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| Multimedia ICs Video signal switcher for AV amplifiers BA7625 The BA7625 is a video signal switch that contains two five-channel analog multiplexers and wide-band 6dB amplifiers.It designed for use in video cassette recorders. By simply adding transistor buffers to the outputs,it is possible to construct arecord / playback switch for two record / playback VCRs, and three video playback machines (eg.laser disk players). Input switching and VCR record switching can be done independently. The BA7625 has sync-tip clamp inputs which are ideal for switching video signals. *Applicationsand video selectors AV amplifiers *Features/ 3-output switches. 1) 5-input 2) Sync-tip clamp inputs. 3) Built-in 6dB amplifiers. 4) 5V supply voltage. *Absolute maximum ratings (Ta = 25C) Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits 9 500 - 25 ~ + 70 - 55 ~ + 125 Unit V mW C C Reduced by 5mW for each increase in Ta of 1C over 25C. 1 Multimedia ICs BA7625 *Block diagram Monitor OUT GND IN5 GND IN4 CTL E IN3 CTL D 1 2 3 4 5 6 7 logic 6dB logic 16 15 14 13 12 11 10 9 IN1 CTL A VOUT1 VCC IN2 CTL B VOUT 2 CTL C 6dB 8 *Truth table A L H L H H B L L H H H E Monitor OUT IN1 IN2 IN3 IN4 IN5 C L H L H H D L L H H H E VOUT1 -- IN2 IN3 IN4 IN5 C L H L H H D L L H H H E VOUT2 IN1 -- IN3 IN4 IN5 L H L H L H Note 1: indicates "don't care" (H or L). 2 Multimedia ICs BA7625 *Equivalent input / output circuits Input circuit Waveform IN1 ~ IN5 Vcc R1 R2 200 Q1 IN 200 1VP-P Q2 Q3 + V DC 2.0V V1 2.7V I1 100A CTLA ~ CTLE IN Vcc R1 2k R2 R3 58k O1 Q1 R4 38k 58k Q2 Vcc = 5.0V High level 3.3V Low level 2.1V Monitor OUT Vcc Q1 R1 R2 17k 100 Q4 MONOUT Q2 Q3 Q5 1.4mA DC 0.5V 2VP-P VOUT1 , VOUT2 Vcc I1 R1 Q1 R2 100 Q3 O1 DN I2 600A 1.4mA Q2 Q4 DC 0.5V VOUT 2VP-P 25BUR 48k VOUT1 3 Multimedia ICs BA7625 *Electrical characteristics (unless otherwise noted, Ta = 25C and VCC = 5V) Parameter Operating voltage Supply current Maximum output level Voltage gain Interchannel crosstalk Mute level Frequency characteristic CTL pin switch level Not designed for radiation resistance. Symbol VCC ICC Vom GV CT CTM Gf VTH Min. 4.5 -- 2.6 5.7 -- -- -3 2.2 Typ. 5.0 15.0 2.9 6.2 - 65 - 35 0 -- Max. 5.5 20.0 -- 6.7 - 45 - 25 3 3.3 Unit V mA VP-P dB dB dB dB V Conditions -- -- f = 