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Texas Instruments OPA336NJ/3K
- Part No.:
- OPA336NJ/3K
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA336NJ/3K.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,487
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Product details
Overview
OPA336NJ/3K from Texas Instruments is a single-channel, rail-to-rail output, microPower CMOS operational amplifier designed for ultra-low-power, single-supply battery-operated systems. It delivers 20µA quiescent current per amplifier, 125µV max input offset voltage, and rail-to-rail output swing within 3mV of supply rails under 100kΩ load - enabling precision signal conditioning in portable medical instruments and photodiode pre-amplifiers.
For engineers reviewing the OPA336NJ/3K datasheet, OPA336NJ/3K pinout, OPA336NJ/3K application, or OPA336NJ/3K equivalent, this page provides verified electrical specifications, SOT23-5 package terminal mapping, real-world use cases in high-impedance sensing, and validated alternative options for low-voltage, low-IQ analog front-ends.
Technical Context
The OPA336NJ/3K employs a CMOS input stage with 1pA typical input bias current and operates from 2.3V to 5.5V single supply, supporting common-mode input down to V– – 0.2V. Its unity-gain stable architecture achieves 100kHz gain-bandwidth product and 0.03V/µs slew rate, optimized for DC-coupled, low-frequency precision amplification.
It features internal ESD protection (CDM 1000V), rail-to-rail output stage capable of sourcing/sinking ±5mA, and thermal shutdown-free operation across –40°C to +85°C. The device avoids phase inversion when inputs exceed supply rails - a critical reliability feature for sensor interfaces with transient overvoltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.3V to 5.5V - enables direct operation from single Li-ion cell or two alkaline cells without regulation. |
| Quiescent Current | 20µA per amplifier - extends battery life in always-on portable instrumentation beyond 10 years on CR2032. |
| Input Offset Voltage | 125µV max - ensures ≤0.0025% gain error in 5V full-scale 16-bit ADC front-ends. |
| Output Swing | Within 3mV of rails (100kΩ load) - preserves dynamic range in low-voltage signal chains. |
| Input Bias Current | 1pA typical - supports >1GΩ source impedances in photodiode and pH electrode applications. |
| Gain-Bandwidth Product | 100kHz - sufficient for anti-aliasing, sensor filtering, and precision integrator loops up to 10kHz. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and portable medical equipment environments. |
Pinout & Package
OPA336NJ/3K is housed in a 5-pin SOT23-5 surface-mount package (DBV drawing), with pin 1 marked by a dot. Thermal resistance θJA = 200°C/W enables operation at full spec without heatsinking in compact PCB layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V– (Negative Supply) | Ground reference for single-supply operation; common-mode range extends to this pin minus 0.2V. |
| 2 | –In (Inverting Input) | Differential input node; 1pA bias current minimizes voltage drop across high-Z sources. |
| 3 | Out (Output) | Rail-to-rail output capable of 3mV swing to V+ or V– with 100kΩ load - preserves signal fidelity. |
| 4 | V+ (Positive Supply) | Single positive rail connection; supports operation as low as 2.1V for brownout resilience. |
| 5 | +In (Non-Inverting Input) | High-impedance input node; no phase inversion occurs even if voltage exceeds V+ or falls below V–. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings to within 3mV of V+ and V– with 100kΩ load - maximizes usable output voltage range in 3.3V or lower systems. |
| MicroPower operation | 20µA quiescent current - reduces system standby power to sub-µW levels when paired with sleep-mode µCs. |
| Low input offset voltage | 125µV max over temperature - eliminates need for external trimming in portable test equipment calibration. |
| CMOS input stage | 1pA input bias current - enables stable DC coupling to photodiodes, piezoelectric sensors, and electrochemical cells. |
| No phase inversion | Inputs tolerate voltages beyond V+ or below V– without polarity reversal - improves robustness in unregulated sensor nodes. |
Applications
| Photodiode Pre-Amplifier | Precision Integrator |
|---|---|
Use Scenario: Converting weak photocurrent (pA–nA) from ambient light or pulse oximetry sensors into measurable voltage. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias current and rail-to-rail output. Use Value: 1pA input bias prevents signal loss across >1GΩ feedback resistors; 3mV output headroom preserves SNR in 3.3V ADC interfaces. |
Use Scenario: Accumulating charge from radiation detectors or capacitive touch controllers over seconds to minutes. IC Role / Device Role / Timing Role: Low-drift, low-IQ op-amp in integrator loop with FET-input stability. Use Value: 125µV max VOS limits integration error to <1mV after 60s; 20µA IQ enables multi-year battery life in remote monitors. |
