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Texas Instruments INA2132UA/2K5E4
- Part No.:
- INA2132UA/2K5E4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA2132UA/2K5E4.pdf
- Description:
- IC INST AMP 1 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,232
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Product details
Overview
INA2132UA/2K5E4 from Texas Instruments (formerly Burr-Brown) is a dual, low-power, unity-gain difference amplifier in SO-14 package, delivering ±0.05% max gain error, 90dB CMRR, and 160µA per amplifier quiescent current. It operates from single supply (2.7V to 36V) or dual supplies (±1.35V to ±18V), with input common-mode range extending beyond rails - ideal for precision current sensing and ground-loop elimination in battery-powered instrumentation.
For engineers reviewing the INA2132UA/2K5E4 datasheet, INA2132UA/2K5E4 pinout, INA2132UA/2K5E4 application, or INA2132UA/2K5E4 equivalent, key selection criteria include guaranteed rail-to-rail input common-mode operation down to V–, laser-trimmed resistor network accuracy, channel isolation >120dB at 1kHz, and stable 10nF capacitive load drive capability without external compensation.
Technical Context
The INA2132UA/2K5E4 integrates two independent precision op amps with matched 40kΩ laser-trimmed thin-film resistor networks, enabling accurate G = 1 differential amplification without external gain-setting components. Its internal architecture maintains high CMRR by ensuring <1ppm/°C TCR tracking between resistors across –40°C to +85°C.
Each channel features rail-to-rail output swing (within 0.15V of V– and 0.8V of V+ at 10kΩ load), input voltage range up to ±80V, and no phase reversal under overdrive - critical for fault-tolerant industrial signal conditioning where inputs may transiently exceed supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Accuracy | ±0.05% max initial error ensures ≤500µV output error for 1V differential input - sufficient for 12-bit ADC front-end interfacing without calibration. |
| CMRR | 90dB min (at DC–10kHz) rejects common-mode noise from motor drives or long sensor cables, preserving µV-level signal integrity. |
| Quiescent Current | 160µA per amplifier enables dual-channel operation at <320µA total - suitable for always-on battery monitoring systems. |
| Input Voltage Range | Extends to 2×(V–) and nearly 2×(V+) - allows direct measurement of shunt voltages referenced to negative bus (e.g., –12V rail) without level-shifting circuitry. |
| Small-Signal Bandwidth | 300kHz –3dB bandwidth supports fast transient detection in power supply monitors and motor current feedback loops. |
| Offset Voltage | ±250µV max (TYP ±75µV) minimizes baseline error in precision weight scales and medical sensor interfaces. |
| Slew Rate | 0.1V/µs enables clean 10V step response within 88µs to 0.01% - adequate for 10kHz sinusoidal signal reconstruction. |
Pinout & Package
INA2132UA/2K5E4 is housed in a 14-pin SOIC (SO-14, package drawing D), RoHS-compliant, with moisture sensitivity level MSL-3 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 11 | No Connection | Internally unconnected; must remain floating or grounded - not usable as heatsink or bias node. |
| 2, 6 | Inverting Input (Ch A/B) | Differential input node for each channel; requires matched source impedance (<8Ω mismatch) to preserve CMRR. |
| 3, 5 | Non-Inverting Input (Ch A/B) | Differential input node; pin 3 pairs with pin 2 (Ch A), pin 5 with pin 6 (Ch B); interchanging degrades gain accuracy. |
| 4 | Negative Supply (V–) | Common return for both channels; supports single-supply operation when tied to ground or negative rail. |
| 8, 14 | Reference Input (Ch B/A) | Output offset reference point; applying voltage here sums into output - used for offset nulling or level shifting. |
| 9, 13 | Output (Ch B/A) | Amplified differential output; capable of sourcing/sinking ±12mA into 10kΩ load while maintaining linearity. |
| 10, 12 | Sense Input (Ch B/A) | Internal connection to resistor network; must be wired directly to shunt/load - not accessible externally. |
