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Texas Instruments INA101KUE4
- Part No.:
- INA101KUE4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
INA101KUE4.pdf
- Description:
- IC INST AMP 1 CIRCUIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,715
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Product details
Overview
INA101KUE4 from Texas Instruments (formerly Burr-Brown) is a high-accuracy instrumentation amplifier optimized for low-level signal conditioning in precision measurement systems. It delivers 0.25µV/°C max drift, 25µV max input offset voltage, and 0.002% nonlinearity, with gain programmable from 1 to 1000 via external resistor RG. It is used in strain gage bridges and thermocouple front-ends requiring stable DC performance and high CMR.
For engineers reviewing the INA101KUE4 datasheet, INA101KUE4 pinout, INA101KUE4 application, or INA101KUE4 equivalent, key selection criteria include guaranteed gain accuracy over temperature, laser-trimmed internal resistors, SOL-16 surface-mount packaging, and verified 106dB CMR at 60Hz with G=10.
Technical Context
The INA101KUE4 integrates three precision op amps and laser-trimmed metal-film resistors on a single monolithic IC to achieve high common-mode rejection and low gain drift. Its architecture uses a three-op-amp topology with matched internal 10kΩ and 20kΩ feedback networks, enabling precise gain setting via a single external RG resistor per the equation G = 1 + 40kΩ/RG.
It supports dual ±15V operation (±5V to ±20V range), delivers ±12.5V rated output swing into 2kΩ, and maintains 0.002% nonlinearity up to full-scale output. The SOL-16 package includes dedicated Gain Sense 1/2 and Offset Adjust pins to minimize wiring-induced gain error and enable fine input offset trimming at high gains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 1000 V/V - set by single external RG resistor; enables flexible signal scaling without complex feedback networks. |
| Input Offset Voltage | ±25 µV max - ensures minimal DC error in low-amplitude sensor outputs like RTDs or microvolt-level thermocouples. |
| Offset Drift | 0.25 µV/°C max - guarantees stable baseline under ambient temperature fluctuations in industrial enclosures. |
| CMR @ 60Hz | 106 dB at G=10 - rejects power-line interference in noisy plant-floor or medical environments. |
| Nonlinearity | 0.002% of p-p FS - preserves fidelity in high-resolution data acquisition where harmonic distortion must be minimized. |
| Input Impedance | 10¹⁰ Ω || 3 pF - prevents loading of high-Z sources such as piezoelectric sensors or remote transducer bridges. |
| Supply Range | ±5V to ±20V - accommodates legacy ±15V rails and modern low-voltage systems with headroom for transient suppression. |
Pinout & Package
SOL-16 surface-mount package (SOIC-DW, 16-pin), RoHS-compliant, MSL Level-3, 260°C peak reflow, designed for automated assembly and thermal reliability in industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | NC | No connection - unused pins; must remain unconnected to avoid parasitic coupling or latch-up risk. |
| 2 | +VCC | Positive supply rail - requires local 1µF tantalum decoupling to suppress high-frequency noise from shared power domains. |
| 3 | –Input | Inverting input terminal - differential input node; sensitive to layout symmetry and guard ringing for optimal CMR. |
| 4 | Gain Sense 1 | Feedback sense point - connects directly to RG to eliminate socket/wiring resistance errors at G ≥ 100. |
| 5 | Gain Set 1 | RG connection node - forms half of gain-setting network; paired with Pin 4 to define closed-loop gain precisely. |
| 6, 7 | Offset Adjust | Input offset trim terminals - accept 100kΩ potentiometer for nulling input offset at G ≥ 100; not for system-level offset correction. |
| 8 | Common | Output reference node - must be tied to low-impedance ground (<0.1Ω) to maintain >106dB CMR performance. |
| 9 | –VCC | Negative supply rail - requires symmetric decoupling to match +VCC and prevent PSRR degradation. |
| 10 | Output | Differential output referenced to Common - drives ADC inputs or downstream stages with ±12.5V swing capability. |
| 11 | +Input | Non-inverting input terminal - primary high-Z sensor interface; matched layout critical for common-mode rejection. |
