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Texas Instruments OPA2132UG4
- Part No.:
- OPA2132UG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2132UG4.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,740
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Product details
Overview
OPA2132UG4 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, 500µV max input offset voltage, and 8nV/√Hz voltage noise at 1kHz - enabling accurate buffering of photodiode and SAR ADC reference signals in industrial sensor interfaces.
For engineers reviewing the OPA2132UG4 datasheet, OPA2132UG4 pinout, OPA2132UG4 application, or OPA2132UG4 equivalent, this page provides verified specifications, SOIC-8 package layout guidance, real-world use cases in trans-impedance and active filter designs, and validated alternative options for sourcing continuity and performance trade-offs.
Technical Context
The OPA2132UG4 employs JFET-input cascode architecture to maintain ultra-low input bias current (≤50pA) across its full ±13V common-mode range while rejecting supply and common-mode disturbances - critical for stable operation in high-gain, high-Z sensor front-ends. Its unity-gain stability and 100pF capacitive load drive capability eliminate external compensation in most configurations.
Each amplifier channel operates independently with no crosstalk, supporting simultaneous use in dual-path signal chains such as differential reference buffering or matched channel filtering. The device functions across ±2.5V to ±18V supplies and is specified from –40°C to +85°C, making it suitable for industrial control and test equipment where thermal drift and rail flexibility matter.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 8MHz gain-bandwidth product - supports stable closed-loop operation up to 30kHz in 2nd-order active filters without peaking. |
| Slew Rate | 20V/µs - enables fast settling (<1µs to 0.01%) for 10V step inputs, essential for SAR ADC driver applications. |
| Input Bias Current | ≤50pA maximum - minimizes voltage error in >1MΩ source impedance circuits like photodiode trans-impedance amplifiers. |
| Voltage Noise | 8nV/√Hz at 1kHz - ensures low-noise signal integrity in precision analog front-ends without requiring additional filtering. |
| Input Offset Voltage | ±500µV maximum - reduces DC error in voltage reference buffers and integrators without external trimming. |
| Supply Range | ±2.5V to ±18V - allows direct interface with legacy industrial rails (±15V) and low-power systems (±3V) without level-shifting. |
| Open-Loop Gain | 126dB into 2kΩ - provides high loop gain for precision closed-loop accuracy, even under heavy resistive loading. |
Pinout & Package
OPA2132UG4 is housed in an 8-pin SOIC (D package), surface-mount package with exposed pad not connected internally. Thermal resistance is 160°C/W junction-to-ambient, requiring minimal copper pour for standard industrial ambient conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads up to 600Ω with ±2.5V swing from rails; stable with ≥100pF capacitance. |
| 2 | –IN A | Inverting input, Channel A - high-impedance node; sensitive to PCB leakage and EMI; requires guard ring in high-Z layouts. |
| 3 | +IN A | Noninverting input, Channel A - cascoded JFET input maintains ≤50pA bias current across full common-mode range. |
| 4 | V– | Negative power supply - must be bypassed with 10nF ceramic capacitor placed <2mm from pin to minimize PSRR degradation. |
| 5 | +IN B | Noninverting input, Channel B - electrically isolated from Channel A; enables independent dual-path signal processing. |
| 6 | –IN B | Inverting input, Channel B - identical AC/DC specs to Pin 2; no crosstalk observed even during overload or phase reversal events. |
| 7 | OUT B | Amplifier B output - fully independent output stage; supports simultaneous driving of separate loads without interaction. |
| 8 | V+ | Positive power supply - shared rail for both amplifiers; requires local 10nF bypass to ground for optimal THD+N performance. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Eliminates catastrophic output inversion when input common-mode exceeds rails - critical for voltage-follower reference buffers. |
| Unity-gain stable | Operates without external compensation in G = 1 configurations, simplifying design of precision gain stages and integrators. |
| Low distortion | 0.00008% THD+N at 1kHz - preserves signal fidelity in audio and communications signal paths without post-processing. |
| High CMRR | 100dB typical at DC - rejects interference from noisy digital supplies in mixed-signal PCBs with shared ground planes. |
| Independent channels | Dual amplifiers share no internal nodes - prevents fault propagation; one channel can be shorted or overdriven without affecting the other. |
Applications
| Photodiode Amplifier | SAR ADC Driver |
|---|---|
|
Use Scenario: Converting weak current from a 1cm² silicon photodiode (100pA–10nA range) into a stable, low-noise voltage for digitization. IC Role / Device Role / Timing Role: Trans-impedance amplifier with 10MΩ feedback resistor; OPA2132UG4 provides low input bias current and 8nV/√Hz noise to maximize SNR. Use Value: Enables sub-16-bit ENOB in optical sensing systems by limiting Johnson and input current noise contributions below 100nV RMS. |
Use Scenario: Driving the switched-capacitor input of a 16-bit SAR ADC (e.g., ADS8860) with full-scale 5Vpp, 100ksps sampling. IC Role / Device Role / Timing Role: Unity-gain buffer with 20V/µs slew rate and 0.01% settling in <1µs - meets ADC aperture time and acquisition window requirements. Use Value: Prevents missing codes and integral nonlinearity errors caused by incomplete settling before sample-and-hold closure. |
| Voltage Reference Buffer | Active Filter |
|
Use Scenario: Isolating and scaling a precision 2.5V bandgap reference (e.g., REF5025) to drive multiple ADC reference inputs and DAC bias networks. IC Role / Device Role / Timing Role: Low-offset, low-drift voltage follower; OPA2132UG4's ±500µV VOS and ±10µV/°C drift preserve reference accuracy across temperature. Use Value: Maintains <0.01% absolute reference stability over –40°C to +85°C, eliminating need for system-level calibration. |
