Datasheet LF155, LF156, LF256, LF257 LF355, LF356, LF357 (Texas Instruments) - 5

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LF155, LF156 , LF256 , LF257 LF355, LF356 , LF357 www.ti.com
SNOSBH0D – MAY 2000 – REVISED NOVEMBER 2015
6.4 Thermal Information LF155, LF156, LF355, LF357 LF356 D THERMAL METRIC(1) P (PDIP) LMC (TO-99) P (PDIP) UNIT (SOIC) 8 PINS 8 PINS 8 PINS 8 PINS
Junction-to-ambient thermal resistance 130 195 — 55.2 RθJA Still Air — — 160 — °C/W 400 LF/Min Air Flow — — 65 — RθJC(top) Junction-to-case (top) thermal resistance — — 23 44.5 °C/W RθJB Junction-to-board thermal resistance — — — 32.4 °C/W ψJT Junction-to-top characterization parameter — — — 21.7 °C/W ψJB Junction-to-board characterization parameter — — — 32.3 °C/W (1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.
6.5 AC Electrical Characteristics, TA = TJ = 25°C, VS = ±15 V PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
LFx55 5 LF15x: AV = 1 LFx56, LF356B 7.5 SR Slew Rate V/μs LFx56, LF356B 12 LF357: AV = 5 LFx57 50 LFx55 2.5 Gain Bandwidth GBW LFx56, LF356B 5 MHz Product LFx57 20 LFx55 4 Settling Time to ts LFx56, LF356B 1.5 μs 0.01%(1) LFx57 1.5 LFx55 25 f = 100 Hz LFx56, LF356B 15 nV/√Hz LFx57 15 Equivalent Input en RS = 100 Ω Noise Voltage LFx55 20 f = 1000 Hz LFx56, LF356B 12 nV/√Hz LFx57 12 LFx55 f = 100 Hz LFx56, LF356B 0.01 pA/√Hz LFx57 Equivalent Input in Current Noise LFx55 f = 1000 Hz LFx56, LF356B 0.01 pA/√Hz LFx57 LFx55 Input CIN LFx56, LF356B 3 pF Capacitance LFx57 (1) Settling time is defined here, for a unity gain inverter connection using 2-kΩ resistors for the LF15x. It is the time required for the error voltage (the voltage at the inverting input pin on the amplifier) to settle to within 0.01% of its final value from the time a 10-V step input is applied to the inverter. For the LF357, AV = −5, the feedback resistor from output to input is 2 kΩ and the output step is 10 V (See Settling Time Test Circuit). Copyright © 2000–2015, Texas Instruments Incorporated Submit Documentation Feedback 5 LF156 LF256 LF356 Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 5 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information 6.5 AC Electrical Characteristics, TA = TJ = 25°C, VS = ±15 V 6.6 DC Electrical Characteristics, TA = TJ = 25°C, VS = ±15 V 6.7 DC Electrical Characteristics 6.8 Power Dissipation Ratings 6.9 Typical Characteristics 6.9.1 Typical DC Performance Characteristics 6.9.2 Typical AC Performance Characteristics 7 Detailed Description 7.1 Overview 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Large Differential Input Voltage 7.3.2 Large Common-Mode Input Voltage 7.4 Device Functional Modes 8 Application and Implementation 8.1 Application Information 8.2 Typical Application 8.2.1 Design Requirements 8.2.2 Detailed Design Procedure 8.2.3 Application Curves 8.3 System Examples 9 Power Supply Recommendations 10 Layout 10.1 Layout Guidelines 10.1.1 Printed-Circuit-Board Layout For High-Impedance Work 10.2 Layout Example 11 Device and Documentation Support 11.1 Related Links 11.2 Community Resources 11.3 Trademarks 11.4 Electrostatic Discharge Caution 11.5 Glossary 12 Mechanical, Packaging, and Orderable Information