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Texas Instruments INA106UG4
- Part No.:
- INA106UG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA106UG4.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,919
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Product details
Overview
INA106UG4 from Texas Instruments is a monolithic precision differential amplifier with fixed gain = 10, built around a high-accuracy op amp and laser-trimmed on-chip metal film resistors. It delivers 86 dB minimum CMRR, 0.025% max gain error, and 200 µV max input offset voltage, enabling high-fidelity signal conditioning in battery test systems and industrial sensor interfaces.
For engineers reviewing the INA106UG4 datasheet, INA106UG4 pinout, INA106UG4 application, or INA106UG4 equivalent, this page provides verified technical context, package mapping to SOIC-8, real-world design meaning of key specs, and two validated alternative parts for precision differential amplification where gain stability and common-mode rejection are critical.
Technical Context
The INA106UG4 implements a fully integrated difference amplifier topology using four precisely matched on-die resistors (10kΩ/100kΩ ratio) laser-trimmed for gain accuracy and CMRR. Its internal architecture eliminates external resistor matching requirements while maintaining <4 ppm/°C gain drift and <0.2 µV/°C offset drift across –40°C to +85°C.
It operates from ±5 V to ±18 V dual supplies (or 10 V to 36 V single supply), supports rail-to-rail output swing under load, and features internal supply clamps. The device has no user-selectable modes - it functions exclusively as a fixed-gain differential amplifier with reference and sense inputs for flexible offset and common-mode control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 10 V/V - eliminates external resistor selection and matching errors in difference amplifier designs. |
| CMRR | 86 dB minimum - rejects >99.98% of common-mode noise in sensor bridges or motor current shunts. |
| Gain Error | ±0.025% maximum - ensures measurement accuracy within ±250 ppm without system calibration. |
| Input Offset Voltage | 200 µV maximum - contributes ≤2 mV output error at full-scale differential input, critical for low-level signal integrity. |
| Bandwidth | 0.5 MHz typical - supports accurate amplification of fast transients in servo position feedback or string inverter monitoring. |
| Supply Range | ±5 V to ±18 V dual supply - enables operation in legacy industrial rails and compatibility with ±12 V or ±15 V systems. |
| Package | SOIC-8 (D package) - surface-mount footprint compatible with automated assembly and thermal performance of 108.9 °C/W junction-to-ambient. |
Pinout & Package
INA106UG4 is supplied in an 8-pin SOIC (Small Outline Integrated Circuit) package, 4.9 mm × 6.0 mm body size, with gull-wing leads suitable for reflow soldering. Thermal resistance is 108.9 °C/W (junction-to-ambient) and 56.6 °C/W (junction-to-board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 3) | Noninverting input | Connected internally to 10 kΩ resistor; forms one leg of differential pair - requires matched source impedance for optimal CMRR. |
| –IN (Pin 2) | Inverting input | Connected internally to 10 kΩ resistor; second leg of differential pair - mismatch >5 Ω degrades CMRR to ~86 dB. |
| OUT (Pin 6) | Amplified output | Delivers G × (V+IN – V–IN) + VREF; drives loads up to ±70 mA (CSO: RFB) with 0.01 Ω output impedance. |
| REF (Pin 1) | Reference input | Summing node for offset adjustment or level-shifting; must be driven from <10 Ω source to preserve CMRR. |
| SENSE (Pin 5) | Sense input | Internally connected to 100 kΩ resistor; used with REF to configure offset trim or differential gain variants. |
| V+ (Pin 7) | Positive supply | Accepts up to +18 V; bypass capacitor required close to pin for noise immunity and stability with capacitive loads ≤1000 pF. |
| V– (Pin 4) | Negative supply | Accepts down to –18 V; paired with V+ to define operating range - quiescent current is ±1.5 to ±2 mA. |
| NC (Pin 8) | No connection | Unbonded terminal - must be left floating; no internal circuitry or thermal path associated with this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed resistor network | On-chip 10kΩ/100kΩ metal film resistors trimmed for 0.025% gain error and <2 ppm/°C TCR tracking - eliminates discrete resistor matching cost and drift. |
| High CMRR over temperature | 86 dB minimum from –40°C to +125°C - enabled by matched resistor TCR and monolithic layout, critical for stable measurements in uncontrolled environments. |
| Low input offset drift | 0.2 µV/°C typical - reduces thermal-induced baseline shift in long-duration battery formation tests or data loggers. |
| 0.5 MHz bandwidth at G = 10 | Supports accurate amplification of step responses with ≤10 µs settling time (0.01%) - meets timing requirements in servo drive feedback loops. |
| Internal supply clamps | Protects against overvoltage transients on supply pins - allows safe operation in industrial power rails with switching noise or brownout conditions. |
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 shunt voltage with 10× gain and rejecting common-mode bus noise. Use Value: 200 µV max offset and 0.025% gain error ensure sub-millivolt measurement fidelity over temperature, reducing calibration frequency and improving cycle-life modeling accuracy. |
Use Scenario: Low-power analog front-end for environmental sensors (temperature, pressure, humidity) in remote wireless nodes. IC Role / Device Role / Timing Role: Signal conditioner converting bridge outputs to clean, amplified differential signals before ADC sampling. Use Value: 86 dB CMRR suppresses EMI from RF modules or switching regulators, while 0.5 MHz bandwidth accommodates burst-mode sampling without aliasing. |
| Servo Drive Position Feedback | String Inverter Current Monitoring |
Use Scenario: Closed-loop position control in industrial servomotors using resolver or encoder analog outputs. IC Role / Device Role / Timing Role: Precision difference amplifier isolating low-amplitude sine/cosine signals from high-noise motor power stages. Use Value: 10 µs 0.01% settling time enables real-time position correction at kHz update rates; low nonlinearity (0.001%) preserves angular resolution. |
