My Inquiry
My Account
Texas Instruments OPA132UA/2K5E4
- Part No.:
- OPA132UA/2K5E4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA132UA/2K5E4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,634
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA132UA/2K5E4 from Texas Instruments is a single-channel, high-speed JFET-input operational amplifier designed for precision analog signal conditioning in high-impedance sensor interfaces and data acquisition systems. It delivers 8 MHz gain-bandwidth, ±20 V/µs slew rate, 8 nV/√Hz input voltage noise at 1 kHz, ±50 pA max input bias current, and operates from ±2.5 V to ±18 V supplies.
For engineers reviewing the OPA132UA/2K5E4 datasheet, OPA132UA/2K5E4 pinout, OPA132UA/2K5E4 application, or OPA132UA/2K5E4 equivalent, key selection considerations include its unity-gain stability, absence of phase inversion, low distortion (0.00008% THD+N), and offset trim capability - critical for high-resolution SAR ADC drivers and photodiode trans-impedance amplifiers.
Technical Context
The OPA132UA/2K5E4 employs a cascoded JFET input stage that maintains ultra-low input bias current (<50 pA) across its full ±13 V common-mode range and prevents phase reversal under overdrive. Its fully differential, high-slew-rate output stage supports fast settling (0.7 µs to 0.1%, 10 V step) into capacitive loads up to 100 pF without external compensation.
Internally compensated for unity-gain stability, it achieves 130 dB open-loop gain into 600 Ω, 96 dB CMRR, and ±500 µV max input offset voltage. The device features two offset trim pins (1 and 8) enabling laser-trimmed precision with manual nulling capability - a distinguishing feature absent in dual/quad variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 8 MHz - enables stable closed-loop operation up to 30 kHz in 2nd-order active filters without peaking. |
| Slew Rate | ±20 V/µs - supports 10 V step response settling in ≤1 µs at 0.01% error, suitable for fast data acquisition front-ends. |
| Input Voltage Noise | 8 nV/√Hz at 1 kHz - ensures minimal added noise in low-level signal amplification (e.g., piezoelectric sensors). |
| Input Bias Current | ±50 pA max at 25°C - preserves signal integrity in >1 GΩ source impedance applications like photodiode amps. |
| Common-Mode Range | ±13 V (with ±15 V supply) - allows rail-to-rail input operation in industrial ±12 V systems without attenuation. |
| Offset Voltage | ±500 µV max - enables sub-12-bit error budget in 16-bit SAR ADC driver configurations without trimming. |
| Supply Voltage Range | ±2.5 V to ±18 V - supports wide dynamic range in battery-powered and high-voltage industrial signal chains. |
Pinout & Package
OPA132UA/2K5E4 is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, optimized for surface-mount assembly and thermal performance in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Offset Trim | Input for offset voltage adjustment | Connects to potentiometer wiper for manual nulling; typical trim range ±4 mV - used only for op-amp offset correction, not system-level calibration. |
| 2 - –In | Inverting input | Differential input node; high-impedance JFET input with <50 pA bias current and 10¹³ Ω || 2 pF impedance. |
| 3 - +In | Noninverting input | Differential input node; identical impedance and bias characteristics as Pin 2; cascode design prevents phase reversal. |
| 4 - V– | Negative power supply | Accepts –2.5 V to –18 V; must be bypassed with ≥10 nF ceramic capacitor placed adjacent to pin for noise immunity. |
| 5 - NC | No internal connection | Unbonded die pad; electrically isolated - may be left floating or tied to ground for mechanical stability (no electrical effect). |
| 6 - Output | Amplifier output | Capable of ±2.5 V swing into 600 Ω load; drives ≥100 pF capacitive loads stably; short-circuit protected to ±40 mA. |
| 7 - V+ | Positive power supply | Accepts +2.5 V to +18 V; requires local 10 nF bypass to ground; PSRR of 90 dB minimizes supply ripple coupling. |
| 8 - Offset Trim | Input for offset voltage adjustment | Completes trim circuit with Pin 1; forms balanced bridge with internal resistors - essential for achieving <100 µV residual offset. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable architecture | Eliminates need for external compensation in voltage-follower or gain-of-1 configurations - reduces BOM count and layout sensitivity. |
| No phase inversion on common-mode overload | Prevents catastrophic control loop failure in voltage-reference buffers when input exceeds rails - verified across –40°C to 85°C. |
| Low distortion (0.00008% THD+N) | Enables high-fidelity audio pre-amplification and precision waveform generation without harmonic contamination. |
| Offset voltage trim pins (1 & 8) | Allows post-assembly calibration to <50 µV residual offset - critical for DC-coupled instrumentation where drift must be minimized. |
| High capacitive load drive (≥100 pF) | Permits direct connection to long traces, ADC input capacitance, or RC anti-aliasing filters without stability degradation. |
Applications
| Photodiode Amplifier | SAR ADC Driver |
|---|---|
Use Scenario: Amplifying weak current from a reverse-biased photodiode in optical smoke detection or spectrophotometry. IC Role / Device Role / Timing Role: Trans-impedance amplifier converting photocurrent to voltage with minimal added noise and bias-induced error. Use Value: 8 nV/√Hz noise and ±50 pA input bias enable detection of sub-picoamp currents; cascode input prevents saturation during ambient light transients. |
Use Scenario: Driving the switched-capacitor input of a 16-bit successive-approximation register (SAR) ADC in data loggers. IC Role / Device Role / Timing Role: Precision buffer isolating multiplexer output from ADC sampling kickback; settles within 1 µs to 0.01%. Use Value: ±20 V/µs slew rate and 8 MHz bandwidth ensure full-scale step settling before acquisition window closes - preserving ENOB. |
| Voltage Reference Buffer | Active Filter Stage |
