LF442QML中文资料德州仪器数据手册PDF规格书

FEATURES

• 1/10 Supply Current of a LM1458: 400 μA (Max)

• Low Input Bias Current: 50 pA (Typ)

• Low Input Offset Voltage: 1 mV (Typ)

• Low Input Offset Voltage Drift: 7 μV/°C (Typ)

• High Gain Bandwidth: 1 MHz (Typ)

• High Slew Rate: 1 V/μs (Typ)

• Low Noise Voltage for Low Power: 35 nV/√Hz

(Typ)

• Low Input Noise Current: 0.01 pA/√Hz (Typ)

• High Input Impedance: 1012Ω

DESCRIPTION

The LF442 dual low power operational amplifier

provides many of the same AC characteristics as the

industry standard LM1458 while greatly improving the

DC characteristics of the LM1458. The amplifier has

the same bandwidth, slew rate, and gain (10 kΩ load)

as the LM1458 and only draws one tenth the supply current of the LM1458. In addition the well matched

high voltage JFET input devices of the LF442 reduce

the input bias and offset currents by a factor of

10,000 over the LM1458. A combination of careful

layout design and internal trimming ensures very low input offset voltage and voltage drift. The LF442 also

has a very low equivalent input noise voltage for a

low power amplifier.

The LF442 is pin compatible with the LM1458

allowing an immediate 10 times reduction in power

drain in many applications. The LF442 should be

used where low power dissipation and good electrical

characteristics are the major considerations.