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Texas Instruments INA2132U/2K5
- Part No.:
- INA2132U/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA2132U/2K5.pdf
- Description:
- IC INST AMP 2 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,217
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Product details
Overview
INA2132U/2K5 from Texas Instruments (formerly Burr-Brown) is a dual, low-power, single-supply difference amplifier in SO-14 package, delivering ±0.05% max gain error, 90dB CMRR, and 160µA per amplifier quiescent current. It operates from +2.7V to +36V single supply or ±1.35V to ±18V dual supply, and is specified for –40°C to +85°C industrial temperature range - ideal for precision differential sensing in battery-powered instrumentation.
For engineers reviewing the INA2132U/2K5 datasheet, INA2132U/2K5 pinout, INA2132U/2K5 application, or INA2132U/2K5 equivalent, key selection criteria include guaranteed unity-gain accuracy over temperature, rail-to-rail input common-mode range extending beyond supply rails, low-noise performance (1.6µVp-p, 0.1–10Hz), and verified channel isolation for dual-channel signal conditioning.
Technical Context
The INA2132U/2K5 integrates two independent precision op amps with laser-trimmed 40kΩ resistor networks to achieve accurate unity-gain difference amplification without external precision resistors. Its internal architecture maintains high common-mode rejection via matched TCR resistor tracking across temperature.
Each channel supports reference pin biasing (pins 14/8), enabling output level-shifting and offset nulling; input common-mode range extends to 2×(V–) and nearly 2×(V+) – 1V, allowing measurement of differential signals exceeding supply rails while avoiding phase reversal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Accuracy | ±0.05% max initial error - ensures precise differential voltage reproduction without calibration in production systems. |
| CMRR | 90dB min at DC–10kHz - rejects noise and interference in high-noise industrial or motor-control environments. |
| Quiescent Current | 160µA per amplifier - enables multi-channel, always-on sensing in energy-constrained portable or remote devices. |
| Input Voltage Range | –2.5V to +5.5V on +5V supply - supports differential inputs beyond rails (e.g., shunt monitoring with ground-referenced load). |
| Small-Signal Bandwidth | 300kHz - sufficient for DC–10kHz sensor signal conditioning including strain gauges and current shunts. |
| Offset Voltage Drift | ±1µV/°C max - maintains accuracy over full –40°C to +85°C operating range without thermal recalibration. |
| Output Drive | Stable with 10nF capacitive load - simplifies anti-aliasing filter design without external compensation. |
Pinout & Package
INA2132U/2K5 is housed in a 14-pin SOIC (SO-14, package drawing D), RoHS-compliant, moisture sensitivity level 3 (260°C peak reflow), with 2500 units per tape-and-reel reel (/2K5).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 11 | No Connection | Unused pins; must remain unconnected to avoid parasitic coupling or latch-up risk. |
| 2 (+In A), 6 (+In B) | Noninverting Input | Differential input terminals for Channel A and B; require matched source impedance for optimal CMRR. |
| 3 (–In A), 5 (–In B) | Inverting Input | Paired with respective +In pins; interchanging with Sense pins degrades gain accuracy and CMRR. |
| 4 (V–), 11 (V+) | Power Supply | Accepts single supply (+2.7V to +36V) or dual supply (±1.35V to ±18V); bypass caps required near pins. |
| 8 (Ref B), 14 (Ref A) | Output Reference | DC bias point for output stage; grounding sets output zero-reference; applying voltage offsets output linearly. |
| 9 (Out B), 13 (Out A) | Amplifier Output | Unity-gain buffered differential outputs; drive capability up to ±12mA into 10kΩ loads. |
| 10 (Sense B), 12 (Sense A) | Internal Resistor Node | Access points to laser-trimmed 40kΩ network; not for external connection - interchanging degrades performance. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed resistor network | Enables ±0.05% gain error and 0.001% nonlinearity without external precision components. |
| Rail-to-rail input common-mode range | Supports differential measurements where inputs exceed V+ or fall below V– (e.g., high-side current sensing). |
| Independent dual channels | No shared bias circuitry - eliminates crosstalk (<0.04µV/V dc) for simultaneous isolated signal paths. |
| Reference pin flexibility | Allows output level-shifting, offset trimming, or differential-to-single-ended conversion without external op amps. |
| Low 1.6µVp-p 0.1–10Hz noise | Meets requirements for high-resolution DC-coupled applications like weigh scales and medical sensors. |
Applications
| High-Side Current Sensing | Precision Instrumentation Building Block |
|---|---|
Use Scenario: Monitoring motor phase current using a shunt resistor placed between power rail and load. IC Role / Device Role / Timing Role: Difference amplifier measuring mV-level differential voltage across shunt while rejecting high common-mode bus voltage (e.g., 24V or 48V). Use Value: Enables accurate real-time current feedback without galvanic isolation or expensive current transformers. | Use Scenario: Constructing a 3-op-amp instrumentation amplifier with user-defined gain and low drift. IC Role / Device Role / Timing Role: Provides matched, laser-trimmed G = 1 front-end stage; second stage adds gain via external resistors. Use Value: Reduces component count and board space vs discrete resistor networks while maintaining <0.01% gain matching. |
| Battery-Powered Sensor Interface | Ground Loop Eliminator |
Use Scenario: Signal conditioning for thermocouple or bridge sensor in portable data logger powered by Li-ion battery. IC Role / Device Role / Timing Role: Low-quiescent-current (160µA/channel) differential amplifier rejecting EMI and supply ripple in single-supply mode. Use Value: Extends battery life beyond 1 year in always-on monitoring while preserving µV-level resolution. | Use Scenario: Interfacing industrial PLC analog I/O modules with field transmitters located in electrically noisy environments. IC Role / Device Role / Timing Role: Isolates measurement circuit from ground potential differences between subsystems using differential signaling. Use Value: Eliminates 50/60Hz hum and transient-induced errors without optocouplers or isolation amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA132UA/2K5 | Single-channel version; identical specs except channel count and pinout; same SO-8 package. | Suitable when only one differential path is needed; saves board area but requires duplication for dual-channel needs. | Select INA132UA/2K5 for space-constrained single-sensor designs; INA2132U/2K5 is optimal for dual-path efficiency. |
| INA2143U/2K5 | Higher bandwidth (1.2MHz), lower offset drift (±0.2µV/°C), but higher IQ (350µA/channel); same SO-14 package. | Better for dynamic signals (e.g., audio, fast PWM sensing); less suitable for ultra-low-power battery operation. | Choose INA2143U/2K5 when bandwidth >300kHz or drift <1µV/°C is critical; retain INA2132U/2K5 for lowest power and cost. |
Compared with INA132UA/2K5 and INA2143U/2K5, the INA2132U/2K5 uniquely balances dual-channel integration, sub-200µA/channel quiescent current, and industrial-grade CMRR - making it the optimal choice for cost-sensitive, battery-aware, dual-sensor systems requiring stable DC accuracy.
