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Texas Instruments INA2132U/2K5G4
- Part No.:
- INA2132U/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA2132U/2K5G4.pdf
- Description:
- IC INST AMP 1 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,736
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Product details
Overview
INA2132U/2K5G4 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 INA2132U/2K5G4 datasheet, INA2132U/2K5G4 pinout, INA2132U/2K5G4 application, or INA2132U/2K5G4 equivalent, key selection criteria include guaranteed rail-to-rail input common-mode capability (–2.5V to +5.5V on +5V supply), laser-trimmed resistor network for stable gain accuracy over temperature, and verified 10nF capacitive load drive stability without external compensation.
Technical Context
The INA2132U/2K5G4 integrates two independent precision op amps with matched 40kΩ laser-trimmed thin-film resistor networks, enabling accurate differential-to-single-ended conversion at G = 1 without external components. Its internal architecture maintains high channel separation (>140dB at DC) and avoids output phase reversal during input overdrive.
Each channel features an input stage with extended common-mode range (down to V– and up to 2×(V+) – 2V), supporting measurements of differential signals exceeding supply rails. The device's TCR-matched resistors ensure <±10 ppm/°C gain drift and preserve 90dB CMRR across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Accuracy | ±0.05% max initial error - ensures <0.5mV output error for 1V differential input at room temperature. |
| CMRR | 90dB min (VCM = –30V to 28V) - rejects >31,600:1 common-mode interference in noisy industrial environments. |
| Quiescent Current | 160µA per amplifier - enables multi-channel monitoring in energy-constrained systems like portable data loggers. |
| Input Voltage Range | –2.5V to +5.5V on +5V supply - measures differential signals with common-mode offset beyond supply rails (e.g., shunt voltage in high-side current sensing). |
| Small-Signal Bandwidth | 300kHz (–3dB) - supports accurate amplification of fast transients in motor control feedback loops. |
| Output Drive | Stable with 10nF capacitive load - eliminates need for isolation resistors when driving ADC input filters or long PCB traces. |
| Offset Voltage | ±150µV max (initial, +5V supply) - contributes <0.015% error in 1V full-scale measurement systems. |
Pinout & Package
INA2132U/2K5G4 is housed in a 14-pin SOIC (SO-14, package drawing D), RoHS-compliant, moisture sensitivity level 3 (260°C peak reflow), with 1.27mm pitch and 8.65mm × 3.91mm body dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 11 | No Connection (NC) | Internally unconnected; must remain floating or grounded per layout best practice to minimize coupling. |
| 2, 6 | Inverting Input (–In A / –In B) | Differential input node; matched impedance required (<8Ω mismatch) to preserve specified CMRR. |
| 3, 5 | Non-Inverting Input (+In A / +In B) | Differential input node; paired with corresponding –In pin to define channel input path. |
| 4 | Negative Supply (V–) | Reference for negative rail; common-mode input extends to this pin (no level-shifting required). |
| 8, 14 | Reference Output (Ref B / Ref A) | Output reference point; applying voltage here offsets output (e.g., nulling offset or level shifting). |
| 9, 13 | Output (Out B / Out A) | Single-ended output; swing limited to (V–)+0.15V to (V+)-0.8V (10kΩ load) - defines usable dynamic range. |
| 10, 12 | Sense Terminal (Sense B / Sense A) | Internal connection to resistor network; must tie directly to load/shunt to avoid gain error from trace resistance. |
| 11 | Positive Supply (V+) | Positive rail connection; supports up to +36V, enabling direct interface with 24V industrial buses. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed resistor network | 40kΩ ratio-matched thin-film resistors guarantee ±0.05% gain error and <±10 ppm/°C drift - eliminates manual calibration in production test. |
| Rail-to-rail input common-mode range | Operates with inputs as low as V– and as high as 2×(V+)–2V - enables high-side current sensing without level-shifting circuitry. |
| Channel independence | No shared bias circuitry between channels; >140dB dc channel separation prevents crosstalk in dual-sensor systems (e.g., dual-phase motor current monitoring). |
| Capacitive load stability | Unconditionally stable with 10nF load - simplifies anti-aliasing filter design and supports direct connection to SAR ADCs with input capacitance. |
| Extended temperature operation | Specified from –40°C to +85°C with full parameter guarantees - suitable for automotive under-hood and industrial control cabinet deployments. |
Applications
| Battery-Powered Instrumentation | High-Side Current Sensing |
|---|---|
Use Scenario: Portable multimeter measuring µA–mA currents using shunt resistor and low-voltage microcontroller ADC. IC Role / Device Role / Timing Role: Difference amplifier conditioning shunt voltage while rejecting battery common-mode noise and supply ripple. Use Value: 160µA per amplifier quiescent current extends battery life; rail-to-rail input captures full shunt signal even at low battery voltage (e.g., 2.7V cutoff). |
Use Scenario: Monitoring motor phase current in 24V BLDC drive where shunt resides between power rail and load. IC Role / Device Role / Timing Role: High-common-mode difference amplifier converting shunt voltage to ground-referenced signal for controller ADC. Use Value: Input common-mode range up to +50V (on ±18V supply) tolerates bus transients; 90dB CMRR suppresses PWM switching noise. |
| Ground Loop Elimination | Precision Summing Amplifier |
Use Scenario: Interfacing isolated sensor outputs (e.g., thermocouple DAQ) to non-isolated host system without introducing earth-loop currents. IC Role / Device Role / Timing Role: Differential receiver rejecting common-mode voltage induced by separate grounding points. Use Value: 90dB CMRR attenuates 316× common-mode interference; dual-channel design allows simultaneous rejection on two analog channels. |