Use Scenario: Isolating and buffering a precision bandgap reference (e.g., REF5025) in programmable logic controller (PLC) analog outputs. IC Role / Device Role / Timing Role: Unity-gain follower maintaining reference accuracy while sourcing load current and rejecting supply noise. Use Value: 130 dB open-loop gain and 96 dB CMRR suppress reference drift caused by digital switching noise on shared PCB planes. |
Use Scenario: Implementing a 2nd-order 30 kHz low-pass filter in medical ECG front-end signal conditioning. IC Role / Device Role / Timing Role: Active filter amplifier in Sallen-Key topology requiring low noise, low distortion, and stable phase margin. Use Value: Unity-gain stability and 8 MHz GBW allow clean 30 kHz cutoff with <3 dB peaking - validated in TI Precision Design TIPD182. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET-input operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA128SM | Lower input bias current (±25 pA max), higher cost, military-grade screening; no offset trim pins. | Better suited for ultra-high-impedance electrometer circuits (>10 GΩ), but lacks manual offset adjustment. | Select OPA128SM only when sub-25 pA bias is mandatory and offset trim is unnecessary. |
| ADA4625-1 | Higher slew rate (34 V/µs), lower noise (4.2 nV/√Hz), wider supply (±2.2 V to ±15 V); no offset trim. | Preferred for high-speed, low-noise applications like ultrasound receiver chains where bandwidth >10 MHz is required. | Choose ADA4625-1 when noise floor or speed outweighs need for manual offset calibration. |
Compared with OPA132UA/2K5E4, OPA128SM offers superior bias current but forfeits user-adjustable offset correction, while ADA4625-1 improves noise and speed at the expense of supply flexibility and trim capability - making OPA132UA/2K5E4 the optimal choice for calibrated, high-impedance DC-coupled systems.
Availability
OPA132UA/2K5E4 is available at Aetrix Electronics and suitable for precision data acquisition, industrial sensor interfacing, and medical signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA132UA/2K5E4 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-amp design and manufacturing excellence.
The OPAx132 product line was engineered specifically for high-source-impedance, low-distortion applications demanding both DC precision and AC fidelity - targeting instrumentation, test equipment, and high-end audio signal paths.
FAQ
What is the maximum capacitive load the OPA132UA/2K5E4 can drive while remaining stable?
The OPA132UA/2K5E4 is specified to drive ≥100 pF capacitive loads stably in unity-gain configuration without external compensation, as confirmed in Figure 17 of the SBOS054B datasheet. For loads exceeding 100 pF, a series resistor (typically 20–50 Ω) between the output and capacitance restores phase margin. This capability makes OPA132UA/2K5E4 suitable for direct interface with SAR ADC inputs and long PCB traces.
Does the OPA132UA/2K5E4 require external offset nulling in typical applications?
The OPA132UA/2K5E4 features factory laser-trimmed offset voltage (±500 µV max), so external nulling is not required for most applications. However, Pin 1 and Pin 8 provide offset trim capability for designs demanding <100 µV residual offset - such as 20-bit+ measurement systems. When used, a 10 kΩ potentiometer is recommended; improper adjustment can degrade drift performance.
Can the OPA132UA/2K5E4 operate from a single 5-V supply?
Yes - the OPA132UA/2K5E4 supports single-supply operation down to 5 V total (e.g., V+ = 5 V, V– = 0 V), per Absolute Maximum Ratings and Recommended Operating Conditions. Input common-mode range extends to within 1.2 V of each rail, and output swings to within 0.3 V of each rail under light load. For true rail-to-rail I/O, consider newer alternatives like OPA320.
How does the OPA132UA/2K5E4 prevent phase inversion during input overvoltage?
The OPA132UA/2K5E4 uses an input cascode circuit that maintains constant input bias current and avoids junction conduction even when the input common-mode voltage exceeds the supply rails by up to 0.7 V. This eliminates the phase-reversal behavior common in basic JFET op-amps, ensuring reliable operation in voltage-follower reference buffers and overvoltage-tolerant sensor interfaces.
What is the thermal resistance (θJA) of the OPA132UA/2K5E4 in SOIC-8 package?
The OPA132UA/2K5E4 in SOIC-8 (D) package has a typical junction-to-ambient thermal resistance (θJA) of 150°C/W under standard JEDEC test conditions (1s2p board). Actual θJA depends heavily on PCB copper area: adding 1-in² of 2-oz copper connected to V+ and V– pins via thermal vias can reduce θJA to ~60°C/W, critical for maintaining <50 pA bias current at elevated ambient temperatures.
OPA132UA/2K5E4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- 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
- 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:
- 8-SOIC
OPA132UA/2K5E4 FAQ
1.How can I place an order for OPA132UA/2K5E4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA132UA/2K5E4 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 OPA132UA/2K5E4 reliable?
The price and inventory of OPA132UA/2K5E4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA132UA/2K5E4 is usually 5 days.
3.What payment methods are accepted for OPA132UA/2K5E4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA132UA/2K5E4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA132UA/2K5E4?
OPA132UA/2K5E4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA132UA/2K5E4 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 OPA132UA/2K5E4?
For technical support, including OPA132UA/2K5E4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA132UA/2K5E4 requirements.
6.How does Aetrix verify that OPA132UA/2K5E4 is sourced from the original manufacturer or authorized distributors?
All OPA132UA/2K5E4 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 OPA132UA/2K5E4 meets industry standards.
7.What is the process for return or replacement of OPA132UA/2K5E4?
All OPA132UA/2K5E4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA132UA/2K5E4, 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 OPA132UA/2K5E4 part is unused and in its original packaging.
Return procedure for OPA132UA/2K5E4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA132UA/2K5E4 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
