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Texas Instruments INA106U/2K5
- Part No.:
- INA106U/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA106U/2K5.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,328
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Product details
Overview
INA106U/2K5 from Texas Instruments is a monolithic precision differential amplifier with fixed gain = 10, built using laser-trimmed on-chip metal film resistors and a high-accuracy bipolar op amp. It delivers 86dB minimum CMRR, 0.025% maximum gain error, and 0.5MHz bandwidth for high-fidelity signal conditioning in battery test systems and industrial sensor interfaces.
For engineers reviewing the INA106U/2K5 datasheet, INA106U/2K5 pinout, INA106U/2K5 application, or INA106U/2K5 equivalent, key selection criteria include guaranteed CMRR over temperature, low 200μV max offset voltage, ±5V to ±18V dual-supply operation, and SOIC-8 packaging compatibility with automated assembly.
Technical Context
The INA106U/2K5 integrates four precisely matched thin-film resistors (10kΩ/100kΩ) with a high-performance op amp to implement a fully trimmed difference amplifier topology. Its internal resistor TCR tracking ensures stable gain accuracy and CMRR across –40°C to +85°C ambient.
It operates in a single functional mode with fixed G = 10 configuration; no external gain-setting components are required. Input common-mode range extends to ±11V at ±15V supplies, and output swing reaches ±12V into 10kΩ load, supporting wide dynamic range measurement applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 10 V/V - eliminates external resistor matching errors and simplifies layout |
| CMRR | 86 dB min - enables accurate differential measurements in noisy industrial environments |
| Gain Error | ±0.025% max - supports sub-0.1% system-level accuracy without calibration |
| Offset Voltage | 200 μV max - reduces zero-point drift in precision current/voltage sensing |
| Bandwidth | 0.5 MHz typical - sufficient for DC–500 kHz sensor signal conditioning |
| Supply Range | ±5 V to ±18 V - compatible with standard industrial dual-rail power domains |
| Input Impedance | 10 kΩ differential, 110 kΩ common-mode - minimizes loading on high-impedance sources |
Pinout & Package
The INA106U/2K5 is supplied in an 8-pin SOIC package (4.9 mm × 6.0 mm), optimized for surface-mount reflow assembly and board space efficiency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 3) | Noninverting input | 10kΩ internal resistor to op amp noninverting terminal; connects to positive side of differential source |
| –IN (Pin 2) | Inverting input | 10kΩ internal resistor to op amp inverting terminal; connects to negative side of differential source |
| OUT (Pin 6) | Amplified output | Delivers G × (V+IN – V–IN) + VREF; drives 10kΩ load with ±12V swing |
| REF (Pin 1) | Reference input | 100kΩ internal resistor to noninverting terminal; used for offset adjustment or level shifting |
| SENSE (Pin 5) | Sense input | 100kΩ internal resistor to inverting terminal; enables precise reference summing or feedback control |
| V+ (Pin 7) | Positive supply | Accepts up to +18V; requires local 1µF ceramic bypass capacitor |
| V– (Pin 4) | Negative supply | Accepts down to –18V; requires local 1µF ceramic bypass capacitor |
| NC (Pin 8) | No connection | Internally unconnected; may be left floating or tied to ground for mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed resistor network | Enables 86dB CMRR and 0.025% gain error without external trimming or calibration |
| Matched TCR resistors | Maintains CMRR and gain accuracy over temperature via <2 ppm/°C tracking |
| Low 0.2 µV/°C offset drift | Minimizes thermal-induced baseline shift in long-duration battery formation cycles |
| 0.001% max nonlinearity | Preserves waveform fidelity in servo position feedback and string inverter monitoring |
| Integrated protection clamps | Allows safe operation with input voltages up to ±25V (10V beyond rails) when IIN ≤ 1mA |
Applications
| Battery Cell Formation & Test Equipment | Sensor Tag & Data Logger |
|---|---|
Use Scenario: High-precision voltage and current monitoring during multi-stage lithium-ion cell charging/discharging cycles. IC Role / Device Role / Timing Role: Differential amplifier capturing mV-level sense resistor voltage drops with minimal common-mode interference from switching noise. Use Value: 86dB CMRR rejects power supply ripple and EMI, while 200μV max offset ensures <1mV absolute measurement error at full scale. | Use Scenario: Low-power analog front-end for environmental sensors (temperature, pressure, humidity) in wireless edge nodes. IC Role / Device Role / Timing Role: Signal conditioner converting sensor bridge outputs to ADC-ready differential signals with fixed gain and rail-to-rail compatibility. Use Value: ±5V to ±18V supply flexibility supports diverse battery chemistries; 0.5MHz bandwidth accommodates fast transient detection. |
| Servo Drive Position Feedback | Level Transmitter |
Use Scenario: Closed-loop motor control using resolver or encoder analog outputs requiring noise-immune amplification before digitization. IC Role / Device Role / Timing Role: Precision difference amplifier isolating position error signals from high-current power stage noise. Use Value: 0.001% nonlinearity prevents harmonic distortion in position tracking; low 4ppm/°C gain drift maintains loop stability across operating temperature. | Use Scenario: Industrial tank level measurement using 4–20mA current loops or differential pressure transducers. IC Role / Device Role / Timing Role: Signal interface between field transducer and PLC analog input module, rejecting ground loop interference. Use Value: REF and SENSE pins enable programmable zero-adjust and gain scaling; 110kΩ common-mode input impedance minimizes loading on passive bridges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA105U | Gain = 1 (unity-gain difference amplifier); lower CMRR (80dB min); same SOIC-8 package | Used where signal conditioning requires no gain scaling but higher input impedance (200kΩ CM) | Select when system gain is applied elsewhere and common-mode rejection >80dB suffices |
| INA118U | Instrumentation amplifier (INA) with gain set by external resistor; 110dB min CMRR; 1.2MHz BW | Requires external gain resistor and offers programmable gain (1–1000), better noise performance, and higher precision | Choose for variable gain, superior CMRR, or lower noise; not pin-compatible with INA106U/2K5 |
Compared with INA105U, the INA106U/2K5 provides 6dB higher CMRR and fixed G=10 scaling ideal for standardized sensor interfaces; versus INA118U, it trades programmability and noise for lower cost, simpler layout, and guaranteed gain accuracy without external component tolerance effects.