| 11 | V+ | Positive supply rail; accepts 2.7V to 36V (single) or ±1.35V to ±18V (dual); bypass capacitor required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed resistor network | Enables ±0.05% gain accuracy and <0.001% nonlinearity without external trimming - reduces BOM count and calibration labor. |
| Rail-to-rail input common-mode range | Supports differential measurements where inputs exceed supply rails (e.g., –15V to +35V on +5V supply), eliminating need for external attenuators or level shifters. |
| Channel independence | DC channel separation >140dB prevents crosstalk-induced errors in dual-sensor systems like 3-phase current monitoring. |
| Stable 10nF capacitive load drive | Allows direct connection to long PCB traces or ADC input filters without stability-compensation networks - simplifies layout and reduces component count. |
| Extended temperature operation | Specified from –40°C to +85°C with guaranteed performance - suitable for automotive cabin electronics and industrial PLC I/O modules. |
Applications
| Current Sensing in Motor Drives | Precision Instrumentation Amplifier Core |
|---|---|
Use Scenario: Measuring bidirectional current through H-bridge MOSFETs in 24V BLDC motor controllers. IC Role / Device Role / Timing Role: Dual-channel difference amplifier conditions shunt voltage signals before feeding to MCU ADC, rejecting PWM switching noise via 90dB CMRR. Use Value: Enables accurate torque control with <1% full-scale error across –40°C to +85°C, using only one IC instead of discrete op amp + precision resistor arrays. | Use Scenario: Building a low-drift, high-CMRR instrumentation amplifier for strain gauge bridge outputs in structural health monitoring. IC Role / Device Role / Timing Role: Serves as first-stage G=1 differential amplifier in 3-op-amp IA topology, providing matched gain and thermal tracking for offset stability. Use Value: Laser-trimmed resistor matching delivers <1µV/°C drift contribution - outperforming discrete solutions requiring manual resistor pairing. |
| Battery Voltage Monitoring | Ground Loop Elimination in Data Acquisition |
Use Scenario: Simultaneous monitoring of individual cell voltages in 12S Li-ion battery packs with shared microcontroller reference. IC Role / Device Role / Timing Role: Each channel measures differential voltage across a cell while rejecting common-mode noise from shared pack ground. Use Value: 160µA per amplifier quiescent current extends battery life in always-on monitoring systems; rail-to-rail input accommodates cells near end-of-discharge (≤2.5V). | Use Scenario: Interfacing isolated thermocouple sensors to a central DAQ system with shared earth reference. IC Role / Device Role / Timing Role: Rejects ground potential differences (>10V) between sensor and DAQ chassis, preventing 50/60Hz hum and DC offsets. Use Value: 90dB CMRR at 60Hz eliminates >99.9% of ground-loop induced error - enabling µV-resolution measurements without 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 |
|---|---|---|---|
| INA2133UA/2K5 | G = 100 fixed gain; higher offset (±1mV), same SO-14 package and supply range. | Optimized for millivolt-level sensor signals (e.g., RTDs), not unity-gain shunt sensing. | Select INA2133UA/2K5 only when high closed-loop gain is required and input signal amplitude is <10mV. |
| AD8276ARZ-RL | G = 0.2 to 10 programmable via external resistors; 125µA IQ; 85dB CMRR; SO-8 package. | Requires external gain-setting resistors and has lower CMRR - less suitable for high-noise industrial environments. | Choose AD8276ARZ-RL when flexible gain configuration is needed and board space is constrained (SO-8 vs SO-14). |
Compared with INA2132UA/2K5E4, INA2133UA/2K5 trades unity-gain precision for higher sensitivity, while AD8276ARZ-RL sacrifices guaranteed CMRR and laser-trimmed accuracy for gain flexibility and smaller footprint - making INA2132UA/2K5E4 optimal for cost-sensitive, high-accuracy, dual-channel differential sensing where G = 1 is fixed.
Availability
INA2132UA/2K5E4 is available at Aetrix Electronics and suitable for current sensing in motor drives, precision instrumentation amplifier building blocks, battery voltage monitoring, and ground loop elimination requiring stable component supply across industrial temperature ranges.
