Multimedia ICs Video signal switcher BA7611AN / BA7611AF The BA7611AN and BA7611AF are a three-channel analog multiplexers with built-in mute and a 6dB amplifier. The ICs designed for use in video cassette recorders. It features a large dynamic range and wide operating frequency range, and have sync-tip clamp inputs whitch are ideal for switching video signals. Applications •Video cassette recorders and televisions •1)Features 3-input / 1-output switches. 2) 3) 4) 5) 6) Low power consumption (50mW Typ.). 7) Excellent frequency characteristics (10MHz, 0dB Typ.). 8) Wide dynamic range (3.5VP-P Typ.). 9) Low interchannel crosstalk ( – 65dB Typ., f = 4.43MHz). Built-in 6dB amplifier. Built-in mute. Sync-tip clamp inputs. Wide operating supply voltage range (4.5V to 13.0V). •Block diagram BA7611AN BA7611AF IN1 MUTE 1 8 VOUT MUTE 6dB Amp CTLA 2 CTLB 3 LOGIC 5 6 7 GND IN3 VCC 4 LOGIC 7 VCC 6 IN3 5 GND 8 VOUT 4 IN2 IN1 3 CTLB 2 CTLA IN2 1 6dB •Truth table CTL - A CTL - B OUT L (OPEN) L (OPEN) IN1 L (OPEN) H IN2 H L (OPEN) IN3 H H MUTE 1 Multimedia ICs BA7611AN / BA7611AF •Absolute maximum ratings (Ta = 25°C) Parameter Symbol Limits Unit Power supply voltage VCC 13.5 V Power dissipation Pd 900∗1 (SIP8) / 550∗2 (SOP8) mW Operating temperature Topr – 25 ~ + 75 °C Storage temperature Tstg – 55 ~ + 125 °C ∗1 Reduced by 9mW for each increase in Ta of 1°C over 25°C. ∗2 Reduced by 5.5mW for each increase in Ta of 1°C over 25°C. •Equivalent circuits CLAMP INPUT OUTPUT Vcc Vcc 100Ω IN OUT 1.2µA 100µA 2mA CTLa / CTLb Vcc 20kΩ 100Ω 50kΩ CTLa / b 34kΩ Note: Input bias current 1µA [Typ.] Output impedance 20Ω [Typ.] 2 Multimedia ICs BA7611AN / BA7611AF •Electrical characteristics (unless otherwise noted, Ta = 25°C and V Parameter Symbol Min. Operating voltage VCC Supply current ICC Maximum output level Voltage gain Interchannel crosstalk Frequency characteristic Typ. Max. 4.5 — — 10.5 Vom 3.0 GV 5.5 CT — Cf CC = 5V) Unit Conditions Measurement Circuit 13.0 V — Fig.4 15.5 mA — Fig.4 3.5 — VP-P f = 1kHz, THD = 0.5% Fig.4 6.0 6.5 dB f = 1MHz, VIN = 1.0VP-P Fig.4 – 65 — dB f = 4.43MHz, VIN = 1.0VP-P Fig.4 f = 10MHz / 1MHz, VIN = 1.0VP-P 0 1.0 dB CTL pin switch level A VTH-A – 3.0 1.0 2.0 3.0 V — Fig.4 Fig.4 CTL pin switch level B VTH-B 1.0 2.0 3.0 V — Fig.4 䊊Not designed for radiation resistance. •Electrical characteristic curves 10 VCC = 9V 7 6 5 VCC 4 = 5V 3 0 CROSSTALK: CT (dB) 8 6 VOLTAGE GAIN: Cf (dB) OUTPUT VOLTAGE: VOUT (VP-P) 20 VCC = 12V 9 4 2 0 2 – 40 – 60 –2 1 0 0 – 20 1 2 3 4 5 100k 6 300k 1M 3M 10M 30M – 80 100k 100M 300k 1M 3M 10M 30M 100M INPUT VOLTAGE: VIN (VP-P) FREQUENCY: f (Hz) FREQUENCY: f (Hz) Fig. 1 VIN vs. VOUT (f = 1kHz) Fig. 2 Frequency characteristics Fig. 3 Interchannel crosstalk •Measurement circuit MUTE 6dB Amp Logic 1 2 3 V P P 4 5 6 7 8 VCC + SW1 1 SW3 SW2 2 1 1µF OSC OSC 1µF 1 50Ω SW4 SW5 2 31 2 3 VCC VCC 0.022µF 2 1µF 1µF OSC 50Ω 1 2 47µF A 1µF 50Ω 1µF Fig. 4 3 Multimedia ICs BA7611AN / BA7611AF •Measurement conditions Parameter Current dissipation Switch settings SW1 SW2 SW3 SW4 SW5 Measurement method ICC 2 2 2 2 2 Ammeter Symbol Maximum output level IN1 IN2 IN3 Vom Vom Vom 1 2 2 2 1 2 2 2 1 3 3 2 3 2 3 f = 1kHz, THD = 0.5% ∗1 Voltage gain IN1 IN2 IN3 GV GV GV 1 2 2 2 1 2 2 2 1 3 3 2 3 2 3 f = 1MHz, V = 1VP-P ∗2 Interchannel crosstalk IN1→IN2 IN1→IN3 IN1→MUTE IN2→IN3 IN2→MUTE IN3→MUTE CT CT CT CT CT CT 1 1 1 2 2 2 2 2 2 1 1 2 2 2 2 2 2 1 3 2 2 2 2 2 2 3 2 3 2 2 f = 4.43MHz V = 1VP-P Frequency characteristic IN1 IN2 IN3 Gf Gf Gf 1 2 2 2 1 2 2 2 1 3 3 2 3 2 3 CTL pin switching level CTLa CTLb VTH VTH 2 2 2 1 1 2 1 3 3 1 ∗3 f = 10MHz f = 1MHz V = 1VP-P ∗4 ∗5 ∗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). ∗2: Input a 1VP-P, 1MHz sine wave. The voltage gain is given by GV = 20 log (VOUT / VIN). ∗3: Input a 1VP-P, 4.43MHz sine wave. The interchannel crosstalk is given by CT = 20 log (VOUT / VIN). ∗4: Input 1VP-P, 1MHz and 10MHz sine waves. The frequency characteristic is given by Gf = 20 log (VOUT (f = 10MHz) / VOUT (f = 1MHz)). ∗5: 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 20mVP-P. •External dimensions (Units: mm) BA7611AN BA7611AF 0.8 4 4.4 ± 0.2 6.2 ± 0.3 1 0.3 ± 0.1 0.11 1.3 5 1.27 0.15 ± 0.1 0.6 8 1.5 ± 0.1 5.8 ± 0.2 1.2 2.54 5.0 ± 0.2 2.8 ± 0.2 8 1 3.5 ± 0.5 10.5 ± 0.5 19.3 ± 0.2 0.4 ± 0.1 0.3Min. 0.15 SIP8 4 SOP8