LF155, LF156, LF256, LF257

LF355, LF356, LF357

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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-k

Ω 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).

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5

LF156 LF256 LF356