LF147 - LF247
LF347
WIDE BANDWIDTH QUAD J-FET OPERATIONAL AMPLIFIERS
■LOW POWER CONSUMPTION
■WIDE COMMON-MODE (UP TO VCC+) AND DIFFERENTIAL VOLTAGE RANGE
■LOW INPUT BIAS AND OFFSET CURRENT
■OUTPUT SHORT-CIRCUIT PROTECTION
■HIGH INPUT IMPEDANCE J–FET INPUT STAGE
■INTERNAL FREQUENCY COMPENSATION
■LATCH UP FREE OPERATION
■HIGH SLEW RATE : 16V/μs (typ)
N
DIP14
(Plastic Package)
D
SO14
(Plastic Micropackage)
DESCRIPTION
These circuits are high speed J–FET input quad operational 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
Part Number |
Temperature Range |
Package |
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N |
D |
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LF147 |
-55°C, +125°C |
∙ |
∙ |
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LF247 |
-40°C, +105°C |
∙ |
∙ |
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LF347 |
0°C, +70°C |
∙ |
∙ |
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Example : LF347IN
N = Dual in Line Package (DIP)
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
Output 1 |
1 |
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14 |
Output 4 |
Inverting Input 1 |
2 |
- |
- |
13 |
Inverting Input 4 |
Non-inverting Input 1 |
3 |
+ |
+ |
12 |
Non-inverting Input 4 |
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VCC + |
4 |
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11 |
VCC - |
Non-inverting Input 2 |
5 |
+ |
+ |
10 |
Non-inverting Input 3 |
Inverting Input 2 |
6 |
- |
- |
9 |
Inverting Input 3 |
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Output 2 |
7 |
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8 |
Output 3 |
March 2001 |
1/10 |
LF147 - LF247 - LF347
SCHEMATIC DIAGRAM (each amplifier)
VCC
Non-inverting input
Inverting input
100 200
Output
100
30k
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100 |
8.2k |
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1.3k |
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1.3k |
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35k |
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35k |
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VCC |
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ABSOLUTE MAXIMUM RATINGS |
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Symbol |
Parameter |
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LF147 |
LF247 |
LF347 |
Unit |
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VCC |
Supply voltage - note 1) |
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±18 |
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V |
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Vi |
Input Voltage - note 2) |
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±15 |
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V |
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Vid |
Differential Input Voltage - note 3) |
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±30 |
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V |
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Ptot |
Power Dissipation |
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680 |
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mW |
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Output Short-circuit Duration - note 4) |
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Infinite |
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Toper |
Operating Free-air Temperature Range |
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-55 to +125 |
-40 to +105 |
0 to +70 |
°C |
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Tstg |
Storage Temperature Range |
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-65 to +150 |
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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.The magnitude of the input voltage must never exceed the magnitude of the supply voltage or 15 volts, whichever is less.
3.Differential voltages are the non-inverting input terminal with respect to the inverting input terminal.
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
2/10
LF147 - LF247 - LF347
ELECTRICAL CHARACTERISTICS
VCC = ±15V, Tamb = +25°C (unless otherwise specified)
Symbol |
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Parameter |
Min. |
Typ. |
Max. |
Unit |
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Input Offset Voltage (Rs = 10kΩ) |
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mV |
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Vio |
Tamb = 25°C |
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3 |
10 |
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Tmin ≤ Tamb |
≤ Tmax |
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13 |
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DVio |
Input Offset Voltage Drift |
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10 |
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μV/°C |
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Iio |
Input Offset Current - note 1) |
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Tamb = 25°C |
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5 |
100 |
pA |
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Tmin ≤ Tamb |
≤ Tmax |
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4 |
nA |
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Input Bias Current |
- note 1 |
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Iib |
Tamb = 25°C |
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20 |
200 |
pA |
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Tmin ≤ Tamb |
≤ Tmax |
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20 |
nA |
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Large Signal Voltage Gain |
(RL = 2kΩ, Vo = ±10V) , |
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V/mV |
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Avd |
Tamb = 25°C |
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50 |
200 |
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Tmin ≤ Tamb |
≤ Tmax |
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25 |
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Supply Voltage Rejection Ratio (RS = 10kΩ) |
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dB |
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SVR |
Tamb = 25°C |
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80 |
86 |
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Tmin ≤ Tamb |
≤ Tmax |
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80 |
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Supply Current, Per Amp, no Load |
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mA |
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ICC |
Tamb = 25°C |
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1.4 |
2.7 |
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Tmin ≤ Tamb |
≤ Tmax |
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2.7 |
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Vicm |
Input Common Mode Voltage Range |
±11 |
+15 |
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V |
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-12 |
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Common Mode Rejection Ratio (RS = 10kΩ) |
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dB |
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CMR |
Tamb = 25°C |
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70 |
86 |
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Tmin ≤ Tamb |
≤ Tmax |
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70 |
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Output Short-Circuit Current |
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mA |
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IOS |
Tamb = 25°C |
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10 |
40 |
60 |
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Tmin ≤ Tamb |
≤ Tmax |
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10 |
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60 |
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Output Voltage Swing |
R L = 2kΩ |
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V |
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Tamb = 25°C |
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10 |
12 |
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±Vopp |
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RL = 10kΩ |
12 |
13.5 |
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Tmin ≤ Tamb |
≤ Tmax |
RL = 2kΩ |
10 |
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RL = 10kΩ |
12 |
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SR |
Slew Rate |
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V/μs |
Vi = 10V, RL = 2kΩ, CL = 100pF, Tamb = 25°C, unity gain |
12 |
16 |
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tr |
Rise Time |
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μs |
Vi = 20mV, RL = 2kΩ,CL = 100pF, Tamb = 25°C, unity gain |
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0.1 |
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Kov |
Overshoot |
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% |
Vi = 20mV, RL = 2kΩ, CL = 100pF, Tamb = 25°C, unity gain |
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10 |
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GBP |
Gain Bandwidth Product |
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MHz |
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f =100kHz, Tamb = 25°C, V in = 10mV, RL =2kΩ, CL = 100pF |
2.5 |
4 |
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Ri |
Input Resistance |
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1012 |
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Ω |
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Total Harmonic Distortion |
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% |
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THD |
f =1kHz, Av = 20dB, RL = 2kΩ, CL = 100pF |
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Tamb = 25°C, V O = 2Vpp |
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0.01 |
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en |
Equivalent Input Noise Voltage (RS = 100Ω, f = 1KHz) |
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15 |
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nV |
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----------- |
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Hz |
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m |
Phase Margin |
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45 |
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Degrees |
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Vo1/Vo2 |
Channel Separation ( Av = 100) |
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120 |
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dB |
1.The input bias currents are junction leakage currents which approximately double for every 10°C increase in the junction temper ature.
3/10