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Texas Instruments OPA2132PAG4
- Part No.:
- OPA2132PAG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
OPA2132PAG4.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,725
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Product details
Overview
OPA2132PAG4 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 high-fidelity SAR ADC driver and photodiode amplifier applications.
For engineers reviewing the OPA2132PAG4 datasheet, OPA2132PAG4 pinout, OPA2132PAG4 application, or OPA2132PAG4 equivalent, key selection criteria include its JFET-input architecture with 50pA max input bias current, unity-gain stability, low THD+N (0.00008%), and independence between channels for low crosstalk in dual-amplifier configurations.
Technical Context
The OPA2132PAG4 uses a cascoded JFET input stage to maintain ultra-low input bias current across its full common-mode range (–12.5V to +11.5V), eliminating phase reversal under overdrive - a known failure mode in legacy FET op-amps. Its internal compensation ensures stable unity-gain operation even with ≥100pF capacitive loads.
Each amplifier channel features fully independent circuitry, delivering >120dB channel separation up to 10kHz and no interaction during overload or short-circuit events. The device achieves 0.1% settling in 1µs for a 10V step, supporting fast-settling precision measurement front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 8MHz - supports stable closed-loop gain ≥1 with bandwidth sufficient for 30kHz anti-aliasing filters. |
| Slew Rate | 20V/µs - enables full-scale output transitions in <1µs without slewing distortion in 10V-range signals. |
| Input Voltage Noise | 8nV/√Hz at 1kHz - preserves SNR in low-level sensor interfaces like photodiode transimpedance amplifiers. |
| Input Bias Current | 50pA max - introduces <0.5µV error in 10MΩ source impedance, critical for high-Z voltage reference buffers. |
| Open-Loop Gain | 126dB (2kΩ load) - ensures <1ppm gain error in precision instrumentation amplifier topologies. |
| Supply Range | ±2.5V to ±18V - accommodates industrial ±15V rails and low-voltage portable designs without performance loss. |
| THD+N | 0.00008% at 1kHz - meets audio-grade linearity requirements in active filter and signal reconstruction circuits. |
Pinout & Package
OPA2132PAG4 is housed in an 8-pin PDIP (Plastic Dual In-line Package) with 0.3-inch body width, rated for –40°C to +85°C ambient operation. Thermal resistance RθJA = 71°C/W enables reliable operation at ≤4.8mA quiescent current per amplifier under natural convection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A (Pin 1) | Output | Amplifier A output node; drives loads up to 600Ω while maintaining rail-to-rail swing capability. |
| –IN A (Pin 2) | Input | Inverting input for Channel A; high-impedance JFET node with 1013Ω || 7pF input impedance. |
| +IN A (Pin 3) | Input | Noninverting input for Channel A; cascoded to reject common-mode shifts and prevent phase inversion. |
| V– (Pin 4) | Power | Negative supply rail connection; must be bypassed with 10nF ceramic capacitor placed <2mm from pin. |
| +IN B (Pin 5) | Input | Noninverting input for Channel B; electrically isolated from Channel A to ensure <0.2µV/V crosstalk. |
| –IN B (Pin 6) | Input | Inverting input for Channel B; identical DC and AC specs to Channel A for matched dual-channel designs. |
| OUT B (Pin 7) | Output | Amplifier B output node; fully independent - remains functional even if Channel A is shorted or overloaded. |
| V+ (Pin 8) | Power | Positive supply rail connection; shares same bypassing requirement as V– for PSRR >96dB. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal on common-mode overvoltage | Eliminates catastrophic output polarity flip in voltage-follower configurations when input exceeds rails. |
| Unity-gain stable with ≥100pF capacitive load | Enables direct driving of ADC input capacitance or long cables without external compensation. |
| Channel independence in dual configuration | Prevents mutual interference during overload, short-circuit, or saturation - critical for fault-tolerant designs. |
| Laser-trimmed input offset voltage | Guarantees ≤500µV max offset and ≤10µV/°C drift, reducing calibration burden in temperature-varying environments. |
| High PSRR and CMRR (>96dB) | Maintains accuracy in noisy industrial power domains and rejects ground-bounce errors in mixed-signal PCBs. |
Applications
| SAR ADC Driver | Voltage Reference Buffer |
|---|---|
Use Scenario: Driving the switched-capacitor input of a 16-bit successive-approximation ADC requiring sub-LSB settling within 1µs. IC Role / Device Role / Timing Role: Precision buffer isolating reference voltage from dynamic ADC load; provides 20V/µs slew rate to settle 10V steps in <1µs. Use Value: Prevents missing codes by eliminating reference droop during acquisition, ensuring monotonicity and integral nonlinearity <±1 LSB. | Use Scenario: Stabilizing a precision bandgap or buried-zener voltage reference against varying load currents in metrology equipment. IC Role / Device Role / Timing Role: Low-output-impedance follower with <500µV offset and 50pA bias current to avoid loading-induced drift. Use Value: Maintains reference accuracy to ±2ppm over temperature and time, directly improving system absolute accuracy. |
| Trans-Impedance Amplifier | Photodiode Amplifier |
