Datasheet Linear Technology LT1007

Manufacturer	Linear Technology
Series	LT1007

Low Noise, High Speed Precision Operational Amplifiers

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Low Noise, High Speed Precision Operational Amplifiers

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Packaging

	LT1007ACN8#PBF	LT1007CN8#PBF	LT1007CS8#PBF	LT1007CS8#TRPBF	LT1007IN8#PBF	LT1007IS8#PBF	LT1007IS8#TRPBF
N	1	2	3	4	5	6	7
Package	N-8 Package Outline Drawing	N-8 Package Outline Drawing	SO-8 Package Outline Drawing	SO-8 Package Outline Drawing	N-8 Package Outline Drawing	SO-8 Package Outline Drawing	SO-8 Package Outline Drawing
Package Code	N	N	S8	S8	N	S8	S8
Package Index	05-08-1510 (N8)	05-08-1510 (N8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1510 (N8)	05-08-1610 (S8)	05-08-1610 (S8)
Pin Count	8	8	8	8	8	8	8

Parametrics

Parameters / Models	LT1007ACN8#PBF	LT1007CN8#PBF	LT1007CS8#PBF	LT1007CS8#TRPBF	LT1007IN8#PBF	LT1007IS8#PBF	LT1007IS8#TRPBF
Av Min Stable, V/V	1	1	1	1	1	1	1
Avol, dB	86	86	86	86	86	86	86
Common Mode Rejection Ratio, dB	130	130	130	130	130	130	130
Number of Channels	1	1	1	1	1	1	1
Cload, pF	100	100	100	100	100	100	100
Demo Boards	DC417B	DC417B	DC417B	DC417B	DC417B	DC417B	DC417B
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Enoise 1/f Corner, Hz	2	2	2	2	2	2	2
Enoise Density, nV/rtHz	2.5	2.5	2.5	2.5	2.5	2.5	2.5
Export Control	no	no	no	no	no	no	no
GBW, MHz	8	8	8	8	8	8	8
Ibias, nA	10	10	10	10	10	10	10
Inoise, pA/rtHz	0.4	0.4	0.4	0.4	0.4	0.4	0.4
Inoise 1/f Corner, Hz	120	120	120	120	120	120	120
Ios, µA	0.007	0.007	0.007	0.007	0.007	0.007	0.007
Iout, mA	20.8	20.8	20.8	20.8	20.8	20.8	20.8
Isupply, mA	2.6	2.6	2.6	2.6	2.6	2.6	2.6
LF Enoise, µVPP	0.06	0.06	0.06	0.06	0.06	0.06	0.06
Operating Temperature Range, °C	0 to 70	0 to 70	0 to 70	0 to 70	-40 to 85	-40 to 85	-40 to 85
Over-the-Top	no	no	no	no	no	no	no
PSRR, dB	130	130	130	130	130	130	130
Rail-to-Rail In	no	no	no	no	no	no	no
Rail-to-Rail Out	no	no	no	no	no	no	no
SR, V/µs	2.5	2.5	2.5	2.5	2.5	2.5	2.5
Shutdown	no	no	no	no	no	no	no
Single Supply	no	no	no	no	no	no	no
Type	VFB	VFB	VFB	VFB	VFB	VFB	VFB
VinCM High (from V+), V	2.5	2.5	2.5	2.5	2.5	2.5	2.5
VinCM Low (from V-), V	2.5	2.5	2.5	2.5	2.5	2.5	2.5
Voh (from V+), V	1.2	1.2	1.2	1.2	1.2	1.2	1.2
Vol (from V-), V	1.2	1.2	1.2	1.2	1.2	1.2	1.2
Vos, mV	0.01	0.01	0.01	0.01	0.01	0.01	0.01
Vos TC, µV/C	0.2	0.2	0.2	0.2	0.2	0.2	0.2
Vs Max, V	44	44	44	44	44	44	44
Vs Min, V	4	4	4	4	4	4	4

Eco Plan

	LT1007ACN8#PBF	LT1007CN8#PBF	LT1007CS8#PBF	LT1007CS8#TRPBF	LT1007IN8#PBF	LT1007IS8#PBF	LT1007IS8#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Other Options

