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Texas Instruments INA110KUG4
- Part No.:
- INA110KUG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
INA110KUG4.pdf
- Description:
- IC INST AMP 1 CIRCUIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,558
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Product details
Overview
INA110KUG4 from Texas Instruments is a fast-settling FET-input instrumentation amplifier optimized for multiplexed data acquisition and high-speed differential pulse amplification. It delivers 4 µs settling to 0.01% at G = 1, 106 dB minimum CMR at DC, ±15 V supply operation, and internal gains of 1/10/100/200/500 V/V. Its 50 pA max input bias current and 10¹² Ω || 6 pF differential input impedance enable accurate amplification of high-impedance sources such as photodetectors and thermocouples.
For engineers reviewing the INA110KUG4 datasheet, INA110KUG4 pinout, INA110KUG4 application, or INA110KUG4 equivalent, key selection criteria include settling time at target gain, input bias current impact on source impedance errors, CMR degradation with frequency and source imbalance, and compatibility of SOIC-16 footprint with layout constraints for high-frequency stability.
Technical Context
The INA110KUG4 employs a current-feedback topology with laser-trimmed thin-film resistors in a three-op-amp configuration: dual FET-input buffers (A1/A2) provide ultra-low bias current and high CMR, while the output stage (A3) uses a precision-matched 10 kΩ resistor network in a unity-gain difference amplifier configuration. This architecture enables both fast settling and stable high-gain operation.
Gain is set either by internal resistor networks (via pin-strapping) or externally via RG between Pin 3 and Pins 11/12/16, supporting programmable gains up to 800 V/V. Input offset and output offset are independently adjustable using external potentiometers, with documented drift penalties (0.33 µV/°C per 100 µV adjusted input offset).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Settling Time (0.01%) | 4 µs at G = 1 (20 V step); enables ≤250 kSPS multiplexed DAQ with full accuracy |
| Input Bias Current | 20–100 pA max; introduces <1 µV error across 10 MΩ source impedance |
| CMR (DC) | 106 dB min at G = 100; rejects common-mode noise from industrial sensors |
| Small-Signal Bandwidth | 470 kHz at G = 100; supports AC-coupled sensor signals up to ~100 kHz |
| Input Impedance | 5 × 10¹² Ω || 6 pF differential; preserves signal integrity with RC filters & ESD protection |
| Supply Voltage Range | ±6 V to ±18 V; compatible with standard ±15 V industrial rails and ±12 V embedded systems |
| Gain Accuracy | ±0.02% typ at G = 10; reduces calibration burden in precision measurement systems |
Pinout & Package
The INA110KUG4 is housed in a 16-pin SOIC package (DW drawing), 7.5 mm × 10.3 mm body, 1.27 mm pitch, 2.65 mm max height, RoHS-compliant with NIPDAU-DCC finish and JEDEC MS-013 registration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–In) | Inverting Input | High-impedance FET node; requires matched source impedance for optimal CMR |
| 2 (+In) | Noninverting Input | High-impedance FET node; forms differential pair with Pin 1 |
| 3 (RG) | External Gain Set | Connect to Pins 11/12/16 to select internal gain; open for G = 1 |
| 4,5 (Input Offset Adj.) | Input Stage Nulling | Adjusts A1/A2 offset; adds ~0.33 µV/°C drift per 100 µV trimmed |
| 6 (Ref) | Reference Input | DC level shift point; series resistance degrades CMR - keep <10 Ω |
| 7 (Sense) | Output Sense Feedback | Enables Kelvin sensing at load to eliminate IR drop errors |
| 8 (–VCC) | Negative Supply Rail | Must be decoupled with 1 µF tantalum near pin; critical for stability |
| 9 (Output) | Differential Output | Capable of ±12.7 V swing into 2 kΩ; stable with ≤5000 pF capacitive load |
| 10 (+VCC) | Positive Supply Rail | Must be decoupled with 1 µF tantalum near pin; shared with Pin 8 |
