVF1 VCA gain control 5k 400 400 14 TVF1 VCA OUT 1.7 14 TVF1 VCA positive output 15 VCC 5V — — VCC for VCA of pins 12 to 14 and for amplifier of pins 17 to 19 16 GND — — GND for VCA of pins 12 to 14 and for amplifier of pins 17 to 19 17 18 17 18 TVF1 AMP + IN TVF1 AMP – IN 2.2 2.2 400 5k 5k TVF1 amplifier positive input TVF1 amplifier negative input 6 Video ICs BH7273KV Pin No. Pin name Pin voltage Internal circuit Function 19 TVF1 AMP OUT 2.7 19 TVF1 amplifier output 20 GND — — GND for amplifier of pins 22 to 24 21 VCC 5V — — VCC for amplifier of pins 22 to 24 and for BF of pins 26 to 28 22 23 22 23 TVF2 AMP + IN TVF2 AMP – IN 2.2 2.2 400 5k 5k TVF2 amplifier positive input TVF2 amplifier negative input 24 TVF2 AMP OUT 2.7 24 TVF2 amplifier output 25 GND — — GND for BF of pins 26 to 28 26 27 28 BF IN BF OUT1 BF OUT2 2.1 1.3 1.3 26 5k 27 28 BF input BF output 1 BF output 2 7 Video ICs BH7273KV Pin No. Pin name Pin voltage Internal circuit Function 29 30 31 32 N.C. — — — 33 VCC 5V — — VCC for VCA of pins 30 to 32 and MIX amplifier of pins 35 to 38 34 GND — — GND for MIX amplifier of pins 35 to 38 35 36 MIX IN1 MIX IN2 2.2 2.2 35 36 5k 5k MIX amplifier input 1 MIX amplifier input 2 37 38 MIX – OUT MIX + OUT 3.2 3.2 37 — 38 MIX amplifier output 1 MIX amplifier output 2 39 GND — — GND for detector, subtractor, and reverse polarity circuits 40 N.C. — — — 8 Video ICs BH7273KV Pin No. Pin name Pin voltage Internal circuit Function 35k 14k 41 OFFSET BIAS 1.5 41 Bias adjustment 15k 4k 42 OFFSET BIAS OUT 2.5 42 Bias output 1k 43 SUBTRACT OUT — 43 ATF output 1k 44 VCC 5V — — VCC for detector, subtractor, and reverse polarity circuits 15k 15k 46 45 46 F1DET OUT F2DET OUT — — 45 F1 detector F2 detector 47k 47k 47 GND — — GND for BPF and 25dB amplifier 48 VCC 5V — — VCC for BPF and 25dB amplifier 9 Video ICs BH7273KV Pin No. Pin name Pin voltage Internal circuit Function 49 N.C. — — — 50 51 F1AMP – OUT F2AMP – OUT 2.1 2.1 50 51 F1 amplifier output F2 amplifier output 52 53 52 53 F2AMP IN F1AMP IN 2.3 2.3 200 5k 5k 200 F2 amplifier input F1 amplifier input 54 55 F1BPF OUT F2BPF OUT 2.5 2.5 54 55 F1 BPF output F2 BPF output 56 F2 ADJ 1.5 56 70k 35k F2 adjustment 30k 57 F1 ADJ 1.5 57 70k 35k F1 adjustment 30k 58 GCA OUT 1.8 58 VCA output 10 Video ICs BH7273KV Pin No. Pin name Pin voltage Internal circuit Function 59 GND — — GND for LPF and VCA 60 VCC 5V — — VCC for LPF and VCA 61 GAIN ADJ 1.5 70k 61 35k VCA gain adjustment 30k 1k 1k 62 15k 35k 62 GAIN SW 0.0 15k 100k VCA gain switching 63 63 LPF IN 3.8 5k LPF input 64 N.C. — — N.C. pin Connect to ground to lower impedance 11 Video ICs BH7273KV •Application example Delay Line 150 EQ + OUT Offset BIAS EQ – OUT 150 180 Vcc 4.9V 1000p∗ 1000p∗ ATF OUT Vcc 4.9V 150 0.1µ 0.1µ 0.1µ 48 49 DET DET 47 46 45 44 43 42 41 40 39 38 37 36 0.1µ 35 34 33 32 MIX 31 47k 47k Vcc 4.9V 2.2k SUBTRACT 50 51 30 52 AMP AMP 25dB 29 0.1µ 53 28 0.1µ 27 0.1µ BF BF 54 0.1µ f2 adj 56 f1 adj 57 465.0kHz BPF 697.5kHz BPF 55 26 0.1µ 25 BH7273KV 24 58 AMP 23 0.1µ 59 Vcc 4.9V 60 Gain adj 61 Gain SW 62 ATF IN 63 0.1µ 64 CTRL 1 2 3 0.1µ SLEEP Vcc 4.9V 470 0.1µ EQ IN 300 300 300 47p 1k 33p Vcc 4.9V Delay Line 4 5 6 7 8 9 10 11 12 13 14 15 16 1.5MHz LPF AMP VCA AMP VCA 14 / 24dB 22 Delay Line 300 0.1µ 21 Vcc 4.9V 20 0.1µ 19 300 18 0.1µ 17 0.1µ 0.1µ 0.1µ Fig. 2 12 Video ICs BH7273KV •External dimensions (Units: mm) 12.0 ± 0.3 10.0 ± 0.2 48 12.0 ± 0.3 10.0 ± 0.2 49 33 32 64 1 16 17 1.4 ± 0.1 0.125 ± 0.1 0.10 0.5 0.2 ± 0.1 0.1 VQFP64 0.5 13