Supply support for INA2132UA/2K5E4 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 signal conditioning dating back to Burr-Brown acquisition in 2000.
The INA2132UA/2K5E4 belongs to TI's precision difference amplifier product line, engineered for high-accuracy, low-power, rail-to-rail input signal conditioning in industrial, automotive, and test equipment where laser-trimmed resistor matching and guaranteed CMRR are critical.
FAQ
What is the maximum input common-mode voltage for INA2132UA/2K5E4 when operating on a +5V single supply?
With +5V single supply and VREF = 0V, the input common-mode voltage range is –2.5V to +5.5V per the datasheet. This is derived from the formula 2(V–) – VREF < VCM < 2((V+) – 1) – VREF, where V– = 0V and V+ = +5V. The INA2132UA/2K5E4 maintains specified performance across this full range, enabling measurement of differential signals referenced below ground - a key advantage over standard op amps.
Does INA2132UA/2K5E4 require external gain-setting resistors?
No, INA2132UA/2K5E4 does not require external gain-setting resistors. It integrates laser-trimmed 40kΩ precision resistor networks internally to achieve fixed unity gain (G = 1) with ±0.05% max error. This eliminates resistor matching tolerances and thermal drift concerns inherent in discrete implementations - a core design feature confirmed in the device description and pinout diagram of the INA2132UA/2K5E4 datasheet.
Can INA2132UA/2K5E4 drive a 10nF capacitive load stably?
Yes, INA2132UA/2K5E4 is specified to operate stably with up to 10nF capacitive load, as stated in the Absolute Maximum Ratings and verified in the "Capacitive Load Drive Capability" section. This allows direct interface to anti-aliasing filters or long PCB traces without external isolation resistors or compensation networks - a validated capability critical for data acquisition systems using the INA2132UA/2K5E4.
What is the quiescent current per channel for INA2132UA/2K5E4 at +25°C?
The quiescent current per channel for INA2132UA/2K5E4 is ±160µA (typical ±155µA, max ±185µA) at TA = +25°C and IO = 0mA, as specified under "POWER SUPPLY" in the electrical characteristics table. This ultra-low current enables dual-channel operation at <320µA total - a confirmed parameter essential for battery-powered applications using the INA2132UA/2K5E4.
Is INA2132UA/2K5E4 pin-compatible with INA2132U/2K5?
Yes, INA2132UA/2K5E4 is pin-compatible with INA2132U/2K5. Both share identical SO-14 (D) package, pinout, and electrical specifications - differing only in tape-and-reel packaging quantity (2500 pcs/reel) and marking (INA2132U vs INA2132UA). The "A" suffix denotes tape-and-reel packaging per TI's ordering nomenclature, and the E4 suffix indicates lead (Pb)-free finish - all confirmed in TI's Package Option Addendum for INA2132UA/2K5E4.
INA2132UA/2K5E4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
INA2132UA/2K5E4 FAQ
1.How can I place an order for INA2132UA/2K5E4 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA2132UA/2K5E4 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 INA2132UA/2K5E4 reliable?
The price and inventory of INA2132UA/2K5E4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA2132UA/2K5E4 is usually 5 days.
3.What payment methods are accepted for INA2132UA/2K5E4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA2132UA/2K5E4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA2132UA/2K5E4?
INA2132UA/2K5E4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA2132UA/2K5E4 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 INA2132UA/2K5E4?
For technical support, including INA2132UA/2K5E4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA2132UA/2K5E4 requirements.
6.How does Aetrix verify that INA2132UA/2K5E4 is sourced from the original manufacturer or authorized distributors?
All INA2132UA/2K5E4 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 INA2132UA/2K5E4 meets industry standards.
7.What is the process for return or replacement of INA2132UA/2K5E4?
All INA2132UA/2K5E4 units undergo pre-shipment inspection (PSI). If there is an issue with INA2132UA/2K5E4, 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 INA2132UA/2K5E4 part is unused and in its original packaging.
Return procedure for INA2132UA/2K5E4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA2132UA/2K5E4 Tags
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