Use Scenario: Converting nanoampere photocurrent from a scientific-grade photodiode into a measurable voltage signal. IC Role / Device Role / Timing Role: High-gain, low-noise TIA with 8nV/√Hz voltage noise and 3fA/√Hz current noise at 1kHz. Use Value: Enables detection of <10nA signals with >80dB dynamic range, preserving resolution in low-light spectroscopy. | Use Scenario: Amplifying weak current from a reverse-biased photodiode in optical smoke detectors or medical pulse oximeters. IC Role / Device Role / Timing Role: Low-bias-current, low-distortion amplifier operating from single +5V or dual ±15V supplies. Use Value: Delivers 0.00008% THD+N for clean analog output, minimizing false alarms caused by harmonic artifacts. |
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 voltage noise (3nV/√Hz), wider GBW (25MHz), rail-to-rail inputs; requires higher supply current (6.5mA/ch). | Better for wideband, low-noise applications (e.g., ultrasound receivers); not drop-in due to different input stage and pinout. | Select OPA2156IDR only when broadband noise or input voltage range is prioritized over quiescent power and legacy compatibility. |
| AD823ARZ | Higher input bias current (1pA typ vs 50pA max), lower GBW (16MHz), no guaranteed phase-reversal immunity. | Suitable for general-purpose dual op-amp use but lacks OPA2132PAG4's robustness in high-Z, overvoltage-prone sensor interfaces. | Choose AD823ARZ for cost-sensitive industrial controls where input protection and ultra-low bias current are secondary. |
Compared with OPA2132PAG4, OPA2156IDR trades lower noise and higher speed for increased power and non-pin-compatible layout, while AD823ARZ offers higher bandwidth at the expense of guaranteed phase-reversal immunity and input bias current performance - making OPA2132PAG4 the optimal choice for legacy-robust, high-impedance precision buffering.
Availability
OPA2132PAG4 is available at Aetrix Electronics and suitable for SAR ADC driver, voltage reference buffer, trans-impedance amplifier, and photodiode amplifier applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2132PAG4 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 leadership in precision amplifiers, data converters, and power management ICs.
The OPAx132 product line was designed specifically for high-source-impedance precision signal conditioning - targeting data acquisition, test equipment, and industrial sensing where FET-input performance, dc accuracy, and reliability under overvoltage stress are essential.
FAQ
What is the maximum supply voltage rating for OPA2132PAG4?
The OPA2132PAG4 has an absolute maximum supply voltage rating of ±18V (36V total), with recommended operating range from ±2.5V to ±18V. Exceeding ±18V risks permanent damage per Section 5.1 of the SBOS054C datasheet. Operation at ±15V is production-tested and delivers full specified performance including 126dB open-loop gain and 20V/µs slew rate.
Does OPA2132PAG4 require external compensation for unity-gain stability?
No, OPA2132PAG4 is internally compensated and unity-gain stable across its full operating range. It maintains stability with capacitive loads up to 100pF without external components, as verified in Figure 5-16 and Section 6.3. This eliminates design risk in ADC driver and active filter applications where output capacitance is unavoidable.
How does OPA2132PAG4 prevent phase reversal during input overvoltage?
OPA2132PAG4 uses input cascode circuitry that maintains low input bias current and prevents output polarity inversion when the input common-mode voltage exceeds the supply rails - a failure mode common in basic JFET op-amps. This behavior is confirmed in Section 7.1.1 and Figure 5-6, ensuring safe operation in voltage-follower configurations with high-impedance sources.
What is the thermal resistance (RθJA) of OPA2132PAG4 in its PDIP package?
The OPA2132PAG4 in the 8-pin PDIP package has a junction-to-ambient thermal resistance (RθJA) of 71°C/W, per Section 5.5. This value assumes standard JEDEC 2S2P board conditions. At 4.8mA per amplifier (9.6mA total), the worst-case junction temperature rise is ~68°C above ambient - well within the 125°C max TJ limit for continuous operation at 85°C ambient.
Can OPA2132PAG4 drive heavy capacitive loads such as ADC inputs?
Yes, OPA2132PAG4 is characterized to drive ≥100pF capacitive loads stably in unity-gain configuration, as shown in Figure 5-16 and Section 7.1. Its internal compensation and high slew rate (20V/µs) prevent ringing or oscillation when interfacing directly with typical 10–30pF ADC sample-and-hold inputs, even with PCB trace capacitance included.
OPA2132PAG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- OPAx132
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
OPA2132PAG4 FAQ
1.How can I place an order for OPA2132PAG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2132PAG4 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 OPA2132PAG4 reliable?
The price and inventory of OPA2132PAG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2132PAG4 is usually 5 days.
3.What payment methods are accepted for OPA2132PAG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2132PAG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2132PAG4?
OPA2132PAG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2132PAG4 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 OPA2132PAG4?
For technical support, including OPA2132PAG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2132PAG4 requirements.
6.How does Aetrix verify that OPA2132PAG4 is sourced from the original manufacturer or authorized distributors?
All OPA2132PAG4 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 OPA2132PAG4 meets industry standards.
7.What is the process for return or replacement of OPA2132PAG4?
All OPA2132PAG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2132PAG4, 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 OPA2132PAG4 part is unused and in its original packaging.
Return procedure for OPA2132PAG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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