NTE NTE1780

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)