TI1 LM3900 Quad amplifier Datasheet

LM2900,LM3301,LM3900
LM2900/LM3900/LM3301 Quad Amplifiers
Literature Number: SNOSBV6
General Description
The LM2900 series consists of four independent, dual input,
internally compensated amplifiers which were designed specifically to operate off of a single power supply voltage and to
provide a large output voltage swing. These amplifiers make
use of a current mirror to achieve the non-inverting input
function. Application areas include: ac amplifiers, RC active
filters, low frequency triangle, squarewave and pulse waveform generation circuits, tachometers and low speed, high
voltage digital logic gates.
n
n
n
n
n
n
n
Range or dual supplies: ± 2 VDC to ± 16 VDC
Supply current drain independent of supply voltage
Low input biasing current: 30 nA
High open-loop gain: 70 dB
Wide bandwidth: 2.5 MHz (unity gain)
Large output voltage swing: (V+ − 1) Vp-p
Internally frequency compensated for unity gain
Output short-circuit protection
Features
n Wide single supply voltage:
4 VDC to 32 VDC
Schematic and Connection Diagrams
LM2900/LM3900/LM3301
LM2900/LM3900/LM3301
Quad Amplifiers
LM2900/LM3900/LM3301 Quad Amplifiers
April 1998
Dual-In-Line and S.O.
DS007936-2
Top View
Order Number LM2900N, LM3900M, LM3900N or
LM3301N
See NS Package Number M14A or N14A
DS007936-1
© 1998 National Semiconductor Corporation
www.national.com
DS007936
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1
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
LM2900/LM3900
32 VDC
± 16 VDC
Supply Voltage
LM3301
28 VDC
± 14 VDC
Power Dissipation (TA = 25˚C) (Note 2)
Molded DIP
1080 mW
1080 mW
S.O. Package
765 mW
20 mADC
20 mADC
Input Currents, IIN+ or IIN−
Output Short-Circuit Duration — One Amplifier
Continuous
Continuous
TA = 25˚C (See Application Hints)
Operating Temperature Range
−40˚C to +85˚C
LM2900
−40˚C to +85˚C
LM3900
0˚C to +70˚C
Storage Temperature Range
−65˚C to +150˚C
−65˚C to +150˚C
Lead Temperature (Soldering, 10 sec.)
260˚C
260˚C
Soldering Information
Dual-In-Line Package
Soldering (10 sec.)
260˚C
260˚C
Small Outline Package
Vapor Phase (60 sec.)
215˚C
215˚C
Infrared (15 sec.)
220˚C
220˚C
See AN-450 “Surface Mounting Methods and Their Effect on Product Reliability” for other methods of soldering surface mount
devices.
ESD tolerance (Note 8)
2000V
2000V
Electrical Characteristics
(Note 7) TA = 25˚C, V+ = 15 VDC, unless otherwise stated
Parameter
Conditions
LM2900
LM3900
LM3301
Units
Min Typ Max Min Typ Max Min Typ Max
Open
Voltage Gain
Loop
Voltage Gain
Over Temp.
∆VO = 10 VDC
Input Resistance
Inverting Input
V/mV
1.2
Output
Resistance
2.8
1.2
2.8
1.2
2.8
1
1
1
MΩ
8
8
9
kΩ
Unity Gain Bandwidth
Inverting Input
2.5
Input Bias Current
Inverting Input, V+ = 5 VDC
30
2.5
200
30
2.5
200
30
MHz
300
nA
Inverting Input
Slew Rate
Positive Output Swing
0.5
0.5
0.5
20
20
20
Supply Current
Negative Output Swing
RL = ∞ On All Amplifiers
Output
VOUT High
Voltage
Swing
RL = 2k,
V+ = 15.0 VDC
VOUT Low
VOUT High
V+ = Absolute
Maximum Ratings
Output
Source
Current
Sink
Capability
ISINK
Power Supply Rejection
www.national.com
6.2
IIN− = 0,
13.5
IIN+ = 0
IIN− = 10 µA,
0.09
IIN+ = 0
IIN− = 0,
IIN+ = 0
RL = ∞,
29.5
(Note 3)
VOL = 1V, IIN− = 5 µA
TA = 25˚C, f = 100 Hz
10
6.2
10
13.5
0.2
V/µs
6.2
10
0.09
0.2
mADC
13.5
0.09
0.2
VDC
29.5
26.0
6
18
6
10
5
18
0.5
1.3
0.5
1.3
0.5
1.3
5
5
5
70
70
70
mADC
dB
2
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Electrical Characteristics
(Continued)
(Note 7) TA = 25˚C, V+ = 15 VDC, unless otherwise stated
Parameter
Conditions
LM2900
LM3900
LM3301
Units
Min Typ Max Min Typ Max Min Typ Max
Mirror Gain
@ 20 µA (Note 4)
0.90
1.0
1.1 0.90
1.0
1.1 0.90
1
1.10 µA/µA
@ 200 µA (Note 4)
0.90
1.0
1.1 0.90
1.0
1.1 0.90
1
1.10
∆Mirror Gain
@ 20 µA to 200 µA (Note 4)
2
5
2
5
2
5
%
Mirror Current
10
500
10
500
10
500
µADC
Negative Input Current
(Note 5)
TA = 25˚C (Note 6)
1.0
1.0
Input Bias Current
Inverting Input
300
300
1.0
mADC
nA
Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits.
