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LF151 LF251 - LF351
WIDE BANDWIDTH SINGLE J-FET OPERATIONAL AMPLIFIER
.I .LOWPOWERCONSUMPTI .WI .LOWI .OUTPUTSHORT.HI .I .LATCHUPFREEOPERATI .HI
DESCRIPTION
NTERNALLY ADJUSTABLE INPUT OFFSET VOLTAGE ON DE COMMON-MODE (UP TO VCC+) AND DIFFERENTIAL VOLTAGE RANGE NPUT BIAS AND OFFSET CURRENT CIRCUIT PROTECTION GH INPUT IMPEDANCE J-FET INPUT STAGE NTERNAL FREQUENCY COMPENSATION ON GH SLEW RATE : 16V/s (typ)
N DIP8 (Plastic Package)
D SO8 (Plastic Micropackage)
These circuits are high speed J-FET input single operationalamplifiers incorporatingwell matched,high voltage J-FET and bipolar transistors in a monolithic integrated circuit. The devicesfeaturehigh slew rates, low input bias and offset currents, and low offset voltage temperature coefficient. PIN CONNECTIONS (top view)
ORDER CODES
Part Number LF351 LF251 LF151 Temperature 0 C, +70 C -40oC, +105oC -55 C, +125 C
o o o o
Package N * * * D * * *
1 2 3 4
8 7 6 5
1 2 3 4 5 6 7 8
- Offset Null 1 - Inverting input - Non-inverting input - VCC- Offset Null 2 - Output - VCC+ - N.C.
October 1997
1/9
LF151 - LF251 - LF351
SCHEMATIC DIAGRAM
VCC
input Non-inverting Inveinput rting 100 200 Output 100 30k
8.2k
1.3k VCC Offse t Null1
35k
1.3k
35k
100
Offse t Null2
INPUT OFFSET VOLTAGE NULL CIRCUITS
LF35 1
N1
N2 10 0k VCC
ABSOLUTE MAXIMUM RATINGS
Symbol VCC Vi Vid Ptot Toper Supply Voltage - (note 1) Input Voltage - (note 3) Differential Input Voltage - (note 2) Power Dissipation Output Short-circuit Duration - (note 4) Operating Free Air Temperature Range LF351 LF251 LF151 Parameter Value 18 15 30 680 Infinite 0 to 70 -40 to 105 -55 to 125 -65 to 150
o
Unit V V V mW C
Tstg
Notes :
Storage Temperature Range
o
C
1. 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-. 2. Differential voltages are at the non-inverting input terminal with respect to the inverting input terminal. 3. The magnitude of the input voltage must never exceed the magnitude of the supply voltage or 15 volts, whichever is less. 4. 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 = 25oC (unless otherwise specified)
Symbol Vio Parameter Input Offset Voltage (R S = 10k) o Tamb = 25 C Tmin. Tamb Tmax. Input Offset Voltage Drift Input Offset Current * Tamb = 25oC Tmin. Tamb Tmax. Input Bias Current * o Tamb = 25 C Tmin. Tamb Tmax. Large Signal Voltage Gain (RL = 2k, VO = 10V) o Tamb = 25 C Tmin. Tamb Tmax. Supply Voltage Rejection Ratio (R S = 10k) o Tamb = 25 C Tmin. Tamb Tmax. Supply Current (no load) o Tamb = 25 C Tmin. Tamb Tmax. Input Common Mode Voltage Range Common Mode Rejection Ratio (RS = 10k) o Tamb = 25 C Tmin. Tamb Tmax. Output Short-circuit Current o Tamb = 25 C Tmin. Tamb Tmax. Output Voltage Swing Tamb = 25oC Tmin. Tamb Tmax. SR tr KOV GBP Ri THD en m RL RL RL RL = = = = 2k 10k 2k 10k 11 50 25 80 80 LF151 - LF251 - LF351 Min. Typ. 3 10 5 100 4 200 20 Max. 10 13 V/oC pA nA pA nA V/mV 200 dB 86 mA 1.4 +15 -12 86 mA 10 10 10 12 10 12 12 40 60 60 V 12 13.5 3.4 3.4 V dB 70 70 Unit mV
DV io Iio
Iib
20
Avd
SVR
ICC
Vicm CMR
Ios VOPP
Slew Rate (Vi = 10V, R L = 2k, C L = 100pF, T amb = 25oC, unity gain) Rise Time o (Vi = 20mV, RL = 2k, CL = 100pF, Tamb = 25 C, unity gain) Overshoot o (Vi = 20mV, RL = 2k, CL = 100pF, Tamb = 25 C, unity gain) Gain Bandwidth Product o (f = 100kHz, Tamb = 25 C, V in = 10mV, RL = 2k, CL = 100pF) Input Resistance Total Harmonic Distortion (f = 1kHz, AV = 20dB, R L = 2k, o CL = 100pF, Tamb = 25 C, VO = 2VPP) Equivalent Input Noise Voltage (f = 1kHz, Rs = 100) Phase Margin
V/s 16 0.1 10 MHz 2.5 4 1012 0.01 15 45 nV Hz Degrees % s %
* The input bias currents are junction leakage currents which approximately double for every 10oC increase in the junction temperature.