| 11 (X500) | Internal Gain Select | Strap to Pin 3 for G = 500; laser-trimmed 201 Ω resistor path |
| 12 (X100) | Internal Gain Select | Strap to Pin 3 for G = 100; laser-trimmed 404 Ω resistor path |
| 13 (X10) | Internal Gain Select | Strap to Pin 3 for G = 10; laser-trimmed 80.2 Ω resistor path |
| 14 (X200) | Internal Gain Select | Strap to Pin 3 for G = 200; laser-trimmed 20kΩ/10kΩ divider |
| 15,16 (Output Offset Adj.) | Output Stage Nulling | Adjusts A3 offset; no added drift penalty; used for low-gain calibration |
Key Features
| Feature | Design Value |
|---|---|
| FET-input architecture | Enables direct interfacing with megohm-level sensor impedances without DC error accumulation |
| Output sense terminal (Pin 7) | Supports remote-sense load regulation, eliminating voltage drop errors in long traces or high-current loads |
| Laser-trimmed thin-film resistors | Delivers 0.02% gain error at G = 10 and 10 ppm/°C gain drift - critical for uncalibrated industrial sensors |
| Independent input/output offset adjustment | Allows staged calibration: input trim for high gain, output trim for low gain, minimizing thermal drift impact |
| Current-feedback topology | Provides flat frequency response up to 470 kHz at G = 100 and eliminates gain peaking instability at G = 1 |
Applications
| Multiplexed Data Acquisition Channel | High-Impedance Sensor Amplifier |
|---|---|
Use Scenario: Rapid-scanning 16-channel thermocouple system with 5 µs per channel settling requirement and shared ADC. IC Role / Device Role / Timing Role: Precision front-end gain block that settles within 5 µs to 0.01% after channel switch, enabling 200 kSPS aggregate throughput. Use Value: Eliminates need for per-channel auto-zero circuitry due to 4 µs G = 1 settling and <2 µV/°C offset drift. | Use Scenario: Photodiode transimpedance amplifier with 10 MΩ feedback and 10 nF anti-alias filter. IC Role / Device Role / Timing Role: High-Z buffer and gain stage placed after RC filter to preserve DC accuracy while rejecting common-mode noise. Use Value: 50 pA max bias current prevents >0.5 mV error across 10 MΩ; 10¹² Ω input impedance avoids filter pole shift. |
| Fast Differential Pulse Amplifier | High-Speed Gain Block in Signal Chain |
Use Scenario: Ultrasound receive path amplifying 5 MHz bursts from piezoelectric transducers with 10 ns rise time. IC Role / Device Role / Timing Role: First-stage differential amplifier providing 100× gain and driving 50 Ω coaxial cable to next stage. Use Value: 470 kHz small-signal bandwidth at G = 100 supports full pulse fidelity; 106 dB CMR suppresses switching noise from transmit burst. | Use Scenario: Programmable-gain stage in automated test equipment where gain must change dynamically between 10 and 500 V/V. IC Role / Device Role / Timing Role: Digitally controlled gain block using relay-switched pin straps (Pins 3+11/12/13/14) for sub-µs reconfiguration. Use Value: Internal laser-trimmed resistors ensure ≤0.1% gain error at G = 200 without external calibration; 7.5 µs 0.01% settling at G = 100 meets ATE timing budgets. |
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 power (1.3 mA vs 4.5 mA), slower settling (15 µs to 0.01% at G = 100), no output sense pin | Better suited for battery-powered portable instruments; lacks Kelvin sensing for precision load regulation | Select AD620ARZ when power budget is constrained and output sense is unnecessary |
| INA128UA | Higher gain drift (25 ppm/°C vs 10 ppm/°C), no internal gain strapping, fixed G = 1000 only via RG | Requires external RG for all gains; better for fixed-gain, ultra-low-noise applications (1 nV/√Hz) | Select INA128UA when lowest possible voltage noise is required and gain is fixed at ≥1000 |
Compared with AD620ARZ and INA128UA, the INA110KUG4 uniquely combines fast settling, internal gain selection, output sense capability, and ultra-low bias current - making it optimal for multiplexed DAQ and high-impedance sensor interfaces where speed, flexibility, and precision are jointly critical.