Note 2: For operating at high temperatures, the device must be derated based on a 125˚C maximum junction temperature and a thermal resistance of 92˚C/W which
applies for the device soldered in a printed circuit board, operating in a still air ambient. Thermal resistance for the S.O. package is 131˚C/W.
Note 3: The output current sink capability can be increased for large signal conditions by overdriving the inverting input. This is shown in the section on Typical Characteristics.
Note 4: This spec indicates the current gain of the current mirror which is used as the non-inverting input.
Note 5: Input VBE match between the non-inverting and the inverting inputs occurs for a mirror current (non-inverting input current) of approximately 10 µA. This is
therefore a typical design center for many of the application circuits.
Note 6: Clamp transistors are included on the IC to prevent the input voltages from swinging below ground more than approximately −0.3 VDC. The negative input
currents which may result from large signal overdrive with capacitance input coupling need to be externally limited to values of approximately 1 mA. Negative input
currents in excess of 4 mA will cause the output voltage to drop to a low voltage. This maximum current applies to any one of the input terminals. If more than one
of the input terminals are simultaneously driven negative smaller maximum currents are allowed. Common-mode current biasing can be used to prevent negative input voltages; see for example, the “Differentiator Circuit” in the applications section.
Note 7: These specs apply for −40˚C ≤ TA ≤ +85˚C, unless otherwise stated.
Note 8: Human body model, 1.5 kΩ in series with 100 pF.
Application Hints
Unintentional signal coupling from the output to the
non-inverting input can cause oscillations. This is likely only
in breadboard hook-ups with long component leads and can
be prevented by a more careful lead dress or by locating the
non-inverting input biasing resistor close to the IC. A quick
check of this condition is to bypass the non-inverting input to
ground with a capacitor. High impedance biasing resistors
used in the non-inverting input circuit make this input lead
highly susceptible to unintentional AC signal pickup.
Operation of this amplifier can be best understood by noticing that input currents are differenced at the inverting-input
terminal and this difference 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 ground or even negative as
this maintains the inputs biased at +VBE. Internal clamp transistors (Note 6) catch-negative input voltages at approximately −0.3 VDC 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.
This new “Norton” current-differencing amplifier can be used
in most of the applications of a standard IC op amp. Performance as a DC amplifier using only a single supply is not as
precise as a standard IC op amp operating with split supplies
but is adequate in many less critical applications. New functions are made possible with this amplifier which are useful
in single power supply systems. For example, biasing can be
designed separately from the AC gain as was shown in the
“inverting amplifier,” the “difference integrator” allows controlling the charging and the discharging of the integrating
capacitor with positive voltages, and the “frequency doubling
tachometer” provides a simple circuit which reduces the
ripple voltage on a tachometer output DC voltage.
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. Currents as large as 20 mA
will not damage the device, but the current mirror on the
non-inverting input will saturate and cause a loss of mirror
gain at mA current levels — especially at high operating temperatures.
Precautions should be taken to insure that the power supply
for the integrated circuit never becomes reversed in polarity
or that the unit is not inadvertently installed backwards in a
test socket as an unlimited current surge through the resulting forward diode within the IC could cause fusing of the internal conductors and result in a destroyed unit.
Output short circuits either to ground or to the positive power
supply should be of short time duration. Units can be destroyed, not as a result of the short circuit current causing
metal fusing, but rather due to the large increase in IC chip
dissipation which will cause eventual failure due to excessive junction temperatures. For example, when operating
from a well-regulated +5 VDC power supply at TA = 25˚C with
a 100 kΩ shunt-feedback resistor (from the output to the inverting input) a short directly to the power supply will not
cause catastrophic failure but the current magnitude will be
approximately 50 mA and the junction temperature will be
above TJ max. Larger feedback resistors will reduce the current, 11 MΩ provides approximately 30 mA, an open circuit
provides 1.3 mA, and a direct connection from the output to
the non-inverting input will result in catastrophic failure when
the output is shorted to V+ as this then places the
base-emitter junction of the input transistor directly across
the power supply. Short-circuits to ground will have magnitudes of approximately 30 mA and will not cause catastrophic failure at TA = 25˚C.
