Features: Internally trimmed offset voltage 5.0 mV (max)
Low input bias current 50 pA (typ)
Low input noise current 0.01 pA/Hz (typ)
Wide gain bandwidth 4 MHz (typ)
High slew rate 13 V/s (typ)
Low supply current 3.4 mA (max)
High input impedance 1012 (typ)
Low total harmonic distortion AV= 10, 0.02% (typ)
RL = 10k, VO= 20 Vp-p, f = 20 Hz-20 kHz
Low 1/f noise corner 50 Hz (typ)
Fast settling time to 0.01% 2 s (typ)ApplicationThe LF451CM is an op amp with an internally trimmed input offset voltage and JFET input devices (BI-FET II). These JFETs have large reverse breakdown voltages from gate to source and drain eliminating the need for clamps across the inputs. Therefore, large differential input voltages can easily be accommodated without a large increase in input current. The maximum differential input voltage is independent of the supply voltages. However, neither of the input voltages
should be allowed to exceed the negative supply as this willcause large currents to flow which can result in a destroyed unit.
Exceeding the negative common-mode limit with the non-inverting input, or with both inputs, will force the output to a high state, potentially causing a reversal of phase to the output.
In neither case does a latch occur since raising the input back within the common-mode range again puts the input nstage and thus the amplifier in a normal operating mode.
SpecificationsSupply Voltage (V+ - V-) 36V
Input Voltage Range V- s VIN s V+
Differential Input Voltage (Note 2) ±30V
Junction Temperature (TJ MAX) 150
Output Short Circuit Duration Continuous
Power Dissipation (Note 3) 500 mW
ESD Tolerance TBD
Soldering Information (Note 5)
SO Package: Vapor Phase (60 sec) 215
Infrared (15 sec) 220
DescriptionThe LF451 is a low-cost high-speed JFET-input operational amplifier with an internally trimmed input offset voltage (BIFET IITM technology). The device requires a low supply current and yet maintains a large gain bandwidth product and a fast slew rate. In addition, well matched high voltage JFET input devices provide very low input bias and offset currents. The LF451 is pin compatible with the standard LM741, allowing designers to upgrade the overall performance of existing designs.
The LF451 may be used in such applications as high-speed integrators, fast D/A converters, sample-and-hold circuits and many other circuits requiring low input bias current, high input impedance, high slew rate and wide bandwidth.
LF451 Data Sheet