Use Scenario: Implementing a 30kHz 2nd-order low-pass filter in a vibration monitoring front-end with anti-aliasing and noise shaping. IC Role / Device Role / Timing Role: Dual-amplifier Sallen-Key topology; OPA2132UG4's 8MHz GBW and low distortion ensure flat group delay and <0.1dB passband ripple. Use Value: Achieves –40dB/dec attenuation beyond 30kHz while preserving transient response integrity for impact pulse detection. |
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 voltage noise (3nV/√Hz), wider bandwidth (25MHz), rail-to-rail inputs - but higher quiescent current (1.6mA vs 4.8mA per amp). | Better for wideband, low-noise applications (e.g., ultrasound receive chains); less suitable for low-power, high-voltage industrial rails. | Select OPA2156IDR when noise floor or bandwidth dominates; retain OPA2132UG4 for ±18V operation, lower IQ, or legacy design compatibility. |
| ADA4625-2ARMZ | Similar 8MHz GBW and 20V/µs slew rate, but lower input bias current (1pA typ), higher offset drift (1.5µV/°C), and limited to ±15V max supply. | Preferred for ultra-high-Z pH or ion-selective electrode sensors; unsuitable for ±18V systems or tight thermal drift budgets. | Choose ADA4625-2ARMZ only when femtoampere bias current is mandatory; otherwise OPA2132UG4 offers broader supply and thermal robustness. |
Compared with OPA2132UG4, OPA2156IDR trades higher power for significantly better noise and speed, while ADA4625-2ARMZ prioritizes ultra-low bias current at the expense of supply range and temperature stability - making OPA2132UG4 the balanced choice for general-purpose industrial signal conditioning.
Availability
OPA2132UG4 is available at Aetrix Electronics and suitable for photodiode amplification, SAR ADC driving, and precision voltage reference buffering requiring stable component supply across extended temperature and voltage ranges.
Supply support for OPA2132UG4 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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision amplifiers and data converters.
The OPAx132 series was designed specifically for high-source-impedance, precision signal conditioning in industrial, test & measurement, and medical instrumentation - emphasizing dc accuracy, ac speed, and robustness in real-world PCB environments.
FAQ
What is the maximum supply voltage for the OPA2132UG4?
The OPA2132UG4 supports a total supply voltage range of ±2.5V to ±18V (36V total), with absolute maximum rating of 36V across V+ and V– pins. Operation beyond ±18V risks permanent damage per Section 5.1 of the datasheet. For reliable long-term use, TI recommends staying within the recommended operating conditions of ±2.5V to ±15V for production-tested performance.
Does the OPA2132UG4 require external compensation for unity-gain stability?
No, the OPA2132UG4 is internally compensated for unity-gain stability and operates without external components in G = 1 configurations. Its 8MHz gain-bandwidth and 20V/µs slew rate enable stable, low-peaking responses in voltage followers and active filters - confirmed in Figure 5-1 (open-loop gain/phase) and Section 6.3 of the datasheet.
How does the OPA2132UG4 handle input common-mode voltage violations?
The OPA2132UG4 uses input cascode circuitry to prevent phase reversal when the input common-mode voltage exceeds the supply rails - a known failure mode in many FET-input op-amps. As documented in Section 7.1.1, it remains functional and monotonic even when VCM extends beyond (V–) + 2.5V or (V+) – 3.5V, making it safe for use in voltage-follower reference buffers.
What is the thermal resistance of the OPA2132UG4 in SOIC-8 package?
The OPA2132UG4 in SOIC-8 (D package) has a junction-to-ambient thermal resistance (RθJA) of 160°C/W, as specified in Section 5.5. This value assumes standard JEDEC 2-layer board conditions; actual board layout (copper area, via count, airflow) will affect real-world junction temperature - especially important given its 4.8mA per amplifier quiescent current.
Can the OPA2132UG4 drive capacitive loads without oscillation?
Yes, the OPA2132UG4 is characterized for stable operation with ≥100pF capacitive loads, as shown in Figure 5-16 and Section 5.7. For loads >100pF, adding a small series resistor (e.g., 24Ω) between the output and capacitor restores phase margin - a technique validated in the typical application section for 2nd-order filter designs.
OPA2132UG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- OPAx132
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 250 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
OPA2132UG4 FAQ
1.How can I place an order for OPA2132UG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2132UG4 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 OPA2132UG4 reliable?
The price and inventory of OPA2132UG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2132UG4 is usually 5 days.
3.What payment methods are accepted for OPA2132UG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2132UG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2132UG4?
OPA2132UG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2132UG4 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 OPA2132UG4?
For technical support, including OPA2132UG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2132UG4 requirements.
6.How does Aetrix verify that OPA2132UG4 is sourced from the original manufacturer or authorized distributors?
All OPA2132UG4 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 OPA2132UG4 meets industry standards.
7.What is the process for return or replacement of OPA2132UG4?
All OPA2132UG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2132UG4, 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 OPA2132UG4 part is unused and in its original packaging.
Return procedure for OPA2132UG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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