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Texas Instruments INA2133UA/2K5G4
- Part No.:
- INA2133UA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA2133UA/2K5G4.pdf
- Description:
- IC OPAMP DIFF 2 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,295
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Product details
Overview
INA2133UA/2K5G4 from Texas Instruments is a dual-channel, high-speed precision difference amplifier used for accurate differential signal conditioning in industrial measurement and feedback systems. It delivers ±450 μV max offset voltage, 1.5 MHz bandwidth, ±2.25 V to ±18 V dual-supply operation, and operates across −40°C to +85°C - enabling precise current sensing in servo drives and battery test equipment.
For engineers reviewing the INA2133UA/2K5G4 datasheet, INA2133UA/2K5G4 pinout, INA2133UA/2K5G4 application, or INA2133UA/2K5G4 equivalent, key selection considerations include guaranteed CMRR ≥74 dB over temperature, dual-channel independence for low crosstalk, and laser-trimmed on-chip 25 kΩ resistor network ensuring <0.05% gain error and stable performance under rail-to-rail common-mode input conditions.
Technical Context
The INA2133UA/2K5G4 integrates two independent precision op-amps with matched on-die 25 kΩ resistor networks (R1/R2 and R3/R4 ratio-trimmed), enabling unity-gain difference amplification without external components. Its internal architecture supports input common-mode voltages extending beyond supply rails (2×V−+3 V to 2×V++3 V) via resistive attenuation prior to the op-amp inputs.
It features two chip site origins (CSO: SHE and CSO: RFB), with distinct slew rates (5 V/μs vs 20 V/μs) and noise profiles (e.g., 80 nV/√Hz at 10 Hz for CSO: SHE). The device operates in a single functional mode - no configuration pins or control logic - and requires no external trimming for offset or gain calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 1.5 MHz (–3 dB): enables accurate amplification of fast-changing differential signals up to audio frequencies in real-time monitoring systems. |
| Offset voltage (max) | ±450 μV at TA = 25°C, VS = ±15 V: ensures ≤0.9 mV output error in 2 V full-scale measurements without calibration. |
| Gain error (max) | ±0.05% at VS = ±15 V or ±5 V: maintains consistent scaling across channels and supply voltages for multi-sensor data acquisition. |
| Slew rate | 5 V/μs (CSO: SHE) or 20 V/μs (CSO: RFB): supports clean step response for transient detection in motor control feedback loops. |
| Common-mode rejection | ≥74 dB (UA variant, VS = ±15 V, VCM = 2×V−+3 V to 2×V++3 V): rejects noise from shared power rails or ground bounce in high-noise industrial environments. |
| Supply range | ±2.25 V to ±18 V (dual) or +4.5 V to +36 V (single): allows direct interface with legacy ±15 V analog systems or modern 12 V/24 V industrial buses. |
| Quiescent current | ±0.95 mA per channel: enables low-power operation in battery-powered sensor tags and portable test equipment. |
Pinout & Package
INA2133UA/2K5G4 is housed in a SOIC-14 surface-mount package (8.65 mm × 6.00 mm), rated for industrial temperature range (−40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +In A (Pin 3) | Noninverting input, Channel A | Connects to 25 kΩ resistor network; forms high-impedance differential input node for Channel A with matched source impedance requirement. |
| −In A (Pin 2) | Inverting input, Channel A | Connects to 25 kΩ resistor network; must match source impedance to +In A to preserve CMRR ≥74 dB. |
| +In B (Pin 5) | Noninverting input, Channel B | Independent input path for second differential channel; fully isolated from Channel A to prevent crosstalk during overload. |
| −In B (Pin 6) | Inverting input, Channel B | Matches +In B impedance; enables simultaneous dual-sensor monitoring without inter-channel interference. |
| Out A (Pin 13) | Output, Channel A | Unity-gain buffered output capable of sourcing/sinking ≥25 mA (CSO: SHE); drives 10 kΩ loads with <0.01% settling in 5.5 μs. |
| Out B (Pin 9) | Output, Channel B | Electrically isolated output stage; maintains accuracy even if Channel A is shorted or saturated. |
| Ref A (Pin 14) | Reference input, Channel A | DC offset summation node; accepts external voltage (e.g., 2.5 V reference) to level-shift output; requires <10 Ω source impedance. |
| Ref B (Pin 8) | Reference input, Channel B | Independent level-shift control for Channel B; enables differential-to-single-ended conversion with programmable output baseline. |
| Sense A (Pin 12) | Sense input, Channel A | Internal connection point for resistor divider; not externally accessible - used only for internal signal routing and protection. |
| Sense B (Pin 10) | Sense input, Channel B | Same function as Sense A; part of internal 25 kΩ network - not intended for external connection. |