LT1037 LT1037

Application Notes

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Methods for Measuring Op Amp Settling Time &mdash AN10
PDF, 277 Kb, File published: Jul 1, 1985
The AN10 begins with a survey of methods for measuring op amp settling time. This commentary develops into circuits for measuring settling time to 0.0005%. Construction details and results are presented. Appended sections cover oscilloscope overload limitations and amplifier frequency compensation.
Extract from the document
Application Note 10
July 1985
Methods of Measuring Op Amp Settling Time
Jim Williams
Servo, DAC and data acquisition amplifiers all require
good dynamic response. In particular, the time required
for an amplifier to settle to final value after an input step
is especially important. This specification allows setting
a circuitвЂ™s timing margins with confidence that the data
produced is accurate. The settling time is the total length
of time from input step application until the amplifier remains within a specified error band around the final value. 10mV or less for a 10V step is of interest. No generalpurpose pulse generator is meant to hold output amplitude
and noise within these limits. Generator output-caused
aberration appearing at the oscilloscope probe will be
indistinguishable from amplifier output movement, producing unreliable results. The oscilloscope connection
presents additional problems. As probe capacitance rises,
AC loading of the resistor junction will influence observed
settling waveforms. The 20pF probe shown alleviates this
problem but its 10X attenuation sacrifices oscilloscope
gain. 1X probes are not suitable because of their excessive
input capacitance. An active 1X FET probe will work, but
another issue remains. Figure 1 shows one way to measure amplifier settling
time (see References 1, 2, and 3). The circuit uses the
вЂњfalse sum nodeвЂќ technique. The resistors and amplifier …
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Risk Assessment Advice for High Reliability Amplifiers &mdash AN141
PDF, 299 Kb, File published: Oct 7, 2013
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Application Note 141
October 2013
Risk Assessment Advice for High Reliability Amplifiers
Tim Regan and James Mahoney Introduction
In long life, high reliability systems, supplied power is
provided only to essential circuitry. As a result many of
the unpowered circuits may have voltages applied to inputs and outputs without proper supply biasing. As part
of any diligent system safety risk assessment, a question
often arises; will the unpowered components be damaged,
degraded, or impair circuit performance under these
abnormal operating conditions?
The purpose of this article is to provide advice for what
lies within the pins of several common amplifiers used in
these applications. Most of the amplifiers of interest are the
radiation hard amplifiers so indicated with a device prefix
of RH. Another amplifier, the LT6016, is particularly robust
with over, under and reversed polarity voltage conditions
and is included for reference.
With no power applied to the amplifier, forcing a voltage
between two pins will cause a current to flow. The magnitude of this current differs from pin to pin and device to
device. A curve tracer is used to show the current vs voltage
characteristic when overdriving specific pin combinations.
Referencing these curve trace plots will provide an indication of the magnitude of current flow for a particular …
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Take the Mystery Out of the Switched Capacitor Filter &mdash AN40
PDF, 3.0 Mb, File published: Mar 1, 1990
This note presents guidelines for circuits utilizing LTC's switched capacitor filters. The discussion focuses on how to optimize filter performance by optimizing the printed wiring board, the power supply, and the output buffering of the filter. Many additional topics are discussed such as how to select the proper filter response for the application and how to characterize a filter's THD for DSP applications.
Extract from the document
Application Note 40
March 1990
Take the Mystery Out of the Switched-Capacitor Filter:
The System DesignerвЂ™s Filter Compendium
Richard Markell
INTRODUCTION
Overview
This Application Note presents guidelines for circuits utilizing Linear TechnologyвЂ™s switched-capacitor filter family.
Although the switched-capacitor filter has been designed
into вЂњtelecomвЂќ circuits for over 20 years, the newer devices are faster, quieter and lower in distortion. These
filters now achieve total harmonic distortion (THD) below
вЂ“76dB (LTCВ®1064-2), wideband noise below 55ОјVRMS
(LTC1064-3), high frequency of operation (LTC1064-2,
LTC1064-3 and LTC1064-4 to 100kHz) and steep roll-offs
from passband to stopband (LTC1064-1: вЂ“72dB at 1.5 Г—
fCUTOFF). These specifications make the new generation of
switched-capacitor filters from LTC candidates to replace
all but the most esoteric of active RC filter designs.
Application Note 40 takes the mystery from the design of
high performance active filters using switched-capacitor
filter integrated circuits. To help the designer get the highest performance available, this Note covers most of the
problems prevalent in system level switched-capacitor
filter design. The Note covers both tutorial filter material …
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Using the LTC Op Amp Macromodels &mdash AN48
PDF, 297 Kb, File published: Nov 8, 1991
LTC's op amp macromodels are described in detail, along with the theory behind each model and complete schematics of each topology. Extended modeling topics are discussed, such as phase/frequency response modifications and asymmetric slew rate for JFET op amp models. LTC's macromodels are optimized for accuracy and fast simulation times. Simulation times can be further reduced by using streamlining techniques found throughout AN48.
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Application Note 48
November 1991
Using the LTC Op Amp Macromodels
Getting the Most from SPICE and the LTC Library
Walt Jung INTRODUCTION This application note is an overview discussion of the
Linear Technology SPICE macromodel library. It assumes
little if any prior knowledge of this software library or its
history. However, it does assume familiarity with both the
analog simulation program SPICE (or one of its many
derivatives), and modern day op amps, including bipolar,
JFET, and MOSFET amplifier technologies.
Some Preliminary SPICE Facts of Life
In the past few years, SPICE simulations have really begun
to capture a high level of attention on the part of analog
circuit designers. Perhaps this is due to more affordable
high performance computers, or perhaps the time for
simulation is now upon us. In any event, the bottom line is
that IC vendors are now making macromodels for op amps
available to their customers.
For the analog circuit designer, there can be no better fate
for simulations, viewing this situation in terms of which
model to use. Designers no longer need worry about
whether the third party supplierвЂ™s model can really cut it. …

