INA128UAIn StockTexas Instruments
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
Key Features
- 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
Applications
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.
Specifications
| 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 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for INA128UA:
Amplifier, 1 Func, 50uV Offset-Max, 1.3MHz Band Width, BIPolar, PDSO8
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.
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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 |
|---|---|---|
| 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 |
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