LM2900, LM3900
QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
SLOS059 – JULY 1979 – REVISED SEPTEMBER 1990
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Wide Range of Supply Voltages, Single or
Dual Supplies
D
Wide Bandwidth
D
Large Output Voltage Swing
D
Output Short-Circuit Protection
D
Internal Frequency Compensation
D
Low Input Bias Current
D
Designed to Be Interchangeable With
National Semiconductor LM2900 and
LM3900, Respectively
description
These devices consist of four independent, highgain frequency-compensated Norton operational
amplifiers that were designed specifically to
operate from a single supply over a wide range of
voltages. Operation from split supplies is also
possible. The low supply current drain is
essentially independent of the magnitude of the
supply voltage. These devices provide wide bandwidth and large output voltage swing.
The LM2900 is characterized for operation from
–40°C to 85°C, and the LM3900 is characterized
for operation from 0°C to 70°C.
schematic (each amplifier)
Constant
Current
Generator
V
CC
200 µA
OUT
1.3 mA
IN +
IN –
Copyright 1990, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
+
–
IN+
IN–
OUT
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1IN+
2IN+
2IN–
2OUT
1OUT
1IN–
GND
V
CC
3IN+
4IN+
4IN–
4OUT
3OUT
3IN–
N PACKAGE
(TOP VIEW)
symbol (each amplifier)
LM2900, LM3900
QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
SLOS059 – JULY 1979 – REVISED SEPTEMBER 1990
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
LM2900 LM3900 UNIT
Supply voltage, VCC (see Note 1) 36 36 V
Input current 20 20 mA
Duration of output short circuit (one amplifier) to ground at (or below) 25°C free-air temperature
(see Note 2)
unlimited unlimited
Continuous total dissipation See Dissipation Rating Table
Operating free-air temperature range –40 to 85 0 to 70 °C
Storage temperature range –65 to 150 –65 to 150 °C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260 260 °C
NOTES: 1. All voltage values, except differential voltages, are with respect to the network ground terminal.
2. Short circuits from outputs to VCC can cause excessive heating and eventual destruction.
DISSIPATION RATING TABLE
PACKAGE
TA ≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE TA = 25°C
TA = 70°C
POWER RATING
TA = 85°C
POWER RATING
N 1150 mW 9.2 mW/°C 736 mW 598 mW
recommended operating conditions
LM2900 LM3900
MIN MAX MIN MAX
UNIT
Supply voltage, VCC (single supply) 4.5 32 4.5 32 V
Supply voltage, V
CC+
(dual supply) 2.2 16 2.2 16 V
Supply voltage, V
CC–
(dual supply) –2.2 –16 –2.2 –16 V
Input current (see Note 3) –1 –1 mA
Operating free-air temperature, T
A
–40 85 0 70 °C
NOTE 3: Clamp transistors are included that prevent the input voltages from swinging below ground more than approximately –0.3 V. The
negative input currents that may result from large signal overdrive with capacitive input coupling must be limited externally to values
of approximately – 1 mA. Negative input currents in excess of –4 mA causes the output voltage to drop to a low voltage. These
values apply for any one of the input terminals. If more than one of the input terminals are simultaneously driven negative, maximum
currents are reduced. Common-mode current biasing can be used to prevent negative input voltages.
