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BA8400FV Datasheet(PDF) 2 Page - Rohm |
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BA8400FV Datasheet(HTML) 2 Page - Rohm |
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2 / 9 page  2 Video ICs BA8400FV •Pin descriptions Pin No. Pin name Function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 CTL OUT (CTL pulse output) RECHPB (record / play switch) RECIN (REC CTL pulse input) GND CTL + (CTL head “+” input) CTL – (CTL head “–” input) RECPBGND BIAS (bias) IN – (playback amplifier input) MONIOUT (playback amplifier output) AGC (AGC time constant) HysBIAS (hysteresis amplifier center level) FILTER (high-frequency noise filter) VCC CTL pulse output. High output level approx. VCC – 0.05V, IO = + 0.5mA Low output level approx. 0.05V, IO = – 0.5mA Switch input pin for the record / playback amplifiers. High input: REC mode Low input: PB mode Threshold voltage: approx. 1 / 2VCC CTL pulse input pin for recording. Threshold voltage: approx. 1 / 2VCC Power, REC / PB SW, CTL output buffer ground pin. Ground pin for the REC and playback amplifiers. Feedback input pin for the playback amplifier. Playback amplifier output monitor pin. Output dynamic range is the DC level ± Vf. Set the time constant after considering the transient response of the playback mode switching. AGC detect level VdetAGC = 0.47VCC [V] (approx.) Playback amplifier output amplitude VAGC = 2 × (VdetAGC – HysVcent) [VP-P] Connection pin for the bypass capacitor for the hysteresis amplifier center level. Connect a decoupling capacitor close to the pin. Pin for connection of high-frequency noise filter for AGC amplifier output for playback CTL pulse. Also, input pin for the hysteresis amplifier. Hysteresis amplifier center voltage HysVcent = 0.27Vcc [V] approx. High-side hysteresis width ∆HysVH = 0.367VCC – HysVcent [V] Low-side hysteresis width ∆HysVL = 0.173VCC – HysVcent [V] Bias pin for the playback amplifier. Bias voltage: VIB8 = 0.15VCC + 1.3V (approx.) When recording: CTL head positive-side recording current. When playing: input pin for the playback CTL pulse. When recording: CTL head negative-side recording current. When playing: bias pin for the playback CTL pulse input. •Absolute maximum ratings (Ta = 25°C) Parameter Symbol Limits Unit Power supply voltage Power dissipation Operating temperature Storage temperature VCC Pd Topr Tstg 8.0 450∗ – 25 ~ + 75 – 55 ~ + 125 V mW °C °C ∗ Reduced by 4.5mW for each increase in Ta of 1 °C over 25°C. •Recommended operating conditions (Ta = 25°C) Parameter Symbol Limits Unit Applied voltage VCC 2.7 ~ 3.5 V Not designed for radiation resistance. |
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