Use Scenario: Combining outputs from dual-output DACs into single-ended sum for analog control loop (e.g., PID output combining). IC Role / Device Role / Timing Role: Precision unity-gain inverting summer with matched internal resistors ensuring <0.05% gain matching between inputs. Use Value: Laser-trimmed 40kΩ network eliminates external resistor matching; 0.001% nonlinearity preserves fidelity in closed-loop control applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA2133U/2K5 | G = 100 fixed gain; higher gain error (±0.1%), same SO-14 package and quiescent current. | Used where higher sensitivity is needed (e.g., µV-level shunt sensing), but sacrifices common-mode range margin due to reduced input headroom. | Select INA2133U/2K5 only when fixed high gain is required and input common-mode voltage stays within tighter bounds (±1.2V). |
| AD8271ARMZ | Single-channel, G = 1/2, 1/1, 2, 5, 10 programmable via external resistor; 125µA IQ; 85dB CMRR. | Offers flexible gain configuration but requires external precision resistor and lacks dual-channel integration. | Choose AD8271ARMZ when system needs configurable gain per channel and board space allows discrete resistor placement and routing. |
Compared with INA2132U/2K5G4, INA2133U/2K5 trades rail-to-rail input capability for higher gain, while AD8271ARMZ provides gain flexibility at the cost of added component count and reduced channel density - making INA2132U/2K5G4 optimal for space-constrained dual-channel, unity-gain precision sensing.
Availability
INA2132U/2K5G4 is available at Aetrix Electronics and suitable for battery-powered instrumentation, high-side current sensing, ground loop elimination, and precision summing amplifier applications requiring stable component supply and long-term industrial temperature support.
Supply support for INA2132U/2K5G4 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 acquired Burr-Brown in 2000 and maintains its precision analog portfolio, emphasizing high-accuracy signal conditioning for industrial, automotive, and medical applications.
The INA2132U/2K5G4 belongs to TI's legacy precision difference amplifier product line, designed specifically for low-cost, low-power, rail-to-rail input instrumentation requiring no external gain-setting components.
FAQ
What is the maximum common-mode input voltage supported by the INA2132U/2K5G4 on a +5V single supply?
The INA2132U/2K5G4 supports a common-mode input voltage range of –2.5V to +5.5V when operated on a +5V single supply. This extended range allows measurement of differential signals whose common-mode level exceeds the positive rail - critical for high-side current sensing where the shunt sits between VBUS and load. The specification is validated per datasheet Section "SPECIFICATIONS: VS = +5V Single Supply".
Can the INA2132U/2K5G4 drive a 10nF capacitive load without oscillation?
Yes, the INA2132U/2K5G4 is explicitly characterized for stable operation with up to 10nF capacitive load, as confirmed in the Absolute Maximum Ratings table and Typical Performance Curves ("Settling Time vs Load Capacitance"). No external series resistor or compensation network is required, simplifying interface to ADC input filters or long PCB traces in data acquisition systems.
How does the laser-trimmed resistor network in the INA2132U/2K5G4 improve system-level accuracy?
The laser-trimmed 40kΩ thin-film resistor network in the INA2132U/2K5G4 achieves ±0.05% initial gain error and <±10 ppm/°C gain drift, eliminating the need for system-level gain calibration. This directly reduces test time and BOM cost in production, especially in dual-channel applications where channel-to-channel matching is critical - such as differential sensor pairs in industrial process control.
Is the INA2132U/2K5G4 pin-compatible with the INA2132UA/2K5 variant?
Yes, the INA2132U/2K5G4 and INA2132UA/2K5 share identical SO-14 pinout, electrical specifications, and thermal characteristics. The "A" suffix denotes enhanced ESD protection (4kV HBM), but pin assignment, function, and footprint are fully interchangeable - allowing drop-in replacement in existing designs without layout changes.
What is the purpose of the Sense pins (pins 10 and 12) on the INA2132U/2K5G4?
The Sense A (pin 12) and Sense B (pin 10) terminals on the INA2132U/2K5G4 connect directly to the internal precision resistor network's Kelvin sense points. They must be wired to the shunt resistor's load-side terminals to eliminate errors from PCB trace resistance - ensuring that gain remains defined solely by the laser-trimmed resistors, not parasitic impedances in the signal path.
INA2132U/2K5G4 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
INA2132U/2K5G4 FAQ
1.How can I place an order for INA2132U/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA2132U/2K5G4 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/2K5G4 reliable?
The price and inventory of INA2132U/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA2132U/2K5G4 is usually 5 days.
3.What payment methods are accepted for INA2132U/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA2132U/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA2132U/2K5G4?
INA2132U/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA2132U/2K5G4 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/2K5G4?
For technical support, including INA2132U/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA2132U/2K5G4 requirements.
6.How does Aetrix verify that INA2132U/2K5G4 is sourced from the original manufacturer or authorized distributors?
All INA2132U/2K5G4 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/2K5G4 meets industry standards.
7.What is the process for return or replacement of INA2132U/2K5G4?
All INA2132U/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with INA2132U/2K5G4, 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/2K5G4 part is unused and in its original packaging.
Return procedure for INA2132U/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA2132U/2K5G4 Tags
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