Datasheet Linear Technology LT1168

Manufacturer	Linear Technology
Series	LT1168

Low Power, Single Resistor Gain Programmable, Precision Instrumentation Amplifier

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PDF, 353 Kb, Language: en, File uploaded: Aug 6, 2017, Pages: 20
Low Power, Single Resistor Gain Programmable, Precision Instrumentation Amplifier

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Packaging

	LT1168ACN8#PBF	LT1168ACS8#PBF	LT1168ACS8#TRPBF	LT1168AIN8#PBF	LT1168AIS8#PBF	LT1168AIS8#TRPBF	LT1168CN8#PBF	LT1168CS8#PBF	LT1168CS8#TRPBF	LT1168IN8#PBF	LT1168IS8#PBF	LT1168IS8#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	LT1168ACN8#PBF	LT1168ACS8#PBF	LT1168ACS8#TRPBF	LT1168AIN8#PBF	LT1168AIS8#PBF	LT1168AIS8#TRPBF	LT1168CN8#PBF	LT1168CS8#PBF	LT1168CS8#TRPBF	LT1168IN8#PBF	LT1168IS8#PBF	LT1168IS8#TRPBF
Common Mode Rejection Ratio, dB	140	140	140	140	140	140	140	140	140	140	140	140
Number of Channels	1	1	1	1	1	1	1	1	1	1	1	1
Cload, pF	1000	1000	1000	1000	1000	1000	1000	1000	1000	1000	1000	1000
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 Density, nV/rtHz	10	10	10	10	10	10	10	10	10	10	10	10
Export Control	no	no	no	no	no	no	no	no	no	no	no	no
GBW, MHz	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4
Gain, V/V	Resistor Set 1 to 10,000	Resistor Set 1 to 10,000	Resistor Set 1 to 10,000	Resistor Set 1 to 10,000	Resistor Set 1 to 10,000	Resistor Set 1 to 10,000	Resistor Set 1 to 10,000	Resistor Set 1 to 10,000	Resistor Set 1 to 10,000	Resistor Set 1 to 10,000	Resistor Set 1 to 10,000	Resistor Set 1 to 10,000
Gain Accuracy, %	0.008	0.008	0.008	0.008	0.008	0.008	0.008	0.008	0.008	0.008	0.008	0.008
Gain Drift, ppm/C	100	100	100	100	100	100	100	100	100	100	100	100
Ibias, nA	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04
Inoise, pA/rtHz	0.074	0.074	0.074	0.074	0.074	0.074	0.074	0.074	0.074	0.074	0.074	0.074
Ios, µA	0.00005	0.00005	0.00005	0.00005	0.00005	0.00005	0.00005	0.00005	0.00005	0.00005	0.00005	0.00005
Iout, mA	32	32	32	32	32	32	32	32	32	32	32	32
Isupply, mA	0.35	0.35	0.35	0.35	0.35	0.35	0.35	0.35	0.35	0.35	0.35	0.35
LF Enoise, µVPP	0.28	0.28	0.28	0.28	0.28	0.28	0.28	0.28	0.28	0.28	0.28	0.28
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
PSRR, dB	150	150	150	150	150	150	150	150	150	150	150	150
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	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5
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
Ts (0.1%), ns	30000	30000	30000	30000	30000	30000	30000	30000	30000	30000	30000	30000
Type	IA	IA	IA	IA	IA	IA	IA	IA	IA	IA	IA	IA
Voh (from V+), V	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2
Vol (from V-), V	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9
Vos, µV	15	15	15	15	15	15	15	15	15	15	15	15
Vos TC, µV/C	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05
Vs Max, V	40	40	40	40	40	40	40	40	40	40	40	40
Vs Min, V	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6

Eco Plan

	LT1168ACN8#PBF	LT1168ACS8#PBF	LT1168ACS8#TRPBF	LT1168AIN8#PBF	LT1168AIS8#PBF	LT1168AIS8#TRPBF	LT1168CN8#PBF	LT1168CS8#PBF	LT1168CS8#TRPBF	LT1168IN8#PBF	LT1168IS8#PBF	LT1168IS8#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Articles

Download
Measure Resistances Easily, without Reference Resistor or Current Source &mdash LT Journal
PDF, 154 Kb, File published: May 1, 2000
Extract from the document
DESIGN IDEAS Measure Resistances Easily, without
Reference Resistor or Current Source
by Glen Brisebois
Measuring the resistance of a
device, for example a thermistor, usually requires biasing it with a precision
current source or combining it with
several other precision resistors in a
bridge. The circuit of Figure 1 shows
how to use the new LT1168 instrumentation amplifier to achieve a
precision resistance-to-voltage conversion as simply as possible.
Normally, the resistor across pins 1
and 8 is the gain-set resistor and the
voltage across pins 3 and 2 is the
variable to be measured. In this case, however, the 1.25V reference establishes a fixed input voltage so that the
variable to be measured is now the
resistance. The equation for VOUT vs
RT is VOUT = 1.25V 49.4kв„¦/RT. Given
the limitation on output swing (with
the supply voltages shown), the smallest measurable resistance is about
4.5k. The highest resolvable resistance is limited to about 200M by the
300ВµV output offset voltage of the
LT1168. The 0.05% accuracy of the
LT1634 is not an issue here, because …
Download
New Instrumentation Amplifier: Single-Resistor Gain Set and Precision Front End Make Accuracy Easy &mdash LT Journal
PDF, 159 Kb, File published: May 1, 2000
Extract from the document
DESIGN FEATURES New Instrumentation Amplifier: SingleResistor Gain Set and Precision Front
End Make Accuracy Easy
by Glen Brisebois
The LT1168 is a low power,
single-resistor gain-programmable
instrumentation amplifier that is easy
to apply. It is a pin-compatible upgrade
for the AD620 (and the INA118 with a
resistor-value change) and is available in C and I grades. With negligible
60ВµV (Max) offset voltage and ultrahigh 1Tв„¦ input impedance, it can
sense bridges with source impedances
from 10в„¦ to 100k without degrading
the signal. Its 120dB CMRR at 60Hz
(AV = 100V) is achieved even with a 1k
source impedance imbalance. Matching the LT1168вЂ™s CMRR using discrete
op amps would require the use of
0.001% resistors. The LT1168вЂ™s
robust inputs meet IEC1000-4-2
Level 4 ESD tests with the addition of
two external 5k series resistors. These
5k resistors will contribute only a
negligible 6ВµV of DC error. Table 1. Examples of series resistors for precision gain Desired Gain RG
(Theoretical) RG1 …

Model Line

Series: LT1168 (12)

LT1168ACN8#PBF LT1168ACS8#PBF LT1168ACS8#TRPBF LT1168AIN8#PBF LT1168AIS8#PBF LT1168AIS8#TRPBF LT1168CN8#PBF LT1168CS8#PBF LT1168CS8#TRPBF LT1168IN8#PBF LT1168IS8#PBF LT1168IS8#TRPBF

Manufacturer's Classification

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