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Texas Instruments OPA4132UA/2K5
- Part No.:
- OPA4132UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4132UA/2K5.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,652
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Product details
Overview
OPA4132UA/2K5 from Texas Instruments is a quad-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 ±2.5V to ±18V dual-supply operation - enabling accurate buffering of photodiode, SAR ADC reference, and trans-impedance amplifier outputs.
For engineers reviewing the OPA4132UA/2K5 datasheet, OPA4132UA/2K5 pinout, OPA4132UA/2K5 application, or OPA4132UA/2K5 equivalent, key selection criteria include its quad-channel independence, unity-gain stability with ≥100pF capacitive load drive, low 50pA max input bias current over –40°C to +85°C, and SOIC-14 package compatibility with high-density analog layouts.
Technical Context
The OPA4132UA/2K5 implements a JFET-input cascode front-end that maintains <50pA input bias current across its full ±13V common-mode range while delivering 126dB open-loop gain into 2kΩ loads. Its fully independent amplifier cores eliminate crosstalk - critical for multi-channel sensor interfaces where one channel may be overdriven without affecting others.
It operates stably at unity gain with no external compensation required, supports rail-to-rail output swing within 1.2V of supplies (at 10kΩ), and exhibits negligible phase reversal - a known failure mode in legacy FET op-amps - even when inputs exceed common-mode limits. Thermal design is aided by RθJA = 97°C/W in SOIC-14.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 8MHz gain-bandwidth product - enables stable closed-loop operation up to 30kHz in 2nd-order active filters without peaking. |
| Slew Rate | 20V/µs - ensures ≤1µs 0.01% settling for 10V steps, supporting fast SAR ADC driver timing. |
| Input Noise | 8nV/√Hz at 1kHz - preserves SNR in low-level photodiode and bridge sensor amplification. |
| Input Bias Current | 50pA maximum - minimizes voltage error in >100MΩ source impedance applications like piezoelectric sensors. |
| Offset Voltage | ±500µV maximum - reduces DC error in precision voltage reference buffers without trimming. |
| Supply Range | ±2.5V to ±18V - supports industrial 24V systems and battery-powered instrumentation with headroom. |
| Channel Separation | ≥120dB at 1kHz - prevents signal coupling between channels in quad-configured data loggers. |
Pinout & Package
OPA4132UA/2K5 is housed in a 14-pin SOIC (D) surface-mount package, 8.65mm × 3.91mm footprint, 1.75mm height, with exposed pad not connected. Pin 1 is OUT A; pins 2–14 follow TI-standard quad op-amp layout with dedicated power (V+, V−), four fully isolated amplifier sections (A–D), and no shared internal nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | Output A/B/C/D | Independent buffered outputs - each drives ≥2kΩ load with <0.00008% THD+N at 1kHz. |
| 2, 6, 9, 13 | Inverting Input A/B/C/D | FET-input terminals - bias current ≤50pA enables high-Z feedback networks without drift. |
| 3, 5, 10, 12 | Noninverting Input A/B/C/D | Matched to inverting inputs - supports precision differential, instrumentation, and integrator topologies. |
| 4 | V+ | Positive supply rail - accepts up to +18V; bypass with 10nF ceramic capacitor placed <2mm from pin. |
| 11 | V− | Negative supply rail - accepts down to –18V; requires separate local bypass for optimal PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Eliminates catastrophic output inversion during input overvoltage - critical for closed-loop control and voltage-follower reference buffers. |
| Unity-gain stable | Operates without external compensation at G = 1, even with ≥100pF capacitive loads - simplifies PCB layout for ADC drivers. |
| Low thermal drift | ±10µV/°C max offset drift - maintains calibration integrity across –40°C to +85°C industrial temperature range. |
| High CMRR | 94dB min at 25°C - rejects interference in single-ended sensor interfaces referenced to noisy system grounds. |
| Independent channels | No crosstalk between amplifiers - enables simultaneous sampling of four sensors without inter-channel contamination. |
Applications
| Photodiode Amplifier | SAR ADC Driver |
|---|---|
Use Scenario: Converting weak current from a 1cm² silicon photodiode (100pA–10nA range) into a stable voltage for digitization. IC Role / Device Role / Timing Role: Trans-impedance amplifier with 10MΩ feedback resistor and 8MHz bandwidth to preserve pulse fidelity. Use Value: 50pA max input bias current avoids saturation; 8nV/√Hz noise ensures >80dB SNR at 1kHz. |
Use Scenario: Driving the switched-capacitor input of a 16-bit SAR ADC (e.g., ADS8860) requiring fast settling and low distortion. IC Role / Device Role / Timing Role: Unity-gain buffer with 20V/µs slew rate to settle 10V step within 1µs to 0.01%. Use Value: 0.00008% THD+N and 126dB open-loop gain minimize code-dependent nonlinearity errors. |
| Voltage Reference Buffer | Active Filter |
Use Scenario: Isolating and distributing a precision 2.5V bandgap reference (e.g., REF5025) to multiple ADCs and DACs. IC Role / Device Role / Timing Role: Low-offset, low-drift unity-gain follower with <500µV error and <10µV/°C drift. Use Value: Laser-trimmed offset and 94dB CMRR prevent ground-loop-induced reference corruption. |
