LT1078I Linear Technology, LT1078I Datasheet
LT1078I
Manufacturer Part Number
LT1078I
Description
Micropower/ Dual and Quad/ Single Supply/ Precision Op Amps
Manufacturer
Linear Technology
Datasheet
1.LT1078I.pdf
(20 pages)
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APPLICATIONS
FEATURES
TYPICAL PERFORMANCE
INPUT OFFSET VOLTAGE = 40 V
INPUT OFFSET CURRENT = 0.2nA
TOTAL POWER DISSIPATION = 240 W
COMMON MODE REJECTION = 110dB (AMPLIFIER LIMITED)
GAIN BANDWIDTH PRODUCT = 200kHz
, LTC and LT are registered trademarks of Linear Technology Corporation.
Battery or Solar-Powered Systems
Micropower Sample-and-Hold
Thermocouple Amplifier
Micropower Filters
Available in 8-Pin SO Package
50 A Max Supply Current per Amplifier
70 V Max Offset Voltage
180 A Max Offset Voltage in 8-Pin SO
250pA Max Offset Current
0.6 V
3pA
0.4 V/ C Offset Voltage Drift
200kHz Gain Bandwidth Product
0.07V/ s Slew Rate
Single Supply Operation
Output Sources and Sinks 5mA Load Current
Single Battery, Micropower, Gain = 100, Instrumentation Amplifier
Portable Instrumentation
Remote Sensor Amplifier
Satellite Circuitry
Input Voltage Range Includes Ground
Output Swings to Ground while Sinking Current
No Pull-Down Resistors Needed
P-P
INVERTING
P-P
INPUT
1M
, 0.1Hz to 10Hz Current Noise
, 0.1Hz to 10Hz Voltage Noise
–
2
3
–
+
1/2 LT1078
U
10.1k
A
NONINVERTING
1
INPUT
10.1k
+
6
5
3V (LITHIUM CELL)
–
+
OUTPUT NOISE = 85 V
INPUT RANGE = 0.03V TO 1.8V
OUTPUT RANGE= 0.03V TO 2.3V
OUTPUTS SINK CURRENT—NO PULL-DOWN RESISTORS
ARE NEEDED
1/2 LT1078
Quad, Single Supply, Precision Op Amps
B
1M
8
4
= 300 V
7
(0.3mV
LT1078/79 • TA01
P-P
RMS
OUT
0.1Hz TO 10Hz
V
IN +
OVER FULL BANDWIDTH
– V
IN –
DESCRIPTION
The LT
packages including the small outline surface mount pack-
age. The LT1079 is a micropower quad op amp offered in
the standard 14-pin packages. Both devices are optimized
for single supply operation at 5V. 15V specifications are
also provided.
Micropower performance of competing devices is achieved
at the expense of seriously degrading precision, noise,
speed and output drive specifications. The design effort of
the LT1078/LT1079 was concentrated on reducing sup-
ply current without sacrificing other parameters. The
offset voltage achieved is the lowest on any dual or quad
nonchopper stabilized op amp—micropower or other-
wise. Offset current, voltage and current noise, slew rate
and gain bandwidth product are all two to ten times better
than on previous micropower op amps.
The 1/f corner of the voltage noise spectrum is at 0.7Hz,
at least three times lower than on any monolithic op amp.
This results in low frequency (0.1Hz to 10Hz) noise
performance which can only be found on devices with an
order of magnitude higher supply current.
Both the LT1078 and LT1079 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.
23mV)
®
1078 is a micropower dual op amp in 8-pin
Micropower, Dual and
Distribution of Input Offset Voltage
(LT1078 and LT1079 in H, J, N Packages)
U
16
14
12
10
–120
8
6
4
2
0
V
T
A
S
= 5V, 0V
= 25 C
–80
INPUT OFFSET VOLTAGE ( V)
–40
LT1078/LT1079
0
40
80
1078/79 • TA02
120
1
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