 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| Order this document by LM308A/D LM308A Precision Operational Amplifier The LM308A operational amplifier provides high input impedance, low input offset and temperature drift, and low noise. These characteristics are made possible by use of a special Super Beta processing technology. This amplifier is particularly useful for applications where high accuracy and low drift performance are essential. In addition high speed performance may be improved by employing feedforward compensation techniques to maximize slew rate without compromising other performance criteria. The LM308A offers extremely low input offset voltage and drift specifications allowing usage in even the most critical applications without external offset nulling. * Operation from a Wide Range of Power Supply Voltages SUPER GAIN OPERATIONAL AMPLIFIER SEMICONDUCTOR TECHNICAL DATA * * * Low Input Bias and Offset Currents Low Input Offset Voltage and Guaranteed Offset Voltage Drift Performance High Input Impedance 8 1 N SUFFIX PLASTIC PACKAGE CASE 626 Frequency Compensation 8 1 Standard Compensation R2 Inverting Input Noninverting Input R1 R3 Compen A + Modified Compensation R2 Cf Inverting Input Output Noninverting Compen B Input 1 1+ R2 R1 R1 R3 + 100 pF Output Compen B D SUFFIX PLASTIC PACKAGE CASE 751 (SO-8) Cf 30 PIN CONNECTIONS Compen A Standard Feedforward Compensation 10 k Input 10 k + 500 pF Compen A Output Compen B 3.0 k 10 pF 5.0 pF 1 2 8 Compen B VCC Output NC Feedforward Compensations for Decoupling Load Capacitance RS > 10 k Input C2* 0.01 F + 500 pF 3.0 k 10 pF Compen A *C2 > 10 pF 500 Output Compen B CL 75 pF to 0.01F 5 x 105 pF R2 100 k - + 7 6 5 Inputs VEE 3 4 (Top View) ORDERING INFORMATION Device LM308AN LM308AD Operating Temperature Range TA = 0 to +70C Package Plastic DIP SO-8 Rev 0 (c) Motorola, Inc. 1996 MOTOROLA ANALOG IC DEVICE DATA 1 LM308A MAXIMUM RATINGS (TA = +25C, unless otherwise noted.) Rating Power Supply Voltage Input Voltage (See Note 1) Input Differential Current ( See Note 2) Output Short Circuit Duration Operating Ambient Temperature Range Storage Temperature Range Junction Temperature Symbol VCC, VEE VI IID tSC TA Tstg TJ Value 18 15 10 Indefinite 0 to +70 -65 to +150 +150 C C C Unit Vdc V mA NOTES: 1. For supply voltages less than 15 V, the maximum input voltage is equal to the supply voltage. 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 1.0 V is applied between the inputs, unless some limiting resistance is used. ELECTRICAL CHARACTERISTICS (Unless otherwise noted these specifications apply for supply voltages of +5.0 V VCC +15 V and -5.0 V VEE -15 V, TA = +25C.) Input Offset Voltage Input Offset Current Input Bias Current Input Resistance Power Supply Currents (VCC = +15 V, VEE = -15 V) Large Signal Voltage Gain (VCC = +15 V, VEE = -15 V, VO = 10 V, RL 10 k) The following specifications apply over the operating temperature range. Input Offset Voltage Input Offset Current Average Temperature Coefficient of Input Offset Voltage TA (min) TA TA (max) Average Temperature Coefficient of Input Offset Current Input Bias Current Large Signal Voltage Gain (VCC +15 V, VEE = -15 V, VO = 10 V, RL 10 k) Input Voltage Range (VCC = +15 V, VEE = -15 V) Common Mode Rejection (RS 50 k) Supply Voltage Rejection (RS 50 k) Output Voltage Range (VCC = +15 V, VEE = -15 V, RL = 10 k) VOR 13 14 - V PSR 96 110 - dB CMR 96 110 - dB VICR 14 - - V IIO/T IIB AVOL - - 60 2.0 - - 10 10 - pA/C nA V/mV VIO IIO VIO/T - - - - - 1.0 0.73 1.5 5.0 mV nA V/C AVOL 80 300 - V/mV Characteristic Symbol VIO IIO IIB ri ICC, IEE Min - - - 10 - Typ 0.3 0.2 1.5 40 0.3 Max 0.5 1.0 7.0 - 0.8 Unit mV nA nA M mA 2 MOTOROLA ANALOG IC DEVICE DATA LM308A Figure 1. Input Bias and Input Offset Currents I IB , INPUT BIAS CURRENT (nA) 0.25 0.20 IIO IIB 0.10 0.05 0 120 140 0.15 I IO, INPUT OFFSET CURRENT (nA) 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 -60 -40 -20 0 20 40 60 80 T, TEMPERATURE (C) 100 EQUIVALENT INPUT OFFSET VOLTAGE (mV) 2.0 100 Figure 2. Maximum Equivalent Input Offset Voltage Error versus Input Resistance 10 1.0 0.1 100 k 1.0 M 10 M ri, INPUT RESISTANCE () 100 M Figure 3. Voltage Gain versus Supply Voltages IEE , SUPPLY CURRENTS ( A) 130 AVOL , VOLTAGE GAIN (dB) 120 110 TA = 0C +25C -55C +70C +125C CF = 0 f = 100 Hz 500 400 300 200 100 0 0 5.0 10 15 20 0 Figure 4. Power Supply Currents versus Power Supply Voltages TA = -55C 0C +25C +70C +125C 100 90 80 I CC = 5.0 10 15 20 