Wide bandwidth dual JFET operational amplifiers
5
Features
■ Low power consumption
■ Wide common-mode (up to V
differential voltage range
■ Low input bias and offset current
■ Output short-circuit protection
■ High input impedance JFET input stage
■ Internal frequency compensation
■ Latch up free operation
■ High slew rate 16 V/µs (typical)
Description
These circuits are high speed JFET input dual
operational amplifiers incorporating well matched,
high voltage JFET and bipolar transistors in a
monolithic integrated circuit.
CC
+
) and
LF253, LF353
N
DIP8
(Plastic package)
D
SO-8
(Plastic micro package)
Pin connections
(top view)
The devices feature high slew rates, low input
bias and offset currents, and low offset voltage
temperature coefficient.
1
2
-
+
3
4
1 - Output1
2 - Inverting input 1
3 - Non-inverting input 1
-
CC
CC
+
4 - V
5 - Non-inverting input 2
6 - Inverting input 2
7 - Output 2
8 - V
+
8
7
6
-
March 2010 Doc ID 2153 Rev 3 1/15
www.st.com
15
Schematics LF253, LF353
1 Schematics
Figure 1. Schematic diagram (each amplifier)
VCC+
Non-inverting
input
Inverting input
100 Ω
100 Ω
30k
200 Ω
Output
VCC-
1.3 k
Offset Null1 Offset Null2
35 k
1.3 k
35 k
8.2 k
100 Ω
2/15 Doc ID 2153 Rev 3
LF253, LF353 Absolute maximum ratings and operating conditions
2 Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings
Symbol Parameter Value Unit
(2)
(1)
(7)
(3)
(6)
(5)
(8)
(4)
CC
(4)
+
and V
CC
±18 V
±15 V
±30 V
125
°C/W
85
40
°C/W
41
Infinite
1kV
200 V
1.5 kV
-
.
V
CC
V
i
V
id
Supply voltage
Input voltage
Differential input voltage
Thermal resistance junction to ambient
R
thja
SO-8
DIP8
Thermal resistance junction to case
R
thjc
SO-8
DIP8
Output short-circuit duration
T
stg
Storage temperature range -65 to +150 °C
HBM: human body model
ESD
MM: machine model
CDM: charged device model
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 V
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. Short-circuits can cause excessive heating and destructive dissipation. Values are typical.
5. 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
6. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a 1.5 kΩ resistor
between two pins of the device. This is done for all couples of connected pin combinations while the other pins are floating.
7. Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between two pins of the
device with no external series resistor (internal resistor < 5 Ω). This is done for all couples of connected pin combinations
while the other pins are floating.
8. Charged device model: all pins and the package are charged together to the specified voltage and then discharged directly
to the ground through only one pin. This is done for all pins.
Table 2. Operating conditions
Symbol Parameter LF253 LF353 Unit
T
V
CC
oper
Supply voltage 6 to 36 V
Operating free-air temperature range -40 to +105 0 to +70 °C
Doc ID 2153 Rev 3 3/15
Electrical characteristics LF253, LF353
3 Electrical characteristics
Table 3. Electrical characteristics at VCC = ±15 V, T
= +25°C (unless otherwise specified)
amb
Symbol Parameter Min. Typ. Max. Unit
V
io
DV
I
io
I
ib
A
vd
SVR
I
CC
V
icm
CMR
I
OS
Input offset voltage (Rs = 10kΩ)
≤ T
≤ T
≤ T
amb
amb
amb
≤ T
≤ T
≤ T
max
max
(1)
max
(1)
T
min
Input offset voltage drift 10 µV/°C
io
Input offset current
T
min
Input bias current
T
min
Large signal voltage gain (RL = 2kΩ, Vo = ±10V)
≤ T
T
min
amb
≤ T
max
Supply voltage rejection ratio (RS = 10kΩ)
≤ T
T
min
amb
≤ T
max
Supply current, no load
≤ T
T
min
amb
≤ T
max
Input common mode voltage range
Common mode rejection ratio (R
≤ T
T
min
amb
≤ T
max
= 10kΩ)
S
Output short-circuit current
T
≤ T
amb
≤ T
max
min
310
5 100
20 200
5025200
808086
1.4 3.2
±11 +15
-12
707086
101040 60
13
4
20
V/mV
3.2
60
Output voltage swing
= 2kΩ
R
L
±V
opp
RL = 10kΩ
≤ T
T
min
amb
≤ T
max
RL = 2kΩ
R
= 10kΩ
L
SR Slew rate, V
t
Rise time, Vi = 20mV, RL = 2kΩ, CL = 100pF, unity gain 0.1 µs
r
K
Overshoot, Vi = 20mV, RL = 2kΩ, CL = 100pF, unity gain 10 %
ov
= 10V, RL = 2kΩ, CL = 100pF, unity gain 12 16 V/µs
i
GBP Gain bandwidth product, f = 100kHz, V
R
Input resistance 10
i
THD
Total harmonic distortion, f= 1kHz, A
Vo= 2V
pp
Equivalent input noise voltage
e
n
= 100Ω, f = 1KHz
R
S
= 10mV, RL = 2kΩ, CL = 100pF 2.5 4 MHz
in
= 20dB, RL= 2kΩ, CL=100pF,
v
10
12
12
13.5
10
12
12
0.01 %
15
∅m Phase margin 45 Degrees
V
o1/Vo2
1. The input bias currents are junction leakage currents which approximately double for every 10°C increase in the junction
temperature.
Channel separation (Av = 100) 120 dB
mV
pA
nA
pA
nA
dB
mA
V
dB
mA
V
Ω
nV
-----------Hz
4/15 Doc ID 2153 Rev 3
LF253, LF353 Electrical characteristics
Figure 2. Maximum peak-to-peak output
voltage vs. frequency, R
VCC = +/- 15 V
= +/- 10 V
V
CC
= +/- 5 V
V
CC
R
L
T
amb
L
= 2 kΩ
= +25°C
= 2 kΩ
Figure 4. Maximum peak-to-peak output
voltage versus frequency
= +25°C
T
amb
VCC = +/- 15 V
= 2 kΩ
R
L
Figure 3. Maximum peak-to-peak output
voltage vs. frequency, RL = 10 kΩ
= 10 kΩ
R
L
T
VCC = +/- 15 V
V
= +/- 10 V
CC
V
CC
= +/- 5 V
= +25°C
amb
Figure 5. Maximum peak-to-peak output
voltage versus free air temperature
= -55°C
T
amb
= +125°C
T
amb
Figure 6. Maximum peak-to-peak output
voltage versus load resistance
VCC = +/- 15 V
= +25°C
T
amb
LOAD RESISTANCE (kΩ)
R
= 10 kΩ
L
R
= 2 kΩ
L
VCC = +/- 15 V
Figure 7. Maximum peak-to-peak output
voltage versus supply voltage
RL = 10 kΩ
= +25°C
T
amb
Doc ID 2153 Rev 3 5/15
Electrical characteristics LF253, LF353
Figure 8. Input bias current versus free air
temperature
VCC = +/- 15 V
Figure 10. Large signal differential voltage
amplification and phase shift
versus frequency
Differential
Phase shift
(right scale)
voltage
amplification
(left scale)
Figure 9. Large signal differential voltage
amplification versus free air temp.
