INA143UG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
INA143UG4 is a precision difference amplifier IC by Texas Instruments in an 8-pin SOIC package. Key specs: 86 dB min CMRR, ±18 V supply, 500 µV max input offset voltage. From $3.50 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- INA143UG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of INA143UG4?
- High 86 dB minimum CMRR (96 dB typical) for accurate differential signal extraction in noisy environments
- Wide ±18 V (36 V total) supply range enabling bipolar signal amplification in industrial measurement circuits
- Internal precision resistors with laser-trimmed matching for fixed gain without external resistor networks
What is INA143UG4 used for?
INA143UG4 is used in industrial current sensing, motor control feedback, and battery stack monitoring where accurate differential voltage measurement over a common-mode range is critical. Its 86 dB minimum CMRR makes it suitable for rejecting ground-loop noise in long cable runs between sensors and signal conditioning boards. The 8-pin SOIC package simplifies layout in compact analog front-end designs for data acquisition systems and medical instrumentation.
What are the specifications of INA143UG4?
| YTEOL | 0 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | VOLTAGE-FEEDBACK |
| Common-mode Reject Ratio-Min | 86dB |
| Common-mode Reject Ratio-Nom | 96dB |
| Frequency Compensation | YES |
| Input Offset Voltage-Max | 500 µV |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Low-Bias | NO |
| Low-Offset | YES |
| Micropower | NO |
| Neg Supply Voltage Limit-Max | -18 V |
| Neg Supply Voltage-Nom (Vsup) | -5 V |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Power | NO |
| Programmable Power | NO |
| Qualification Status | Not Qualified |
| Slew Rate-Nom | 5V/us |
| Supply Current-Max | 1.2mA |
| Supply Voltage Limit-Max | 18V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Wideband | NO |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Where can I find the INA143UG4 datasheet?
INA143UG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for INA143UG4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the CMRR specification of INA143UG4 and why does it matter for differential measurement?
INA143UG4 specifies a minimum CMRR of 86 dB and typical CMRR of 96 dB. This means common-mode interference such as 50 Hz or 60 Hz mains noise coupled onto both input lines is attenuated by at least 86 dB relative to the differential signal, allowing measurement of millivolt-level differential signals riding on common-mode voltages up to the supply rail without significant error.
What supply voltage range does INA143UG4 support, and what is its maximum input offset voltage?
INA143UG4 operates from a split supply of ±18 V (36 V total single-supply equivalent), covering standard ±15 V industrial analog supply rails. The maximum input offset voltage is 500 µV, which determines the minimum detectable differential signal. For a gain of 10 V/V, a 500 µV offset introduces a 5 mV output error, acceptable in many industrial sensing applications.
Which current-sensing or voltage-monitoring applications benefit from INA143UG4's fixed internal gain?
INA143UG4 uses internally matched laser-trimmed resistors to set a fixed gain of 10 V/V or 0.1 V/V (depending on configuration), eliminating the gain error and temperature drift caused by external resistor mismatch. This makes it preferred in battery cell voltage monitoring, motor back-EMF sensing, and bridge transducer amplification where gain accuracy of better than 0.05% is needed without calibration.
How does INA143UG4 compare to using a standard op-amp with 4 external resistors for a difference amplifier?
A discrete op-amp difference amplifier requires 4 resistors matched to within 0.01% to achieve 86 dB CMRR, adding cost and requiring careful layout to minimize mismatch from solder variations and temperature gradients. INA143UG4 integrates all 4 laser-trimmed resistors on-chip with a guaranteed 86 dB minimum CMRR over the full temperature range, reducing BOM from 5 components to 1 and saving PCB area compared to an 8-pin op-amp plus 4 discrete resistors.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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