TI LM3900N

LM2900, LM3900
QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
SLOS059 – JULY 1979 – REVISED SEPTEMBER 1990
D
D
D
D
D
D
D
N PACKAGE
(TOP VIEW)
Wide Range of Supply Voltages, Single or
Dual Supplies
Wide Bandwidth
Large Output Voltage Swing
Output Short-Circuit Protection
Internal Frequency Compensation
Low Input Bias Current
Designed to Be Interchangeable With
National Semiconductor LM2900 and
LM3900, Respectively
1IN +
2IN +
2IN –
2OUT
1OUT
1IN –
GND
1
14
2
13
3
12
4
11
5
10
6
9
7
8
VCC
3IN +
4IN +
4IN –
4OUT
3OUT
3IN –
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.
symbol (each amplifier)
+
IN +
OUT
–
IN –
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)
VCC
Constant
Current
Generator
200 µA
OUT
IN –
1.3 mA
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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
LM2900, LM3900
QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
SLOS059 – JULY 1979 – REVISED SEPTEMBER 1990
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
unlimited
unlimited
Duration of output short circuit (one amplifier) to ground at (or below) 25°C free-air temperature
(see Note 2)
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
260
260
°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
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
N
TA ≤ 25°C
POWER RATING
1150 mW
DERATING FACTOR
ABOVE TA = 25°C
9.2 mW/°C
TA = 70°C
POWER RATING
TA = 85°C
POWER RATING
736 mW
598 mW
recommended operating conditions
LM2900
Supply voltage, VCC (single supply)
LM3900
UNIT
MIN
MAX
MIN
MAX
4.5
32
4.5
32
V
V
Supply voltage, VCC + (dual supply)
2.2
16
2.2
16
Supply voltage, VCC – (dual supply)
– 2.2
– 16
– 2.2
– 16
V
–1
mA
Input current (see Note 3)
–1
Operating free-air temperature, TA
– 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.
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
LM2900, LM3900
QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
SLOS059 – JULY 1979 – REVISED SEPTEMBER 1990
electrical characteristics, VCC = 15 V, TA = 25°C (unless otherwise noted)
IIB
LM2900
TEST CONDITIONS†
PARAMETER
Input bias current (inverting input)
II + = 0
MIN
Change in mirror gain
MAX
30
200
TA = 25°C
TA = Full range
II+ = 20 µA to 200 µA
TA = Full range,
range
See Note 4
Mirror gain
LM3900
TYP
MIN
300
09
0.9
TYP
MAX
30
200
300
11
1.1
09
0.9
11
1.1
2%
5%
2%
5%
10
500
10
500
UNIT
nA
µA/µA
Mirror current
VI + = VI –,
See Note 4
g ,
TA = Full range,
AVD
Large-signal differential
voltage amplification
VO = 10 V,
f = 100 Hz
RL = 10 kΩ,
ri
Input resistance (inverting input)
1
1
MΩ
ro
Output resistance
8
8
kΩ
B1
Unity-gain bandwidth (inverting
input)
2.5
2.5
MHz
kSVR
Supply voltage rejection ratio
(∆VCC /∆VIO)
70
70
dB
VOH
High-level output voltage
III+ = 0
0,
II – = 0
VOL
Low-level output voltage
II + = 0,
RL = 2 kΩ
II – = 10 µA,
IOS
Short-circuit output current
(output internally high)
II + = 0,
VO = 0
II – = 0,
1.2
RL = 2 kΩ
1.2
13.5
VCC = 30 V,
No load
Pulldown current
2.8
2.8
µA
V/mV
13.5
29.5
0.09
V
29.5
0.2
0.09
0.2
V
–6
– 18
–6
– 10
mA
0.5
1.3
0.5
1.3
mA
IOL
II – = 5 µA
VOL = 1 V
5
5
mA
ICC
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.
