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Texas Instruments OPA4132UAG4
- Part No.:
- OPA4132UAG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4132UAG4.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,900
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Product details
Overview
OPA4132UAG4 from Texas Instruments is a quad-channel, FET-input operational amplifier optimized for high-precision, high-source-impedance signal conditioning. 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 amplifier in data-acquisition front-ends.
For engineers reviewing the OPA4132UAG4 datasheet, OPA4132UAG4 pinout, OPA4132UAG4 application, or OPA4132UAG4 equivalent, key selection criteria include its quad-channel SOIC-14 packaging, unity-gain stability, 50pA max input bias current, rail-compatible common-mode range, and proven performance in photodiode and SAR ADC driver circuits.
Technical Context
The OPA4132UAG4 employs JFET-input cascode architecture to maintain ultra-low input bias current (<50pA) across its full ±13V common-mode input range while rejecting supply and common-mode disturbances. Its fully independent amplifier channels eliminate crosstalk-critical for multi-channel instrumentation where channel separation exceeds 120dB at 1kHz.
It achieves fast settling (≤1µs to 0.01%) via high slew rate and wide bandwidth, and remains stable driving ≥100pF capacitive loads without external compensation-enabling direct connection to ADC inputs, reference buffers, and active filter nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 8MHz gain bandwidth product-supports accurate amplification of signals up to ~1MHz in closed-loop G=10 configurations. |
| Slew Rate | ±20V/µs-enables clean reproduction of fast 10V step signals with <1µs 0.01% settling time. |
| Input Noise | 8nV/√Hz at 1kHz-minimizes added noise in precision sensor interfaces and photodiode transimpedance stages. |
| Input Bias Current | ≤50pA max-prevents significant voltage error across >100MΩ source impedances (e.g., piezoelectric sensors). |
| Offset Voltage | ≤500µV max-reduces initial DC error in precision gain stages and reference buffers without trimming. |
| Supply Range | ±2.5V to ±18V-supports operation from low-power portable systems to industrial ±15V rails. |
| Open-Loop Gain | 126dB into 2kΩ-ensures <0.001% gain error in unity-gain buffer applications with typical loads. |
Pinout & Package
OPA4132UAG4 is housed in a 14-pin SOIC (D package) surface-mount package with exposed pad thermal enhancement per TI's mechanical drawing SLMA011. Pin numbering follows standard SOIC top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT A–D | Independent analog outputs-each capable of sourcing 36mA/sinking 30mA into 2kΩ loads. |
| 2, 6, 9, 13 | –IN A–D | Inverting inputs-high-impedance JFET nodes with matched bias current for differential configurations. |
| 3, 5, 10, 12 | +IN A–D | Noninverting inputs-cascode-protected to prevent phase reversal beyond common-mode limits. |
| 4 | V+ | Positive power supply-must be bypassed with 10nF ceramic capacitor placed within 2mm of pin. |
| 11 | V– | Negative power supply-requires symmetric bypassing; shared rail for all four amplifiers. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable | Operates reliably at G = 1 without external compensation-simplifies design of buffers and followers. |
| No phase inversion | Input cascode prevents output polarity reversal when common-mode voltage exceeds rails-eliminates latch-up risk in feedback loops. |
| High channel isolation | ≥120dB channel separation at 1kHz-preserves signal integrity in simultaneous multi-channel acquisition. |
| Low distortion | 0.00008% THD+N at 1kHz-maintains fidelity in audio and high-resolution measurement paths. |
| Wide common-mode range | (V–)+2.5V to (V+)-3.5V-accepts input signals near supply rails without clipping or error. |
Applications
| SAR ADC Driver | Voltage Reference Buffer |
|---|---|
Use Scenario: Driving the switched-capacitor input of a 16-bit successive-approximation ADC requiring fast settling and minimal charge kickback. IC Role / Device Role / Timing Role: Precision unity-gain buffer with 0.01% settling in <1µs, isolating reference from dynamic ADC load. Use Value: Enables full 16-bit accuracy by eliminating code-dependent errors caused by reference droop during conversion. | Use Scenario: Stabilizing and distributing a precision voltage reference (e.g., REF5025) to multiple analog subsystems. IC Role / Device Role / Timing Role: Low-drift, low-noise buffer maintaining reference integrity under varying load currents. Use Value: Prevents reference loading-induced drift and noise coupling-critical for multi-channel DAC/ADC systems. |
| Photodiode Amplifier | Active Filter |
Use Scenario: Converting weak current from a reverse-biased photodiode into a stable voltage signal in optical sensing. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias current (<50pA) and low input capacitance. Use Value: Maximizes signal-to-noise ratio by minimizing dark current error and Johnson noise contribution. | Use Scenario: Implementing a 2nd-order low-pass filter (e.g., 30kHz cutoff) in sensor signal conditioning or anti-aliasing paths. IC Role / Device Role / Timing Role: High-linearity, low-distortion op-amp enabling precise frequency response control. Use Value: Delivers flat passband and sharp roll-off without peaking-verified in TI's 30kHz filter reference design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4182 | Lower offset (±4µV), lower noise (5.5nV/√Hz), rail-to-rail output; requires higher quiescent current (1.2mA/ch vs 4.4mA/ch). | Better for ultra-low-offset DC-critical systems; less suitable for high-voltage ±18V operation. | Select OPA4182 when sub-10µV offset and RRO are mandatory; retain OPA4132UAG4 for ±18V compatibility and legacy layout reuse. |
