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LF151 LF251 - LF351
WIDE BANDWIDTH SINGLE J-FET OPERATIONAL AMPLIFIER
s INTERNALLY ADJUSTABLE INPUT OFFSET
VOLTAGE
s LOW POWER CONSUMPTION s WIDE COMMON-MODE (UP TO VCC+) AND
DIFFERENTIAL VOLTAGE RANGE
s LOW INPUT BIAS AND OFFSET CURRENT s OUTPUT SHORT-CIRCUIT PROTECTION s HIGH INPUT IMPEDANCE J-FET INPUT
STAGE
N DIP8 (Plastic Package)
s INTERNAL FREQUENCY COMPENSATION s LATCH UP FREE OPERATION s HIGH SLEW RATE : 16V/s (typ)
D SO8 (Plastic Micropackage)
DESCRIPTION These circuits are high speed J-FET input singleoperational amplifiers incorporating well matched, high voltage J-FET and bipolar transistors in a monolithic integrated circuit. The devices feature high slew rates, low input bias and offset currents, and low offset voltage temperature coefficient. PIN CONNECTIONS (top view)
ORDER CODE
Package Part Number LF351 LF251 LF151 Temperature Range N 0C, +70C -40C, +105C -55C, +125C * * * D * * *
N = Dual in Line Package (DIP) D = Small Outline Package (SO) - also available in Tape & Reel (DT)
1 2 3 4
8 7 6 5
12345678-
Offset null 1 Inverting input Non-inverting input VCCOffset null 2 Output VCC+ N.C.
March 2001
1/9
LF151 - LF251 - LF351
SCHEMATIC DIAGRAM
INPUT OFFSET VOLTAGE NULL CIRCUIT
ABSOLUTE MAXIMUM RATINGS
Symbol VCC Vi Vid Ptot Toper Tstg
1. 2. 3. 4.
Parameter Supply voltage - note Input Voltage - note Power Dissipation Output Short-circuit Duration - note Storage Temperature Range
4) 2) 1)
LF151
LF251
LF351
Unit V V V mW
18 15 30 680 Infinite -55 to +125 -40 to +105 -65 to +150 0 to +70
Differential Input Voltage - note 3)
Operating Free-air Temperature Range
C C
All voltage values, except differential voltage, are with respect to the zero reference level (ground) of the supply voltages where the zero reference level is the midpoint between VCC + and VCC -. The magnitude of the input voltage must never exceed the magnitude of the supply voltage or 15 volts, whichever is less. Differential voltages are the non-inverting input terminal with respect to the inverting input terminal. The output may be shorted to ground or to either supply. Temperature and/or supply voltages must be limited to ensure that the dissipation rating is not exceeded
2/9
LF151 - LF251 - LF351
ELECTRICAL CHARACTERISTICS VCC = 15V, Tamb = +25C (unless otherwise specified)
Symbol Vio DVio Iio Parameter Input Offset Voltage (Rs = 10k) Tamb = +25C Tmin Tamb Tmax Input Offset Voltage Drift Input Offset Current- note 1) Tamb = +25C Tmin Tamb Tmax Input Bias Current -note 1 Tamb = +25C Tmin Tamb Tmax Large Signal Voltage Gain (RL = 2k, Vo = 10V) Tamb = +25C Tmin Tamb Tmax Supply Voltage Rejection Ratio (RS = 10k) Tamb = +25C Tmin Tamb Tmax Supply Current, no load Tamb = +25C Tmin Tamb Tmax Input Common Mode Voltage Range Common Mode Rejection Ratio (RS = 10k) Tamb = +25C Tmin Tamb Tmax Output Short-circuit Current Tamb = +25C Tmin Tamb Tmax Output Voltage Swing Tamb = +25C Vopp Tmin Tamb Tmax RL = RL = RL = RL = 2k 10k 2k 10k 11 50 25 80 80 Min. Typ. 3 10 5 100 4 200 20 V/mV 200 dB 86 Max. 10 13 V/C pA nA nA 20 Unit mV
Iib
Avd
SVR
ICC Vicm CMR
1.4 +15 -12 86
3.4 3.4
mA V dB
70 70 10 10 10 12 10 12 12
mA 40 60 60 V 12 13.5
IOS
SR tr Kov GBP Ri
Slew Rate Vi = 10V, RL = 2k, CL = 100pF, Tamb = +25C, unity gain Rise Time Vi = 20mV, RL = 2k, CL = 100pF, Tamb = +25C, unity gain Overshoot Vi = 20mV, RL = 2k, CL = 100pF, Tamb = +25C, unity gain Gain Bandwidth Product f = 100kHz, Tamb = +25C,Vin = 10mV, RL = 2k, CL = 100pF Input Resistance
V/s 16 s 0.1 % 10 MHz 2.5 4 1012 0.01 15 45 nV ----------Hz Degrees
THD
en m
1.