| V+ (Pin 11) | Positive supply | Highest potential supply rail; supports up to +18 V in dual-supply or +36 V in single-supply configurations. |
| V− (Pin 4) | Negative supply | Lowest potential supply rail; supports down to −18 V in dual-supply or GND in single-supply mode. |
| NC (Pins 1, 7) | No internal connection | Unbonded pins; must be left floating - no routing or grounding required for SOIC-14 mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed 25 kΩ resistor network | Ensures <0.05% gain error and <±5 μV/°C offset drift by matching R1/R2 and R3/R4 ratios on-chip - eliminating discrete resistor tolerance and TCR mismatch errors. |
| Rail-to-rail input common-mode range | Supports inputs from (2×V−)+3 V to (2×V+)-3 V - e.g., −27 V to +33 V with ±15 V supplies - enabling direct measurement of shunt voltages across high-side or low-side current sense points. |
| Dual-channel isolation | Zero functional coupling between Channel A and B - one channel can be overdriven or shorted without affecting the other's output accuracy or settling behavior. |
| Fast 0.01% settling time | 5.5 μs with 10 V step and 100 pF load - critical for high-throughput battery cell formation where cycle times demand sub-10 μs measurement windows. |
| Low 950 μA quiescent current per channel | Enables continuous monitoring in always-on sensor tags and data loggers powered by coin cells or energy-harvesting sources. |
Applications
| Battery Cell Formation & Test Equipment | Servo Drive Position Feedback |
|---|---|
|
Use Scenario: Precise real-time monitoring of voltage differentials across individual Li-ion cells during charge/discharge cycling at up to 1 C rate. IC Role / Device Role / Timing Role: Dual-channel difference amplifier conditioning shunt-based current and voltage sense signals with simultaneous acquisition and rail-to-rail input capability. Use Value: Enables <±0.05% current measurement accuracy over −40°C to +85°C, supporting ISO 16750-4 compliance for automotive battery test systems. |
Use Scenario: Closed-loop position control in industrial servo motors using resolver or encoder feedback with analog signal conditioning. IC Role / Device Role / Timing Role: High-bandwidth (1.5 MHz), low-latency (<5.5 μs) differential amplifier converting resolver sine/cosine outputs into clean, noise-immune signals for ADC sampling. Use Value: Maintains >74 dB CMRR under PWM switching noise (10–20 kHz), preventing position error accumulation in motion control systems. |
| Sensor Tag & Data Logger | String Inverter Monitoring |
|
Use Scenario: Multi-sensor environmental logging (temperature, humidity, strain) in remote, battery-powered field deployments lasting >1 year. IC Role / Device Role / Timing Role: Low-quiescent-current (950 μA/channel) dual amplifier front-end for ratiometric bridge sensors and thermistor interfaces. Use Value: Delivers ±450 μV max offset and <±5 μV/°C drift - reducing calibration frequency and enabling <0.1°C thermal resolution without software compensation. |
Use Scenario: DC string voltage and current monitoring in photovoltaic solar inverters with multiple MPPT inputs and high common-mode transients. IC Role / Device Role / Timing Role: Isolated differential amplifier measuring shunt-based current and bus voltage while rejecting >1 kV/ms dv/dt noise from IGBT switching. Use Value: Sustains 74 dB CMRR at 100 kHz and operates from ±15 V supplies - enabling direct integration into existing inverter analog front-ends without redesign. |
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 | Specified for CSO: SHE only (5 V/μs slew rate, 80 nV/√Hz noise at 10 Hz); tighter initial offset (±150 μV max) but same package and pinout. | Preferred for low-noise, moderate-speed applications like precision data loggers where slew rate >5 V/μs is unnecessary. | Select INA2133U/2K5 when lower broadband noise and guaranteed CSO origin are required; INA2133UA/2K5G4 offers broader CSO flexibility and higher slew rate option. |
| INA282AIDR | Current-sense amplifier (not difference amp); fixed 50 V/V gain, 800 kHz BW, ±2 μV/°C drift, SOIC-8 package - no dual-channel or reference input capability. | Optimized for unidirectional high-side current sensing only; lacks independent reference inputs and dual-channel architecture. | Choose INA282AIDR only for dedicated current-shunt amplification; INA2133UA/2K5G4 provides configurable difference amplification, dual channels, and rail-to-rail common-mode range. |
Compared with INA2133U/2K5 and INA282AIDR, the INA2133UA/2K5G4 uniquely combines dual-channel independence, programmable reference inputs, and CSO-flexible slew rate - making it the only option among the three suitable for simultaneous differential voltage and current sensing in servo drive feedback loops.
