STMicroelectronics LF257
This amplifiers feature low input bias and offset currents, low input offset voltage and input offset voltage drift,coupledwith offsetadjust which doesnot degrade drift or common-mode rejection. The devices are also designed for high slew rate, wide bandwidth,extremelyfastsettlingtime, lowvoltageand current noise and a low 1/f noise level.TYPICAL APPLICATIONS
PRECISION HIGH SPEED INTEGRATORS FAST D/A AND CONVERTERS HIGH IMPEDANCE BUFFERS WIDEBAND, LOW NOISE, LOW DRIFT AMPLIFIERS LOGARITHIMIC AMPLIFIERS PHOTOCELL AMPLIFIERS SAMPLE AND HOLD CIRCUITS ORDER CODES Part Number LF355, LF356, LF357 LF255, LF256, LF257 LF155, LF156, LF157 Example : LF355N Temperature Range 0 C, +70 C –40oC, +105oC –55 C, +125 C o o o o Package N●
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DESCRIPTION
These circuits are monolithic J-FET input operational amplifiers incorporating well matched, high voltage J-FET on the same chip with standard bipolar transistors. July 1998 8 7 6 5 1 2 3 4 - Offset Null 1 - Inverting input - Non-inverting input - VCC5 6 7 8 Offset Null 2 Output + VCC N.C. 2 3 4 1/14 LF155 - LF156 - LF157 SCHEMATIC DIAGRAM V i o ADJUSTMENTABSOLUTE MAXIMUM RATINGS
Symbol VCC Vi Vid Ptot Toper Supply Voltage Input Voltage - (note 1) Differential Input Voltage Power Dissipation Output Short-circuit Duration Operating Free Air Temperatu...