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Texas Instruments INA110KP
- Part No.:
- INA110KP
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
INA110KP.pdf
- Description:
- IC INST AMP 1 CIRCUIT 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:154
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Product details
Overview
INA110KP from Texas Instruments is a fast-settling FET-input instrumentation amplifier optimized for multiplexed-input data acquisition systems and high-speed differential pulse amplification. It delivers 4 µs settling to 0.01%, 106 dB minimum CMR at DC, internal gains of 1/10/100/200/500 V/V, and 50 pA maximum input bias current - enabling accurate amplification of high-impedance sources such as thermocouples and photodetectors.
For engineers reviewing the INA110KP datasheet, INA110KP pinout, INA110KP application, or INA110KP equivalent, key selection criteria include settling time at 0.01% accuracy, gain-dependent dynamic response (e.g., 100 kHz full-power bandwidth at G=500), input offset drift (±2 µV/°C), and compatibility with ±6 V to ±18 V dual supplies in industrial temperature range (–25°C to +85°C).
Technical Context
The INA110KP employs a current-feedback topology with laser-trimmed thin-film resistors and precision FET input buffers, delivering high common-mode rejection (106 dB min at DC) and low gain drift (10–50 ppm/°C). Its three-op-amp architecture separates input-stage gain control from output-stage difference amplification, allowing independent optimization of input impedance (>2 TΩ common-mode) and output stability.
Gain is set via internal resistor networks connected through pins 11/12/13/16, supporting discrete gains without external components; external RG (pin 3 to pins 11/12/16) enables programmable gain up to 800 V/V. Input protection tolerates differential and common-mode voltages up to ±VCC, and output sense (pin 8) supports remote load regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Settling Time (0.01%) | 4 µs at G=1 (20 V step); enables <5 µs channel switching in multiplexed DAQ systems |
| CMR (DC) | 106 dB min at G=100; ensures >99.999% rejection of 1 V common-mode interference |
| Input Bias Current | 50 pA max; permits use with >10 MΩ source impedances without significant DC error |
| Gain Options | 1, 10, 100, 200, 500 V/V via internal resistors; eliminates need for external gain-setting network |
| Supply Voltage Range | ±6 V to ±18 V; supports operation across industrial rail standards including ±12 V and ±15 V |
| Operating Temperature | –25°C to +85°C (P grade); qualified for commercial and industrial embedded environments |
| Input Offset Drift | 2 µV/°C; limits thermal-induced error to <150 µV over full temperature range |
Pinout & Package
The INA110KP is supplied in a 16-pin plastic DIP (PDIP-N) package with 0.3-inch body width and 0.1-inch lead pitch, compliant with JEDEC MS-001. Pin 1 is identified by a notch or dot; leads are tin-lead (NIPDAU) finish, RoHS-compliant, and rated for 300°C soldering (10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | Inverting / Non-inverting Input | Differential inputs with >2 TΩ common-mode impedance; tolerate ±VCC common-mode voltage |
| 3 | RG Terminal | Connection point for external gain-setting resistor to pins 11/12/16; sets gain per G = 1 + 40k/(RG + 50Ω) |
| 4, 5 | Input Offset Adjust | Two-terminal potentiometer interface for trimming input stage offset; adds ~0.33 µV/°C drift per 100 µV adjusted |
| 6 | Reference | Output level shift node; low-impedance connection required to preserve CMR |
| 7, 14 | Negative / Positive Supply | Accept ±6 V to ±18 V; require local 1 µF tantalum decoupling per supply pin |
| 8 | Sense | Output feedback point for remote sensing; compensates for IR drop in load connections |
| 9, 10 | Output Offset Adjust | Two-terminal interface for trimming output stage offset; no added drift penalty |
| 11–13, 15, 16 | Gain Select | Pins 11 (G=500), 12 (G=100), 13 (G=10), 16 (G=200); short to pin 3 for internal gain configuration |
| 15 | Output | Single-ended output capable of ±12.7 V swing into 2 kΩ; stable with ≤5000 pF capacitive load |
Key Features
| Feature | Design Value |
|---|---|
| FET-input architecture | Enables direct interfacing with megohm-level sensor sources (e.g., piezoelectric, photodiode) without DC bias error accumulation |
| Laser-trimmed thin-film resistors | Guarantees gain error ≤0.05% at G=10 and ≤0.5% at G=500, minimizing calibration burden in production test |
| Output sense terminal (pin 8) | Allows Kelvin connection to load, eliminating voltage drop errors in high-current or long-cable applications |
| Internal gain-select network | Provides five factory-verified gains without external components, reducing BOM count and layout sensitivity |
| ±VCC input protection | Permits safe operation with input signals exceeding supply rails - critical for transient-prone industrial sensor interfaces |
Applications
| Multiplexed Data Acquisition Channel | High-Impedance Sensor Interface |
|---|---|
Use Scenario: Rapid-scanning 16-channel thermocouple system with 100 kS/s aggregate sampling rate and <5 µs per-channel settling requirement. IC Role / Device Role / Timing Role: Precision front-end instrumentation amplifier providing gain, common-mode rejection, and fast settling before ADC sampling. Use Value: 4 µs 0.01% settling at G=100 enables full-scale channel switching within 5 µs, meeting 100 kS/s aggregate throughput without inter-channel crosstalk. | Use Scenario: Photodiode current-to-voltage conversion in optical spectrometer requiring <100 µV offset error and minimal input loading. IC Role / Device Role / Timing Role: High-Z transimpedance preamplifier stage with FET inputs preserving signal integrity from pA-level photocurrents. Use Value: 50 pA max input bias current ensures <50 µV error across 1 MΩ feedback resistor, maintaining sub-100 µV DC accuracy without active bias cancellation. |
| Fast Differential Pulse Amplifier | Programmable-Gain Signal Conditioning |
