LT1077 Linear Technology Corporation, LT1077 Datasheet

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LT1077

Manufacturer Part Number
LT1077
Description
Micropower, Single Supply, Precision Op Amp
Manufacturer
Linear Technology Corporation
Datasheet

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FEATURES
TYPICAL APPLICATIO
APPLICATIO S
, LTC and LT are registered trademarks of Linear Technology Corporation.
60µA Max Supply Current
40µV Max Offset Voltage
350pA Max Offset Current
0.5µV
2.5pA
O.4µV/°C Offset Voltage Drift
250kHz Gain-Bandwidth Product
0.12V/µs Slew Rate
Single Supply Operation
Output Sources and Sinks 5mA Load Current
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
0.1µF
Input Voltage Range Includes Ground
Output Swings to Ground while Sinking Current
No Pull-Down Resistors are Needed
P-P
P-P
0.1Hz to 10Hz Voltage Noise
0.1Hz to 10Hz Current Noise
Self Buffered Micropower Reference
750k
2
3
+
3.6V TO 9V
U
LT1077
7
4
LT1034
1.2V
6
SUPPLY CURRENT = 60µA MAX
SOURCES UP TO 10mA
LOAD REGULATION = 30µV/mA
TEMPERATURE DRIFT = 12ppm/°C
U
OUTPUT
1.230V
±1.2% MAX
LT1077 • TA01
DESCRIPTIO
The LT
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.
Micropower, Single Supply,
®
1077 is a micropower precision operational
35
30
20
25
15
10
0
5
Distribution of Input Offset Voltage
–40
–30
U
Precision Op Amp
INPUT OFFSET VOLTAGE (µV)
–20
–10
0
10
V
T
1072 UNITS
TESTED IN
H, J8, N8
PACKAGES
20
A
S
= 25°C
= 5V, 0V
30
LT1077 • TA02
40
LT1077
1077fa
1

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LT1077 Summary of contents

Page 1

... 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— ...

Page 2

... Input Noise Voltage Density i Input Noise Current (Note 1) Operating Temperature Range LT1077AM/LT1077M (OBSOLETE).... – 55°C to 125°C LT1077AI/LT1077I.............................. – 40°C to 85°C LT1077AC/LT1077C/LT1077S8 ............... 0°C to 70°C Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300° TOP VIEW ...

Page 3

... Output High GND 3.5 (Note 2) 0.05 f ≤ 20kHz 10k, Wiper to V ±500 pot (Note 5) = 0.1V 1.4V unless otherwise noted CONDITIONS MIN LT1077IS8 (Note 0.05V to 3. 3.1V to 12V 0.05V to 3.5V 50k 120 O L Output Low, No Load Output Low 100µA SINK Output High, No Load 3 ...

Page 4

... I Supply Current S 4 The denotes the specifications which apply over the temperature range = 25° 5V, 0V 0.1V CONDITIONS MIN LT1077S8 (Note 6) LT1077S8 (Note 3. 2.6V to 12V 100 0.05V to 3.5V 50k 180 O L Output Low, No Load Output Low 100µ ...

Page 5

... V = ± 2.5V 0V The denotes the specifications which apply over the temperature range of ≤ 85°C for AI/I grades ±15V unless otherwise noted CONDITIONS MIN LT1077IS8 (Note ±10V 300 13V, –14. 5V ±18V ...

Page 6

... Temperature (In All Packages 5V 400 UNITS TESTED (100 IN EACH PACKAGE –2.0 –1.0 0 1.0 OFFSET VOLTAGE DRIFT WITH TEMPERATURE (nV/°C) LT1077 • TPC08 Input Bias Currents vs Common Mode Voltage – 5V –3 – 25° 55°C A – 125°C A – ...

Page 7

... V 160 60 180 200 100 1000 CAPACITIVE LOAD (pF) Large-Signal Transient Response V = ±15V S 0V 100µs/DIV LOAD Small-Signal Transient Response V = ±15V 10µs/DIV 15pF 10,000 LT1077 • TPC12 0V 0V 1077fa 7 ...

Page 8

... Voltage Gain vs Load Resistance 10M 1. 25°C 2. –55° ±15V S 3. 125° –55°C 5. 25°C 6. 125°C 100k 3 100 1k 10k LOAD RESISTANCE TO GROUND (Ω) LT1077 • TPC20 Short-Circuit Current vs Time 25° 5V 25° ±15V 125° ...

Page 9

... LM4250) are removed. Since the offset voltage of the LT1077 is extremely low, nulling will be unnecessary in most applications. Single Supply Operation The LT1077 is fully specified for single supply operation, (i.e., when the negative supply is 0V). Input common mode range goes below ground and the output swings change of 7µV if within a few millivolts of ground while sinking current ...

Page 10

... As the output now swings to 10V, this resistor draws 1mA of current. Since the output of the LT1077 cannot go exactly to ground, but can only approach ground to within a few millivolts, care should be exercised to ensure that the output is not saturated. For example, a 1mV input signal will cause the amplifier to set up in its linear region in the gain 100 configuration shown below ...

Page 11

... TYPICAL APPLICATIO S THE USEFULNESS OF DIFFERENCE AMPLIFIERS IS LIMITED BY THE FACT THAT THE INPUT RESISTANCE IS EQUAL TO THE SOURCE RESISTANCE. THE PICO-AMPERE OFFSET CURRENT AND LOW CURRENT NOISE OF THE LT1077 ALLOWS THE USE OF 1M SOURCE RESISTORS WITHOUT DEGRADATION IN PERFORMANCE. IN ADDITION, WITH MEGAOHM RESISTORS MICROPOWER ...

Page 12

... V ≥ 3.2V, V INPUT 50µ 50k OPTIONAL CMRR TRIM 2 OUT SIP NETWORK – = –4.7V TO –18V – LT1077 • TA04 Half-Wave Rectifier – LT1077 OUTPUT 6mV 0MIN NO DISTORTION TO 100Hz 1.8V 0 –1.8V 1.8V LT1077 • TA06 1077fa ...

Page 13

... PLIFIED SCHE ATIC LT1077 1077fa 13 ...

Page 14

... LT1077 PACKAGE DESCRIPTIO .335 – .370 (8.509 – 9.398) DIA .305 – .335 (7.747 – 8.509) .040 (1.016) MAX SEATING PLANE .010 – .045* (0.254 – 1.143) .016 – .021** (0.406 – 0.533) CORNER LEADS OPTION .045 – .068 (1.143 – 1.650) ...

Page 15

... TYP .100 (2.54) BSC INCHES .400* (10.160) MAX .130 ± .005 (3.302 ± 0.127) .125 .020 (3.175) MIN (0.508) MIN .018 ± .003 (0.457 ± 0.076) N8 0502 LT1077 1077fa 15 ...

Page 16

... LT1077 PACKAGE DESCRIPTIO .050 BSC N .245 MIN 1 2 .030 ±.005 TYP RECOMMENDED SOLDER PAD LAYOUT .010 – .020 (0.254 – 0.508) .008 – .010 (0.203 – 0.254) NOTE: 1. DIMENSIONS IN 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. ...

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