Availability
INA106U/2K5 is available at Aetrix Electronics and suitable for battery formation systems, industrial data loggers, servo drive feedback circuits, and process level transmitters requiring stable component supply and long-term production continuity.
Supply support for INA106U/2K5 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, embedded processing, and digital signal technologies for industrial, automotive, and communications markets.
The INA106U/2K5 belongs to TI's precision instrumentation amplifier family, designed specifically for high-accuracy, low-drift differential signal conditioning in harsh electrical environments with minimal external components.
FAQ
What is the maximum supply voltage rating for the INA106U/2K5?
The INA106U/2K5 has an absolute maximum supply voltage of ±18V (36V total), with recommended operation from ±5V to ±18V. Exceeding ±18V risks permanent damage. At ±15V nominal supply, the device delivers full specified performance including 0.5MHz bandwidth and 86dB CMRR. The INA106U/2K5 datasheet specifies derated performance outside the ±5V to ±18V range.
Does the INA106U/2K5 require external resistors to set gain?
No, the INA106U/2K5 does not require external resistors to set gain. It integrates four laser-trimmed thin-film resistors (10kΩ and 100kΩ pairs) to achieve a precise, factory-set gain of exactly 10 V/V. This eliminates external component tolerance errors, layout sensitivity, and thermal drift mismatches-key advantages over discrete op-amp + resistor solutions. The INA106U/2K5 is optimized for plug-and-play differential amplification.
Can the INA106U/2K5 operate from a single supply?
Yes, the INA106U/2K5 supports single-supply operation with V– grounded and V+ ranging from 10V to 36V. Input common-mode range extends to 0V to VS – 3V, and output swings from ~1.5V to VS – 1.5V into 10kΩ. For optimal CMRR and linearity, ensure balanced source impedances on +IN and –IN, and bias the REF pin appropriately. The INA106U/2K5 maintains its 0.025% gain error and 86dB CMRR under validated single-supply conditions.
What is the purpose of the SENSE pin on the INA106U/2K5?
The SENSE pin (Pin 5) on the INA106U/2K5 connects internally to a 100kΩ resistor at the inverting input node, enabling precise summing of external reference or feedback signals into the differential path. It allows offset trimming, level shifting, or closed-loop gain stabilization without degrading CMRR-provided the source impedance driving SENSE remains below 10Ω. This feature distinguishes the INA106U/2K5 from basic difference amplifiers and supports advanced configurations like precision summing or buffered reference injection.
How does the INA106U/2K5 handle input overvoltage conditions?
The INA106U/2K5 incorporates internal protection diodes and clamp structures that allow input voltages up to ±25V (10V beyond either supply rail), provided input current is limited to ≤1mA. This robustness protects against transient surges in industrial sensor interfaces and battery test equipment. However, sustained overvoltage beyond absolute maximum ratings (±18V supply, ±25V inputs) may cause irreversible damage. The INA106U/2K5 datasheet specifies these limits in Section 5.1 and recommends series current-limiting resistors for field-deployed applications.
INA106U/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 3V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1 MHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 50 µV
- Current - Supply:
- 1.5mA
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
INA106U/2K5 FAQ
1.How can I place an order for INA106U/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA106U/2K5 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 INA106U/2K5 reliable?
The price and inventory of INA106U/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA106U/2K5 is usually 5 days.
3.What payment methods are accepted for INA106U/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA106U/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA106U/2K5?
INA106U/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA106U/2K5 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 INA106U/2K5?
For technical support, including INA106U/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA106U/2K5 requirements.
6.How does Aetrix verify that INA106U/2K5 is sourced from the original manufacturer or authorized distributors?
All INA106U/2K5 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 INA106U/2K5 meets industry standards.
7.What is the process for return or replacement of INA106U/2K5?
All INA106U/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with INA106U/2K5, 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 INA106U/2K5 part is unused and in its original packaging.
Return procedure for INA106U/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA106U/2K5 Tags
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