Low-level output current‡
operating characteristics, VCC± = ±15 V, TA = 25°C
PARAMETER
SR
Slew rate at unity gain
TEST CONDITIONS
Low-to-high output
High-to-low output
V
VO = 10 V,
POST OFFICE BOX 655303
pF
CL = 100 pF,
• DALLAS, TEXAS 75265
RL = 2 kΩ
MIN
TYP
0.5
20
MAX
UNIT
V/µs
3
LM2900, LM3900
QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
SLOS059 – JULY 1979 – REVISED SEPTEMBER 1990
TYPICAL CHARACTERISTICS†
INPUT BIAS CURRENT (INVERTING INPUT)
vs
FREE-AIR TEMPERATURE
MIRROR GAIN
vs
FREE-AIR TEMPERATURE
1.2
80
VCC = 15 V
VO = 7.5 V
II + = 0
VCC = 15 V
II + = 10 µA
1.15
1.1
60
II – /I + – Mirror Gain
IIB – Input Bias Current – nA
70
50
40
30
1.05
1
0.95
20
0.9
10
0.85
0
– 75
– 50
– 25
0
25
50
75
TA – Free-Air Temperature – °C
0.8
– 75
100
– 50
– 25
0
25
50
75
100
TA – Free-Air Temperature – °C
Figure 1
Figure 2
LARGE SIGNAL
DIFFERENTIAL VOLTAGE AMPLIFICATION
vs
SUPPLY VOLTAGE
LARGE SIGNAL
DIFFERENTIAL VOLTAGE AMPLIFICATION
vs
FREQUENCY
104
104
VCC = 15 V
TA = 25°C
AVD – Differential Voltage Amplification
AVD – Differential Voltage Amplification
RL ≥ 10 kΩ
103
RL = 2 kΩ
102
10
1
100
1k
10 k
100 k
1M
10 M
103
102
10
RL = 10 kΩ
TA = 25°C
1
0
5
10
15
20
25
VCC – Supply Voltage – V
f – Frequency – Hz
Figure 3
Figure 4
† Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
4
125
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
30
LM2900, LM3900
QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
SLOS059 – JULY 1979 – REVISED SEPTEMBER 1990
TYPICAL CHARACTERISTICS†
LARGE SIGNAL
DIFFERENTIAL VOLTAGE AMPLIFICATION
vs
FREE-AIR TEMPERATURE
SUPPLY VOLTAGE REJECTION RATIO
vs
FREQUENCY
100
KSVR – Supply Voltage Rejection Ratio – dB
AVD – Differential Voltage Amplification
104
103
102
10
VCC = 15 V
VO = 10 V
RL = 10 kΩ
1
– 75
– 50
– 25
0
25
50
75
100
VCC = 15 V
TA = 25°C
90
80
70
60
50
40
30
20
10
0
100
125
400 1 k
TA – Free-Air Temperature – °C
SHORT-CIRCUIT OUTPUT CURRENT
(OUTPUT INTERNALLY HIGH)
vs
SUPPLY VOLTAGE
PEAK-TO-PEAK OUTPUT VOLTAGE
vs
FREQUENCY
16
30
VCC = 15 V
RL = 2 kΩ
II + = 0
TA = 25°C
14
12
IOS – Short-Circuit Output Current – mA
VO(PP) – Peak-To-Peak Output Voltage – V
40 k 100 k 400 k 1 M
Figure 6
Figure 5
10
8
6
ÁÁ
ÁÁ
ÁÁ
4
2
0
1k
4k 10 k
f – Frequency – Hz
10 k
100 k
1M
10 M
VO = 0
II + = 0
II – = 0
25
TA = 0°C
20
TA = 25°C
15
10
5
0
0
5
f – Frequency – Hz
Figure 7
10
15
20
VCC – Supply Voltage – V
25
30
Figure 8
† Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
LM2900, LM3900
QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
SLOS059 – JULY 1979 – REVISED SEPTEMBER 1990
TYPICAL CHARACTERISTICS†
LOW-LEVEL OUTPUT CURRENT
vs
SUPPLY VOLTAGE
PULLDOWN CURRENT
vs
SUPPLY VOLTAGE
2
VOL = 1 V
II + = 0
TA = 25°C
50
1.8
II – = 100 µA
40
30
20
II – = 10 µA
10
0
5
1.4
TA = 25°C
1.2
1
TA = 85°C
0.8
0.6
0.4
II – = 5 µA
0
TA = – 40°C
1.6
Pulldown Current – mA
IOL– Low-Level Output Current – mA
60
0.2
10
15
20
VCC – Supply Voltage – V
25
0
30
0
5
10
15
20
VCC – Supply Voltage – V
25
30
Figure 10
Figure 9
TOTAL SUPPLY CURRENT
vs
SUPPLY VOLTAGE
PULLDOWN CURRENT
vs
FREE-AIR TEMPERATURE
8
2
VCC = 15 V
1.8
7
I CC – Total Supply Current – mA
Pulldown Current – mA
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
– 75
– 50
– 25
0
25
50
75
100
125
6
5
4
3
2
TA = 25°C
No Signal
No Load
1
0
0
5
TA – Free-Air Temperature –°C
10
15
20
25
30
VCC – Supply Voltage – V
Figure 11
Figure 12
† Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
6
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
LM2900, LM3900
QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
SLOS059 – JULY 1979 – REVISED SEPTEMBER 1990
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.
V+
1 MΩ
10 kΩ
1 MΩ
1 kΩ
1 MΩ
–
Input
30 kΩ
100 kΩ
+
Output
91 kΩ
IO ≈ 1 mA per input volt
Figure 13. Voltage-Controlled Current Source
V+
1 MΩ
1 MΩ
–
Output
100 kΩ
+
Input
100 kΩ
1 kΩ
IO
≈ 1 mA per input volt
Figure 14. Voltage-Controlled Current Sink
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
7
LM2900, LM3900
QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
SLOS059 – JULY 1979 – REVISED SEPTEMBER 1990
8
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
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