INA128UA Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
INA128UA is a precision instrumentation amplifier from Texas Instruments featuring 130-dB CMRR, 1.3 MHz bandwidth, and only 700 µA supply current. Ideal for medical, industrial, and data acquisition applications. From $7.16, in stock, worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- INA128UA Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $7.1600(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of INA128UA?
- 130-dB CMRR (min 120 dB) for excellent common-mode noise rejection
- Ultra-low 700 µA quiescent current for power-sensitive designs
- Wide 1.3 MHz bandwidth (3 dB) supporting high-speed signal conditioning
- Low input offset voltage max 50 µV ensuring high measurement accuracy
- Single-resistor gain setting from 1 to 10,000 V/V
What is INA128UA used for?
The INA128UA is widely used in medical instrumentation such as ECG and EEG front-end amplifiers where high CMRR and low power are critical. It also serves industrial data acquisition systems, bridge sensor amplifiers for strain gauges and pressure transducers, and thermocouple signal conditioning circuits requiring precise, low-noise amplification.
What are the specifications of INA128UA?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Amplifier Type | INSTRUMENTATION AMPLIFIER |
| Average Bias Current-Max (IIB) | 0.01 µA |
| Bandwidth (3dB)-Nom | 1.3MHz |
| Bias Current-Max (IIB) @25C | 0.005 µA |
| Common-mode Reject Ratio-Min | 120dB |
| Input Offset Current-Max (IIO) | 0.01 µA |
| Input Offset Voltage-Max | 50 µV |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Neg Supply Voltage Limit-Max | -18 V |
| Neg Supply Voltage-Nom (Vsup) | -15 V |
| Non-linearity-Max | 0.004% |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Slew Rate-Nom | 4V/us |
| Subcategory | Instrumentation Amplifier |
| Supply Current-Max | 0.75mA |
| Supply Voltage Limit-Max | 18V |
| Supply Voltage-Nom (Vsup) | 15V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Gain-Max | 10000 |
| Voltage Gain-Min | 1 |
| Voltage Gain-Nom | 10 |
| ## INA128UA Alternates Showing results | Image |
| 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 |
| Country of Origin | Malaysia |
Where can I find the INA128UA datasheet?
INA128UA Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for INA128UA?
Compatible alternatives and drop-in replacements for INA128UA:
Amplifier, 1 Func, 50uV Offset-Max, 1.3MHz Band Width, BIPolar, PDSO8
suggested
suggested
suggested
suggested
suggested
Frequently Asked Questions
What is the gain range of the INA128UA?
The INA128UA supports a gain range of 1 to 10,000 V/V, set by a single external resistor connected between pins 1 and 8. No internal resistors need to be matched, ensuring excellent gain accuracy.
What is the CMRR of the INA128UA and why does it matter?
The INA128UA achieves a typical CMRR of 130 dB and a minimum of 120 dB. This outstanding common-mode rejection ensures that noise and interference common to both inputs — such as 50/60 Hz power-line hum — are effectively suppressed, making it ideal for low-level signal measurement in noisy environments.
What are the typical applications for the INA128UA?
The INA128UA is commonly used in medical equipment (ECG, EEG), industrial process control, bridge amplifiers for strain gauges and load cells, thermocouple amplifiers, and precision data acquisition systems that require low noise and high accuracy differential amplification.
What package does the INA128UA come in?
The INA128UA is available in an 8-pin Small Outline (SOIC) package, which is compact and suitable for surface-mount PCB designs. Texas Instruments also offers the INA128P in an 8-pin DIP package for through-hole applications.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $12.5183 | $12.52 |
| 3+ | $11.6838 | $35.05 |
| 5+ | $8.9800 | $44.90 |
| 10+ | $8.3300 | $83.30 |
| 25+ | $7.4400 | $186.00 |
| 75+ | $7.1600 | $537.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit