Wide bandwidth dual JFET operational amplifiers
Low power consumption
CC
Wide common-mode (up to V differential voltage range
+) and
N DIP8
(Plastic package)
Low input bias and offset current
Output short-circuit protection
High input impedance JFET input stage
Internal frequency compensation
Latch up free operation
D SO-8
(Plastic micro package)
Pin connections
(top view)
High slew rate 16 V/µs (typical)
These circuits are high speed JFET input dual operational amplifiers incorporating well matched, high voltage JFET and bipolar transistors in a monolithic integrated circuit.
8
1
The devices feature high slew rates, low input bias and offset currents, and low offset voltage temperature coefficient.
2
7
3
+
6
4
+
5
- Output1
- Inverting input 1
- Non-inverting input 1
- VCC-
- Non-inverting input 2
- Inverting input 2
- Output 2
- VCC+
March 2010 Doc ID 2153 Rev 3 1/15
Figure 1. Schematic diagram (each amplifier)
VCC+
Non-inverting
input
Inverting input
100 Ω
200 Ω
Output
30k
100 Ω
8.2 k
1.3 k
35 k
1.3 k
35 k 100 Ω
VCC-
Offset Null1
Offset Null2
Table 1. Absolute maximum ratings
Symbol | Parameter | Value | Unit |
VCC | Supply voltage(1) | ±18 | V |
Vi | Input voltage(2) | ±15 | V |
Vid | Differential input voltage(3) | ±30 | V |
Rthja | Thermal resistance junction to ambient(4) SO-8 DIP8 | 125 85 | °C/W |
Rthjc | Thermal resistance junction to case(4) SO-8 DIP8 | 40 41 | °C/W |
Output short-circuit duration(5) | Infinite | ||
Tstg | Storage temperature range | -65 to +150 | °C |
ESD | HBM: human body model(6) | 1 | kV |
MM: machine model(7) | 200 | V | |
CDM: charged device model(8) | 1.5 | kV |
All voltage values, except differential voltage, are with respect to the zero reference level (ground) of the supply voltages
CC
.
CC
where the zero reference level is the midpoint between V + and V -
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.
Short-circuits can cause excessive heating and destructive dissipation. Values are typical.
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
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.
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.
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.
Symbol | Parameter | LF253 | LF353 | Unit |
VCC | Supply voltage | 6 to 36 | V | |
Toper | Operating free-air temperature range | -40 to +105 | 0 to +70 | °C |
Doc ID 2153 Rev 3 3/15
Table 3. Electrical characteristics at VCC = ±15 V, Tamb = +25°C (unless otherwise specified)
Symbol | Parameter | Min. | Typ. | Max. | Unit |
Vio | Input offset voltage (Rs 10kΩ) Tmin Tamb Tmax | 3 | 10 13 | mV | |
DVio | Input offset voltage drift | 10 | µV/°C | ||
Iio | Input offset current (1) Tmin Tamb Tmax | 5 | 100 4 | pA nA | |
Iib | Input bias current (1) Tmin Tamb Tmax | 20 | 200 20 | pA nA | |
Avd | Large signal voltage gain RL = 2kΩ, Vo = ±10V) Tmin Tamb Tmax | 50 25 | 200 | V/mV | |
SVR | Supply voltage rejection ratio (RS 10kΩ Tmin Tamb Tmax | 80 80 | 86 | dB | |
ICC | Supply current, no load Tmin Tamb Tmax | 1.4 | 3.2 3.2 | mA | |
Vicm | Input common mode voltage range | ±11 | +15 -12 | V | |
CMR | Common mode rejection ratio (RS 10kΩ Tmin Tamb Tmax | 70 70 | 86 | dB | |
IOS | Output short-circuit current Tmin Tamb Tmax | 10 10 | 40 | 60 60 | mA |
±Vopp | Output voltage swing RL = 2kΩ RL = 10kΩ Tmin Tamb Tmax RL = 2kΩ RL = 10kΩ | 10 12 10 12 | 12 13.5 | V | |
SR | Slew rate, Vi = 10V, RL = 2kΩ, CL = 100pF, unity gain | 12 | 16 | V/µs | |
tr | Rise time, Vi = 20mV, RL = 2kΩ, CL = 100pF, unity gain | 0.1 | µs | ||
Kov | Overshoot, Vi = 20mV, RL = 2kΩ, CL = 100pF, unity gain | 10 | % | ||
GBP | Gain bandwidth product, f = 100kHz, Vin = 10mV, RL = 2kΩ, CL = 100pF | 2.5 | 4 | MHz | |
Ri | Input resistance | 1012 | Ω | ||
THD | Total harmonic distortion, f= 1kHz, Av= 20dB, RL= 2kΩ CL=100pF, Vo= 2Vpp | 0.01 | % | ||
en | Equivalent input noise voltage RS 100Ω f = 1KHz | 15 | ---n--V----- Hz | ||
m | Phase margin | 45 | Degrees | ||
Vo1/Vo2 | Channel separation (Av = 100) | 120 | dB |
1. The input bias currents are junction leakage currents which approximately double for every 10°C increase in the junction temperature.
4/15 Doc ID 2153 Rev 3
Figure 2. Maximum peak-to-peak output voltage vs. frequency, RL = 2 kΩ
Figure 3. Maximum peak-to-peak output voltage vs. frequency, RL = 10 kΩ
VCC = +/- 15 V | R = 2 kΩ | RL = 10 kΩ | ||
Tamb = +25°C | VCC = +/- 15 V | Tamb = +25°C | ||
VCC = +/- 10 V | VCC = +/- 10 V | |||
VCC = +/- 5 V | VCC = +/- 5 V |
Tamb = -55°C
CC
RL = 2 kΩ
V = +/- 15 V
Tamb = +25°C
Figure 4. Maximum peak-to-peak output voltage versus frequency
Figure 5. Maximum peak-to-peak output voltage versus free air temperature
RL = 10 kΩ RL = 2 kΩ | |||||||||
VCC = +/- 15 V | |||||||||
Tamb = +125°C
Figure 6. Maximum peak-to-peak output voltage versus load resistance
Figure 7. Maximum peak-to-peak output voltage versus supply voltage
VCC = +/- 15 V Tamb = +25°C
RL = 10 kΩ
Tamb = +25°C
LOAD RESISTANCE (kΩ)
Doc ID 2153 Rev 3 5/15
Figure 8. Input bias current versus free air temperature
Figure 9. Large signal differential voltage amplification versus free air temp.
VCC = +/- 15 V
VCC = +/- 15 V VO = +/- 10 V RL = 2 kΩ | |||||||||
VCC = +/- 15 V No signal no load | |||||||
Figure 10. Large signal differential voltage amplification and phase shift versus frequency
Figure 11. Total power dissipation versus free air temperature
Phase shift (right scale)
Differential voltage amplification (left scale)
RL = 2 kΩ CL = 100 pF
VCC = +/- 15 V
Tamb = +125°C
Figure 12. Supply current per amplifier versus free air temperature
Figure 13. Supply current per amplifier versus supply voltage
VCC = +/- 15 V No signal no load | |||||||
Tamb = +25°C No signal no load | |||||||
6/15 Doc ID 2153 Rev 3
Figure 14. Common mode rejection ratio versus free air temperature
Figure 15. Voltage follower large signal pulse response
RL = 10 kΩ | OUTPUT | ||
VCC = +/- 15 V | INPUT | ||
VCC = +/- 15 V | |||
RL = 2 kΩ | |||
CL = 100 pF | |||
Tamb = +25°C | |||
s |
Figure 16. Output voltage versus elapsed time Figure 17. Equivalent input noise voltage
versus frequency
OVER | SHOOT | ||||||||
VCC = +/- 15 V RL = 2 kΩ Tamb = +25°C | |||||||||
tr |
VCC = +/- 15 V AV = 10
RS = 100 Ω
Tamb = +25°C
s
Figure 18. Total harmonic distortion versus frequency
VCC = +/- 15 V AV = 1
Vo(rms) = 6 V Tamb = +25°C
Doc ID 2153 Rev 3 7/15
Figure 19. Voltage follower Figure 20. Gain of 10 inverting amplifier
eI | 1/2 LF253 | CL = 100 pF | RL = 2 kΩ | eO | eI | 1 kΩ | 10 kΩ 1/2 LF253 | RL | eO CL = 100 pF |
8/15 Doc ID 2153 Rev 3
Figure 21. Quadruple oscillator
Doc ID 2153 Rev 3 9/15
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
10/15 Doc ID 2153 Rev 3
Figure 22. DIP8 package mechanical drawing
Table 4. DIP8 package mechanical data
Ref. | Dimensions | |||||
Millimeters | Inches | |||||
Min. | Typ. | Max. | Min. | Typ. | Max. | |
A | 5.33 | 0.210 | ||||
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 |
Doc ID 2153 Rev 3 11/15
Figure 23. SO-8 package mechanical drawing
Table 5. SO-8 package mechanical data
Ref. | Dimensions | |||||
Millimeters | Inches | |||||
Min. | Typ. | Max. | Min. | Typ. | Max. | |
A | 1.75 | 0.069 | ||||
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 | ||||
k | 1° | 8° | 1° | 8° | ||
ccc | 0.10 | 0.004 |
12/15 Doc ID 2153 Rev 3
Order code | Temperature range | Package | Packing | Marking |
LF253N | -40°C, +105°C | DIP8 | Tube | LF253N |
LF253D LF253DT | SO-8 | Tube or Tape & reel | 253 | |
LF353N | 0°C, +70°C | DIP8 | Tube | LF353N |
LF353D LF353DT | SO-8 | Tube or Tape & reel | 353 |
Doc ID 2153 Rev 3 13/15
Table 7. Document revision history
Date | Revision | Changes |
01-Mar-2001 | 1 | Initial release. |
08-Sep-2008 | 2 | Updated document format. Removed information concerning military temperature range (LF153). Added L1 parameter dimensions in Table 5: SO-8 package mechanical data. |
25-Mar-2010 | 3 | Corrected error in Table 6: Order codes: LF253N, LF253D, LF353N and LF353D proposed in tube packing. |
14/15 Doc ID 2153 Rev 3
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Doc ID 2153 Rev 3 15/15
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