Datasheet Linear Technology LT1793

Manufacturer	Linear Technology
Series	LT1793

Low Noise, Picoampere Bias Current, JFET Input Op Amp

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PDF, 176 Kb, Language: en, File uploaded: Aug 6, 2017, Pages: 12
Low Noise, Picoampere Bias Current, JFET Input Op Amp

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Packaging

	LT1793ACN8#PBF	LT1793ACS8#PBF	LT1793ACS8#TRPBF	LT1793AIN8#PBF	LT1793AIS8#PBF	LT1793AIS8#TRPBF	LT1793CN8#PBF	LT1793CS8#PBF	LT1793CS8#TRPBF	LT1793IN8#PBF	LT1793IS8#PBF	LT1793IS8#TRPBF
N	1	2	3	4	5	6	7	8	9	10	11	12
Package	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	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	S8	S8	N	S8	S8	N	S8	S8	N	S8	S8
Package Index	05-08-1510 (N8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1510 (N8)	05-08-1610 (S8)	05-08-1610 (S8)	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	8	8	8	8	8

Parametrics

Parameters / Models	LT1793ACN8#PBF	LT1793ACS8#PBF	LT1793ACS8#TRPBF	LT1793AIN8#PBF	LT1793AIS8#PBF	LT1793AIS8#TRPBF	LT1793CN8#PBF	LT1793CS8#PBF	LT1793CS8#TRPBF	LT1793IN8#PBF	LT1793IS8#PBF	LT1793IS8#TRPBF
Av Min Stable, V/V	1	1	1	1	1	1	1	1	1	1	1	1
Avol, dB	73	73	73	73	73	73	73	73	73	73	73	73
Common Mode Rejection Ratio, dB	102	102	102	102	102	102	102	102	102	102	102	102
Number of Channels	1	1	1	1	1	1	1	1	1	1	1	1
Cload, pF	10000	10000	10000	10000	10000	10000	10000	10000	10000	10000	10000	10000
Demo Boards	DC417B	DC417B	DC417B	DC417B	DC417B	DC417B	DC417B	DC417B	DC417B	DC417B	DC417B	DC417B
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Enoise 1/f Corner, Hz	30	30	30	30	30	30	30	30	30	30	30	30
Enoise Density, nV/rtHz	6	6	6	6	6	6	6	6	6	6	6	6
Export Control	no	no	no	no	no	no	no	no	no	no	no	no
GBW, MHz	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2
Ibias, nA	0.003	0.003	0.003	0.003	0.003	0.003	0.003	0.003	0.003	0.003	0.003	0.003
Inoise, pA/rtHz	0.0008	0.0008	0.0008	0.0008	0.0008	0.0008	0.0008	0.0008	0.0008	0.0008	0.0008	0.0008
Inoise 1/f Corner, Hz	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1
Ios, µA	0.0000015	0.0000015	0.0000015	0.0000015	0.0000015	0.0000015	0.0000015	0.0000015	0.0000015	0.0000015	0.0000015	0.0000015
Iout, mA	27	27	27	27	27	27	27	27	27	27	27	27
Isupply, mA	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2
LF Enoise, µVPP	2.4	2.4	2.4	2.4	2.4	2.4	2.4	2.4	2.4	2.4	2.4	2.4
Operating Temperature Range, °C	0 to 70	0 to 70	0 to 70	-40 to 85	-40 to 85	-40 to 85	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	no	no	no	no	no
PSRR, dB	98	98	98	98	98	98	98	98	98	98	98	98
Rail-to-Rail In	no	no	no	no	no	no	no	no	no	no	no	no
Rail-to-Rail Out	no	no	no	no	no	no	no	no	no	no	no	no
SR, V/µs	3.4	3.4	3.4	3.4	3.4	3.4	3.4	3.4	3.4	3.4	3.4	3.4
Shutdown	no	no	no	no	no	no	no	no	no	no	no	no
Single Supply	no	no	no	no	no	no	no	no	no	no	no	no
Type	JFET, VFB	JFET, VFB	JFET, VFB	JFET, VFB	JFET, VFB	JFET, VFB	JFET, VFB	JFET, VFB	JFET, VFB	JFET, VFB	JFET, VFB	JFET, VFB
VinCM High (from V+), V	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5
VinCM Low (from V-), V	4	4	4	4	4	4	4	4	4	4	4	4
Voh (from V+), V	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8
Vol (from V-), V	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8
Vos, mV	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25
Vos TC, µV/C	5	5	5	5	5	5	5	5	5	5	5	5
Vs Max, V	40	40	40	40	40	40	40	40	40	40	40	40
Vs Min, V	10	10	10	10	10	10	10	10	10	10	10	10

Eco Plan

	LT1793ACN8#PBF	LT1793ACS8#PBF	LT1793ACS8#TRPBF	LT1793AIN8#PBF	LT1793AIS8#PBF	LT1793AIS8#TRPBF	LT1793CN8#PBF	LT1793CS8#PBF	LT1793CS8#TRPBF	LT1793IN8#PBF	LT1793IS8#PBF	LT1793IS8#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Design Notes

Download
24-Bit ADC Measures from DC to Daylight &mdash DN219
PDF, 76 Kb, File published: Dec 1, 1999
Extract from the document
24-Bit ADC Measures from DC to Daylight вЂ“ Design Note 219
Derek Redmayne
The need to measure a wide variety of physical phenomena is increasingly important in intelligent sensors. The
following circuit gives eight examples of the п¬‚exibility of
the LTC В®2408 for sensing real world phenomena. The
eight inputs of the LTC2408 are used here in a variety
of ways that would not be practical without the dynamic
range of the LTC2408.
GUARD RING 5V ELECTROMETER
INPUT
(pH, PIEZO) 3 7 + 2 R5
5k, 1% 6 LT1793 All of the examples shown use single-ended sensing
and an absolute minimum of external circuitry. Inputs
to the circuit shown range from high voltage DC to
ultraviolet light. Output data represents amplitude or
power levels for signals in all the AC inputs.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
DC
VOLTMETER
INPUT
1mV TO 1000V R1 …
Download
LT1806: 325MHz Low Noise Rail-to-Rail SOT-23 Op Amp Saves Board Space &mdash DN254
PDF, 76 Kb, File published: Apr 1, 2001
Extract from the document
325MHz Low Noise Rail-to-Rail SOT-23 Op Amp
Saves Board Space вЂ“ Design Note 254
Glen Brisebois
The new tiny LTВ®1806 combines 325MHz gain bandwidth, 3.5nV/в€љHz voltage noise, 100ОјV input offset
voltage and rail-to-rail inputs and outputs in a SOT-23
package. The device is fully speciп¬Ѓed on 3V, 5V and
В±5V supplies with a guaranteed maximum input offset
voltage of 850ОјV at either rail over temperature. It is
available in commercial and industrial temperature
grades.
1MО© Transimpedance Ampliп¬Ѓer Achieves Near
Theoretical Noise Performance with Large-Area
Photodiodes
The circuit of Figure 1 shows the LT1806 in an ultralow
noise transimpedance ampliп¬Ѓer applied to a large-area
high capacitance photodiode. The LT1806 is used for its
high gain bandwidth and low noise. The IFN147 ultralow
noise JFET1 operates at its IDSS (VGS = 0V) with a typical
transconductance of 40mS. With its source grounded,
the JFET and its drain resistor, R52, set a voltage gain
of about 8. The combination of the ultralow noise JFET
gain stage and the LT1806 low noise ampliп¬Ѓer achieves
the ultralow input noise performance. The circuitвЂ™s input …

Articles

Download
1MW Transimpedance Amplifier Achieves Near-Theoretical Noise Performance, 2.4GHz Gain Bandwidth, with Large-Area Photodiodes &mdash LT Journal
PDF, 153 Kb, File published: May 1, 2001
Extract from the document
DESIGN IDEAS 1Mв„¦ Transimpedance Amplifier
Achieves Near-Theoretical Noise
Performance, 2.4GHz Gain Bandwidth,
with Large-Area Photodiodes by Glen Brisebois
transimpedance circuitвЂ™s noise gain,
which applies to voltage noise but not
to current noise or resistor noise,
rises drastically with frequency (noise
gain = 1+ ZF/XC). As a sample calculation, a 500pF photodiode has an
impedance of 3.2k at 100kHz, giving
a 1Mв„¦ transimpedance circuit a noise
gain of 314 at that frequency. The
theoretical noise floor of the 1M
resistor is 130nV/в€љHz (at room temperature), so any input voltage noise
above 0.41nV/в€љHz (130nV/в€љHz/314)
will overtake the resistor noise at
100kHz. Discrete JFETs are available
with ultralow voltage noise but they
have high input capacitance (75pF
max for the IFN147). Serendipitously,
the input capacitance of the JFET is
relatively insignificant compared to
the 500pF of the example large-area …
Download
Four New Amplifiers Serve Many Applications &mdash LT Journal
PDF, 100 Kb, File published: Sep 1, 1999
Extract from the document
LINEAR TECHNOLOGY
SEPTEMBER 1999 IN THIS ISSUEвЂ¦
Four New Amplifiers
Serve Many Applications . 1
Issue Highlights . 2
LTCВ® in the NewsвЂ¦ . 2
DESIGN FEATURES
JFET Op Amps Equal Low Noise
Bipolars and Have Picoamp
Current Noise . 3
Alexander Strong LTВ®1813: 100MHz, 750V/Вµ s Amplifier
Draws Only 3mA . 5
George Feliz Micropower, Precision Current Sense
Amplifier Operates from 2.5V to 60V
. 7
Richard Markell, Glen Brisebois and
Jim Mahoney Triple 300MHz Current Feedback
Amplifiers Drive RGB/Component
Video and LCD Displays . 12
Brian Hamilton LTC1702/LTC1703 Switching
Regulator Controllers Set a New
Standard for Transient Response
. 16 …
Download
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 …

Model Line

Series: LT1793 (12)

LT1793ACN8#PBF LT1793ACS8#PBF LT1793ACS8#TRPBF LT1793AIN8#PBF LT1793AIS8#PBF LT1793AIS8#TRPBF LT1793CN8#PBF LT1793CS8#PBF LT1793CS8#TRPBF LT1793IN8#PBF LT1793IS8#PBF LT1793IS8#TRPBF

Manufacturer's Classification

Signal Conditioning > Amplifiers > Operational Amplifiers (Op Amps) > Low Bias Current Amplifiers (Ib < 100pA) | JFET Input Amplifiers | High Voltage Amplifiers (>12V)