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Texas Instruments OPA2132UA/2K5G4
- Part No.:
- OPA2132UA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2132UA/2K5G4.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,209
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Product details
Overview
OPA2132UA/2K5G4 from Texas Instruments is a dual-channel, FET-input operational amplifier optimized for high-impedance signal conditioning in precision data acquisition systems. It delivers 8MHz gain-bandwidth, 20V/µs slew rate, 8nV/√Hz input voltage noise at 1kHz, ≤500µV input offset voltage, and operates from ±2.5V to ±18V supplies - enabling accurate buffering of photodiode and SAR ADC reference signals.
For engineers reviewing the OPA2132UA/2K5G4 datasheet, OPA2132UA/2K5G4 pinout, OPA2132UA/2K5G4 application, or OPA2132UA/2K5G4 equivalent, this page provides verified specifications, SOIC-8 pin mapping, real-world use cases in trans-impedance and active filter designs, and two validated alternative parts with documented functional trade-offs.
Technical Context
The OPA2132UA/2K5G4 uses JFET-input cascode architecture to maintain ≤50pA max input bias current across its full ±13V common-mode range while rejecting supply and common-mode disturbances up to 94dB. Its unity-gain-stable internal compensation enables stable operation into ≥100pF capacitive loads without external compensation.
Each amplifier channel operates independently with no crosstalk - critical for dual-path signal chains - and features rail-to-rail output swing capability (±1.1V from rails at 2kΩ load) and fast overload recovery (600ns), making it suitable for dynamic sensor interfaces and multiplexed analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 8MHz gain-bandwidth product - supports stable closed-loop gain ≥1 with ≤0.1% settling in under 1µs for 10V steps. |
| Slew Rate | 20V/µs - enables distortion-free amplification of fast-rising sensor pulses and DAC outputs up to ~300kHz. |
| Input Noise | 8nV/√Hz at 1kHz - preserves SNR in low-level photodiode and strain gauge signal paths. |
| Input Bias Current | ≤50pA max - minimizes voltage error in MΩ-range feedback networks and high-Z source interfaces. |
| Offset Voltage | ≤500µV max - reduces DC error in precision integrators and reference buffers without trimming. |
| Supply Range | ±2.5V to ±18V - supports industrial ±15V rails and low-voltage portable systems down to ±2.5V. |
| Open-Loop Gain | 126dB (2kΩ load) - ensures <0.001% gain error in 100× closed-loop configurations. |
Pinout & Package
OPA2132UA/2K5G4 is packaged in an 8-pin SOIC (D package) with exposed pad not connected. Pin functions are electrically isolated per channel, supporting independent operation even under overdrive or short-circuit conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads up to 2kΩ with ±1.1V headroom from rails. |
| 2 | –IN A | Inverting input, channel A - accepts differential or single-ended feedback networks. |
| 3 | +IN A | Noninverting input, channel A - high-impedance node (10¹³Ω || 7pF) for sensor or reference connection. |
| 4 | V– | Negative power supply - must be decoupled with 10nF ceramic capacitor near pin. |
| 5 | +IN B | Noninverting input, channel B - identical specs to +IN A; fully independent from channel A. |
| 6 | –IN B | Inverting input, channel B - no crosstalk to channel A even during overload. |
| 7 | OUT B | Amplifier B output - matches OUT A performance; usable for dual-path filtering or differential drive. |
| 8 | V+ | Positive power supply - requires local 10nF bypass to ground for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal on common-mode overrange | Eliminates catastrophic output inversion in voltage-follower configurations when input exceeds rails - critical for control-loop stability. |
| Independent dual-channel architecture | Zero crosstalk between channels ensures simultaneous operation in dual ADC drivers or stereo audio paths without interaction. |
| Laser-trimmed input offset | Guarantees ≤500µV max VOS and ≤10µV/°C drift - removes need for external nulling in production systems. |
| High capacitive load drive | Stable with ≥100pF load capacitance - simplifies PCB layout for long traces or LCD driver interfaces without isolation resistors. |
| Low distortion | 0.00008% THD+N at 1kHz - preserves fidelity in audio preamps and precision waveform generation. |
Applications
| Photodiode Amplifier | SAR ADC Driver |
|---|---|
Use Scenario: Converting weak current from a reverse-biased photodiode into a stable voltage signal for digitization. IC Role / Device Role / Timing Role: Trans-impedance amplifier (TIA) with FET-input preserving high source impedance and low noise floor. Use Value: 8nV/√Hz noise and ≤50pA IB enable detection of sub-nA photocurrents without degrading SNR. |
Use Scenario: Driving the switched-capacitor input of a 16-bit SAR ADC requiring fast settling and low charge kickback. IC Role / Device Role / Timing Role: High-speed buffer isolating ADC input from driving circuitry while maintaining linearity. Use Value: 0.01% settling in 1µs and 20V/µs slew rate ensure full-scale transitions settle before next conversion cycle. |
| Voltage Reference Buffer | Active Filter |
Use Scenario: Isolating a precision voltage reference (e.g., REF5025) from variable load currents in multi-channel DAQ systems. IC Role / Device Role / Timing Role: Unity-gain follower providing low-output-impedance, high-PSRR interface to downstream circuits. Use Value: 94dB PSRR and 126dB open-loop gain minimize reference voltage perturbation under dynamic load changes. |
Use Scenario: Implementing a 2nd-order low-pass filter at 30kHz for anti-aliasing prior to ADC sampling. IC Role / Device Role / Timing Role: Active filter stage using OPA2132UA/2K5G4's wide bandwidth and low distortion. Use Value: 8MHz GBW and 0.00008% THD+N ensure flat passband response and minimal harmonic contamination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual FET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2156IDR | Lower noise (3nV/√Hz), wider bandwidth (25MHz), rail-to-rail inputs - but higher quiescent current (1.6mA vs 4.4mA per amp). | Better for wideband photodiode amps or high-speed active filters; less ideal for low-power battery systems. | Select OPA2156IDR when bandwidth/noise dominate; retain OPA2132UA/2K5G4 for legacy ±15V industrial designs with tight power budgets. |
| AD823ARZ | Higher input bias current (1pA typical, but not specified max), lower GBW (16MHz), no guaranteed phase-reversal immunity. | Suitable for general-purpose dual op-amp roles but not recommended for high-Z sensor interfaces where OPA2132UA/2K5G4's 50pA max IB is critical. | Choose AD823ARZ only if cost or availability outweighs guaranteed low-IB performance; verify phase behavior in voltage-follower use. |
Compared with OPA2156IDR and AD823ARZ, the OPA2132UA/2K5G4 uniquely balances ultra-low input bias current, proven phase-reversal immunity, and robust ±18V operation - making it the preferred choice for industrial sensor signal chains where reliability under overvoltage stress and high-impedance fidelity are non-negotiable.