| 12 | Gain Sense 2 | Secondary feedback sense - completes Kelvin connection for RG; used with Pin 13 to reject lead resistance effects. |
| 13 | Gain Set 2 | RG return node - completes gain-setting loop; ensures accurate G = 1 + 40kΩ/RG even with trace resistance. |
| 14, 15 | A2 Output / A1 Output | Internal op-amp outputs - not user-accessible; reserved for internal signal routing and unavailable for external use. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed resistor network | On-chip 10kΩ/20kΩ metal-film resistors trimmed to <0.1% absolute tolerance, eliminating external precision resistor requirements and reducing board area. |
| Kelvin gain-setting interface | Dual Gain Sense/Gain Set pins (4/5 and 12/13) enable 4-wire RG connection, removing trace resistance impact on gain accuracy above G=100. |
| Low-drift input offset adjustment | Two-pin offset trim (Pins 6 & 7) allows post-layout calibration of input offset without degrading drift performance beyond 0.3µV/°C per 100µV adjusted. |
| High CMR with source imbalance tolerance | Maintains 90dB CMR at 60Hz even with 1kΩ source impedance mismatch - critical for unshielded long-cable sensor interfaces. |
| Stable unity-gain operation | Guaranteed stability at G=1 with no external compensation required - simplifies design for applications needing only buffering with high CMR. |
Applications
| Strain Gage Bridge Amplification | Thermocouple Signal Conditioning |
|---|---|
Use Scenario: Amplifying mV-level differential output from a Wheatstone bridge under mechanical load in structural health monitoring. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing fixed-gain (G=100–500), low-drift amplification with rejection of bridge excitation noise and EMI. Use Value: Enables 16-bit+ resolution digitization by holding offset drift ≤0.25µV/°C and nonlinearity ≤0.002%, preserving microstrain-level accuracy. | Use Scenario: Cold-junction compensated amplification of Type-K thermocouple outputs (−5mV to +60mV) across –20°C to +200°C. IC Role / Device Role / Timing Role: High-CMR front-end amplifier rejecting 60Hz pickup from heater circuits while maintaining linearity over wide temperature range. Use Value: Delivers 106dB CMR at 60Hz and 0.002% nonlinearity, allowing direct interface to 24-bit sigma-delta ADCs without additional filtering. |
| RTD Temperature Sensing | Medical Biopotential Acquisition |
Use Scenario: Exciting and measuring 100Ω/1000Ω Pt RTDs in 4-wire configuration for HVAC or process control temperature loops. IC Role / Device Role / Timing Role: Low-noise, low-drift amplifier converting small ΔR changes into clean voltage signals with minimal self-heating error. Use Value: 13nV/√Hz input noise and 25µV max offset ensure <0.01°C resolution in 0.1°C-accurate systems using 24-bit ADCs. | Use Scenario: Front-end amplification of ECG/EEG signals (0.1–5mV, <100Hz bandwidth) in portable patient monitors. IC Role / Device Role / Timing Role: High-input-impedance (10¹⁰Ω), low-bias-current amplifier rejecting common-mode electrode motion artifacts. Use Value: 10¹⁰Ω || 3pF input impedance and ±15nA bias current prevent signal attenuation and DC shift in dry-electrode configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD620ARZ | Lower quiescent current (1.3mA vs 6.7mA), wider gain range (1–10000), but higher offset drift (1µV/°C vs 0.25µV/°C). | Better suited for battery-powered portable instruments; less ideal for high-stability industrial temperature sensing. | Select AD620ARZ when ultra-low power or extended gain range outweighs need for sub-0.3µV/°C drift. |
| INA128UA | Improved CMR (120dB vs 106dB at 60Hz), lower noise (7nV/√Hz), but narrower gain range (1–10000) and no Kelvin gain-sense pins. | Preferred for EMI-heavy environments like motor drives; lacks wiring-resistance immunity for high-gain remote sensor links. | Choose INA128UA when maximum CMR and lowest noise are critical, and RG routing can be tightly controlled. |
Compared with AD620ARZ and INA128UA, the INA101KUE4 uniquely combines laser-trimmed resistor matching, Kelvin gain-sense capability, and 0.25µV/°C drift - making it optimal for fixed-installation industrial sensors where long-term calibration stability is non-negotiable.