| AD8628ARUZ | Zero-drift architecture; 1µV max offset, 0.01µV/°C drift; bandwidth limited to 2.5MHz; not unity-gain stable with capacitive loads >100pF. | Ideal for DC-stable integrators and zero-drift sensor front-ends; unsuitable for high-speed settling or capacitive drive. | Choose AD8628ARUZ for microvolt-level DC accuracy over temperature; choose OPA4132UAG4 for bandwidth + capacitive load robustness. |
Compared with OPA4182 and AD8628ARUZ, the OPA4132UAG4 uniquely balances 8MHz bandwidth, ±18V operation, unity-gain stability into 100pF, and 50pA input bias-making it optimal for high-impedance, wide-dynamic-range industrial signal chains where both speed and precision matter.
Availability
OPA4132UAG4 is available at Aetrix Electronics and suitable for industrial data acquisition, precision instrumentation, and optical sensor interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA4132UAG4 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 for industrial, automotive, and communications markets.
The OPAx132 series was designed specifically for high-precision, high-source-impedance applications-including photodiode amplification, reference buffering, and SAR ADC driving-where low bias current, low noise, and wide bandwidth must coexist.
FAQ
What is the maximum supply voltage for the OPA4132UAG4?
The OPA4132UAG4 supports a total supply voltage range of ±2.5V to ±18V, corresponding to a maximum differential supply voltage of 36V. Absolute maximum ratings specify VS = (V+) – (V–) ≤ 36V; exceeding this risks permanent damage. Operation at ±15V is production-tested and recommended for full specification compliance.
Does the OPA4132UAG4 require external compensation for unity-gain stability?
No, the OPA4132UAG4 is internally compensated and unity-gain stable. It drives resistive and capacitive loads up to 100pF without oscillation or peaking, as verified in TI's typical characteristics (Figure 5-16). This eliminates the need for external compensation networks in buffer and follower configurations.
How does the OPA4132UAG4 handle input common-mode voltage beyond the rails?
The OPA4132UAG4 uses input cascode circuitry that prevents phase inversion when the input common-mode voltage exceeds the supply rails-unlike many FET-input op-amps. Its specified common-mode range is (V–)+2.5V to (V+)-3.5V, and it remains functional without output polarity reversal even outside this range, enhancing reliability in overvoltage-prone sensor interfaces.
What is the thermal resistance (RθJA) of the OPA4132UAG4 in its SOIC-14 package?
The OPA4132UAG4 in the 14-pin SOIC (D) package has a junction-to-ambient thermal resistance (RθJA) of 97°C/W, as documented in Section 5.6 of the datasheet. This value assumes standard JEDEC 2S2P test board conditions; actual board-level thermal performance depends on copper area, layer count, and airflow.
Can the OPA4132UAG4 drive high-capacitance loads such as ADC inputs directly?
Yes-the OPA4132UAG4 is characterized to drive ≥100pF capacitive loads stably in unity-gain configuration, making it suitable for direct connection to switched-capacitor ADC inputs. Its high slew rate (±20V/µs) and low output impedance ensure fast settling (<1µs to 0.01%) without external isolation resistors in most SAR ADC driver applications.
OPA4132UAG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- OPAx132
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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
OPA4132UAG4 FAQ
1.How can I place an order for OPA4132UAG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4132UAG4 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 OPA4132UAG4 reliable?
The price and inventory of OPA4132UAG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4132UAG4 is usually 5 days.
3.What payment methods are accepted for OPA4132UAG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4132UAG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4132UAG4?
OPA4132UAG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4132UAG4 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 OPA4132UAG4?
For technical support, including OPA4132UAG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4132UAG4 requirements.
6.How does Aetrix verify that OPA4132UAG4 is sourced from the original manufacturer or authorized distributors?
All OPA4132UAG4 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 OPA4132UAG4 meets industry standards.
7.What is the process for return or replacement of OPA4132UAG4?
All OPA4132UAG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4132UAG4, 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 OPA4132UAG4 part is unused and in its original packaging.
Return procedure for OPA4132UAG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4132UAG4 Tags
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