Availability
INA110KUG4 is available at Aetrix Electronics and suitable for industrial data acquisition systems, medical sensor front-ends, and test equipment requiring stable component supply with guaranteed long-term availability.
Supply support for INA110KUG4 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 is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of heritage in precision amplifiers and data conversion.
The INA110 product line was engineered specifically for high-speed, high-accuracy instrumentation applications - emphasizing fast settling, low input bias current, and robust common-mode rejection in demanding industrial and scientific measurement environments.
FAQ
What is the maximum recommended capacitive load for stable operation of the INA110KUG4?
The INA110KUG4 is specified stable with up to 5000 pF capacitive load at the output. Exceeding this value may cause ringing or oscillation, especially at higher gains. For loads >500 pF, TI recommends adding a small series resistor (10–50 Ω) between the output (Pin 9) and the capacitive load to isolate the amplifier's output stage and maintain phase margin. This technique is validated in the datasheet's "Dynamic Performance" section and preserves settling time integrity.
Can the INA110KUG4 operate with a single supply voltage?
No, the INA110KUG4 is designed exclusively for dual-supply operation (±VCC). Its internal architecture requires symmetrical positive and negative rails, with absolute maximum ratings specifying ±18 V and minimum operating range starting at ±6 V. Attempting single-supply operation will result in output saturation, loss of common-mode range, and potential damage if input voltages exceed the rail limits. For single-supply applications, consider TI's INA333 or similar rail-to-rail instrumentation amplifiers.
How does the output sense pin (Pin 7) improve accuracy in the INA110KUG4?
The output sense pin (Pin 7) provides a dedicated Kelvin feedback path that connects directly to the load terminals, bypassing PCB trace resistance between the amplifier output (Pin 9) and the load. This eliminates voltage drop errors caused by load current flowing through trace impedance - critical for applications requiring ±0.1% gain accuracy at currents >10 mA. The internal feedback loop adjusts the output drive to maintain precise voltage at the sense point, effectively compensating for IR losses.
What is the purpose of the two separate offset adjustment terminals in the INA110KUG4?
The INA110KUG4 provides independent input offset (Pins 4–5) and output offset (Pins 15–16) adjustment to optimize calibration across gain ranges. Input offset adjustment corrects errors in the first-stage amplifiers (A1/A2) and is preferred for gains ≥100, while output offset adjustment targets the final difference amplifier (A3) and is more effective at low gains (G ≤ 10). This separation minimizes thermal drift impact: adjusting input offset adds ~0.33 µV/°C drift, whereas output offset adjustment introduces negligible additional drift.
Does the INA110KUG4 support gains other than 1, 10, 100, 200, and 500 V/V?
Yes, the INA110KUG4 supports custom gains using an external resistor RG connected between Pin 3 (RG) and Pins 11/12/16. The gain equation is G = 1 + [40 kΩ / (RG + 50 Ω)], allowing continuous gain tuning from ~1.5 to 800 V/V. However, accuracy and drift degrade with external RG due to its ±20% tolerance and 20 ppm/°C drift, versus the laser-trimmed internal resistors. For best performance, TI recommends using internal strapping for the five standard gains and reserving RG only when nonstandard values are essential.
INA110KUG4 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:
- 17V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 2.5 MHz
- Current - Input Bias:
- 20 pA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 3mA
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 12 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
INA110KUG4 FAQ
1.How can I place an order for INA110KUG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA110KUG4 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 INA110KUG4 reliable?
The price and inventory of INA110KUG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA110KUG4 is usually 5 days.
3.What payment methods are accepted for INA110KUG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA110KUG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA110KUG4?
INA110KUG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA110KUG4 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 INA110KUG4?
For technical support, including INA110KUG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA110KUG4 requirements.
6.How does Aetrix verify that INA110KUG4 is sourced from the original manufacturer or authorized distributors?
All INA110KUG4 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 INA110KUG4 meets industry standards.
7.What is the process for return or replacement of INA110KUG4?
All INA110KUG4 units undergo pre-shipment inspection (PSI). If there is an issue with INA110KUG4, 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 INA110KUG4 part is unused and in its original packaging.
Return procedure for INA110KUG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA110KUG4 Tags
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