NJM2774 New Japan Radio Co.,Ltd, NJM2774 Datasheet
NJM2774
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NJM2774 Summary of contents
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... Further, another audio line amplifier (Amplifier 3) corresponds both single-end input and differential input. Also, it includes 3-circuit voltage detector and mute transistor control circuit. The NJM2774 is suitable for audio applications with a headphone and audio line outputs FEATURE "Headphone Amplifier "2-channel Audio Line Amplifier " ...
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... NJM2774 !PIN CONFIGURATION 32 1 No. Symbol + Power Supply Power Supply 2 3 REG IN External Reference Voltage Input “3.3V” 4 REG OUT External Reference Voltage Output “3.3V” 5 GND1 GND1 6 HP-L IN Lch Headphone Amplifier Input 7 HP-R IN Rch Headphone Amplifier Input 8 REF Reference Voltage “ ...
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... NO2 BPF:400Hz to 30kHz Vin=1.6V(DC), Vin=0.2Vrms, f=1kHz, THD 2A BPF:400Hz-30kHz, R =10k =11.4V, Vin=1.65V(DC), Vo=3.0Vrms, THD 2B f=1kHz, BPF:400Hz to 30kHz, R Rg=2.2k , Vin=1.6V(DC), Vo=1Vrms, CS2 f=1kHz, BPF:400Hz to 30kHz LPF -3dB 2 R IN2 NJM2774 RATING +23 + 1200 -40∼+85 -40∼+150 MIN. TYP. 11 ...
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... NJM2774 ! ! ! ! ELECTRICAL CHARACTERISTICS (V PARAMETER AMPLIFIER 3”LINE AMPLIFIER” (V Input DC Voltage 3 Output DC Voltage 3 Voltage Gain 3 Maximum Output Voltage3 Output Noise 3 Total Harmonic Distortion 3A Total Harmonic Distortion 3B Channel Separation 3 Common Mode Rejection Ratio Input Impedance 3 CONTROL DC CHARACTERISTICS Detection Voltage 1 V Release Voltage DET1 ...
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... Lch Headphone Amplifier Input 7 HP-R IN Rch Headphone Amplifier Input 9 LINE LINE-R IN Ver.1.0 FUNCTION Power Supply 1 Power Supply 2 “3.3V” “3.3V” Lch Line Amplifier1 Input Rch Line Amplifier1 Input NJM2774 EQUIVALENT CIRCUIT 12k GND + 200 GND + ...
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... NJM2774 ! ! ! ! TERMINAL DESCRIPTION PIN NO. SYMBOL 12 REC-L IN+ Lch Line Amplifier2 “REC (+)” Input 13 REC-R IN+ Rch Line Amplifier2 “REC (+)” Input 11 REC-L IN- Lch Line Amplifier2 “REC (-)” Input 14 REC-R IN- Rch Line Amplifier2 “REC (-)” Input 8 REF Logic Input A for Mute Control of 15 X_MUTEA IN ...
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... LINE-L OUT Lch Line Amplifier1 “REC” Output 26 HP-R OUT Rch Headphone Amplifier Output 27 HP-L OUT Lch Headphone Amplifier Output Ver.1.0 FUNCTION Amplifier Output Amplifier Output Amplifier Output GND 39.2k 60.2k NJM2774 EQUIVALENT CIRCUIT +1 V 10k 10k GND + GND 48k 17k to 11pin, 14pin ...
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... NJM2774 ! ! ! ! TERMINAL DESCRIPTION PIN NO. SYMBOL 28 SPR(-) IN Rch Speaker Amplifier “-“ Input 29 SPR(+) IN Rch Speaker Amplifier “+“ Input 30 SPL(-) IN Lch Speaker Amplifier “-“ Input 31 SPL(+) IN Lch Speaker Amplifier “+“ Input External Reference Voltage Input 32 ZERO IN – 8 – FUNCTION ...
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... Bias Control +1 V REF1 Amplifier Gain=+9dB (V : 5.84V) ODC3 REF1 3.3V ±5% 3.3V ±5% 3.3V ± because supply voltage for high power circuit block. NJM2774 32 ZERO Output Output Headphone Output 100 F 100 27 100 F 100 to Headphone Output ...
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... NJM2774 ! ! ! ! APPLICATION CIRCUIT =13 to 18V =9V 2 3.3V 3 3.3V REGOUT 4 5 HP-L+ 6 PWM HP-L- 3.01V HP-R+ 0.09V 7 Center : 1.60V HP-R- 8 LINE-L+ 9 PWM LINE-L- 3.01V LINE-R+ 0.09V 10 Center :1.60V LINE-R- REC-L- 11 COMMON REC-L+ 12 1.0Vrms REC-R+ 13 REC-R- 14 COMMON X_MUTEA IN 15 3.3V X_MUTEB Note) Use 9V-supply voltage ...
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... REF1 ODC2 10 ZERO IN Bias Control + REF1 12 Amplifier Gain=+9dB 13 REF1 14 3.3V ±5% 10k 15 3.3V ±5% 10k 16 3.3V ±5% 10k NJM2774 32 ZERO DET3 DET3 28 100 F AMP1 Output 27 100 100 F AMP1 Output 26 100 V =3.3V pullup R =10k pullup 25 V OMUTE 2.2 F AMP2 Output ...