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Texas Instruments OPA2132UAG4
- Part No.:
- OPA2132UAG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2132UAG4.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,778
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Product details
Overview
OPA2132UAG4 from Texas Instruments is a dual-channel, FET-input operational amplifier optimized for high-impedance signal conditioning in precision data acquisition and audio systems. It delivers 8MHz gain-bandwidth, 20V/µs slew rate, 500µV max input offset voltage, 8nV/√Hz input voltage noise at 1kHz, and operates from ±2.5V to ±18V supplies. It serves as a SAR ADC driver and photodiode trans-impedance amplifier in industrial sensor front-ends.
For engineers reviewing the OPA2132UAG4 datasheet, OPA2132UAG4 pinout, OPA2132UAG4 application, or OPA2132UAG4 equivalent, this page provides verified specifications, SOIC-8 package layout guidance, real-world use cases for high-source-impedance circuits, and validated alternative options with documented functional trade-offs.
Technical Context
The OPA2132UAG4 uses JFET-input cascode architecture to maintain ultra-low input bias current (≤50pA) across its full common-mode range (–12.5V to +11.5V), eliminating phase reversal under overdrive. Its unity-gain-stable topology supports stable operation into ≥100pF capacitive loads without external compensation.
Each channel features independent circuitry-ensuring <0.2µV/V channel separation-and shares identical AC/DC specs with the single (OPA132) and quad (OPA4132) variants. Thermal design is supported by SOIC-8 RθJA = 160°C/W and RθJB = 60°C/W metrics, enabling reliable operation from –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 8MHz gain-bandwidth product: enables accurate amplification of signals up to ~1MHz in closed-loop G=10 configurations. |
| Slew Rate | 20V/µs: supports clean 10V step response in ≤0.7µs (0.1% settling), critical for fast-settling SAR ADC drivers. |
| Input Noise | 8nV/√Hz at 1kHz: ensures minimal added noise in low-level sensor interfaces like photodiode amplifiers. |
| Input Bias Current | ≤50pA max: avoids significant voltage error across >100MΩ source impedances, e.g., piezoelectric or pH sensors. |
| Offset Voltage | ±500µV max: reduces DC error in precision buffer and reference applications without trimming circuitry. |
| Supply Range | ±2.5V to ±18V: accommodates both low-power portable designs and high-voltage industrial signal chains. |
| Open-Loop Gain | 126dB (2kΩ load): provides >100dB loop gain at 10kHz, ensuring high closed-loop accuracy in active filters. |
Pinout & Package
OPA2132UAG4 is housed in an 8-pin SOIC (D) surface-mount package with exposed pad thermal performance matching TI's standard SOIC-8 footprint. Pin 1 is OUT A; Pin 2 is –IN A; Pin 3 is +IN A; Pin 4 is V–; Pin 5 is +IN B; Pin 6 is –IN B; Pin 7 is OUT B; Pin 8 is V+.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A (Pin 1) | Output, Channel A | Low-impedance buffered output capable of sourcing 36mA/sinking 30mA; drives 2kΩ loads to within 1.5V of rails. |
| –IN A (Pin 2) | Inverting Input, Channel A | Differential input node; matched impedance to +IN A; used for feedback in inverting configurations. |
| +IN A (Pin 3) | Noninverting Input, Channel A | High-impedance JFET input (1013Ω || 10pF); maintains ≤50pA bias current across full common-mode range. |
| V– (Pin 4) | Negative Power Supply | Reference for internal circuitry; must be ≤0.5V below lowest expected input voltage to avoid diode conduction. |
| +IN B (Pin 5) | Noninverting Input, Channel B | Independent high-Z input for second channel; no crosstalk with Channel A even under overload conditions. |
| –IN B (Pin 6) | Inverting Input, Channel B | Separate differential input for Channel B; enables dual-path signal processing without interaction. |
| OUT B (Pin 7) | Output, Channel B | Fully independent output stage; supports simultaneous operation with Channel A at full rated performance. |
| V+ (Pin 8) | Positive Power Supply | Highest supply rail; requires local 10nF ceramic bypass to ground for stable high-frequency operation. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal on common-mode overvoltage | Eliminates catastrophic output inversion in voltage-follower or high-gain configurations when inputs exceed rails. |
| Unity-gain stability with ≥100pF capacitive load | Enables direct driving of ADC input capacitors or long cables without external compensation networks. |
| Input cascode architecture | Maintains ≤50pA input bias current across –12.5V to +11.5V common-mode range, critical for precision integrators. |
| Independent dual-channel circuitry | Guarantees <0.2µV/V channel separation and zero interaction during overload, short-circuit, or saturation events. |
| Laser-trimmed input offset | Delivers ±500µV max VOS and ±10µV/°C drift over –40°C to +85°C, reducing need for system-level calibration. |
Applications
| SAR ADC Driver | Voltage Reference Buffer |
|---|---|
Use Scenario: Driving the switched-capacitor input of a 16-bit SAR ADC sampling at 1MSPS with 10V full-scale range. IC Role / Device Role / Timing Role: Precision unity-gain buffer that settles to 0.1% in <0.7µs while rejecting charge injection and maintaining linearity. Use Value: 8MHz bandwidth and 20V/µs slew rate ensure full-scale steps settle before next conversion cycle; low 8nV/√Hz noise preserves SNR. |
Use Scenario: Isolating and buffering a 2.5V bandgap reference in a multi-channel DAQ system with varying load currents. IC Role / Device Role / Timing Role: Low-output-impedance, high-PSRR buffer that rejects supply ripple and prevents reference loading errors. Use Value: 126dB open-loop gain and 100dB PSRR at DC minimize reference drift; ≤50pA bias current avoids loading high-impedance reference nodes. |
| Photodiode Amplifier | Active Filter |
