Datasheet LM308N, LM308M, LM308H, LM108H-883, LM108H Datasheet (NSC)

Page 1
LM108/LM208/LM308 Operational Amplifiers
General Description
The LM108 series are precision operational amplifiers hav­ing specifications a factor of ten better than FET amplifiers
over a
55§Ctoa125§C temperature range.
The devices operate with supply voltages fromg2V to
g
20V and have sufficient supply rejection to use unregulat­ed supplies. Although the circuit is interchangeable with and uses the same compensation as the LM101A, an alternate compensation scheme can be used to make it particularly insensitive to power supply noise and to make supply by­pass capacitors unnecessary.
The low current error of the LM108 series makes possible many designs that are not practical with conventional ampli­fiers. In fact, it operates from 10 MX source resistances,
Compensation Circuits
introducing less error than devices like the 709 with 10 kX sources. Integrators with drifts less than 500 mV/sec and analog time delays in excess of one hour can be made us­ing capacitors no larger than 1 mF.
The LM108 is guaranteed from LM208 from
a
70§C.
25§Ctoa85§C, and the LM308 from 0§Cto
Features
Y
Maximum input bias current of 3.0 nA over temperature
Y
Offset current less than 400 pA over temperature
Y
Supply current of only 300 mA, even in saturation
Y
Guaranteed drift characteristics
December 1994
55§Ctoa125§C, the
LM108/LM208/LM308 Operational Amplifiers
Standard Compensation Circuit
**Bandwidth and slew rate are proportional to 1/C
R1 C
O
t
C
f
R1aR2
e
C
30 pF
O
TL/H/7758– 1
f
Feedforward Compensation
Alternate* Frequency Compensation
*Improves rejection of power supply noise by a factor of ten.
**Bandwidth and slew rate are proportional to 1/C
s
TL/H/7758– 2
TL/H/7758– 3
C
1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.
TL/H/7758
Page 2
Absolute Maximum Ratings
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. (Note 5)
LM108/LM208 LM308
Supply Voltage
g
20V
g
18V Power Dissipation (Note 1) 500 mW 500 mW Differential Input Current (Note 2) Input Voltage (Note 3)
g
10 mA
g
15V
g
g
10 mA
15V Output Short-Circuit Duration Continuous Continuous Operating Temperature Range (LM108)
(LM208)
Storage Temperature Range
55§Ctoa125§C0
25§Ctoa85§C
65§Ctoa150§C
Ctoa70§C
§
65§Ctoa150§C
Lead Temperature (Soldering, 10 sec)
DIP 260
C 260§C
§
H Package Lead Temp
(Soldering 10 seconds) 300
C 300§C
§
Soldering Information
Dual-In-Line Package
Soldering (10 seconds) 260
C
§
Small Outline Package
Vapor Phase (60 seconds) 215 Infrared (15 seconds) 220
C
§
C
§
See AN-450 ‘‘Surface Mounting Methods and Their Effect on Product Reliability’’ for other methods of soldering surface mount devices.
ESD Tolerance (Note 6) 2000V
Electrical Characteristics (Note 4)
Parameter Condition
Input Offset Voltage T
Input Offset Current T
Input Bias Current T
Input Resistance T
Supply Current T
Large Signal Voltage T Gain V
25§C 0.7 2.0 2.0 7.5 mV
A
25§C 0.05 0.2 0.2 1 nA
A
25§C 0.8 2.0 1.5 7 nA
A
25§C 3070 1040 MX
A
25§C 0.3 0.6 0.3 0.8 mA
A
A OUT
25§C, V
g
S
10V, R
g
15V
t
10 kX
L
Input Offset Voltage 3.0 10 mV
Average Temperature Coefficient of Input 3.0 15 6.0 30 mV/ Offset Voltage
Input Offset Current 0.4 1.5 nA
Average Temperature Coefficient of Input 0.5 2.5 2.0 10 pA/ Offset Current
Input Bias Current 3.0 10 nA
Supply Current T
Large Signal Voltage V Gain R
Output Voltage Swing V
ea
125§C 0.15 0.4 mA
A
g
15V, V
S
t
10 kX
L
g
15V, R
S
OUT
L
g
10 kX
10V
LM108/LM208 LM308
Min Typ Max Min Typ Max
Units
50 300 25 300 V/mV
25 15 V/mV
g
g
13
14
g
g
13
14 V
C
§
C
§
2
Page 3
Electrical Characteristics (Note 4) (Continued)
Parameter Condition
Input Voltage Range V
g
15V
S
Common Mode Rejection Ratio
Supply Voltage Rejection Ratio
Note 1: The maximum junction temperature of the LM108 is 150§C, for the LM208, 100§C and for the LM308, 85§C. For operating at elevated temperatures, devices in the H08 package must be derated based on a thermal resistance of 160 dual-in-line package is 100
Note 2: The inputs are shunted with back-to-back diodes for overvoltage protection. Therefore, excessive current will flow if a differential input voltage in excess of 1V is applied between the inputs unless some limiting resistance is used.
