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Texas Instruments OPA4132UA
- Part No.:
- OPA4132UA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4132UA.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:605
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Product details
Overview
OPA4132UA 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 operates from ±2.5V to ±18V supplies. It serves as a low-noise, low-bias-current buffer and driver in SAR ADC front-ends and photodiode transimpedance stages.
For engineers reviewing the OPA4132UA datasheet, OPA4132UA pinout, OPA4132UA application, or OPA4132UA equivalent, key selection considerations include its quad SOIC-14 package, unity-gain stability with ≥100pF capacitive load drive, channel separation >100dB at 1kHz, and verified performance across –40°C to +85°C industrial temperature range.
Technical Context
The OPA4132UA employs JFET-input cascode architecture to maintain <50pA input bias current over full common-mode range (–12.5V to +11.5V) while enabling high open-loop gain (120dB into 2kΩ) and excellent CMRR (94dB). Its internal compensation ensures stable unity-gain operation without external components.
Each of the four amplifiers features fully independent circuitry-no shared bias networks or substrate coupling-yielding >100dB channel separation up to 10kHz and immunity to crosstalk during overload or saturation events. Thermal design leverages SOIC-14's 97°C/W junction-to-ambient resistance for reliable operation at full rated supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 8MHz gain-bandwidth product - supports stable closed-loop gain ≥1 with ≤100ns settling to 0.01% for 10V steps. |
| Slew Rate | ±20V/µs - enables clean 3.5Vrms output at 1kHz with THD+N <0.0009% into 600Ω. |
| Input Noise | 8nV/√Hz at 1kHz - critical for preserving SNR in high-gain sensor interfaces like photodiode amps. |
| Input Bias Current | ±50pA max (25°C) - minimizes voltage error in MΩ-range source impedances (e.g., piezoelectric sensors). |
| Offset Voltage | ±2mV max (OPA4132UA grade) - laser-trimmed for dc-critical applications such as reference buffering. |
| Supply Range | ±2.5V to ±18V - supports dual-rail industrial signal chains without level-shifting circuitry. |
| Channel Count | Quad - integrates four matched, isolated op-amps in single SOIC-14 package to reduce board area and component count. |
Pinout & Package
OPA4132UA is housed in a 14-pin SOIC surface-mount package (Package Code D), with exposed pad not connected. Pin spacing is 1.27mm, body width 3.9mm, and maximum height 1.75mm - compatible with standard reflow profiles and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT A/B/C/D | Amplifier outputs - each drives ≥2kΩ load with ±13.5V swing (±15V supply); stable with ≥100pF capacitive loads. |
| 2, 6, 9, 13 | –IN A/B/C/D | Inverting inputs - high-impedance JFET nodes; require matched trace impedance in differential configurations. |
| 3, 5, 10, 12 | +IN A/B/C/D | Noninverting inputs - cascoded for constant IB across VCM; accept signals from –12.5V to +11.5V. |
| 4 | V+ | Positive power rail - must be bypassed with 10nF ceramic capacitor placed ≤2mm from pin. |
| 11 | V– | Negative power rail - separate ground return path recommended to minimize PSRR degradation. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal on common-mode overrange | Eliminates catastrophic output inversion in voltage-follower or high-gain configurations when input exceeds rails. |
| Independent amplifier cores | Prevents inter-channel interaction during overload, short-circuit, or saturation - critical for multi-channel data loggers. |
| Low distortion at high frequency | 0.0009% THD+N at 1kHz into 600Ω enables accurate audio and communication signal amplification. |
| High PSRR & CMRR | 94dB CMRR and 86dB PSRR (min) ensure stable dc accuracy despite noisy or unbalanced supplies. |
| Laser-trimmed offset & drift | ±2mV max offset and ±10µV/°C drift enable precision instrumentation without external nulling circuitry. |
Applications
| Photodiode Amplifier | SAR ADC Driver |
|---|---|
Use Scenario: Converting weak current from a reverse-biased photodiode into a stable, low-noise voltage signal for optical sensing. IC Role / Device Role / Timing Role: Trans-impedance amplifier with FET-input stage to avoid loading high-impedance photodiode node. Use Value: 8nV/√Hz noise and <50pA IB preserve signal integrity for sub-nA photocurrent detection at 1kHz bandwidth. |
Use Scenario: Driving the switched-capacitor input of a 16-bit SAR ADC requiring fast settling and minimal charge kickback. IC Role / Device Role / Timing Role: High-speed, low-distortion buffer isolating ADC input from upstream signal conditioning. Use Value: 0.7µs 0.1% settling time and ±20V/µs slew rate ensure full-scale transitions settle before next conversion cycle. |
| Voltage Reference Buffer | Active Filter Stage |
Use Scenario: Isolating a precision bandgap reference from varying load currents in multi-rail power management ICs. IC Role / Device Role / Timing Role: Unity-gain follower maintaining reference accuracy under dynamic load conditions. Use Value: ±2mV max offset and 120dB open-loop gain minimize reference voltage error across temperature and load. |
Use Scenario: Implementing a 2nd-order low-pass filter at 30kHz in a vibration monitoring front-end with anti-aliasing requirements. IC Role / Device Role / Timing Role: Active filter amplifier providing gain, pole placement, and drive capability for RC network. Use Value: 8MHz GBW and unity-gain stability allow precise filter response without peaking or oscillation. |
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 (1pA), but reduced bandwidth (3.8MHz) and slew rate (2V/µs). | Better for ultra-low-noise, low-frequency sensor interfaces; unsuitable for >100kHz signal paths or fast-settling ADC drivers. | Select OPA4141AIDR when dc precision and sub-pA bias dominate; retain OPA4132UA for bandwidth-critical designs. |
| ADA4891-4ARUZ | Rail-to-rail output, higher slew rate (225V/µs), wider bandwidth (105MHz), but higher noise (12nV/√Hz) and IB (2.5µA). | Optimized for high-speed, low-voltage (2.7–5.5V) applications; incompatible with ±15V industrial rails or high-impedance sources. | Choose ADA4891-4ARUZ only for single-supply, high-speed video or composite signal routing-not for precision analog front-ends. |
Compared with OPA4141AIDR and ADA4891-4ARUZ, the OPA4132UA uniquely balances 8MHz bandwidth, 8nV/√Hz noise, and <50pA input bias within a ±18V operating range-making it the only quad op-amp in this group suitable for industrial-grade, high-source-impedance, wide-supply applications without trade-offs in speed or precision.