Use Scenario: DC-link current sensing in photovoltaic string inverters with high common-mode voltage (up to ±1000 V). IC Role / Device Role / Timing Role: Isolated differential amplifier stage (with external isolation) measuring shunt voltage in high-voltage DC strings. Use Value: Laser-trimmed resistors maintain gain accuracy despite thermal cycling; 0.2 µV/°C offset drift minimizes zero-point drift across daily solar thermal swings. |
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); 100 dB min CMRR; 50 µV max offset; SOIC-8 package. | Used where signal conditioning requires no gain scaling but ultra-high CMRR is mandatory (e.g., medical ECG front-ends). | Select when system gain is applied elsewhere and superior common-mode rejection outweighs need for on-chip amplification. |
| INA117P | Gain = 1; 120 dB min CMRR; 100 µV max offset; PDIP-8 only; higher supply current (±3.5 mA). | Preferred in legacy through-hole designs requiring highest possible CMRR in low-frequency (<10 kHz) instrumentation. | Choose for through-hole prototyping or where 120 dB CMRR justifies larger package and higher power consumption. |
Compared with INA106UG4, INA105U offers higher CMRR but no gain, making it suitable for post-amplification differential sensing, while INA117P delivers superior CMRR in PDIP but lacks SOIC packaging and fixed gain - both require redesign of gain staging and layout, with no pin-to-pin compatibility.
Availability
INA106UG4 is available at Aetrix Electronics and suitable for battery formation equipment, industrial sensor tags, servo drive feedback systems, and photovoltaic string inverters requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for INA106UG4 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, with decades of heritage in precision amplifier design and manufacturing.
The INA106UG4 belongs to TI's precision instrumentation amplifier family, engineered specifically for high-accuracy differential signal acquisition in industrial test, energy, and automation systems where resistor matching, thermal drift, and noise performance directly impact measurement validity.
FAQ
What is the operating temperature range for the INA106UG4?
The INA106UG4 is specified for operation from –40°C to +85°C ambient temperature. Its laser-trimmed resistor network maintains gain accuracy and CMRR across this range, with gain drift limited to ±4 ppm/°C and offset drift at 0.2 µV/°C typical. This makes the INA106UG4 suitable for deployment in industrial enclosures, outdoor battery test racks, and unheated data logger housings without derating.
Does the INA106UG4 require external resistors to set gain?
No, the INA106UG4 does not require external resistors to set gain. It integrates four laser-trimmed on-chip metal film resistors configured for fixed gain = 10. This eliminates external resistor matching errors, board space, and thermal tracking issues - all gain-setting components are monolithically fabricated and trimmed during wafer test, ensuring consistent performance across units and temperature.
Can the INA106UG4 be used with a single supply?
Yes, the INA106UG4 supports single-supply operation from 10 V to 36 V. When operated single-ended, the REF pin must be biased to a stable mid-rail voltage (e.g., VS/2) to establish proper common-mode output range. Input common-mode voltage is limited to –11 V to +11 V relative to V–, so level-shifting networks may be needed for signals outside that window - refer to Figure 7-1 in the SBOS152C datasheet for biasing guidance.
What is the purpose of the SENSE pin on the INA106UG4?
The SENSE pin (Pin 5) connects internally to a 100 kΩ resistor tied to the inverting op-amp input. It enables advanced configurations such as offset trimming (used with REF), gain adjustment via external feedback, or conversion to inverting amplifier topologies. In standard difference amplifier use, SENSE is typically connected to the same potential as REF or grounded - its function depends on external circuitry, not internal logic.
How does the INA106UG4 compare to discrete op-amp + resistor solutions?
The INA106UG4 replaces discrete op-amp + four-precision-resistor designs with a monolithic solution offering guaranteed 0.025% gain error, 86 dB CMRR, and <4 ppm/°C gain drift - specifications difficult to achieve consistently with off-the-shelf resistors due to absolute tolerance, ratio match, and TCR tracking limitations. Its integrated layout also reduces parasitic capacitance and layout sensitivity, improving high-frequency CMRR and reducing design iteration time.
INA106UG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
INA106UG4 FAQ
1.How can I place an order for INA106UG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA106UG4 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 INA106UG4 reliable?
The price and inventory of INA106UG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA106UG4 is usually 5 days.
3.What payment methods are accepted for INA106UG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA106UG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA106UG4?
INA106UG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA106UG4 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 INA106UG4?
For technical support, including INA106UG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA106UG4 requirements.
6.How does Aetrix verify that INA106UG4 is sourced from the original manufacturer or authorized distributors?
All INA106UG4 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 INA106UG4 meets industry standards.
7.What is the process for return or replacement of INA106UG4?
All INA106UG4 units undergo pre-shipment inspection (PSI). If there is an issue with INA106UG4, 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 INA106UG4 part is unused and in its original packaging.
Return procedure for INA106UG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA106UG4 Tags
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LM358DR
Texas Instruments
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MCP6006UT-E/OT
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LM358P
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