Note 3: For supply voltages less than
Note 4: These specifications apply for
specifications are limited to
Note 5: Refer to RETS108X for LM108 military specifications and RETs 108AX for LM108A military specifications.
Note 6: Human body model, 1.5 kX in series with 100 pF.
C/W, junction to ambient.
§
g
15V, the absolute maximum input voltage is equal to the supply voltage.
g
5VsV
S
25§CsT
s
85§C, and for the LM308 they are limited to 0§CsT
A
b
s
g
20V andb55§CsT
LM108/LM208 LM308
Min Typ Max Min Typ Max
g
13.5
g
14 V
85 100 80 100 dB
80 96 80 96 dB
C/W, junction to ambient, or 20§C/W, junction to case. The thermal resistance of the
§
s
a
125§C, unless otherwise specified. With the LM208, however, all temperature
A
s
70§C.
A
Units
Schematic Diagram
TL/H/7758– 8
3
Page 4
Typical Performance Characteristics LM108/LM208
Input Currents Offset Error Drift Error
Input Noise Voltage Power Supply Rejection Output Impedance
Voltage Gain Output Swing Supply Current
Open Loop Frequency Response
Large Signal Frequency Response
Closed Loop
Voltage Follower Pulse Response
TL/H/7758– 6
4
Page 5
Typical Performance Characteristics LM308
Input Currents Offset Error Drift Error
Input Noise Voltage Power Supply Rejection Output Impedance
Voltage Gain Output Swing Supply Current
Open Loop Frequency Response
Large Signal Frequency Response
Closed Loop
Voltage Follower Pulse Response
TL/H/7758– 7
5
Page 6
Typical Applications
²
Teflon polyethylene or polycarbonate dielectric capacitor
Worst case drift less than
2.5 mV/sec
Sample and Hold
TL/H/7758– 4
High Speed Amplifier with Low Drift and Low Input Current
TL/H/7758– 5
6
Page 7
Typical Applications (Continued)
²
Fast
Summing Amplifier
*In addition to increasing
speed, the LM101A raises Small Signal Bandwidth: 3.5 MHz high and low frequency Slew Rate: 10V/mS gain, increases output drive capability and eliminates thermal feedback.
Connection Diagrams
Metal Can Package
TL/H/7758– 13
*Package is connected to Pin 4 (Vb)
**Unused pin (no internal connection) to allow for input anti-leakage guard
ring on printed circuit board layout.
Order Number LM108H, LM108H/883,
LM308AH or LM308H
See NS Package Number H08C
²
Power Bandwidth: 250 KHz
b
8
6c10
e
³
C5
R
f
TL/H/7758– 12
Dual-In-Line Package
Top View
TL/H/7758– 15
Order Number LM108J-8/883, LM308M or LM308N
See NS Package Number J08A, M08A or N08E
Top View
Order Number LM108J/883
See NS Package Number J14A
TL/H/7758– 16
Order Number LM108W/883
See NS Package Number W10A
²
Also available per JM38510/10104
7
TL/H/7758– 17
Page 8
Physical Dimensions inches (millimeters)
Ceramic Dual-In-Line Package (J)
Order Number LM108J/883
NS Package Number J08A
Ceramic Dual-In-Line Package (J)
Order Number LM108/883 NS Package Number J14A
8
Page 9
Physical Dimensions inches (millimeters) (Continued)
Order Number LM108H, LM108H/883 or LM308H
Metal Can Package (H)
NS Package Number H08C
S.O. Package (M)
Order Number LM308M
NS Package Number M08A
9
Page 10
Physical Dimensions inches (millimeters) (Continued)
Molded Dual-In-Line Package (N)
Order Number LM308N
NS Package Number N08E
LM108/LM208/LM308 Operational Amplifiers
Ceramic Flatpack Package (W)
Order Number LM108AW/883 or
LM108W/883
NS Package Number W10A
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