VCC = +/- 15 V
= +/- 10 V
V
O
R
= 2 kΩ
L
Figure 11. Total power dissipation versus free
air temperature
VCC = +/- 15 V
No signal
no load
= 2 kΩ
R
L
C
= 100 pF
L
VCC = +/- 15 V
T
= +125°C
amb
Figure 12. Supply current per amplifier versus
free air temperature
VCC = +/- 15 V
No signal
no load
Figure 13. Supply current per amplifier versus
supply voltage
T
= +25°C
amb
No signal
no load
6/15 Doc ID 2153 Rev 3
LF253, LF353 Electrical characteristics
Figure 14. Common mode rejection ratio
versus free air temperature
= 10 kΩ
R
L
VCC = +/- 15 V
Figure 15. Voltage follower large signal pulse
response
OUTPUT
INPUT
VCC = +/- 15 V
R
= 2 kΩ
L
C
= 100 pF
L
= +25°C
T
amb
μs
Figure 16. Output voltage versus elapsed time Figure 17. Equivalent input noise voltage
versus frequency
OVER SHOOT
VCC = +/- 15 V
A
= 10
V
R
= 100 Ω
S
= +25°C
T
amb
VCC = +/- 15 V
R
= 2 kΩ
L
T
= +25°C
t
r
amb
μs
Figure 18. Total harmonic distortion versus
frequency
VCC = +/- 15 V
= 1
A
V
Vo( rm s) = 6 V
= +25°C
T
amb
Doc ID 2153 Rev 3 7/15
Parameter measurement information LF253, LF353
4 Parameter measurement information
Figure 19. Voltage follower Figure 20. Gain of 10 inverting amplifier
10 kΩ
1 kΩ
e
1/2
LF253
e
I
= 100 pF
C
L
RL = 2 kΩ
e
O
I
1/2
LF253
R
L
e
O
= 100 pF
C
L
8/15 Doc ID 2153 Rev 3
LF253, LF353 Typical application
5 Typical application
Figure 21. Quadruple oscillator
Doc ID 2153 Rev 3 9/15
Package information LF253, LF353
6 Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
10/15 Doc ID 2153 Rev 3
LF253, LF353 Package information
6.1 DIP8 package information
Figure 22. DIP8 package mechanical drawing
Table 4. DIP8 package mechanical data
Dimensions
Ref.
Min. Typ. Max. Min. Typ. Max.
A5.330.210
A1 0.38 0.015
A2 2.92 3.30 4.95 0.115 0.130 0.195
b 0.36 0.46 0.56 0.014 0.018 0.022
b2 1.14 1.52 1.78 0.045 0.060 0.070
c 0.20 0.25 0.36 0.008 0.010 0.014
D 9.02 9.27 10.16 0.355 0.365 0.400
E 7.62 7.87 8.26 0.300 0.310 0.325
E1 6.10 6.35 7.11 0.240 0.250 0.280
e 2.54 0.100
eA 7.62 0.300
eB 10.92 0.430
L 2.92 3.30 3.81 0.115 0.130 0.150
Millimeters Inches
Doc ID 2153 Rev 3 11/15
Package information LF253, LF353
6.2 SO-8 package information
Figure 23. SO-8 package mechanical drawing
Table 5. SO-8 package mechanical data
Dimensions
Ref.
Min. Typ. Max. Min. Typ. Max.
A1.750.069
A1 0.10 0.25 0.004 0.010
A2 1.25 0.049
b 0.28 0.48 0.011 0.019
c 0.17 0.23 0.007 0.010
D 4.80 4.90 5.00 0.189 0.193 0.197
E 5.80 6.00 6.20 0.228 0.236 0.244
E1 3.80 3.90 4.00 0.150 0.154 0.157
e 1.27 0.050
h 0.25 0.50 0.010 0.020
L 0.40 1.27 0.016 0.050
L1 1.04 0.040
k1° 8°1° 8°
ccc 0.10 0.004
Millimeters Inches
12/15 Doc ID 2153 Rev 3
LF253, LF353 Ordering information
7 Ordering information
Table 6. Order codes
Order code
LF253N
LF253D
LF253DT
LF353N
LF353D
LF353DT
Temperature
range
-40°C, +105°C
0°C, +70°C
Package Packing Marking
DIP8 Tube LF253N
SO-8
DIP8 Tube LF353N
SO-8
Tu b e o r
Tape & reel
Tu b e o r
Tape & reel
253
353
Doc ID 2153 Rev 3 13/15
Revision history LF253, LF353
8 Revision history
Table 7. Document revision history
Date Revision Changes
01-Mar-2001 1 Initial release.
Updated document format.
Removed information concerning military temperature range
08-Sep-2008 2
25-Mar-2010 3
(LF153).
Added L1 parameter dimensions in Table 5: SO-8 package
mechanical data.
Corrected error in Table 6: Order codes: LF253N, LF253D, LF353N
and LF353D proposed in tube packing.
14/15 Doc ID 2153 Rev 3
LF253, LF353
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Doc ID 2153 Rev 3 15/15
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