LM2900, LM3900
QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
SLOS059 – JULY 1979 – REVISED SEPTEMBER 1990
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics, VCC = 15 V, TA = 25°C (unless otherwise noted)
LM2900 LM3900
PARAMETER
TEST CONDITIONS
†
MIN TYP MAX MIN TYP MAX
UNIT
p
p
TA = 25°C 30 200 30 200
IIBInput bias current (inverting input)
I
I+
=
0
TA = Full range 300 300
nA
Mirror gain
I
I
+
= 20 µA to
200 µA
0.9
1.1
0.9
1.1µA/µA
Change in mirror gain
T
A
=
Full range
,
See Note 4
2% 5% 2% 5%
V
= V–, T
= Full range,
Mirror current
I+ I
,
See Note 4
A
g,
10
50010500µA
A
VD
Large-signal differential
voltage amplification
VO = 10 V,
f = 100 Hz
RL = 10 kΩ,
1.2 2.8 1.2 2.8 V/mV
r
i
Input resistance (inverting input) 1 1 MΩ
r
o
Output resistance 8 8 kΩ
B
1
Unity-gain bandwidth (inverting
input)
2.5 2.5 MHz
k
SVR
Supply voltage rejection ratio
(
∆V
CC
/∆V
IO)
70 70 dB
RL = 2 kΩ 13.5 13.5
V
OH
High-level output voltage
I
I+
= 0,
II– = 0
VCC = 30 V,
No load
29.5 29.5
V
V
OL
Low-level output voltage
II+ = 0,
RL = 2 kΩ
II– = 10 µA,
0.09 0.2 0.09 0.2 V
I
OS
Short-circuit output current
(output internally high)
II+ = 0,
VO = 0
II– = 0,
–6 –18 –6 –10 mA
Pulldown current 0.5 1.3 0.5 1.3 mA
I
OL
Low-level output current
‡
II– = 5 µA VOL = 1 V 5 5 mA
I
CC
Supply current (four amplifiers) No load 6.2 10 6.2 10 mA
†
All characteristics are measured under open-loop conditions with zero common-mode voltage unless otherwise specified. Full range for TA is
–40°C to 85°C for LM2900 and 0°C to 70°C for LM3900.
‡
The output current-sink capability can be increased for large-signal conditions by overdriving the inverting input.
NOTE 4: These parameters are measured with the output balanced midway between VCC and GND.
operating characteristics, V
CC±
= ±15 V, TA = 25°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Low-to-high output
p
0.5
SR
Slew rate at unity gain
High-to-low output
V
O
= 10 V,
C
L
=
100 pF
,
R
L
= 2
kΩ
20
V/µs
LM2900, LM3900
QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
SLOS059 – JULY 1979 – REVISED SEPTEMBER 1990
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
†
Figure 1
– Input Bias Current – nA
IB
I
INPUT BIAS CURRENT (INVERTING INPUT)
vs
FREE-AIR TEMPERATURE
TA – Free-Air Temperature – °C
0
–75
10
20
30
40
50
60
70
80
– 50 – 25 0 25 50 75 100
VCC = 15 V
VO = 7.5 V
II+ = 0
Figure 2
0.9
TA – Free-Air Temperature –
°C
MIRROR GAIN
vs
FREE-AIR TEMPERATURE
– Mirror Gain
+
/I
1251007550250–25–50
1.2
1.15
1.1
1.05
1
0.95
0.85
–75
0.8
II+ = 10 µA
VCC = 15 V
I –
I
Figure 3
– Differential Voltage Amplification
VD
A
f – Frequency – Hz
LARGE SIGNAL
DIFFERENTIAL VOLTAGE AMPLIFICATION
vs
FREQUENCY
1
100 1 k 10 k 100 k
1 M
10 M
10
10
2
10
3
10
4
RL≥10 kΩ
RL = 2 kΩ
VCC = 15 V
TA = 25
°C
Figure 4
– Differential Voltage Amplification
VD
A
VCC – Supply Voltage – V
LARGE SIGNAL
DIFFERENTIAL VOLTAGE AMPLIFICATION
vs
SUPPLY VOLTAGE
0
10
4
10
3
10
2
10
1
51015202530
T
A
= 25°C
RL = 10 kΩ
†
Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
LM2900, LM3900
QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
SLOS059 – JULY 1979 – REVISED SEPTEMBER 1990
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
†
Figure 5
– Differential Voltage Amplification
VD
A
TA – Free-Air Temperature – °C
LARGE SIGNAL
DIFFERENTIAL VOLTAGE AMPLIFICATION
vs
FREE-AIR TEMPERATURE
1
–75
10
10
2
10
3
– 50 –25 0 25 50 75 100 125
VCC = 15 V
VO = 10 V
RL = 10 kΩ
10
4
Figure 6
– Supply Voltage Rejection Ratio – dB
SVR
K
f – Frequency – Hz
SUPPLY VOLTAGE REJECTION RATIO
vs
FREQUENCY
0
100
10
20
30
40
50
60
70
80
90
100
1 k 10 k 100 k 1 M400 k40 k4k400
