NTE869
Integrated Circuit
Dual, High Speed, Programmable
Current Mode (Norton) Amp
Description:
The NTE869 consists of two current differencing (Norton) input amplifiers. Emphasis has been
placed on obtaining high frequency performance and providing user programmable amplifier operat-
ing characteristics. Each amplifier is broadbanded to provide a high gain bandwidth product, fast slew
rate and stable operation for an Inverting closed loop gain of 10 or greater. Pins for additional external
frequency compensation are provided. The amplifiers are designed to operate from a single supply
and can accommodate input commonmode voltages greater than the supply.
Applications:
D
General Purpose Video Amplifiers
D
High Frequency, High Q Active Filters
D
PhotoDiode Amplifiers
D
Wide Frequency Range Waveform Generation Circuits
D
AC Applications Work to much Higher Frequencies
Features:
D
User programmable gain bandwidth product, slew rate, input bias current, output stage biasing
current and total device power dissipation.
D
High gain bandwidth product (I
SET
= 0.5mA)
400MH
Z
for A
V
= 10 to 100
30MH
Z
for A
V
= 1
D
Current differencing inputs allow high commonmode input voltages
D
Operates from a single 5V to 22V supply
D
Large inverting amplifier output swing, 2mV to V
CC
2V
D
Low spot noise, 6nV/
Hz, for f
>
1kH
Z
Absolute Maximum Ratings:
Supply Voltage
22V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply Voltage
11V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation, P
D
750mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Currents, I
IN
(+) or I
IN
()
10mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set Currents, I
SET(IN)
or I
SET(OUT)
2mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Junction Temperature, T
J
+125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
0
to 70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistance, JunctiontoAmbient, R
thJA
160
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature (During Soldering, 10sec), T
L
+300
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (I
SET(IN)
= I
SET(OUT)
= 0.5mA, V
supply
= 12V, T
A
= +25
C unless
otherwise noted.)
Parameter
Test Conditions
Min
Typ
Max
Unit
Open Loop Voltage Gain
V
supply
= 12V, R
L
= 1k, f = 100Hz
T
A
= 125
C
62
72
68
dB
Bandwidth Unity Gain
R
IN
= 1k
, C
comp
= 10pF
15
30
MH
Z
Gain Bandwidth Product Gain
of 10 to 100
R
IN
50
to 200
200
400
MH
Z
Slew Rate
Unity Gain
Gain of 10 to 100
R
IN
= 1k
, C
comp
= 10pF
R
IN
<
200
30
60
V/
s
Amplifier to Amplifier Coupling
f = 100H
Z
to 100kH
Z
, R
L
= 1k
80
dB
Mirror Gain (Note 1)
@ 2mA I
IN
(+), I
SET
= 5
A, T
A
= 25
C
@ 0.2mA I
IN
(+), I
SET
=5
A Over Temp
@ 20
A I
IN(+),
I
SET
= 5
A Over Temp
0.9
0.9
0.9
1.0
1.0
1.0
1.1
1.1
1.1
A/
A
Mirror Gain (Note 1)
@ 20
A to 0.2mA I
IN
(+) Over Temp, I
SET
= 5
A
3
5
%
Input Bias Current
Inverting Input, T
A
= 25
C Over Temp
8
15
A
Input Resistance (
re)
Inverting Input
2.5
k
Output Resistance
I
OUT
= 15mA rms, f = 1MHz
3.5
Output Voltage Swing
V
OUT
High
V
OUT
Low
R
L
= 600
I
IN
() & I
IN
(+) Grounded
I
IN
() = 100
A, I
IN
(+) = 0
9.5
10.3
2.0
50
V
mV
Output Currents
Source
Sink (Linear Region)
Sink (Overdriven)
I
IN
() & I
IN
(+) Grounded, R
L
= 100
V
comp
=0.5V = V
OUT
= 1V, I
IN
(+) = 0
I
IN
() = 100
A, I
IN
(+) = 0, V
OUT
Force = 1V
16
1.5
40
4.7
3.0
mA
Supply Current
NonInverting Input Grounded, R
L
=
18.5
22
mA
Power Supply Rejection
f = 120H
Z
, I
IN
(+) Grounded
40
50
dB
Note 1. Mirror gain is the current gain of the current mirror which is used as the noninverting input.
A
I
=
I
IN
()
I
IN
(+)
Mirror
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