VCC = VEE, SUPPLY VOLTAGES (V) VCC = VEE, SUPPLY VOLTAGES (V) Figure 5. Open Loop Frequency Response 140 VOR, OUTPUT VOLTAGE RANGE ( Vp-p) 120 AVOL , VOLTAGE GAIN (dB) 100 80 CF = 3.0 pF 60 40 20 0 -20 1.0 CF = 100 pF 10 100 1.0 k 10 k 100 k 1.0 M 10 M 100 M f, FREQUENCY (Hz) CF = 30 pF 20 16 12 8.0 Figure 6. Large Signal Frequency Response VCC = +15 V VEE = -15 V TA = +25C CF = 3.0 pF 4.0 CF = 30 pF 0 1.0 k 10 k 100 k f, FREQUENCY (Hz) 1.0 M MOTOROLA ANALOG IC DEVICE DATA 3 LM308A SUGGESTED DESIGN APPLICATIONS INPUT GUARDING Special care must be taken in the assembly of printed circuit boards to take full advantage of the low input currents of the LM308A amplifier. Boards must be thoroughly cleaned with alcohol and blown dry with compressed air. After cleaning, the boards should be coated with epoxy or silicone rubber to prevent contamination. Even with properly cleaned and coated boards, leakage currents may cause trouble at +125C, particularly since the input pins are adjacent to pins that are at supply potentials. This leakage can be significantly reduced by using guarding to lower the voltage difference between the inputs and adjacent metal runs. The guard, which is a conductive ring surrounding the inputs, is connected to a low-impedance point that is at approximately the same voltage as the inputs. Leakage currents from high voltage pins are then absorbed by the guard. Figure 8. Sample and Hold VCC 1.0 M Input 150 pF 1 6 LM101A (3) or equiv Q1 Sample Output Q2 1.0 F (1) 30 pF Output Figure 7. Fast (1) Summing Amplifier with Low Input Current C5 (2) R1 R4 0.002 F LM308A RS Input 150 k 0.002 F R2 1M 2 3 1.0 M Compen B 300 pF (1) Power Bandwidth: 250 kHz Small Signal Bandwidth: 3.5 MHz Slew Rate: 10 V/s (2) C5 = 6 X 10-8 R1 (3) In addition to increasing speed, the LM101A raises high and low frequency gain, increases output drive capability and eliminates thermal feedback. (1) Teflon, Polyethylene or Polycarbonate Dielectric Capacitor Figure 9. Connection of Input Guards Inverting Amplifier R1 Input R2 R3 (1) R3 (1) Output Output R3 (1) C1 C1 (1) Used to compensate for large source resistances. C1 Input R1 R2 Note: must be an impedance. R1 +R2 Input R1 Output Follower Noninverting Amplifier R2 4 MOTOROLA ANALOG IC DEVICE DATA LM308A Representative Circuit Schematic Compensation A 3.5 k 5.6 k Compensation B VCC 7.5 k 15 pF 17.4 k 17.4 k 7.5 k 1.0 k 1.4 k 200 7.0 k 1.0 k 80 k Inputs 2.0 k 2.0 k 20 k 1.0 k 150 VEE VCC 65 Output ) 10 k 362 1.2 k 50 k VEE MOTOROLA ANALOG IC DEVICE DATA 5 LM308A OUTLINE DIMENSIONS N SUFFIX PLASTIC PACKAGE CASE 626-05 ISSUE K NOTES: 1. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 2. PACKAGE CONTOUR OPTIONAL (ROUND OR SQUARE CORNERS). 3. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. DIM A B C D F G H J K L M N MILLIMETERS MIN MAX 9.40 10.16 6.10 6.60 3.94 4.45 0.38 0.51 1.02 1.78 2.54 BSC 0.76 1.27 0.20 0.30 2.92 3.43 7.62 BSC --- 10_ 0.76 1.01 INCHES MIN MAX 0.370 0.400 0.240 0.260 0.155 0.175 0.015 0.020 0.040 0.070 0.100 BSC 0.030 0.050 0.008 0.012 0.115 0.135 0.300 BSC --- 10_ 0.030 0.040 8 5 -B- 1 4 F NOTE 2 -A- L C -T- SEATING PLANE J N D K M M H G 0.13 (0.005) TA M B M D SUFFIX PLASTIC PACKAGE CASE 751-05 (SO-8) ISSUE R A 8 D 5 C E 1 4 H 0.25 M B M h B C e A SEATING PLANE X 45 _ NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. DIMENSIONS ARE IN MILLIMETERS. 3. DIMENSION D AND E DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE. 5. DIMENSION B DOES NOT INCLUDE MOLD PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS OF THE B DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A A1 B C D E e H h L MILLIMETERS MIN MAX 1.35 1.75 0.10 0.25 0.35 0.49 0.18 0.25 4.80 5.00 3.80 4.00 1.27 BSC 5.80 6.20 0.25 0.50 0.40 1.25 0_ 7_ q L 0.10 A1 0.25 B M CB S A S q 6 MOTOROLA ANALOG IC DEVICE DATA LM308A Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. MOTOROLA ANALOG IC DEVICE DATA 7 LM308A How to reach us: USA / EUROPE / Locations Not Listed: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. 1-800-441-2447 or 602-303-5454 MFAX: RMFAX0@email.sps.mot.com - TOUCHTONE 602-244-6609 INTERNET: http://Design-NET.com JAPAN: Nippon Motorola Ltd.; Tatsumi-SPD-JLDC, 6F Seibu-Butsuryu-Center, 3-14-2 Tatsumi Koto-Ku, Tokyo 135, Japan. 03-81-3521-8315 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852-26629298 8 MOTOROLA ANALOG IC DEVICE DATA LM308A/D *LM308A/D* |
Price & Availability of LM308A
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |