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LT1168
PRODUCTIONLow Power, Single Resistor Gain Programmable, Precision Instrumentation Amplifier
- Part Models
- 12
- 1ku List Price
- Starting From $4.56
Part Details
- Supply Current: 530µA Max
- Meets IEC 1000-4-2 Level 4 (±15kV) ESD Tests with Two External 5k Resistors
- Single Gain Set Resistor: G = 1 to 10,000
- Gain Error: G = 10, 0.4% Max
- Input Offset Voltage Drift: 0.3µV/°C Max
- Gain Nonlinearity: G = 10, 20ppm Max
- Input Offset Voltage: 40µV Max
- Input Bias Current: 250pA Max
- PSRR at AV =1: 103dB Min
- CMRR at AV = 1: 90dB Min
- Wide Supply Range: ±2.3V to ±18V
- 1kHz Voltage Noise: 10nV/√Hz
- 0.1Hz to 10Hz Noise: 0.28µVP-P
- Available in 8-Pin PDIP and SO Packages
The LT1168 is a micropower, precision instrumentation amplifier that requires only one external resistor to set gains of 1 to 10,000. The low voltage noise of 10nV/√Hz (at 1kHz) is not compromised by low power dissipation (350µA typical for ±15V supplies). The wide supply range of ±2.3V to ±18V allows the LT1168 to fit into a wide variety of industrial as well as battery-powered applications.
The high accuracy of the LT1168 is due to a 20ppm maximum nonlinearity and 0.4% max gain error (G = 10). Previous monolithic instrumentation amps cannot handle a 2k load resistor whereas the nonlinearity of the LT1168 is specified for loads as low as 2k. The LT1168 is laser trimmed for very low input offset voltage (40µV max), drift (0.3µV/°C), high CMRR (90dB, G = 1) and PSRR (103dB, G = 1). Low input bias currents of 250pA max are achieved with the use of superbeta processing. The output can handle capacitive loads up to 1000pF in any gain configuration while the inputs are ESD protected up to 13kV (human body). The LT1168 with two external 5k resistors passes the IEC 1000-4-2 level 4 specification.
The LT1168 is a pin-for-pin improved second source for the AD620 and INA118. The LT1168, offered in 8-pin PDIP and SO packages, requires significantly less PC board area than discrete op amp resistor designs. These advantages make the LT1168 the most cost effective solution for precision instrumentation amplifier applications.
Applications
- Bridge Amplifiers
- Strain Gauge Amplifiers
- Thermocouple Amplifiers
- Differential to Single-Ended Converters
- Differential Voltage to Current Converters
- Data Acquisition
- Battery-Powered and Portable Equipment
- Medical Instrumentation
- Scales
Documentation
Data Sheet 1
Reliability Data 1
Technical Articles 1
LT Journal 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT1168ACN8#PBF | 8-Lead PDIP (Narrow 0.3 Inch) | ||
| LT1168ACS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1168ACS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1168AIN8#PBF | 8-Lead PDIP (Narrow 0.3 Inch) | ||
| LT1168AIS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1168AIS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1168CN8#PBF | 8-Lead PDIP (Narrow 0.3 Inch) | ||
| LT1168CS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1168CS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1168IN8#PBF | 8-Lead PDIP (Narrow 0.3 Inch) | ||
| LT1168IS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1168IS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
| No Match Found | ||
|
Oct 8, 2024 - 24_0234 Migrating Bottom Trace Code Marking to Top Side Laser Marking for PDIP Package |
||
| LT1168ACN8#PBF | PRODUCTION | |
| LT1168AIN8#PBF | PRODUCTION | |
| LT1168CN8#PBF | PRODUCTION | |
| LT1168IN8#PBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0241 Epoxy Change from Henkel 8290 to 8290A for PDIP Package |
||
| LT1168ACN8#PBF | PRODUCTION | |
| LT1168AIN8#PBF | PRODUCTION | |
| LT1168CN8#PBF | PRODUCTION | |
| LT1168IN8#PBF | PRODUCTION | |
|
Aug 6, 2022 - 22_0172 Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG] |
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| LT1168ACN8#PBF | PRODUCTION | |
| LT1168AIN8#PBF | PRODUCTION | |
| LT1168CN8#PBF | PRODUCTION | |
| LT1168IN8#PBF | PRODUCTION | |
|
Oct 8, 2024 - 24_0236 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package |
||
| LT1168ACS8#PBF | PRODUCTION | |
| LT1168ACS8#TRPBF | PRODUCTION | |
| LT1168AIS8#PBF | PRODUCTION | |
| LT1168AIS8#TRPBF | PRODUCTION | |
| LT1168CS8#PBF | PRODUCTION | |
| LT1168CS8#TRPBF | PRODUCTION | |
| LT1168IS8#PBF | PRODUCTION | |
| LT1168IS8#TRPBF | PRODUCTION | |
|
Oct 12, 2022 - 22_0254 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2) |
||
| LT1168ACS8#PBF | PRODUCTION | |
| LT1168ACS8#TRPBF | PRODUCTION | |
| LT1168AIS8#PBF | PRODUCTION | |
| LT1168AIS8#TRPBF | PRODUCTION | |
| LT1168CS8#PBF | PRODUCTION | |
| LT1168CS8#TRPBF | PRODUCTION | |
| LT1168IS8#PBF | PRODUCTION | |
| LT1168IS8#TRPBF | PRODUCTION | |
|
Jun 11, 2021 - 21_0060 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LT1168ACS8#PBF | PRODUCTION | |
| LT1168ACS8#TRPBF | PRODUCTION | |
| LT1168AIS8#PBF | PRODUCTION | |
| LT1168AIS8#TRPBF | PRODUCTION | |
| LT1168CS8#PBF | PRODUCTION | |
| LT1168CS8#TRPBF | PRODUCTION | |
| LT1168IS8#PBF | PRODUCTION | |
| LT1168IS8#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT1168
In-Amp Diamond Plot Tool
The Diamond Plot Tool is a web application that generates a configuration-specific Output Voltage Range vs. Input Common-Mode Voltage graph, also known as the Diamond Plot, for Analog Devices Instrumentation Amplifiers. Based on user inputs such as supply voltage, gain, and input signal range, the tool detects saturation and recommends in-amps for which the input signal is in-range and the configuration is valid. Avoid saturation, find the best in-amp for your design, and save time.
Open ToolLTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
AD62x, AD822x, AD842x Series InAmp Evaluation Board