1kHz, THD = 0.5% f = MHz, VIN = 1VP-P f = 4.43MHz, VIN = 1VP-P f = 4.43MHz, VIN = 1VP-P 10MHz / 1MHz, VIN = 1VP-P -- *Measurement circuit VCC VCC 75 V 105 1 SW1 103 4.7 V VCC A 16 15 14 13 12 11 10 9 12 3 SWC VOUT1 V VOUT2 V 23 12 SWA 3 1 SW2 V 75 V 105 23 12 SWB VCC 3 105 105 V logic 6dB logic 6dB SWD 12 1 MONITOR OUT V SW5 SW4 SW3 2 3 4 5 6 7 8 V 3 VCC 105 105 1 2 3 105 1 2 3 105 1 2 3 105 105 12 V SWE 3 75 V 75 V 75 V VCC Fig.1 4 Multimedia ICs BA7625 *Measurement conditions Parameter Current dissipation Monitor OUT maximum output level Symbol ICC Vom 1MON Vom 2MON Vom 3MON Vom 4MON Vom 5MON GV 1MON GV 2MON GV 3MON GV 4MON GV 5MON CT1-2MON CT1-3MON CT1-4MON CT1-5MON CT2-1MON CT2-3MON CT2-4MON CT2-5MON Monitor OUT interchannel crosstalk CT3-1MON CT3-2MON CT3-4MON CT3-5MON CT4-1MON CT4-2MON CT4-3MON CT4-5MON CT5-1MON CT5-2MON CT5-3MON CT5-4MON Monitor OUT frequency characteristic Gf 1MON Gf 2MON Gf 3MON Gf 4MON Gf 5MON Vom 2OUT1 Vom 3OUT1 Vom 4OUT1 Vom 5OUT1 Switch settings SW1 3 2 3 2 3 2 3 3 3 3 2 3 3 SW2 3 3 2 3 3 2 3 3 2 3 3 3 3 2 3 2 3 SW3 3 3 2 3 3 2 3 3 3 2 3 3 3 2 3 3 2 3 SW4 3 3 2 3 3 2 3 3 3 3 2 3 3 2 3 3 2 3 SW5 3 3 2 3 2 3 3 3 3 2 3 2 3 3 2 SWA 2 3 2 3 2 2 3 2 3 2 2 2 3 2 2 3 3 2 2 3 2 2 2 3 2 2 2 3 2 2 2 3 2 3 2 2 SWB 2 3 3 2 2 2 3 3 2 2 2 3 2 2 2 3 2 2 2 3 3 2 2 3 3 2 2 3 3 2 2 3 3 2 2 2 SWC 2 SWD 2 SWE 2 Measurement method -- 2 3 2 2 3 2 2 2 3 2 3 2 3 2 3 2 3 2 3 2 3 2 3 2 Note 1 Note 2 Monitor OUT voltage gain Note 3 Note 4 VOUT1 maximum output level Note 1 5 Multimedia ICs Parameter Symbol GV 2OUT1 GV 3OUT1 GV 4OUT1 GV 5OUT1 CT1-2OUT1 CT1-3OUT1 CT1-4OUT1 CT1-5OUT1 CT2-1OUT1 CT2-3OUT1 CT2-4OUT1 CT2-5OUT1 VOUT1 interchannel crosstalk CT3-1OUT1 CT3-2OUT1 CT3-4OUT1 CT3-5OUT1 CT4-1OUT1 CT4-2OUT1 CT4-3OUT1 CT4-5OUT1 CT5-1OUT1 CT5-2OUT1 CT5-3OUT1 CT5-4OUT1 VOUT1 frequency characteristic VOUT2 maximum output level Gf 2OUT1 Gf 3OUT1 Gf 4OUT1 Gf 5OUT1 Vom 1OUT2 Vom 3OUT2 Vom 4OUT2 Vom 5OUT2 GV 1OUT2 GV 3OUT2 GV 4OUT2 GV 5OUT2 Switch settings SW1 3 2 3 3 3 3 3 2 3 2 3 SW2 2 3 3 2 3 3 3 2 3 3 2 3 3 2 3 SW3 3 2 3 3 3 2 3 3 3 2 3 3 3 SW4 3 2 3 3 3 3 2 3 3 2 3 3 2 3 3 2 3 SW5 3 3 2 3 3 3 3 2 3 2 3 2 3 2 SWA SWB SWC 2 3 2 2 3 3 2 2 3 3 2 2 3 2 2 2 3 2 3 2 3 2 3 2 2 3 2 2 3 3 2 2 3 3 2 2 SWD 3 2 2 2 3 2 2 2 3 2 2 2 3 3 2 2 3 3 2 2 3 3 2 2 3 2 2 2 3 2 2 2 3 2 2 2 BA7625 