BA7726AS Rohm, BA7726AS Datasheet
BA7726AS
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BA7726AS Summary of contents
Page 1
... KARAOKE BA7726AS / BA7726AFS The BA7726AS and BA7726AFS are analog companders for karaoke echo systems and have internal logarithmic compression and expansion circuits, a stereo line mixer amplifier, vocal fader function, vocal detection function, microphone ALC, microphone ON / OFF switch, and output switch. When used together with the BU9252 8-bit digital delay, these ICs form a high-grade karaoke echo system with minimum components. • ...
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... Multimedia ICs • Block diagram VOCAL DET OUTSW ALC – VOCAL FADER BA7726AS / BA7726AFS – COMPRESS + VR VR EXPAND – ...
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... Note: Pin type EF: emitter follower, P-P: push-pull, B: base For pins marked with an asterisk ( ), refer to Input and output equivalent circuit. All figures are designed values based on the measurement circuit in Fig. 1 (where Vcc = 9.0V), and are not guaranteed standards. Function , recovery R = 85.6k BA7726AS / BA7726AFS Voltage Pin type 4. 2.5V — ...
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... CTRL V CC 39k 39k 3.3V 3 ECHO LEVEL CTRL 85k 39k 15k CTRL V CC 39k 31 All figures are designed values, and are not guaranteed standards. 4 BA7726AS / BA7726AFS MUTE CTRL V CC 1.7V 39k 4 150k LOOP GAIN CTRL 12 39k 0 0 CTRL V CC 49.5k 3.3V 33k 2 ...
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... ODL – 4.4 – 2.4 — dBV — – 29 — dB ODC = OPEN OPEN) LSTR LVFR = V ) LOOP DIN AUDIO BA7726AS / BA7726AFS Conditions No input V = – 20.0dBV – 20.0dBV IN % MIC OFF ( ECHO CC 1 THD = input MIC OFF ( ECHO ...
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... LSTR – 2.2 — 2.8 LSTR – 4.5 — 5.0 LSTR – GND — 0.5 LVFR – 2.2 — 2.8 LVFR – 4.5 — 5.0 LVFR – GND — 0.1 ECHO – 0.2 V — V ECHO – BA7726AS / BA7726AFS Unit Conditions ...
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... ALC DET OUTSW 0 2.2 2.2 0.1 4700p 4700p 1k 10k 10k 5600p 3900p 100 1k 0. – COMPRESS VOCAL VR FADER SW VR EXPAND 0.015 0.1 0.068 1k Fig. 1 BA7726AS / BA7726AFS 1 39k 18k + 3900p 220p 1 + 47k 18k 18k 5600p – – 0.47 10k CMP BF OUT DLY ...
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... Fig. 2 LINE OUTattenuation ratio vs. Vecho (11pin) (4) LOOP GAIN CTRL (pin 12) H • Adjusts the loop gain (pins 17 and 18). RIGHT 0 – 25 – RIGHT Fig. 3 CMP BF OUT attenuation ratio vs. Vloop BA7726AS / BA7726AFS Vcc: Controls echo signal V (11pin) ECHO ~ 0 GND CC CC MIC OFF ...
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... Vcc and the ground). ALC level is calculated with the following equation, although slight error occurs OUTSW OAML 1 0.1 F 0.068 F 0.047 F BA7726AS / BA7726AFS – Fig. 4 LPF C C ...
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... LOOP GAIN 2.7k ECHO LEVEL Fig.8 BA7726AS / BA7726AFS Set within this range – 9. MIC AMP 1kHz) – Pin 29 voltage: V29 (V) pin 29 voltage These are figures for standard samples and are not guaranteed standards. 1000p 8bit and ...
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... Refer to items 7 and 8 in “Circuit description.” When 4700p these functions are not used, be sure to ground pins 27 and 28 (the ALC function) and pins 29 and 30 (microphone amplifier input detection function). BA7726AFS 10. 0.1 BA7726AS / BA7726AFS 13.6 0 0.8 0.36 0.1 0.3Min. ...