Design Notes

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Updated Operational Amplifier Selection Guide for Optimum Noise Performance &mdash DN140
PDF, 74 Kb, File published: Oct 1, 1996
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Operational Amplifier Selection Guide for
Optimum Noise Performance вЂ“ Design Note 140
Frank Cox
Eight years ago, George Erdi wrote a very useful Design
Note (DN6) that presented information to aid in the
selection of op amps for optimum noise performance,
in both graphical and tabular form. Design Note 140 is
an update of DN6. It covers new low noise op amps as
well as some high speed op amps. Although a great deal
has changed in eight years, especially in electronics,
noise is still a critical issue in op amp circuit design
and the LTВ®1028 is still the lowest noise op amp for
low source impedance applications.
The amount of noise an op amp circuit will produce
is determined by the device used, the total resistance
in the circuit, the bandwidth of the measurement, the
temperature of the circuit and the gain of the circuit. A
convenient п¬Ѓgure of merit for the noise performance
of an op amp is the spectral density or spot noise. This
is obtained by normalizing the measurement to a unit
of bandwidth. Here the unit is 1Hz and the noise is reported as вЂњnV/в€љHz.вЂќ The noise in a particular application
bandwidth can be calculated by multiplying the spot
noise by the square root of the application bandwidth. …
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New Voltage References Are Smaller and More Precise &mdash DN145
PDF, 84 Kb, File published: Jan 1, 1997
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Voltage References Are Smaller and More Precise
Design Note 145
John Wright
Introduction
Two new series voltage references bridge the gap
between small package size and high precision. Advances in design, process and packaging have made the
introduction of these new voltage references possible.
The low power LTВ®1460 is designed for minimum space
and is available in all popular voltages, including 2.5V,
5V and 10V. By contrast, the LT1236 is designed for
use in 12-bit and higher systems and combines 0.05%
accuracy, low noise, low drift and the SO-8 package
for difп¬Ѓcult industrial temperature range applications.
Longer Battery Life with Precision
The LT1460 low power, series reference has a large
advantage over older shunt-style references. Shunt
references require a resistor from the power supply
to operate. This resistor must be chosen to supply the
maximum current that can ever be demanded by the
circuit being regulated. When the circuit being controlled
is not operating at this maximum current, the shunt
reference must always sink this current, resulting in
high dissipation and short battery life. Because the …
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Noise Calculations in Op Amp Circuits &mdash DN15
PDF, 224 Kb, File published: Sep 1, 1988
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Noise Calculations1 in Op Amp Circuits вЂ“ Design Note 15
Alan Rich
Noise calculations in op amp circuits are one of the most
confused calculations that an analog engineer must
perform.
One cannot just look at noise specifications; the total op
amp circuit including resistors and operating frequency
range must be included in calculations for circuit noise. A
вЂњlowвЂќ noise amplifier in one circuit will become a вЂњhighвЂќ
noise amplifier in another circuit.
As part of this Design Note, an IBM-PC2 or compatible
computer program, NOISE, has been written to perform
the noise calculations. This program allows the user to
calculate circuit noise using LTC op amps, determine the
best LTC op amp for a low noise application, display the
noise data for LTC op amps, calculate resistor noise, and
calculate circuit noise using noise specs for any op amp.
At the end of this Design Note there are detailed operating
instructions for the computer program NOISE.
To calculate noise for an op amp circuit, one must consider the op amp voltage and current noise density and
1/f corner frequency, the frequency range of interest, and
the resistor noise.
The most comprehensive specification for voltage or current noise is the noise density frequency response curve …
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Operational Amplifier Selection Guide for Optimum Noise Performance &mdash DN3