Availability
OPA4132UA is available at Aetrix Electronics and suitable for industrial data acquisition, precision test equipment, and medical sensor signal conditioning requiring stable component supply across extended temperature and voltage ranges.
Supply support for OPA4132UA 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 delivering analog and embedded processing solutions, with leadership in precision amplifiers, data converters, and power management ICs.
The OPAx132 family was designed specifically for high-impedance, wide-bandwidth precision signal conditioning-targeting applications where FET input characteristics, low noise, and dc accuracy intersect, such as scientific instrumentation and industrial automation.
FAQ
What is the maximum capacitive load the OPA4132UA can drive while remaining stable?
The OPA4132UA is unity-gain stable and maintains stability with ≥100pF capacitive loads at the output, as confirmed by typical overshoot vs. load capacitance curves in the datasheet. For loads exceeding 100pF, series output resistance (e.g., 24Ω) is recommended to preserve phase margin. This capability makes the OPA4132UA suitable for driving ADC input capacitors and long PCB traces without external compensation.
Does the OPA4132UA exhibit phase reversal when the input common-mode voltage exceeds the supply rails?
No, the OPA4132UA does not exhibit phase reversal under common-mode overvoltage conditions. Its input cascode architecture prevents the output inversion commonly seen in basic JFET-input op-amps. This behavior is explicitly validated in the datasheet's Feature Description and Application Information sections, ensuring safe operation in voltage-follower configurations even when inputs exceed V– or V+ by up to 0.5V.
What is the guaranteed input offset voltage specification for the OPA4132UA grade?
The OPA4132UA grade guarantees a maximum input offset voltage of ±2mV at 25°C, per the Electrical Characteristics table (Section 5.7). This is distinct from the tighter ±0.5mV limit of the OPA4132U grade. The UA variant achieves this via laser trimming during final test, ensuring consistent dc performance across production lots without requiring external nulling circuitry.
Can the OPA4132UA operate from a single 30V supply instead of dual ±15V rails?
Yes, the OPA4132UA supports single-supply operation from 9V to 36V (as specified in Recommended Operating Conditions). When using a 30V single supply, connect V– to ground and bias input/output mid-rail (e.g., 15V) using resistive dividers or reference buffers. Input common-mode range extends from (V–)+2.5V to (V+)–3.5V, allowing full utilization of the 30V span with proper level-shifting.
How does channel separation perform in the OPA4132UA at high frequencies?
The OPA4132UA achieves >100dB channel separation up to 1kHz and maintains >80dB up to 10kHz, as shown in Figure 5-4 (Channel Separation vs Frequency). This performance results from fully independent amplifier cores with no shared bias or substrate paths-ensuring minimal crosstalk in multi-channel systems such as simultaneous-sampling data loggers or quad-channel active filters.
OPA4132UA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- OPAx132
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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 FAQ
1.How can I place an order for OPA4132UA through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4132UA 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 reliable?
The price and inventory of OPA4132UA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4132UA is usually 5 days.
3.What payment methods are accepted for OPA4132UA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4132UA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4132UA?
OPA4132UA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4132UA 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?
For technical support, including OPA4132UA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4132UA requirements.
6.How does Aetrix verify that OPA4132UA is sourced from the original manufacturer or authorized distributors?
All OPA4132UA 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 meets industry standards.
7.What is the process for return or replacement of OPA4132UA?
All OPA4132UA units undergo pre-shipment inspection (PSI). If there is an issue with OPA4132UA, 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 part is unused and in its original packaging.
Return procedure for OPA4132UA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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