Measurement method Note 2 SWE VOUT1 voltage gain 3 2 3 2 3 2 3 2 Note 3 2 3 3 2 3 2 3 2 Note 4 Note 1 VOUT2 voltage gain Note 2 6 Multimedia ICs Parameter Symbol CT1-2OUT2 CT1-3OUT2 CT1-4OUT2 CT1-5OUT2 CT2-1OUT2 CT2-3OUT2 CT2-4OUT2 CT2-5OUT2 VOUT2 interchannel crosstalk CT3-1OUT2 CT3-2OUT2 CT3-4OUT2 CT3-5OUT2 CT4-1OUT2 CT4-2OUT2 CT4-3OUT2 CT4-5OUT2 CT5-1OUT2 CT5-2OUT2 CT5-3OUT2 CT5-4OUT2 VOUT2 frequency characteristic Mute level Gf 1OUT1 Gf 3OUT1 Gf 4OUT1 Gf 5OUT1 CTM VOUT1 CTM VOUT2 VTH A VTH B VTH C VTH D VTH E Switch settings SW1 2 3 3 3 3 2 3 2 2 3 2 3 SW2 3 2 3 3 3 3 3 3 3 SW3 3 3 2 3 3 3 2 3 3 3 2 3 2 3 SW4 3 3 3 2 3 3 2 3 3 3 2 SW5 3 3 3 3 2 3 2 3 3 SWA SWB SWC 2 3 2 2 3 3 2 2 3 2 2 2 3 2 3 2 3 2 3 2 3 3 2 2 3 2 SWD 3 2 2 2 3 2 2 2 3 3 2 2 3 3 2 2 3 3 2 2 3 2 2 2 3 BA7625 Measurement method SWE 1 3 3 1 3 2 3 2 3 2 2 3 3 2 1 Note 3 Note 4 Note 5 1 3 3 1 CTL switching level 2 2 Note 6 Note 1: Connect a distortion meter to the output, and input a f = 1kHz sine wave. Adjust the input level until the output distortion is 0.5%. This output voltage at this time is the maximum output level Vom (VP-P). Note 2: Input a 1VP-P, 1MHz sine wave. The voltage gain (in dB) is given by GV = 20 log (VOUT / VIN). Note 3: Input a 1VP-P, 4.43MHz sine wave. The interchannel crosstalk (in dB) is given by CT = 20 log (VOUT / VIN) + 6. Note 4: Input 1VP-P, 1MHz and 10MHz sine waves. The frequency characteristic (in dB) is given by Gf = 20 log (VOUT (f = 10MHz) / VOUT (f = 1MHz) ). Note 5: Input a 1VP-P, 4.43MHz sine wave. The mute level is given by CTM = 20 log (VOUT / VIN) + 6 (dB). Note 6: Input a 1VP-P, 1MHz sine wave. Reduce the CTL pin voltage from VCC. The CTL pin switching level (VTH) is the CTL pin voltage at which the VOUT level drops below 10mVP-P. 7 Multimedia ICs BA7625 *Application example VCC 100 470 TV 75 + 2.2 1 MONOUT IN1 16 VCC 2 FRONT AUX 75 4 REAR BS 75 6 2.2 LD 75 8 CTL D CTL C 9 7 IN3 VOUT2 10 + + OUT 75 VTR IN1 GND CTL A 15 100 2.2 3 IN5 VOUT1 14 A933 GND VCC 13 0.01 5 IN4 IN2 12 VCC 100 470 + + + 470 75 + 5.0V + 2.2 + 47 2.2 OUT 75 VTR IN2 CTL E CTL B 11 75 F/R CTL REC CTL MON CTL Fig.2 *External dimensions (Units: mm) 19.4 0.3 16 9 6.5 0.3 0.51Min. 1 8 7.62 3.2 0.2 4.25 0.3 0.3 0.1 2.54 0.5 0.1 0 ~ 15 DIP16 8 + |
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