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Typical Performance Characteristics
Open Loop Gain
Voltage Gain
Voltage Gain
DS007936-53
Input Current
DS007936-54
Supply Current
DS007936-55
Large Signal Frequency
Response
DS007936-57
DS007936-56
DS007936-58
Output Sink Current
Output Class-A Bias Current
DS007936-59
Supply Rejection
DS007936-61
DS007936-60
Mirror Gain
Maximum Mirror Current
DS007936-63
DS007936-62
www.national.com
Output Source Current
DS007936-64
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Typical Applications
(V+ = 15 VDC)
Triangle/Square Generator
Inverting Amplifier
DS007936-3
DS007936-4
Frequency-Doubling Tachometer
Low VIN − VOUT Voltage Regulator
DS007936-5
DS007936-6
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Typical Applications
(V+ = 15 VDC) (Continued)
Negative Supply Biasing
Non-Inverting Amplifier
DS007936-8
DS007936-7
Low-Drift Ramp and Hold Circuit
DS007936-10
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Typical Applications
(V+ = 15 VDC) (Continued)
Bi-Quad Active Filter
(2nd Degree State-Variable Network)
DS007936-11
Q = 50
fO = 1 kHz
Voltage-Controlled Current Source
(Transconductance Amplifier)
DS007936-12
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Typical Applications
(V+ = 15 VDC) (Continued)
Hi VIN , Lo (VIN − VO) Self-Regulator
DS007936-13
Q1 & Q2 absorb Hi VIN
Ground-Referencing a Differential Input Signal
DS007936-14
Voltage Regulator
Fixed Current Sources
DS007936-15
(VO = VZ + VBE)
DS007936-16
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Typical Applications
(V+ = 15 VDC) (Continued)
Buffer Amplifier
Voltage-Controlled Current Sink
(Transconductance Amplifier)
DS007936-18
VIN ≥ VBE
DS007936-17
Tachometer
DS007936-19
VODC = A fIN
* Allows VO to go to zero.
Low-Voltage Comparator
Power Comparator
DS007936-21
DS007936-20
No negative voltage limit if properly biased.
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Typical Applications
(V+ = 15 VDC) (Continued)
Schmitt-Trigger
Comparator
DS007936-22
DS007936-23
Square-Wave Oscillator
Pulse Generator
DS007936-24
DS007936-25
Frequency Differencing Tachometer
DS007936-26
VODC = A (f1 − f2)
Frequency Averaging Tachometer
DS007936-27
VODC = A (f1 + f2)
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Typical Applications
(V+ = 15 VDC) (Continued)
Bi-Stable Multivibrator
Squaring Amplifier (W/Hysteresis)
DS007936-29
DS007936-28
Differentiator (Common-Mode
Biasing Keeps Input at +VBE)
“OR” Gate
DS007936-31
f =A+B+C
DS007936-30
“AND” Gate
Difference Integrator
DS007936-32
DS007936-33
f=A•B•C
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Typical Applications
(V+ = 15 VDC) (Continued)
Low Pass Active Filter
DS007936-34
fO = 1 kHz
Staircase Generator
VBE Biasing
DS007936-35
DS007936-36
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Typical Applications
(V+ = 15 VDC) (Continued)
Bandpass Active Filter
DS007936-37
fo = 1 kHz
Q = 25
Low-Frequency Mixer
DS007936-38
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Typical Applications
(V+ = 15 VDC) (Continued)
Free-Running Staircase Generator/Pulse Counter
DS007936-39
Supplying IIN with Aux. Amp
(to Allow Hi-Z Feedback Networks)
DS007936-40
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Typical Applications
(V+ = 15 VDC) (Continued)
One-Shot Multivibrator
DS007936-41
PW ≅ 2 x 106C
* Speeds recovery.
Non-Inverting DC Gain to (0,0)
DS007936-42
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Typical Applications
(V+ = 15 VDC) (Continued)
Channel Selection by DC Control (or Audio Mixer)
DS007936-43
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Typical Applications
(V+ = 15 VDC) (Continued)
Power Amplifier
DS007936-44
One-Shot with DC Input Comparator
DS007936-45
Trips at VIN ≅ 0.8 V+
VIN must fall 0.8 V+ prior to t2
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Typical Applications
(V+ = 15 VDC) (Continued)
High Pass Active Filter
DS007936-46
Sample-Hold and Compare with New +VIN
DS007936-47
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Typical Applications
(V+ = 15 VDC) (Continued)
Sawtooth Generator
DS007936-48
Phase-Locked Loop
DS007936-49
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Typical Applications
(V+ = 15 VDC) (Continued)
Boosting to 300 mA Loads
DS007936-50
Split-Supply Applications
(V+ = +15 VDC & V− = −15 VDC)
Book
Extract
End
Non-Inverting DC Gain
DS007936-51
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Split-Supply Applications
(V+ = +15 VDC & V− = −15 VDC) (Continued)
Book
Extract
End
AC Amplifier
DS007936-52
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THIS PAGE IS IGNORED IN THE DATABOOK
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Physical Dimensions
inches (millimeters) unless otherwise noted
Small Outline Package (M)
Order Number LM3900M
NS Package Number M14A
Molded Dual-In-Line Package (N)
Order Number LM2900N, LM3900N or LM3301N
NS Package Number N14A
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LM2900/LM3900/LM3301 Quad Amplifiers
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PrintDate=1998/04/29 PrintTime=11:07:23 39954 ds007936 Rev. No. 3
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