Use Scenario: Converting picoamp-level photocurrent from a large-area photodiode into a low-noise voltage signal for optical sensing. IC Role / Device Role / Timing Role: Trans-impedance amplifier (TIA) with ultra-low input bias current and voltage noise to maximize dynamic range. Use Value: ≤50pA IB prevents dark-current error; 8nV/√Hz en dominates total noise floor, enabling sub-pA resolution at 1kHz. |
Use Scenario: Implementing a 30kHz 2nd-order low-pass filter in a vibration monitoring front-end with minimal passband peaking. IC Role / Device Role / Timing Role: High-slew-rate, unity-gain-stable op-amp configured as Sallen-Key topology with precise component ratios. Use Value: 8MHz GBW and 20V/µs SR suppress distortion at cutoff frequency; independent channels allow dual-filter paths in one package. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual FET-input operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2156IDR | Lower 3nV/√Hz noise, 25MHz GBW, rail-to-rail inputs; higher 6.5mA quiescent current per channel. | Better for wideband, low-noise applications (e.g., ultrasound receive paths); less suitable for ±18V high-voltage systems. | Select OPA2156IDR when noise bandwidth exceeds 10kHz and supply is ≤±15V; retain OPA2132UAG4 for high-voltage (>±15V) or ultra-low-IQ needs. |
| ADA4625-2ACPZ-R7 | 12.5MHz GBW, 22V/µs SR, 2.9nV/√Hz noise, 1pA max IB; specified only to +125°C, higher cost. | Superior for automotive-grade designs requiring extended temperature operation; tighter noise spec benefits low-light imaging. | Choose ADA4625-2ACPZ-R7 for AEC-Q200-compliant systems or where 1pA IB is mandatory; OPA2132UAG4 remains optimal for industrial cost-sensitive designs. |
Compared with OPA2156IDR and ADA4625-2ACPZ-R7, the OPA2132UAG4 offers the widest supply range (±18V), lowest quiescent current (±4.8mA total), and proven robustness in high-impedance industrial sensor interfaces-making it the preferred choice when voltage headroom and power efficiency outweigh ultra-low-noise requirements.
Availability
OPA2132UAG4 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, precision data acquisition systems, and high-fidelity audio front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2132UAG4 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 heritage in precision op-amps and signal chain solutions.
The OPA2132UAG4 belongs to TI's OPAx132 family of FET-input op-amps, designed specifically for high-source-impedance applications demanding low noise, low bias current, and excellent DC accuracy in industrial, test & measurement, and medical instrumentation.
FAQ
What is the maximum supply voltage for the OPA2132UAG4?
The OPA2132UAG4 supports a total supply voltage range of ±2.5V to ±18V, corresponding to a maximum differential supply of 36V. Absolute maximum ratings specify VS = 36V; exceeding this risks permanent damage. Operation at ±15V is production-tested and recommended for full specification compliance across –40°C to +85°C.
Does the OPA2132UAG4 require external compensation for unity-gain stability?
No, the OPA2132UAG4 is internally compensated for unity-gain stability and remains stable driving ≥100pF capacitive loads without external components. This is confirmed in the datasheet's "Detailed Description" section and validated in typical characteristics (Figure 5-16). External compensation is unnecessary for standard non-inverting or inverting configurations.
How does the OPA2132UAG4 prevent phase reversal during input overvoltage?
The OPA2132UAG4 uses input cascode circuitry that maintains low, stable input bias current across its full common-mode range (–12.5V to +11.5V), eliminating the phase-reversal behavior common in basic JFET-input op-amps. This architecture ensures predictable output polarity even when inputs exceed the supply rails by up to 0.5V, as stated in Section 7.1.1.
What is the thermal resistance (RθJA) of the OPA2132UAG4 in its SOIC-8 package?
The OPA2132UAG4 in the SOIC-8 (D) package has a junction-to-ambient thermal resistance (RθJA) of 160°C/W, as specified in Section 5.5 of the datasheet. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance improves with PCB copper area and airflow.
Can the OPA2132UAG4 drive high-capacitance loads such as ADC inputs directly?
Yes-the OPA2132UAG4 is characterized for stable operation into ≥100pF capacitive loads, making it suitable for direct connection to SAR ADC input capacitors. Its unity-gain stability and high slew rate (20V/µs) ensure fast settling without ringing or oscillation, as demonstrated in Figure 5-13 (small-signal step response) and Figure 5-16 (overshoot vs. load capacitance).
OPA2132UAG4 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:
- 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
OPA2132UAG4 FAQ
1.How can I place an order for OPA2132UAG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2132UAG4 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 OPA2132UAG4 reliable?
The price and inventory of OPA2132UAG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2132UAG4 is usually 5 days.
3.What payment methods are accepted for OPA2132UAG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2132UAG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2132UAG4?
OPA2132UAG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2132UAG4 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 OPA2132UAG4?
For technical support, including OPA2132UAG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2132UAG4 requirements.
6.How does Aetrix verify that OPA2132UAG4 is sourced from the original manufacturer or authorized distributors?
All OPA2132UAG4 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 OPA2132UAG4 meets industry standards.
7.What is the process for return or replacement of OPA2132UAG4?
All OPA2132UAG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2132UAG4, 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 OPA2132UAG4 part is unused and in its original packaging.
Return procedure for OPA2132UAG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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