NTE1780 Integrated Circuit 2 Channel Tone/DC Volume/Balance Control Circuit Description: The NTE1780 is an integrated circuit in a 12–Lead SIP type package designed for 2–channel volume and tone control circuits. Features: D Easier Compact Set Design D Functions Are: 2–Channel Bass, Treble Control Circuit D Balance Control Circuit D DC Volume Control Circuit (Volume Control w/Physiological Characteristics) D All Functions Enable DC Controllable Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.4V Circuit Voltage, V1, 4, 5, 6–7, V8, 9, 11, 12–7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0, V2–7 Supply Current, I2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64mA Circuit Current, I3, I10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40mA Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 920mW Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C Electrical Characteristics: (TA = +25C, VCC = 12V unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit VCC = 12V 24 38 50 mA Circuit Current Itot Circuit Voltage V3, 10–7 Vi = No Signal, V12 = VCC, V1 = V5 = V8 = VCC/2 8.0 8.4 8.8 V VOmax f = 1kHz, Vi = 400mVrms, V12 = VCC, V1 = V5 = V8 = VCC/2 190 230 270 mVrms – +0.2 ±1.0 0.40 0.60 0.90 V – 25 50 µVrms –32 –45 – dB Volume Circuit Maximum Output Channel Balance (Note 1) CB Volume Starting Voltage V(st) f = 1kHz, Vi = 400mVrms, V12 = VR, V1 = V5 = V8 = VCC/2, Note 2 Residual Tone Level (Volume Minimum) Vmin. f = 1kHz, Vi = 400mVrms, V12 = 0, V1 = V5 = V8 = VCC/2 AttBR f = 1kHz, Vi = 400mVrms, V12 = VCC, V5 = V8 = VCC/2, VOR1: V1 = (5.5/12), VCC(VR–1), VOR2: V1 = 0V, Note 3 Balance Control Circuit Attenuation (R–ch) Note 1. Deviation between R and L–ch for maximum output. Note 2. V12 voltage when output voltage is 0.1mVrms. Note 3. AttBR: VOR2/VOR1 Electrical Characteristics (Cont’d): (TA = +25C, VCC = 12V unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit –32 –45 – dB 10 12 dB Balance Control Circuit (Cont’d) Attenuation (L–ch) AttBL f = 1kHz, Vi = 400mVrms, V12 = VCC, V5 = V8 = VCC/2, VOR1: V1 = (6.5/12), VCC(VR–1), VOR2: V1 = 0V, Note 4 Tone Control Circuit Low Frequency Boost Control V40/V1k V1k: f = 1kHz, Vi = 400mVrms Output voltage when V12 = VCC, V1 = V5 = V8 = VCC/2 V40: f = 40Hz, Vi = 400mVrms Output voltage when V12 = VCC, V5 = V8 = VCC 8 Low Frequency Cut Control V40/V1k V1k: f = 1kHz, Vi = 400mVrms Output voltage when V12 = VCC, V1 = V5 = V8 = VCC/2 V40: f = 40Hz, Vi = 400mVrms Output voltage when V12 = VCC, V5 = V8 = VCC –7.5 –12.0 –16.0 dB High Frequency Boost Control V15/V1k V1k: f = 1kHz, Vi = 400mVrms Output voltage when V12 = VCC, V1 = V5 = V8 = VCC/2 V15: f = 15kHz, Vi = 400mVrms Output voltage when V12 = VCC, V5 = V8 = VCC 7.5 10.0 13.0 dB High Frequency Cut Control V40/V1k V1k: f = 1kHz, Vi = 400mVrms Output voltage when V12 = VCC, V1 = V5 = V8 = VCC/2 V15: f = 15kHz, Vi = 400mVrms Output voltage when V12 = VCC, V5 = V8 = VCC –7.5 –12.0 –18.0 dB –65 –80 – dB Crosstalk CT f = 1kHz, Vi = 400mVrms, V1q2 = VCC, V1 = V5 = V8 = VCC/2 Output Noise Voltage Vno Vi = No Signal, V12 = VCC, V1 = V5 = V8 = VCC/2 – 80 120 µVrms Distortion Rate THD f = 1kHz, Vi = 400mVrms, V12 = VCC, V1 = V5 = V8 = VCC/2 – 0.2 0.5 % 8.2 11.0 13.5 kΩ 11.0 16.0 22.0 kΩ 60 110 160 Ω Input Resistance Ri (6), (9) f = 1kHz Ri (4), (11) Output Resistance Ro (3), (10) f = 1kHz Note 4. AttBL: VOL2/VOL1 Pin Connection Diagram (Front View) 12 Volume Control 11 Lt Ch Low Freq Input 10 9 8 7 6 5 4 3 2 1 Lt Ch Output Lt Ch Input Treble Control GND Rt Ch Input Bass Control Rt Ch Low Freq Input Rt Ch Output VCC Balance Control .150 (3.81) 1.157 (29.4) .311 (7.9) 1 12 .184 (4.7) .100 (2.54) Typ 1.100 (27.9)