Availability
INA2133UA/2K5G4 is available at Aetrix Electronics and suitable for battery test systems, servo motor controllers, solar string inverters, and industrial sensor tags requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for INA2133UA/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 is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision signal chain solutions.
The INA2133UA/2K5G4 belongs to TI's INAx133 family of high-speed precision difference amplifiers, designed specifically for industrial measurement systems demanding rail-to-rail input operation, dual-channel isolation, and laser-trimmed resistor accuracy without external components.
FAQ
What is the maximum common-mode input voltage range supported by the INA2133UA/2K5G4?
The INA2133UA/2K5G4 supports an input common-mode voltage range from (2 × V−) + 3 V to (2 × V+) − 3 V. With ±15 V supplies, this extends from −27 V to +33 V - well beyond the supply rails. This enables direct high-side or low-side shunt measurement without level-shifting circuitry, and is confirmed in Section 5.4 (VCM specification) and Figure 5-5 of the SBOS115B datasheet for INA2133UA/2K5G4.
Does the INA2133UA/2K5G4 require external resistors for unity-gain difference amplification?
No, the INA2133UA/2K5G4 does not require external resistors for unity-gain difference amplification. It integrates four laser-trimmed 25 kΩ on-die resistors configured as a precision difference amplifier network. This eliminates external component count, layout sensitivity, and resistor mismatch errors - a core feature confirmed in Section 3 (Description) and Section 6.1 (Overview) of the INA2133UA/2K5G4 datasheet.
What is the guaranteed gain error specification for the INA2133UA/2K5G4 over temperature?
The INA2133UA/2K5G4 has a guaranteed maximum gain error of ±0.05% at TA = 25°C and VS = ±15 V or ±5 V, with gain drift limited to ±10 ppm/°C over −40°C to +85°C. These values are explicitly specified in Table 5-4 (Electrical Characteristics) of the SBOS115B datasheet for the UA variant, and apply directly to the INA2133UA/2K5G4 part number.
Can both channels of the INA2133UA/2K5G4 operate independently under fault conditions?
Yes, both channels of the INA2133UA/2K5G4 operate fully independently. Section 7.1 states that "all circuitry is completely independent in the dual version to provide lowest crosstalk and normal behavior when one amplifier is overdriven or short-circuited." This electrical isolation is inherent to the SOIC-14 die layout and confirmed in the functional block diagram (Figure 6-1/6-2) and pin descriptions for INA2133UA/2K5G4.
What is the minimum recommended supply voltage for reliable operation of the INA2133UA/2K5G4?
The INA2133UA/2K5G4 is specified for reliable operation down to ±2.25 V dual supply (or +4.5 V single supply), as stated in Section 5.2 (Recommended Operating Conditions). Performance parameters such as bandwidth and slew rate are derated below ±5 V, but functionality remains guaranteed across the full −40°C to +85°C range - a specification verified in the absolute maximum ratings and typical characteristics sections of the INA2133UA/2K5G4 datasheet.
INA2133UA/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:
- Differential
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.5 MHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 950µA
- Current - Output / Channel:
- 32 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
INA2133UA/2K5G4 FAQ
1.How can I place an order for INA2133UA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA2133UA/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 INA2133UA/2K5G4 reliable?
The price and inventory of INA2133UA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA2133UA/2K5G4 is usually 5 days.
3.What payment methods are accepted for INA2133UA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA2133UA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA2133UA/2K5G4?
INA2133UA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA2133UA/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 INA2133UA/2K5G4?
For technical support, including INA2133UA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA2133UA/2K5G4 requirements.
6.How does Aetrix verify that INA2133UA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All INA2133UA/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 INA2133UA/2K5G4 meets industry standards.
7.What is the process for return or replacement of INA2133UA/2K5G4?
All INA2133UA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with INA2133UA/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 INA2133UA/2K5G4 part is unused and in its original packaging.
Return procedure for INA2133UA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA2133UA/2K5G4 Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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