PDF, 224 Kb, File published: Oct 1, 1987
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Operational Amplifier Selection Guide for Optimum Noise
Performance вЂ“ Design Note 3
George Erdi
The LTВ®1028 is the lowest noise op amp available today.
Its voltage noise is less than that of a 50О© resistor. In
other words, if the LT1028 is operated with source resistors in excess of 50О© , resistor noise will dominate. If the
application requires large source resistors, the LT1028вЂ™s
relatively high current noise will limit performance, and
other op amps will provide lower overall noise. The table below lists which op amp gives minimum total
noise for a specified equivalent source resistance. A two
step procedure should be followed to optimize noise: In general, the total noise of any op amp (referred to the
input) is given by: The table actually has two sets of devices: one for low
frequency (instrumentation), one for wideband applications. The slight differences between the two columns
occur because voltage and current noise increase at low
frequencies (below the so-called 1/f corner) while resistor
noise is flat with frequency. total noise = (voltage noise) + (resistor noise) + (current noise R )
2 2 2 eq where, (2) Enter the table to find the optimum op amp. Best Op Amp for Lowest Noise vs Source Resistance resistor noise = 0.13 Re q in nV Hz
and Req = equivalent source resistance
= R2 + R1//R3
R3
R1 вЂ“ R2 + DN003 F01 Several conclusions can be reached by inspection of the
equation:
(a) To minimize noise, resistor values should be minimized to make the contribution of the second and …
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Ultra Low Noise Op Amp Combines Chopper and Bipolar Op Amps &mdash DN36
PDF, 99 Kb, File published: Jul 1, 1990
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Ultra Low Noise Op Amp Combines Chopper and
Bipolar Op Amps вЂ“ Design Note 36
Nello Sevastopoulos
low noise voltage of the LTВ®1007 precision bipolar op
amp appears in Figure 1. This composite op amp can,
for instance, be used as a strain gauge ampliп¬Ѓer. One
half of the LTC1051 dual chopper op amp, LTC1051,
integrates the small LT1007 input offset voltage and
applies a DC correction voltage at its pin-8 via divider
(R2, R3). The other half of the LTC1051, buffers the VOS
nulling circuitry eliminating loading at input A. Resistors R1, R2, R3 allow the integrator full output swing
assuring VOS correction of the LT1007. The ratio of R3
to R2 is made as high as possible to limit noise injection
of the chopper into pin-8 of the bipolar op amp. The
total measured input VOS was 2ОјV, with a 10nV/В°C drift. Chopper op amp technology has continuously improved.
Contemporary single, dual and quad low noise chopper
op amps (LTCВ®1050/51/53), with internal sample and
hold capacitors, are compatible with industry standard
op amp sockets.
Chopper op amps are mainly used to amplify small DC
signals and these applications require excellent VOS, VOS
drift, low bias current and low noise. The outstanding
VOS performance of chopper op amps is well known. …
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Chopper vs Bipolar Op AmpsвЂ”An Unbiased Comparison &mdash DN42
PDF, 70 Kb, File published: Dec 1, 1990
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Chopper vs Bipolar Op AmpsвЂ”An Unbiased Comparison
Design Note 42
George Erdi Table 1 lists the parameters of importance. In all input
parameters (except noise) the advantage unquestionably goes to the choppers. 5ОјV maximum offset voltage, 0.5ОјV/В°C maximum drift are commonly found
Table 1. Chopper Stabilized vs Precision Bipolar Op Amps
ADVANTAGE
PARAMETER
Offset Voltage
Offset Drift
All Other DC Specs CHOPPER BIPOLAR COMMENTS
вњ“
вњ“
вњ“ No Contest Wideband, 20Hz to
1MHz вњ“ See Details in Text Noise вњ“ See Details in Text вњ“ Rail to Rail Swing
2mA Limit on
Choppers Output: Light Load
Heavy Load
Single Supply
Application вњ“ вњ“ Inherent to
Choppers Needs
Special Design
Bipolars В±15V Supply Voltage вњ“ Except LTC1150 Prejudice/Tradition вњ“ Still a Chopper
Problem Cost 08/90/86_conv вњ“ Unless DC …
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Operational Amplifier Selection Guide for Optimum Noise Performance &mdash DN6
PDF, 137 Kb, File published: Jan 1, 1988