Use Scenario: Ultrasound receive path amplifying narrowband 2–10 MHz differential pulses from piezoelectric transducers. IC Role / Device Role / Timing Role: High-bandwidth, low-noise differential gain block with 100 kHz full-power bandwidth at G=500 and 10 nV/√Hz input noise. Use Value: 100 kHz full-power bandwidth preserves pulse fidelity at G=500; 10 nV/√Hz input noise maintains SNR >70 dB for µV-level echo signals. | Use Scenario: Industrial PLC analog input module supporting configurable 4–20 mA and ±10 V ranges via software-selectable gain. IC Role / Device Role / Timing Role: Digitally controlled instrumentation amplifier with relay-switched gain taps (G=10/100/500) and output sense for field wiring compensation. Use Value: Internal gain select pins enable robust, low-drift gain switching; output sense (pin 8) corrects for voltage drop across 100 m field cables. |
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 settling time (15 µs to 0.01% at G=100), higher bias current (1 nA), no output sense pin | Better low-frequency precision (0.3 µV/°C drift), but unsuitable for <10 µs multiplexed DAQ | Select AD620ARZ only when ultra-low offset drift dominates over speed and remote sensing needs |
| INA128HP | Slower settling (16 µs to 0.01%), lower CMR (110 dB at DC), single-supply capable (2.7–36 V) | Optimized for battery-powered portable instruments; lacks PDIP packaging and ±VCC input protection | Select INA128HP for low-power, single-rail designs where 16 µs settling is acceptable |
Compared with AD620ARZ and INA128HP, the INA110KP uniquely combines sub-5 µs settling, output sense capability, and ±VCC input tolerance - making it the only choice for high-speed industrial DAQ with long cable runs and rail-to-rail input transients.
Availability
INA110KP is available at Aetrix Electronics and suitable for multiplexed data acquisition systems, high-impedance sensor interfaces, fast differential pulse amplification, and programmable-gain signal conditioning requiring stable component supply across extended industrial temperature ranges.
Supply support for INA110KP 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 acquisition solutions.
The INA110KP belongs to TI's legacy instrumentation amplifier product line, engineered specifically for high-speed, high-accuracy signal conditioning in industrial and test equipment where settling time, input protection, and gain flexibility are critical.
FAQ
What is the maximum guaranteed settling time of the INA110KP at 0.01% accuracy?
The INA110KP guarantees 4 µs settling time to 0.01% for a 20 V output step at unity gain. At G=100, settling is 4 µs typical and 7.5 µs maximum; at G=500, it is 16 µs typical and 25 µs maximum. These values are measured under standard conditions (±15 V supply, 25°C, RL = 2 kΩ) and are fully specified in the Electrical Characteristics table of the INA110KP datasheet.
Does the INA110KP support external gain programming beyond the internal 1/10/100/200/500 V/V options?
Yes, the INA110KP supports external gain programming using an external resistor RG connected between pin 3 and pins 11, 12, and/or 16. The gain equation is G = 1 + 40 kΩ / (RG + 50 Ω), enabling gains up to 800 V/V. Gain accuracy depends on RG tolerance and the ±20% tolerance of internal resistors, with typical drift of 20 ppm/°C.
How does the output sense pin (pin 8) improve performance in the INA110KP?
The output sense pin (pin 8) in the INA110KP provides a dedicated feedback path that can be connected directly at the load terminals. This Kelvin connection eliminates errors caused by voltage drops across PCB traces or field wiring, ensuring the output voltage delivered to the load matches the amplifier's internal regulation - critical for precision applications with long cables or high load currents.
What is the operating temperature range for the INA110KP, and how does it compare to other grades in the INA110 family?
The INA110KP is rated for –25°C to +85°C (commercial/industrial grade). Other variants include the INA110AG (–55°C to +125°C, ceramic DIP) and INA110BG (–55°C to +125°C, ceramic DIP). All share identical electrical specifications; only packaging and temperature grading differ. The KP grade uses plastic DIP and is optimized for cost-sensitive industrial applications.
Can the INA110KP be used with single-supply operation?
No, the INA110KP requires dual ±VCC supplies and is not specified for single-supply operation. Its input common-mode range extends to ±VCC, and its output swing is symmetrical about ground. For single-supply applications, consider alternatives like the INA128HP or INA333, which support rail-to-rail input/output with 2.7 V minimum supply.
INA110KP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 100 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
INA110KP FAQ
1.How can I place an order for INA110KP through Aetrix?
Please submit a Request for Quotation (RFQ) for INA110KP 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 INA110KP reliable?
The price and inventory of INA110KP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA110KP is usually 5 days.
3.What payment methods are accepted for INA110KP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA110KP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA110KP?
INA110KP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA110KP 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 INA110KP?
For technical support, including INA110KP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA110KP requirements.
6.How does Aetrix verify that INA110KP is sourced from the original manufacturer or authorized distributors?
All INA110KP 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 INA110KP meets industry standards.
7.What is the process for return or replacement of INA110KP?
All INA110KP units undergo pre-shipment inspection (PSI). If there is an issue with INA110KP, 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 INA110KP part is unused and in its original packaging.
Return procedure for INA110KP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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