727

NTE727
Integrated Circuit
Four Independent AC Amplifiers
Description:
The NTE727 is a silicon monolithic integrated circuit in a 16–Lead DIP type package consisting of four
independent identical AC amplifiers which can operate from a single–ended power supply.
The amplifiers include internal DC bias and feedback to provide temperature–stabilized operation.
They may be used in a wide variety of AC applications in which operational amplifiers have previously
been used.
Each high gain amplifier has a high impedance non–inverting input, and a lower impedance inverting
input for the application of feedback. Two power–supply terminals and two ground terminals are provided to reduce internal and external coupling between amplifiers.
Features:
D Four AC Amplifiers on a Common Substrate
D Independently Accessible Inputs and Outputs
D Operates from a Single–Ended Supply
D Noise Figure (Each Amp): 2dB Typ @ 1kHz
D High Voltage Gain (Each Amp): 53dB Min
D High Input Resistance (Each Amp): 90kΩ Typ
D Undistorted Output Voltage (Each Amp): 2Vrms Min
D Output Impedance (Each Amp): 1kΩ Typ
D Open–Loop Bandwidth (Each Amp): 300kHz Typ
Applications:
D Multi–Channel or Cascade Operation
D Low–Level Preamplifiers
D Equalizers
D Linear Signal Mixers
D Tone Generators
D Multivibrators
D AC Intergrators
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Power Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +16V
AC Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5Vrms
Power Dissipation (TA = +55°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750mW
Derate Above 55°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.7mW/°C
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +85°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Electrical Characteristics: (TA = +25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Static (VCC = 12V)
Current Drain Per Amplifier Pair
I12 or I15
9.5
13.5
17.5
mA
DC Voltage at Output Terminals
V1, V6,
V11, V16
6.1
6.9
8.1
V
DC Voltage at Feedback Terminals
V3, V7,
V10, V14
1.7
2.0
2.3
V
DC Voltage at Input Terminals
V4, V8,
V9, V13
2.2
2.5
2.8
V
Dynamic (Characteristics given are for each amplifier with no AC feedback)
Open–Loop Gain
Output Voltage Swing
AOL
VCC = 12V, EIN = 2mV, f = 10kHz
53
58
–
dB
VO(rms)
VCC = 12V, f = 1kHz, THD = 5%
2.0
2.4
–
V
250
300
0
kHz
Open–Loop –3dB Bandwidth
BW
VCC = 12V, EIN = 2mV
Total Harmonic Distortion
THD
VCC = 12V, f = 1kHz, EOUT = 2Vrms
–
0.65
–
%
Input Resistance
RIN
Open Loop, f = 1kHz, Note 1
–
90
–
kΩ
Input Capacitance
CIN
f = 1MHz
–
9
–
pF
Output Resistance
ROUT
Note 1
–
1
–
kΩ
Output Capacitance
COUT
f = 1MHz
–
18
–
pF
Feedback Capacitance (Output to
Non–Inverting Input
CFB
VCC = 12V, f = 1MHz
–
<0.1
–
pF
Broad–Band Output Noise Voltage
EN
VCC = 12V, RS = 10kΩ, A = 40dB,
Equivalent Noise BW = 50kHz
–
0.3
1.0
mV
–
0.5
2.2
mV
f = 10Hz
–
10.0
–
dB
f = 100Hz
–
5.8
–
dB
f = 1kHz
–
2.0
–
dB
f = 10kHz
–
1.1
–
dB
f = 100kHz
–
0.6
–
dB
Output Noise Voltage “Weighted”
Noise Figure
EN(WT)
NF
RS = 5kΩ
Inter–Amplifier Audio Separation
“Crosstalk”
CT
VCC = 12V, f = 1kHz, 0dB = 0.78V
–
<–45
–
dB
Inter–Amplifier Capacitance
(Any amplifier output to any other
amplifier input)
C
VCC = 12V, f = 1MHz
–
<0.02
–
pF
Note 1. Pin3, Pin7, Pin10, and Pin14 are bypassed to GND.
Pin Connection Diagram
Output Amp 1 1
16 Output Amp 4
15 (+) VCC 1
GND 1 2
–Input Amp 1 3
14 –Input Amp 4
+Input Amp 1 4
13 _Input Amp 4
12 (+) VCC 2
GND 2 5
Output Amp 2 6
11 Output Amp 3
–Input Amp 2 7
10 –Input Amp 3
+Input Amp 2 8
9 +Input Amp 3
16
9
.260 (6.6) Max
1
8
.785 (19.9) Max
.300 (7.62)
.200 (5.08)
Max
.245
(6.22)
Min
.100 (2.54)
.700 (17.7)
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