LT1077_1 Datasheet, PDF (1/16 Pages) Linear Technology – Micropower, Single Supply, Precision Op Amp

LT1077
Micropower, Single Supply,
Precision Op Amp
FEATURES
■ _{60µA Max Supply Current}
■ _{40µV Max Offset Voltage}
■ _{350pA Max Offset Current}
■ _{0.5µVP-P 0.1Hz to 10Hz Voltage Noise}
■ _{2.5pAP-P 0.1Hz to 10Hz Current Noise}
■ _{O.4µV/°C Offset Voltage Drift}
■ _{250kHz Gain-Bandwidth Product}
■ _{0.12V/µs Slew Rate}
■ _{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}
U
APPLICATIO S
■ _{Replaces OP-07, OP-77, AD707, LT1001, LT1O12}
at 10 to 60 Times Lower Power
■ _{Battery or Solar Powered Systems}
■ _{4mA to 2OmA Current Loops}
■ _{Two Terminal Current Source}
■ _{Megaohm Source Resistance Difference Amplifier}
, LTC and LT are registered trademarks of Linear Technology Corporation.
DESCRIPTIO
The LT^®1077 is a micropower precision operational
amplifier optimized for single supply operation at 5V. In
addition, ±15V specifications are provided.
Micropower performance of competing devices is
achieved at the expense of seriously degrading precision,
noise, speed, and output drive specifications. The LT1077
reduces supply current without sacrificing other
parameters. The offset voltage achieved is the lowest
of any micropower op amp. 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.
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.
The LT1077 is completely plug-in compatible (including
nulling) with all industry standard precision op amps.
Thus, it can replace these precision op amps in many
applications without sacrificing performance, yet with
significant power savings.
The LT1077 can be operated from one lithium cell or two
Ni-Cad batteries. The input range goes below ground. The
all-NPN output stage swings to ground while sinking
current—no pull-down resistors are needed.
For dual and quad op amps with similar specifications
please see the LT1078/LT1079 datasheet.
TYPICAL APPLICATIO
0.1µF
Self Buffered Micropower Reference
3.6V TO 9V
2_– 7
6
LT1077
3₊
4
750k
LT1034
1.2V
OUTPUT
1.230V
±1.2% MAX
SUPPLY CURRENT = 60µA MAX
SOURCES UP TO 10mA
LOAD REGULATION = 30µV/mA
TEMPERATURE DRIFT = 12ppm/°C
LT1077 • TA01
Distribution of Input Offset Voltage
35
VS = 5V, 0V
30
TA = 25°C
1072 UNITS
25
TESTED IN
H, J8, N8
20
PACKAGES
15
10
5
0
–40 –30 –20 –10 0 10 20 30 40
INPUT OFFSET VOLTAGE (µV) LT1077 • TA02
1077fa
1