Use Scenario: Implementing a 30kHz 2nd-order low-pass filter in a vibration monitoring front-end before sigma-delta conversion. IC Role / Device Role / Timing Role: Dual-amplifier Sallen-Key topology with 8MHz GBW ensuring flat passband and controlled roll-off. Use Value: Unity-gain stability and 120dB channel separation prevent filter stage interaction in multi-pole designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad FET-input operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4141AIDR | Lower noise (6.5nV/√Hz), lower IB (10pA), but narrower 3.8MHz GBW and slower 12V/µs slew rate. | Better for ultra-low-noise DC-coupled sensor amps; unsuitable for >15kHz signal paths or fast-settling ADC drivers. | Select OPA4141AIDR only when noise dominates over speed; retain OPA4132UA/2K5 for mixed-signal timing-critical roles. |
| ADA4891-4ARUZ | Rail-to-rail output, higher 225MHz GBW, but bipolar input (2.8µA IB) and higher 10nV/√Hz noise. | Preferred for single-supply, wideband video or communication circuits; incompatible with high-Z photodiode or piezo sources. | Choose ADA4891-4ARUZ for 3.3V/5V systems needing RRO; avoid for >1MΩ source impedances due to input current error. |
Compared with OPA4141AIDR and ADA4891-4ARUZ, the OPA4132UA/2K5 uniquely balances 8MHz bandwidth, 50pA input bias, and 8nV/√Hz noise - making it the only quad op-amp in this group suitable for simultaneous high-impedance sensing and moderate-speed data acquisition without trade-offs.
Availability
OPA4132UA/2K5 is available at Aetrix Electronics and suitable for industrial sensor interfaces, medical instrumentation signal chains, and test equipment analog front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA4132UA/2K5 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 over 50 years of op-amp innovation and broad manufacturing scale.
The OPAx132 family was designed specifically for precision, high-impedance analog signal conditioning - targeting applications where FET input performance, dc accuracy, and ac speed must coexist without compromise.
FAQ
What is the maximum capacitive load the OPA4132UA/2K5 can drive while remaining stable?
The OPA4132UA/2K5 is unity-gain stable and supports capacitive loads up to 100pF without external compensation, as verified in Figure 5-16 and 5-17 of the datasheet. For loads exceeding 100pF, a series resistor (e.g., 24Ω–51Ω) at the output is recommended to maintain phase margin. This capability makes OPA4132UA/2K5 suitable for driving ADC input capacitance and long PCB traces in data acquisition systems.
Does the OPA4132UA/2K5 require input offset voltage trimming in circuit?
No, the OPA4132UA/2K5 uses laser trimming to achieve ≤±500µV input offset voltage at 25°C and ≤±10µV/°C drift over –40°C to +85°C, eliminating the need for external nulling circuitry. This specification is production-tested and guaranteed - confirmed in Section 5.7 of the SBOS054C datasheet - allowing direct use in precision reference buffers and sensor interfaces without calibration overhead.
How does the OPA4132UA/2K5 prevent phase reversal during input overvoltage?
The OPA4132UA/2K5 incorporates input cascode circuitry that maintains FET gate control across the full common-mode range (V− +2.5V to V+ −3.5V), preventing the input stage from saturating and inverting output polarity - a failure mode common in basic JFET op-amps. This behavior is explicitly validated in Section 7.1.1 and eliminates risk in voltage-follower configurations used with unclamped sensors or mismatched supply rails.
What is the quiescent current per amplifier for the OPA4132UA/2K5?
The OPA4132UA/2K5 draws ±4.0mA to ±4.8mA quiescent current per amplifier at 25°C with zero output load, as specified in Section 5.7 Electrical Characteristics. Total device supply current is therefore 16–19.2mA for all four channels - a value stable across temperature (see Figure 5-8) and compatible with thermally constrained industrial modules using the SOIC-14 package.
Can the OPA4132UA/2K5 operate on a single 5V supply?
Yes, the OPA4132UA/2K5 supports single-supply operation from 9V to 36V (Section 5.3), meaning a 5V rail is below its minimum requirement. The absolute minimum total supply voltage is 5V (±2.5V), so a true 5V single supply is insufficient. Valid single-supply configurations start at 9V (e.g., 0V to +9V), with output swing limited to ~0.3V above V− and ~1.5V below V+ under 2kΩ load - as detailed in Section 5.7 Output specifications.
OPA4132UA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- OPAx132
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 4
- 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 (x4 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 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
OPA4132UA/2K5 FAQ
1.How can I place an order for OPA4132UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4132UA/2K5 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 OPA4132UA/2K5 reliable?
The price and inventory of OPA4132UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4132UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA4132UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4132UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4132UA/2K5?
OPA4132UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4132UA/2K5 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 OPA4132UA/2K5?
For technical support, including OPA4132UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4132UA/2K5 requirements.
6.How does Aetrix verify that OPA4132UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA4132UA/2K5 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 OPA4132UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA4132UA/2K5?
All OPA4132UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4132UA/2K5, 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 OPA4132UA/2K5 part is unused and in its original packaging.
Return procedure for OPA4132UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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