Articles

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New Rail-to-Rail Output Op Amps Bring Precision Performance to Low Voltage Systems &mdash LT Journal
PDF, 370 Kb, File published: May 1, 2000
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DESIGN FEATURES New Rail-to-Rail Output Op Amps
Bring Precision Performance to
Low Voltage Systems
by Alexander Strong
and Gary Maulding Introduction
Linear Technology has recently
released several new high precision
op amps for use in low voltage systems. The LT1677, LT1881, LT1882,
LT1884 and LT1885 all operate on
power supplies from 3V or lower up to
36V and have rail-to-rail output voltage swing. These amplifiers allow high
precision circuits to be implemented
on low voltage power supplies,
including single positive supplies.
Rail-to-rail output stages maintain
the output signal dynamic range by
eliminating the base-emitter voltage
drops of conventional emitter-follower
output stages. Offset voltages are trimmed to less than 80ВµV, with the low
temperature drift and low noise to be
expected from bipolar transistor
designs. High open-loop voltage gains
maintain this accuracy over the output swing range. …
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JFET Op Amps Equal Low Noise Bipolars and Have Picoamp Current Noise &mdash LT Journal
PDF, 160 Kb, File published: Sep 1, 1999
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DESIGN FEATURES JFET Op Amps Equal Low Noise
Bipolars and Have Picoamp
by Alexander Strong
Current Noise
The LT1792 and LT1793 are single
JFET op amps that offer both very low
voltage noise (4nV/в€љHz for the LT1792
and 6nV/в€љHz for the LT1793) and low
current noise (10fA/в€љHz for the
LT1792 and 0.8fA/в€љHz for the
LT1793), providing the lowest total
noise over a wide range of transducer
impedance. Traditionally, op amp
users have been faced with a choice:
which op amp will have the lowest
noise for the transducer at hand. For
high transducer impedance, the
LT1792/LT1793 JFET op amps will
win over the lowest voltage noise
bipolar op amps due to lower current
noise. The current noise (2qIB) of an
amplifier is a function of the input
bias current (IB). For lower transducer impedance, bipolar op amps …
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Consider New Precision Amplifiers for Updated Industrial Equipment Designs &mdash LT Journal
PDF, 154 Kb, File published: Sep 1, 2009
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LвЂ‰DESIGN FEATURES Consider New Precision Amplifiers for
Updated Industrial Equipment Designs
by Brian Black Introduction
Industrial equipment is designed for
long life cycles, so the electronic components used in industrial applications
are often chosen with significant emphasis on proven performance, quality
and reliability. Precision amplifiers are
no exception. Even if new and innovative amplifiers become available over a
productвЂ™s lifetime, a redesigned board
is often built using the same proven
op amps in the old board. Even for
entirely new applications, designers
will choose amplifiers that have proven
their mettle in other circuits, making a
choice based more on familiarity than
performance.
Although an amplifier may have
been tried and proven in a design, it
is not necessarily the best solution for
every new design. Many can benefit
from using more recently released
amplifiers, which can improve overall
system performance, reduce power …

Model Line

Series: LT1007 (7)

LT1007ACN8#PBF LT1007CN8#PBF LT1007CS8#PBF LT1007CS8#TRPBF LT1007IN8#PBF LT1007IS8#PBF LT1007IS8#TRPBF

Manufacturer's Classification

Signal Conditioning > Amplifiers > Operational Amplifiers (Op Amps) > High Voltage Amplifiers (>12V) | Precision Amplifiers (Vos | Low Noise Amplifiers (