Linear Technology LT1179S8, LT1178S8 Datasheet

1

LT1178S8

20µA Max, Dual

SO-8 Package, Single Supply

Precision Op Amp

DUESCRIPTIO

S

F

EATU

RE

The LT1178S8 is a micropower dual op amp in the surface
mount 8-pin package. It is optimized for single supply
operation at 5V. Specifications are also provided at ±15V
supplies.

The extremely low supply current is combined with true
precision specifications: offset voltage is 60µV, offset
current is 50pA. Both offset parameters have low drift with
temperature. The 1.5pA

P-P

current noise and picoampere
offset current permit the use of megohm level source
resistors without introducing serious errors. Voltage noise
at 0.9µ V

P-P

is remarkably low considering the low supply

current.
The LT1178S8 can be operated from a single supply as low

as one lithium cell or two Ni-Cad batteries. The input range
goes below ground. The all-NPN output stage swings to
within a few millivolts of ground while sinking current––
no power consuming pull-down resistors are needed.

For applications where three times higher supply current
is acceptable, the micropower LT1077 single, LT1078
dual and LT1079 quad are recommended. The LT1077/
LT1078/LT1079 have significantly higher bandwidth, slew
rate; lower voltage noise and better output drive capability.

■

8-Pin SO Package

■

20µA Max Supply Current per Amplifier

■

180µV Max Offset Voltage

■

350pA Max Offset Current

■

0.9µV

P-P

, 0.1Hz to 10Hz Voltage Noise

■

1.5pA

P-P

, 0.1Hz to 10Hz Current Noise

■

0.6µV/°C Offset Voltage Drift

■

Single Supply Operation:
– Input Voltage Range Includes Ground
– Output Swings to Ground While Sinking Current
– No Pull-Down Resistors Are Needed

■

Output Sources and Sinks 5mA Load Current

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen­tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

PART MARKING

TOP VIEW

S8 PACKAGE

8-LEAD PLASTIC SOIC

1

2

3

4

8

7

6

5

+IN A

V

–

+IN B
–IN B

–IN A
OUT A
V

+



OUT B



T

JMAX

= 150°C, θJA = 200°C/ W

LT1178S8

WU

U

PACKAGE

/

O

RDER I FOR ATIO

Please note that the LT1178S8 surface mount pinout differs from that of
the LT1178 standard plastic or ceramic dual-in-line packages.

Consult factory for Industrial and Military grade parts.

1178

ORDER PART

NUMBER

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

Input Offset Voltage VS = 5V, 0V TA = 25°C 60 180 µV

V

S

= 5V, 0V 0°C ≤ TA ≤ 70°C 85 350 µV

V

S

= ±15V TA = 25°C 120 350 µV

VS = ±15V 0°C ≤ TA ≤ 70°C 150 540 µV

∆V

OS

Input Offset Voltage Drift (Note 1) VS = 5V, 0V 0°C ≤ TA ≤ 70°C 0.6 3.5 µV/°C

∆TV

S

= ±15V 0°C ≤ TA ≤ 70°C 0.7 3.8 µV/°C

For electrical specifications not listed below, refer to the standard LT1178C data sheet with the changes noted on this page.

Note 1: Not 100% production tested.

E

LECTRICAL C CHARA TERIST

ICS

2

LT1178S8

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7487

[phone]

●

FAX

: [phone]

●

TELEX

: 499-3977

 LINEAR TECHNOLOGY CORPORATION 1994

LT 0394 • PRINTED IN USA

S8 Package

8-Lead Plastic SOIC

PACKAGE DESCRIPTIO

U

Dimension in inches (millimeters) unless otherwise noted.

1

2

3

4

0.150 – 0.157*
(3.810 – 3.988)

8

7

6

5

0.189 – 0.197*
(4.801 – 5.004)

0.228 – 0.244

(5.791 – 6.197)

0.016 – 0.050

0.406 – 1.270

0.010 – 0.020

(0.254 – 0.508)

× 45°

0°– 8° TYP

0.008 – 0.010

(0.203 – 0.254)

SO8 0294

0.053 – 0.069

(1.346 – 1.752)

0.014 – 0.019

(0.355 – 0.483)

0.004 – 0.010

(0.101 – 0.254)

0.050

(1.270)

BSC

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm).