INA327EA/250 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
INA327EA/250 is a precision CMOS instrumentation amplifier with shutdown, offering 100 dB minimum CMRR and 100 µV maximum input offset voltage. It features low 2 nA input bias current, a fixed gain, and a power-saving shutdown pin in a 10-pin SOIC package. Ideal for precision sensor signal amplification in low-power portable and industrial systems.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 10
- Lifecycle
- ACTIVE
- Datasheet
- INA327EA/250 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.3100(MOQ 2)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 100 dB minimum CMRR enabling accurate differential signal extraction in noisy environments
- 2 nA ultra-low input bias current minimizing measurement error in high-impedance sensor circuits
- Shutdown pin reduces supply current for power-efficient portable and battery-powered designs
Applications
The INA327EA/250 is suited for precision bridge sensor amplification in weigh scales, pressure measurement, and strain gauge systems requiring high CMRR and low drift. Its shutdown capability makes it effective in duty-cycled portable instruments and medical monitoring devices where power consumption must be minimized between measurements. It is also used in industrial data acquisition front ends where the 100 µV offset voltage and stable CMOS architecture ensure accurate readings across temperature.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Amplifier Type | INSTRUMENTATION AMPLIFIER |
| Average Bias Current-Max (IIB) | 0.002 µA |
| Bandwidth (3dB)-Nom | 0.001MHz |
| Bias Current-Max (IIB) @25C | 0.002 µA |
| Common-mode Reject Ratio-Min | 100dB |
| Input Offset Current-Max (IIO) | 0.002 µA |
| Input Offset Voltage-Max | 100 µV |
| JESD-30 Code | S-PDSO-G10 |
| JESD-609 Code | e4 |
| Non-linearity-Max | 0.01% |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP10,.19,20 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max | 3.7mA |
| Supply Voltage Limit-Max | 5.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold/Silver (Ni/Pd/Au/Ag) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Gain-Max | 1000 |
| Voltage Gain-Min | 0.1 |
| Voltage Gain-Nom | 100 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the 100 dB CMRR of the INA327EA/250 improve measurement accuracy in bridge sensor circuits?
A 100 dB minimum CMRR means common-mode noise of 1V on both inputs produces only 10 µV of differential error at the output, which is below the 100 µV input offset voltage spec. In a Wheatstone bridge driven at 5V where power-line noise coupling can reach hundreds of millivolts, this rejection prevents noise from masking small differential signals corresponding to fractions of a millivolt per volt of bridge excitation.
In a duty-cycled temperature logger, how does the shutdown pin of the INA327EA/250 extend battery life?
Asserting the shutdown pin reduces the INA327EA/250 supply current to typically under 1 µA, compared to normal operating current of several hundred µA, a reduction of over 100 times. In a logger sampling once per minute, the amplifier can be shut down for 59 of every 60 seconds, cutting its average current contribution to under 5 µA and extending a 1000 mAh battery life by several months compared to always-on operation.
How does the 2 nA input bias current of the INA327EA/250 reduce offset errors when interfacing with high-impedance sensors?
With a source impedance of 1 MΩ, a 2 nA bias current produces only 2 mV of additional input offset voltage — small enough to stay within calibration range for most sensors. By contrast, bipolar instrumentation amplifiers with 100 nA to 1 µA bias current would introduce 100 mV to 1 V offset at the same source impedance, requiring additional offset correction circuitry or lower source impedance.
For a precision weigh scale design, what makes the INA327EA/250 a compact and accurate front-end choice over discrete op amp topologies?
A discrete 3-op-amp instrumentation amplifier requires external precision resistors matched to 0.01% or better to achieve 80 dB CMRR, while the INA327EA/250 delivers 100 dB minimum CMRR with internal laser-trimmed resistors in a single 10-pin SOIC measuring under 6 mm x 4 mm. This reduces BOM by 6 to 8 resistors, eliminates resistor matching during assembly, and improves CMRR consistency across the full operating temperature range.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 2+ | $4.6520 | $9.30 |
| 10+ | $4.4990 | $44.99 |
| 25+ | $4.3460 | $108.65 |
| 250+ | $4.1650 | $1041.25 |
| 500+ | $3.5000 | $1750.00 |
| 1000+ | $3.3100 | $3310.00 |
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