1
LT1178S8
20
µ
A Max, Dual
SO-8 Package, Single Supply
Precision Op Amp
D
U
ESCRIPTIO
S
FEATURE
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 60
µ
V, 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 0.9
µ
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.
s
8-Pin SO Package
s
20
µ
A Max Supply Current per Amplifier
s
180
µ
V Max Offset Voltage
s
350pA Max Offset Current
s
0.9
µ
V
P-P
, 0.1Hz to 10Hz Voltage Noise
s
1.5pA
P-P
, 0.1Hz to 10Hz Current Noise
s
0.6
µ
V/
°
C Offset Voltage Drift
s
Single Supply Operation:
Input Voltage Range Includes Ground
Output Swings to Ground While Sinking Current
No Pull-Down Resistors Are Needed
s
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 represen-
tation 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,
JA
= 200
°
C/ W
LT1178S8
W
U
U
PACKAGE/ORDER 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
V
S
= 5V, 0V
T
A
= 25
°
C
60
180
µ
V
V
S
= 5V, 0V
0
°
C
T
A
70
°
C
85
350
µ
V
V
S
=
±
15V
T
A
= 25
°
C
120
350
µ
V
V
S
=
±
15V
0
°
C
T
A
70
°
C
150
540
µ
V
V
OS
Input Offset Voltage Drift (Note 1)
V
S
= 5V, 0V
0
°
C
T
A
70
°
C
0.6
3.5
µ
V/
°
C
T
V
S
=
±
15V
0
°
C
T
A
70
°
C
0.7
3.8
µ
V/
°
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.
ELECTRICAL C
C
HARA TERISTICS
2
LT1178S8
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900
q
FAX
: (408) 434-0507
q
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).
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