NTE NTE799

NTE799
Integrated Circuit
Four Channel “SQ” Decoder
Description:
The NTE799 consists of two high input impedance preamplifiers which are fed with left total, LT, and
right total, RT signals. The preamplifiers each feed two all–phase networks which generate two LT
signals in quadrature and two RT signals in quadrature. The four signals are matrixed to yield left front,
left back, right front, and right back signals (LF, LB, RF, RB).
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Power Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25V
Power Dissipation (TA = +25°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750mW
Derate Above +25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.7mW/°C
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +75°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Electrical Characteristics: (VCC = +20V, Vin = 0.5V(RMS) @ 1kHz, TA = +25°C unless otherwise
specified)
Parameter
Min
Typ
Max
Unit
Supply Current Drain
11
16
21
mA
Input Impedance
1.8
3.0
–
mΩ
–
5.0
–
kΩ
Channel Balance (LF/RF)
–1.0
0
+1.0
dB
Voltage Gain LF/LT or RF/RT
–1.0
0
+1.0
dB
Relative Voltage Gain LB’/LF’ or RF/RT
–1.0
0
+1.0
dB
Maximum Input Voltage for 1% THD at Output RT or LT
2.0
–
–
V(RMS)
Total Harmonic Distortion RT or LT
–
0.1
–
%
Signal to Noise Ratio (Short–Circuit Input VO = 0.5V(RMS) with Output Noise
Referenced to Output Voltage, VO) (BW = 20Hz to 20kHz)
–
80
–
dB
Output Impedance
Pin Connection Diagram
Phase Shift Network
1
14 RB Output
LF Output
2
13 Phase Shift Network
LB Output
3
12 VCC
Phase Shift Network
4
11 RF Output
Phase Shift Network
5
10 Phase Shift Network
Lt Channel Input
6
9
Phase Shift Network
GND
7
8
Rt Channel Input
14
8
1
7
.785 (19.95) Max
.300 (7.62)
.200 (5.08)
Max
.100 (2.45)
.600 (15.24)
.099 (2.5) Min