TA = 25°C
VCC = 15 V
Figure 7
– Peak-To-Peak Output Voltage – V
f – Frequency – Hz
PEAK-TO-PEAK OUTPUT VOLTAGE
vs
FREQUENCY
0
1 k
2
4
6
8
10
12
14
16
10 k 100 k 1 M 10 M
II+ = 0
RL = 2 kΩ
VCC = 15 V
TA = 25°C
V
O(PP)
Figure 8
– Short-Circuit Output Current – mA
OS
I
VCC – Supply Voltage – V
SHORT-CIRCUIT OUTPUT CURRENT
(OUTPUT INTERNALLY HIGH)
vs
SUPPLY VOLTAGE
0
0
5
10
15
20
25
30
5 1015202530
V
O
= 0
II+ = 0
II– = 0
TA = 0°C
TA = 25°C
†
Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
LM2900, LM3900
QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
SLOS059 – JULY 1979 – REVISED SEPTEMBER 1990
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
†
Figure 9
VCC – Supply Voltage – V
– Low-Level Output Current – mA
OL
I
LOW-LEVEL OUTPUT CURRENT
vs
SUPPLY VOLTAGE
0
0
10
20
30
40
50
60
5 1015202530
VOL = 1 V
II+ = 0
TA = 25°C
II– = 100 µA
II– = 10 µA
II– = 5 µA
Figure 10
VCC – Supply Voltage – V
PULLDOWN CURRENT
vs
SUPPLY VOLTAGE
0
0
Pulldown Current – mA
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
5 1015202530
T
A
= – 40°C
TA = 25°C
TA = 85°C
PULLDOWN CURRENT
vs
FREE-AIR TEMPERATURE
0
–75
Pulldown Current – mA
TA – Free-Air Temperature –°C
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
– 50 – 25 0 25 50 75 100 125
VCC = 15 V
Figure 11
TOTAL SUPPLY CURRENT
vs
SUPPLY VOLTAGE
– Total Supply Current – mA
CC
I
0
0
VCC – Supply Voltage – V
1
2
3
4
5
6
7
8
5 1015202530
No Load
No Signal
TA = 25°C
Figure 12
†
Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
LM2900, LM3900
QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
SLOS059 – JULY 1979 – REVISED SEPTEMBER 1990
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
Norton (or current-differencing) amplifiers can be used in most standard general-purpose operational amplifier
applications. Performance as a dc amplifier in a single-power-supply mode is not as precise as a standard
integrated-circuit operational amplifier operating from dual supplies. Operation of the amplifier can best be
understood by noting that input currents are differenced at the inverting input terminal and this current then flows
through the external feedback resistor to produce the output voltage. Common-mode current biasing is generally
useful to allow operating with signal levels near (or even below) ground.
Internal transistors clamp negative input voltages at approximately –0.3 V but the magnitude of current flow has to
be limited by the external input network. For operation at high temperature, this limit should be approximately
– 100 µA.
Noise immunity of a Norton amplifier is less than that of standard bipolar amplifiers. Circuit layout is more critical since
coupling from the output to the noninverting input can cause oscillations. Care must also be exercised when driving
either input from a low-impedance source. A limiting resistor should be placed in series with the input lead to limit the
peak input current. Current up to 20 mA will not damage the device, but the current mirror on the noninverting input
will saturate and cause a loss of mirror gain at higher current levels, especially at high operating temperatures.
1 MΩ
1 MΩ
1 MΩ
100 kΩ
91 kΩ
30 kΩ
1 kΩ10 kΩ
Output
Input
V+
–
+
IO ≈ 1 mA per input volt
Figure 13. Voltage-Controlled Current Source
Output
Input
100 kΩ
1 MΩ 1 MΩ
V+
100 kΩ
1 kΩ
–
+
I
O
≈ 1 mA per input volt
Figure 14. Voltage-Controlled Current Sink
LM2900, LM3900
QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
SLOS059 – JULY 1979 – REVISED SEPTEMBER 1990
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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