INA129SJD Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The INA129SJD is a precision instrumentation amplifier from Texas Instruments with 113 dB minimum CMRR, 125 µV maximum offset voltage, and 1.3 MHz bandwidth. It is designed for accurate differential signal amplification in sensor and medical applications via an 8-pin ceramic DIP package. From $12.50, in stock, worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- INA129SJD Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 210.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of INA129SJD?
- 113 dB minimum common-mode rejection ratio for rejecting noise and interference in differential sensor signal chains
- 125 µV maximum input offset voltage and 0.01 µA bias current enabling high-accuracy millivolt-level signal amplification
- 1.3 MHz bandwidth supporting precise gain-bandwidth tradeoffs in medical, industrial, and data acquisition instrumentation
What is INA129SJD used for?
The INA129SJD is used in precision bridge amplifier circuits for strain gauge and load cell measurement, where its 113 dB CMRR suppresses common-mode noise from long cable runs in industrial environments. Its 125 µV maximum offset and 0.01 µA input bias current make it ideal for medical biosignal acquisition, ECG front ends, and electrochemical sensor interfaces operating at sub-millivolt signal levels. It is also a strong choice for data acquisition front ends in test and measurement instruments requiring stable, high-accuracy differential amplification up to 1.3 MHz.
What are the specifications of INA129SJD?
| 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 | 0.01 µA |
| Common-mode Reject Ratio-Min | 113dB |
| Input Offset Current-Max (IIO) | 0.01 µA |
| Input Offset Voltage-Max | 125 µV |
| JESD-30 Code | R-GDIP-T8 |
| Neg Supply Voltage Limit-Max | -18 V |
| Neg Supply Voltage-Nom (Vsup) | -15 V |
| Non-linearity-Max | 0.002% |
| Number of Functions | 1 |
| Package Body Material | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Qualification Status | Not Qualified |
| Slew Rate-Nom | 4V/us |
| Supply Current-Max | 0.75mA |
| Supply Voltage Limit-Max | 18V |
| Supply Voltage-Nom (Vsup) | 15V |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Temperature Grade | MILITARY |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Voltage Gain-Max | 10000 |
| Voltage Gain-Min | 1 |
| Voltage Gain-Nom | 10 |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Where can I find the INA129SJD datasheet?
INA129SJD Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for INA129SJD?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What CMRR does the INA129SJD provide and why does it matter for bridge sensor amplification?
The INA129SJD achieves a minimum CMRR of 113 dB, meaning common-mode interference on the two input lines is attenuated by over 100,000:1 before reaching the output. This is critical for bridge sensor amplifiers connected to strain gauges or load cells via long cables, where 50 Hz or 60 Hz power-line noise appears as a large common-mode signal that must be rejected to recover the small differential bridge output voltage.
How does the INA129SJD's 0.01 µA bias current benefit electrochemical and biosignal sensor interfaces?
The INA129SJD's 0.01 µA maximum input bias current minimizes the voltage error developed across high-impedance electrochemical sensors and biopotential electrodes. For a 1 MΩ source impedance, this bias current contributes only 10 µV of offset error, well below the 125 µV maximum offset spec, making the INA129SJD suitable for ECG, EEG, and pH electrode front ends where source impedance can reach hundreds of kilohms.
For a precision industrial temperature measurement design, how should gain be set on the INA129SJD?
On the INA129SJD, gain is set by connecting a single external resistor between the RG pins (pins 1 and 8 on the 8-pin DIP); gain is calculated as G = 1 + 49.4 kΩ/RG. For example, a 549 Ω resistor sets a gain of approximately 91, amplifying a 5 mV thermocouple signal to approximately 455 mV, which is within the input range of most 12-bit to 16-bit ADCs used in industrial temperature transmitters.
How does the ceramic DIP package of the INA129SJD affect its use in prototype instrumentation?
The INA129SJD's 8-pin ceramic DIP (R-GDIP-T8) package is directly breadboard- and DIP-socket-compatible, enabling engineers to evaluate and prototype precision amplifier circuits without custom PCBs, which speeds up initial design validation in lab instruments and low-volume medical device prototypes before committing to a surface-mount layout.
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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.
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