3/9
LF151 - LF251 - LF351
MAXIMUM PEAK-TO-PEAK OUTPUT VOLTAGE VERSUS FREQUENCY
MAXIMUMPEAK-TO-PEAK OUTPUT VOLTAGE (V)
MAXIMUM PEAK-TO-PEAK OUTPUT VOLTAGE VERSUS FREQUENCY
MAXIMUMPEAK-TO-PEAK OUTPUT VOLTAGE (V)
30 VCC = 15V 25 20 VCC = 10V 15 10 5 0 100 1K 10K 100K 1M 10M VCC = 5V
R L= 2k Tamb = +25 C See Figure 2
30 25 20 15 10 5 0 100 1K 10K 100K
VCC =
5V
V CC = 15V V CC = 10V
R L= 10k T amb = +25 C S e e F igure 2
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
MAXIMUM PEAK-TO-PEAK OUTPUT VOLTAGE VERSUS FREQUENCY
MAXIMUMPEAK-TO-PEAK OUTPUT VOLTAGE (V)
MAXIMUM PEAK-TO-PEAK OUTPUT VOLTAGE VERSUS FREE AIR TEMP.
30
MAXIMUMPEAK-TO-PEAK OUTPUT VOLTAGE (V)
30 25 20
Tamb = +25 C
25 20 15
VCC =
15V
R L = 2k Se e Figure 2
R
15 10 5 0 -75 -50 -25 0 25 50
L L
= 10k
Ta mb = -55 C
10 5 0
R
= 2k
V CC =
15V
Ta mb = +125 C 10k 40k 100k 400k 1M 4M 10M
S e e Figu re 2 75 -50 125
TEMPER ATURE ( C)
FREQUENCY (Hz)
MAXIMUM PEAK-TO-PEAK OUTPUT VOLTAGE VERSUS LOAD RESISTANCE
MAXIMUM PEAK-TO-PEAK OUTPUT VOLTAGE VERSUS SUPPLY VOLTAGE
MAXIMUMPEAK-TO-PEAK OUTPUT VOLTAGE (V)
MAXIMUMPEAK-TO-PEAK OUTPUT VOLTAGE (V)
30 25 20 15 10 5 0 0.1 0.2 0.4 0.7 1 2 4 7 10
S e e Figu re 2
VCC= 15V Ta mb= +25 C
30 25 20 15 10 5 0 2 4 6 8 10 12 14 16 R L = 10 k Ta mb = +25 C
LOAD RESISTANCE (k)
S UPP LY VOLTAGE (V)
4/9
LF151 - LF251 - LF351
INPUT BIAS CURRENT VERSUS FREE AIR TEMPERATURE LARGE SIGNAL DIFFERENTIAL VOLTAGE AMPLIFICATION VERSUS FREE AIR TEMPERATURE
INPUT BIAS CURRENT (nA)
1 00
DIFFERENTIAL VOLTAGE AMPLIFICATION (V/V)
1000
VCC = 10 1 0 .1
1 5V
400 200 100 40 20 10 4 2 1
VCC = 15V VO = 10V R L = 2k -75 -50 -25 0 25 50 75 100 125
0 .01 -50
-25
0
25
50
75
10 0
125
TEMPERATURE ( C)
TEMPERATURE ( C )
LARGE SIGNAL DIFFERENTIAL VOLTAGE AMPLIFICATION AND PHASE SHIFT VERSUS FREQUENCY
TOTAL POWER DISSIPATION VERSUS FREE AIR TEMPERATURE
TOTAL POWER DISSIPATION (mV)
100
P HASE S HIFT (right sca le)
DIFFERENTIAL VOLTAGE AMPLIFICATION (le ft s ca le )
180
10
1 100
R L = 2k C L = 100pF V CC = 15V T a mb = +125 C
1K 10K 100K 1M 10M FREQUENCY (Hz)
90
0
250 225 V CC +/-15V 200 No s igna l No loa d 175 150 100 75 50 25 0 -75 -50 -25 0
DIFFERENTIAL VOLTAGE AMPLIFICATION(V/V)
25
50
75
100 125
TEMPERATURE ( C)
SUPPLY CURRENT PER AMPLIFIER VERSUS FREE AIR TEMPERATURE
2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 -75 -50
SUPPLY CURRENT PER AMPLIFIER VERSUS SUPPLY VOLTAGE
2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 0
-25
0
25
50
75
10 0 125
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
VCC = 15V No signa l No loa d
Ta mb= +25 C No s igna l No load
2
4
6
8
10
12
14
16
TEMPERATURE ( C)
SUPPLY VOLTAGE (V)
5/9
LF151 - LF251 - LF351
COMMON MODE REJECTION RATIO VERSUS FREE AIR TEMPERATURE