Total Harmonic Distortion ( f = 1kHz, Av = 20dB RL = 2k, CL = 100pF, Tamb = +25C,Vo = 2Vpp)
Equivalent Input Noise Voltage RS = 100, f = 1KHz Phase Margin
The input bias currents are junction leakage currents which approximately double for every 10C increase in the junction temperature.
MAXIMUM PEAK-TO-PEAK OUTPUT
3/9
LF151 - LF251 - LF351
VOLTAGE versus FREQUENCY VOLTAGE versus FREQUENCY
MAXIMUM PEAK-TO-PEAK OUTPUT VOLTAGE versus FREQUENCY
MAXIMUM PEAK-TO-PEAK OUTPUT VOLTAGE versus FREE AIR TEMP.
MAXIMUM PEAK-TO-PEAK OUTPUT VOLTAGE versus LOAD RESISTANCE
MAXIMUM PEAK-TO-PEAK OUTPUT VOLTAGE versus SUPLY VOLTAGE
MAXIMUM PEAK-TO-PEAK OUTPUT
4/9
INPUT BIAS CURRENT versus FREE AIR
LF151 - LF251 - LF351
TEMPERATURE AMPLIFICATION versus FREE AIR TEMP.
LARGE SIGNAL DIFFERENTIAL VOLTAGE AMPLIFICATION AND PHASE SHIFT versus FREQUENCY
TOTAL POWER DISSIPATION versus FREE AIR TEMPERATURE
SUPPLY CURRENT PER AMPLIFIER versus FREE AIR TEMPERATURE
SUPPLY CURRENT PER AMPLIFIER versus SUPPLY VOLTAGE
LARGE SIGNAL DIFFERENTIAL VOLTAGE
COMMON MODE REJECTION RATIO versus
5/9
LF151 - LF251 - LF351
FREE AIR TEMPERATURE VOLTAGE FOLLOWER LARGE SIGNAL PULSE RESPONSE
OUTPUT VOLTAGE versus ELAPSED TIME EQUIVALENT INPUT NOISE VOLTAGE versus FREQUENCY
TOTAL HARMONIC DISTORTION versus FREQUENCY
6/9
LF151 - LF251 - LF351
PARAMETER MEASUREMENT INFORMATION Figure 1 : Voltage Follower
Figure 2 : Gain-of-10 inverting amplifier
TYPICAL APPLICATION (0.5Hz) SQUARE WAVE OSCILLATOR
HIGH Q NOTCH FILTER
7/9
LF151 - LF251 - LF351
PACKAGE MECHANICAL DATA 8 PINS - PLASTIC DIP
Millimeters Dim. Min. A a1 B b b1 D E e e3 e4 F i L Z 0.51 1.15 0.356 0.204 7.95 2.54 7.62 7.62 6.6 5.08 3.81 1.52 Typ. 3.32 1.65 0.55 0.304 10.92 9.75 0.020 0.045 0.014 0.008 0.313 Max. Min.
Inches Typ. 0.131 0.065 0.022 0.012 0.430 0.384 0.100 0.300 0.300 0260 0.200 0.150 0.060 Max.
3.18
0.125
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LF151 - LF251 - LF351
PACKAGE MECHANICAL DATA 8 PINS - PLASTIC MICROPACKAGE (SO)
Millimeters Dim. Min. A a1 a2 a3 b b1 C c1 D E e e3 F L M S 0.1 0.65 0.35 0.19 0.25 4.8 5.8 1.27 3.81 3.8 0.4 4.0 1.27 0.6 8 (max.) 0.150 0.016 Typ. Max. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 45 (typ.) 5.0 6.2 0.189 0.228 Min. 0.004 0.026 0.014 0.007 0.010
Inches Typ. Max. 0.069 0.010 0.065 0.033 0.019 0.010 0.020 0.197 0.244 0.050 0.150 0.157 0.050 0.024
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. (c) The ST logo is a registered trademark of STMicroelectronics (c) 2001 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom (c) http://www.st.com
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