NTE727
Integrated Circuit
Four Independent AC Amplifiers
Description:
The NTE727 is a silicon monolithic integrated circuit in a 16Lead DIP type package consisting of four
independent identical AC amplifiers which can operate from a singleended power supply.
The amplifiers include internal DC bias and feedback to provide temperaturestabilized 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 noninverting input, and a lower impedance inverting
input for the application of feedback. Two powersupply terminals and two ground terminals are pro-
vided 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 SingleEnded Supply
D
Noise Figure (Each Amp): 2dB Typ @ 1kHz
D
High Voltage Gain (Each Amp): 53dB Min
D
High Input Resistance (Each Amp): 90k
Typ
D
Undistorted Output Voltage (Each Amp): 2V
rms
Min
D
Output Impedance (Each Amp): 1k
Typ
D
OpenLoop Bandwidth (Each Amp): 300kHz Typ
Applications:
D
MultiChannel or Cascade Operation
D
LowLevel Preamplifiers
D
Equalizers
D
Linear Signal Mixers
D
Tone Generators
D
Multivibrators
D
AC Intergrators
Absolute Maximum Ratings: (T
A
= +25
C unless otherwise specified)
Power Supply Voltage
+16V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AC Input Voltage
0.5V
rms
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (T
A
= +55
C), P
D
750mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Derate Above 55
C
7.7mW/
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
40
to +85
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
65
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (T
A
= +25
C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Static (V
CC
= 12V)
Current Drain Per Amplifier Pair
I
12
or I
15
9.5
13.5
17.5
mA
DC Voltage at Output Terminals
V
1
, V
6
,
V
11
, V
16
6.1
6.9
8.1
V
DC Voltage at Feedback Terminals
V
3
, V
7
,
V
10
, V
14
1.7
2.0
2.3
V
DC Voltage at Input Terminals
V
4
, V
8
,
V
9
, V
13
2.2
2.5
2.8
V
Dynamic (Characteristics given are for each amplifier with no AC feedback)
OpenLoop Gain
A
OL
V
CC
= 12V, E
IN
= 2mV, f = 10kHz
53
58
dB
Output Voltage Swing
V
O
(rms)
V
CC
= 12V, f = 1kHz, THD = 5%
2.0
2.4
V
OpenLoop 3dB Bandwidth
BW
V
CC
= 12V, E
IN
= 2mV
250
300
0
kHz
Total Harmonic Distortion
THD
V
CC
= 12V, f = 1kHz, E
OUT
= 2V
rms
0.65
%
Input Resistance
R
IN
Open Loop, f = 1kHz, Note 1
90
k
Input Capacitance
C
IN
f = 1MHz
9
pF
Output Resistance
R
OUT
Note 1
1
k
Output Capacitance
C
OUT
f = 1MHz
18
pF
Feedback Capacitance (Output to
NonInverting Input
C
FB
V
CC
= 12V, f = 1MHz
<0.1
pF
BroadBand Output Noise Voltage
E
N
V
CC
= 12V, R
S
= 10k
, A = 40dB,
Equivalent Noise BW = 50kHz
0.3
1.0
mV
Output Noise Voltage "Weighted"
E
N(WT)
0.5
2.2
mV
Noise Figure
NF
R
S
= 5k
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
InterAmplifier Audio Separation
"Crosstalk"
CT
V
CC
= 12V, f = 1kHz, 0dB = 0.78V
<45
dB
InterAmplifier Capacitance
(Any amplifier output to any other
amplifier input)
C
V
CC
= 12V, f = 1MHz
<0.02
pF
Note 1. Pin3, Pin7, Pin10, and Pin14 are bypassed to GND.
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