COMMON MODE MODE REJECTION RATIO (dB)
VOLTAGE FOLLOWER LARGE SIGNAL PULSE RESPONSE
INPUT AND OUTPUT VOLTAGES (V)
89 88 87 86 85 84 83 -75 -50 -25 0 25 50 75 100 125
R L = 10 k VCC = 15V
6 4 2 0 -2 -4 -6 0
VCC = 15V R L = 2 k C L= 100pF Ta mb = +25 C
OUTPUT INPUT
0.5
1
1.5
2
2.5
3
3.5
TEMPERATURE ( C)
TIME (s )
OUTPUT VOLTAGE VERSUS ELAPSED TIME
28 24
OVERSHOOT
EQUIVALENT INPUT NOISE VOLTAGE VERSUS FREQUENCY
EQUIVALENT INPUT NOISE VOLTAGE (nV/VHz)
70 60 50 40 30 20 10 0 10 40 100 400 1k 4k 10k 40k 100k FREQUENCY (Hz) VCC = 15V A V = 10 R S = 100 Ta mb = +25 C
OUTPUT VOLTAGE (mV)
20 16 12 8 4 0
-4
10%
90%
tr 0
TIME (s )
VCC= 15V R L= 2k T mb = +25 C a
0.5 0.6 0.7
0.1 0.2 0.3 0.4
TOTAL HARMONIC DISTORTION VERSUS FREQUENCY
TOTAL HARMONIC DISTORTION (%)
1 0.4 0.1 0.04 0.01 0.004 0.001 100 VV = = 15V 15V CC CC AV = = 1 AV 1 VV(rms)= = 6V 6V O O (rms) +25 Ta mb = = +25CC Ta mb
400
1k
4k
10k
40k
100k
FREQUE NCY (Hz)
6/9
LF151 - LF251 - LF351
PARAMETER MEASUREMENT INFORMATION Figure 1 : Voltage Follower Figure 2 : Gain-of-10 Inverting Amplifier
10k
LF351
eI
1k
LF351
eo
eo
L
eI
CL= 100pF
RL = 2k
CL= 100pF
TYPICAL APPLICATION (0.5Hz) SQUARE WAVE OSCILLATOR
R F = 100k
3.3k
-
+15V
LF351
1k
C F = 3.3 F -15V 3.3k
9.1k
f osc =
1 2 x R F CF
HIGH Q NOTCH FILTER
LF351
R1
R2 C3 R3
fo =
1 = 1kHz 2 x R C1 1
C3 C1 = C2 = = 100pF 2 R1 = R2 = 2R3 = 1.5M
C1
C2
7/9
LF151 - LF251 - LF351
PACKAGE MECHANICAL DATA 8 PINS - PLASTIC DIP
Dimensions A a1 B b b1 D E e e3 e4 F i L Z
Min. 0.51 1.15 0.356 0.204 7.95
Millimeters Typ. 3.32
Max.
Min. 0.020 0.045 0.014 0.008 0.313
Inches Typ. 0.131
Max.
1.65 0.55 0.304 10.92 9.75 2.54 7.62 7.62 6.6 5.08 3.81 1.52
0.065 0.022 0.012 0.430 0.384 0.100 0.300 0.300 0260 0.200 0.150 0.060
3.18
0.125
8/9
DIP8.TBL
PM-DIP8.EPS
LF151 - LF251 - LF351
PACKAGE MECHANICAL DATA 8 PINS - PLASTIC MICROPACKAGE (SO)
Dimensions A a1 a2 a3 b b1 C c1 D E e e3 F L M S
Min. 0.1 0.65 0.35 0.19 0.25 4.8 5.8
Millimeters Typ.
Max. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 45 (typ.) 5.0 6.2
o
Min. 0.004 0.026 0.014 0.007 0.010 0.189 0.228
Inches Typ.
Max. 0.069 0.010 0.065 0.033 0.019 0.010 0.020 0.197 0.244
1.27 3.81 3.8 0.4 4.0 1.27 0.6 8 (max.)
o
0.050 0.150 0.150 0.016 0.157 0.050 0.024
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics 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 SGS-THOMSON Microelectronics. Specifications mentioned in this publ ication are subject to change without notice. This pub lication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics.
ORDER CODE :
(c) 1997 SGS-THOMSON Microelectronics - Printed in Italy - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdo m - U.S.A.
9/9
SO8.TBL
PM-SO8.EPS

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