Availability
INA101KUE4 is available at Aetrix Electronics and suitable for strain gage amplification, thermocouple signal conditioning, and RTD temperature sensing requiring stable component supply across multi-year production cycles.
Supply support for INA101KUE4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments acquired Burr-Brown in 2000 and maintains its precision analog portfolio, emphasizing high-accuracy signal chain components for industrial, medical, and test equipment markets.
The INA101 product line was developed for high-stability, low-drift instrumentation amplifier applications - specifically targeting DC-critical sensor interfaces where laser-trimmed resistors and three-op-amp topology deliver superior gain accuracy and thermal performance.
FAQ
What is the maximum operating temperature range for the INA101KUE4?
The INA101KUE4 is specified for commercial operation from 0°C to +70°C. Its SOIC (DW) package supports this range with MSL Level-3 moisture sensitivity rating and 260°C peak reflow compatibility. While the die itself operates up to +125°C (per INA101KU.A variant), the KUE4 suffix denotes the 0°C to +70°C grade, and thermal derating must be applied if ambient exceeds 70°C.
Does the INA101KUE4 require external capacitors for stability?
No, the INA101KUE4 is internally compensated and stable at unity gain without external capacitors. However, 1µF tantalum decoupling capacitors are required on both +VCC and –VCC pins, placed within 1 cm of the device, to ensure PSRR and CMR performance. Output capacitive load is rated up to 1000pF; exceeding this may cause peaking or oscillation.
Can the INA101KUE4 be used with single-supply operation?
The INA101KUE4 is designed for dual-supply operation (±5V to ±20V) and does not support true single-supply operation. Its input common-mode range extends to ±12V and output swings to ±12.5V - both referenced to the Common pin. To interface with single-supply ADCs, the Common pin must be biased at mid-supply using a low-impedance buffer, and input signals must remain within the linear input range (±10V at ±15V supplies).
How is gain set on the INA101KUE4, and what resistor tolerance is recommended?
Gain is set by a single external resistor RG connected between Pins 5 and 13, using the equation G = 1 + 40kΩ/RG. For G=100, RG = 404Ω; for G=1000, RG = 40.4Ω. A 0.1% tolerance, 25ppm/°C metal-film resistor is recommended to limit gain error contribution - since RG's TCR and tolerance directly affect overall system gain drift and accuracy per datasheet Note 1.
Is the INA101KUE4 pin-compatible with other INA101 variants like INA101HP or INA101AG?
No, the INA101KUE4 (SOL-16/SOIC-DW) is not pin-compatible with the 14-pin DIP (INA101HP, INA101AG) or 10-pin TO-100 (INA101AM) packages. While functional behavior is identical, the SOL-16 pinout includes dedicated Gain Sense 1/2 and dual Offset Adjust pins not present in DIP or TO-100 layouts. PCB redesign is required when migrating to or from INA101KUE4.
INA101KUE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 300 kHz
- Current - Input Bias:
- 15 nA
- Voltage - Input Offset:
- 125 µV
- Current - Supply:
- 6.7mA
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 40 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
INA101KUE4 FAQ
1.How can I place an order for INA101KUE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA101KUE4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for INA101KUE4 reliable?
The price and inventory of INA101KUE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA101KUE4 is usually 5 days.
3.What payment methods are accepted for INA101KUE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA101KUE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA101KUE4?
INA101KUE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA101KUE4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for INA101KUE4?
For technical support, including INA101KUE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA101KUE4 requirements.
6.How does Aetrix verify that INA101KUE4 is sourced from the original manufacturer or authorized distributors?
All INA101KUE4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that INA101KUE4 meets industry standards.
7.What is the process for return or replacement of INA101KUE4?
All INA101KUE4 units undergo pre-shipment inspection (PSI). If there is an issue with INA101KUE4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The INA101KUE4 part is unused and in its original packaging.
Return procedure for INA101KUE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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