Availability
OPA2132UA/2K5G4 is available at Aetrix Electronics and suitable for photodiode amplifiers, SAR ADC drivers, and voltage reference buffers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2132UA/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 company specializing in analog and embedded processing technologies, with decades of leadership in precision op-amp design and manufacturing.
The OPAx132 family was engineered specifically for high-source-impedance, low-noise signal conditioning in industrial data acquisition, medical instrumentation, and test equipment - prioritizing dc accuracy, ac speed, and ruggedness over rail-to-rail convenience.
FAQ
What is the maximum capacitive load the OPA2132UA/2K5G4 can drive stably?
The OPA2132UA/2K5G4 is unity-gain stable and supports capacitive loads up to at least 100pF without external compensation, as confirmed by typical characteristics (Figure 5-16). For loads exceeding 100pF, adding a small series resistor (e.g., 24Ω) at the output maintains stability while preserving bandwidth - a technique validated in TI's layout guidelines and application notes for the OPA2132UA/2K5G4.
Does the OPA2132UA/2K5G4 exhibit phase reversal when input common-mode voltage exceeds supply rails?
No - the OPA2132UA/2K5G4 uses input cascode circuitry that eliminates phase reversal, even when inputs go beyond the supply rails by up to 0.5V. This behavior is explicitly guaranteed in the datasheet (Section 7.1.1) and distinguishes the OPA2132UA/2K5G4 from many legacy FET-input op-amps, making it safe for use in voltage-follower configurations within control loops.
What is the guaranteed maximum input bias current for the OPA2132UA/2K5G4 over temperature?
The OPA2132UA/2K5G4 guarantees ≤50pA maximum input bias current at 25°C, and ≤500pA maximum over the full –40°C to +85°C operating range, as specified in Section 5.7 of the datasheet. This value is measured under high-speed test conditions and reflects worst-case production screening - critical for designing trans-impedance amplifiers with >100MΩ feedback resistors.
Can the OPA2132UA/2K5G4 operate from a single 5V supply?
Yes - the OPA2132UA/2K5G4 supports single-supply operation from 9V to 36V (or ±4.5V to ±18V), meaning a 5V single supply falls below its minimum requirement. The absolute minimum total supply voltage is 5V (±2.5V), so a true 5V single supply is insufficient; use ≥9V single supply or ±2.5V dual supply. This constraint is defined in Section 5.3 Recommended Operating Conditions for the OPA2132UA/2K5G4.
How does the OPA2132UA/2K5G4 compare to the OPA2156 in terms of input voltage noise?
The OPA2132UA/2K5G4 specifies 8nV/√Hz input voltage noise at 1kHz, whereas the OPA2156 achieves 3nV/√Hz at the same frequency - a 2.7× improvement. This difference directly impacts SNR in low-level signal applications like photodiode amplification; however, the OPA2132UA/2K5G4 retains advantages in guaranteed phase-reversal immunity and lower quiescent current (4.4mA vs 1.6mA per amplifier), which may justify its selection in specific industrial contexts.
OPA2132UA/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- OPAx132
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 8 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 4mA (x2 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA2132UA/2K5G4 FAQ
1.How can I place an order for OPA2132UA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2132UA/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 OPA2132UA/2K5G4 reliable?
The price and inventory of OPA2132UA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2132UA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA2132UA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2132UA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2132UA/2K5G4?
OPA2132UA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2132UA/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 OPA2132UA/2K5G4?
For technical support, including OPA2132UA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2132UA/2K5G4 requirements.
6.How does Aetrix verify that OPA2132UA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA2132UA/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 OPA2132UA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA2132UA/2K5G4?
All OPA2132UA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2132UA/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 OPA2132UA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA2132UA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2132UA/2K5G4 Tags
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