Availability
INA2132U/2K5 is available at Aetrix Electronics and suitable for high-reliability current sensing, portable instrumentation, and industrial analog interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for INA2132U/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 (TI) is a global semiconductor leader specializing in analog and embedded processing technologies, with deep heritage in precision amplifiers dating to Burr-Brown acquisition in 2000.
The INA2132U/2K5 belongs to TI's precision difference amplifier product line, engineered for high-accuracy, low-power differential signal conditioning in cost-sensitive industrial and portable measurement systems.
FAQ
What is the maximum common-mode input voltage for INA2132U/2K5 when operated on a +5V single supply?
When powered by +5V single supply, the INA2132U/2K5 supports a common-mode input voltage range of –2.5V to +5.5V. This extended range allows the device to accurately measure differential signals that exceed the positive supply rail or go below ground - a key capability for high-side current sensing and ground-referenced shunt monitoring. The specification is validated per the datasheet's "SPECIFICATIONS: VS = +5V Single Supply" table.
Can INA2132U/2K5 be used as a unity-gain inverting amplifier, and how is it configured?
Yes, the INA2132U/2K5 can be configured as a precision unity-gain inverting amplifier by connecting the +In terminal to the input signal, the –In terminal to the output, and grounding the Ref pin. Figure 11 of the INA2132U/2K5 datasheet confirms this configuration yields VOUT = –VIN with ±0.05% gain accuracy and 90dB CMRR. No external resistors are needed due to the internal laser-trimmed network.
Does INA2132U/2K5 require external trimming for offset voltage in typical applications?
No, the INA2132U/2K5 does not require external offset trimming in most applications. It is laser-trimmed to deliver ±75µV initial offset (±150µV on +5V supply) and ±1µV/°C drift, meeting tight accuracy requirements out-of-the-box. Only high-precision systems demanding sub-10µV total offset over temperature may consider optional Ref-pin trimming per Figure 2 in the INA2132U/2K5 datasheet.
What is the capacitive load drive capability of INA2132U/2K5, and why does it matter for filter design?
The INA2132U/2K5 is stable driving up to 10nF capacitive loads, as confirmed in the Absolute Maximum Ratings and Typical Performance Curves. This capability simplifies anti-aliasing or EMI filtering: designers can place RC filters directly at the output without risking oscillation or settling degradation - eliminating need for output isolation resistors or buffer stages in many signal chain designs.
How does channel separation performance of INA2132U/2K5 impact dual-sensor applications?
The INA2132U/2K5 achieves <0.04µV/V (–88dB) dc channel separation due to fully independent bias circuitry and physical layout isolation. In dual-sensor applications - such as simultaneous voltage and current monitoring - this prevents signal leakage between channels, ensuring measurement integrity even when one channel handles high-slew transients (e.g., motor startup) while the other reads slow-varying temperature data.
INA2132U/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 0.1V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 300 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 75 µV
- Current - Supply:
- 160µA
- Current - Output / Channel:
- 12 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
INA2132U/2K5 FAQ
1.How can I place an order for INA2132U/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA2132U/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 INA2132U/2K5 reliable?
The price and inventory of INA2132U/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA2132U/2K5 is usually 5 days.
3.What payment methods are accepted for INA2132U/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA2132U/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA2132U/2K5?
INA2132U/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA2132U/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 INA2132U/2K5?
For technical support, including INA2132U/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA2132U/2K5 requirements.
6.How does Aetrix verify that INA2132U/2K5 is sourced from the original manufacturer or authorized distributors?
All INA2132U/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 INA2132U/2K5 meets industry standards.
7.What is the process for return or replacement of INA2132U/2K5?
All INA2132U/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with INA2132U/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 INA2132U/2K5 part is unused and in its original packaging.
Return procedure for INA2132U/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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