| Battery-Powered Instrumentation | Medical Sensor Front-End |
Use Scenario: Signal conditioning in handheld multimeters, pH meters, or portable gas analyzers powered by coin cells. IC Role / Device Role / Timing Role: General-purpose precision amplifier operating from 2.3V–5.5V single supply. Use Value: Wide supply range eliminates need for LDO; rail-to-rail I/O maintains accuracy across full battery discharge curve (3.0V → 2.3V). |
Use Scenario: Amplifying low-level bio-signals (ECG, EEG) in wearable diagnostic patches with strict power budgets. IC Role / Device Role / Timing Role: First-stage gain block with high CMRR and minimal power-induced thermal drift. Use Value: 90dB CMRR at DC rejects electrode offset; 20µA IQ allows continuous 72-hour monitoring on a single AAA battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision, low-power operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6001T-E/OT | Higher IQ (100µA), wider VS (1.8–6.0V), 150µV VOS max, same SOT23-5 package. | Less suitable for multi-year battery life; better for 1.8V logic-compatible systems. | Select when 1.8V operation or higher drive strength is required, and 5× higher IQ is acceptable. |
| LTC1540CS5#TRMPBF | 1.2µA IQ, but only 10kHz GBW, 1.5mV VOS, no rail-to-rail output - limited bandwidth and accuracy. | Applicable only in ultra-low-power, sub-1kHz monitoring (e.g., environmental logging), not precision sensing. | Select only for extreme energy-constrained applications where bandwidth and offset tolerance are secondary to IQ. |
Compared with MCP6001T-E/OT and LTC1540CS5#TRMPBF, OPA336NJ/3K uniquely balances 20µA quiescent current, 125µV offset, rail-to-rail output, and 100kHz bandwidth - making it the optimal choice for portable medical and instrumentation designs requiring both precision and multi-year battery life.
Availability
OPA336NJ/3K is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and high-impedance sensor interfaces requiring stable component supply across extended production lifecycles.
Supply support for OPA336NJ/3K 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-amps and low-power signal chain solutions.
The OPA336NJ/3K belongs to TI's microAmplifier™ series - engineered specifically for single-supply, microPower applications in portable and battery-critical systems where quiescent current, input bias, and rail-to-rail performance define system viability.
FAQ
What is the maximum operating supply voltage for OPA336NJ/3K?
The absolute maximum supply voltage for OPA336NJ/3K is 7.5V, but its specified operating range is 2.3V to 5.5V. Operation above 5.5V voids guaranteed performance and risks parametric degradation. For long-term reliability in 5V systems, TI recommends staying within the 2.3V–5.5V range where all parameters - including offset voltage, CMRR, and output swing - are fully characterized and warranted. OPA336NJ/3K remains functional down to 2.1V, though some specs may degrade outside the rated range.
Does OPA336NJ/3K support rail-to-rail input common-mode range?
OPA336NJ/3K supports rail-to-rail *output*, but its input common-mode range extends from V– – 0.2V to V+ – 1V - not full rail-to-rail input. This means the non-inverting and inverting inputs can operate down to 0.2V below ground (in single-supply configurations) but cannot reach within 1V of the positive rail. This design enables robust operation with high open-loop gain and low input bias current while maintaining stability. OPA336NJ/3K does not exhibit phase inversion when inputs exceed the supply rails, unlike many older op-amps.
Can OPA336NJ/3K drive capacitive loads, and what is the recommended approach?
OPA336NJ/3K can drive up to ~300pF in unity-gain configuration without external compensation. For larger capacitive loads (e.g., ADC input capacitance or long traces), TI recommends inserting a 50Ω–100Ω resistor inside the feedback loop - between the output and inverting input - to isolate the op-amp's output impedance from the load capacitance and preserve phase margin. This technique maintains DC accuracy while suppressing ringing. OPA336NJ/3K has been verified to drive >1000pF when combined with a 25kΩ resistive load referenced to mid-supply.
What is the ESD rating for OPA336NJ/3K, and how should it be handled?
OPA336NJ/3K is rated for 1000V Charged Device Model (CDM), 500V Human Body Model (HBM), and 100V Machine Model (MM) ESD protection. Due to its CMOS input structure, it is susceptible to ESD damage - especially at the input pins. TI mandates handling with grounded wrist straps, anti-static mats, and ionized air environments. Board-level protection (e.g., series resistors + TVS diodes) is advised in field-deployed systems. Never apply signals exceeding V+ + 0.3V or V– – 0.3V without current limiting to 10mA, as specified in the absolute maximum ratings.
Is OPA336NJ/3K pin-compatible with other variants like OPA336NA/3K or OPA336U?
OPA336NJ/3K shares identical pinout and electrical behavior with OPA336NA/3K (both SOT23-5), differing only in temperature grade marking (J = –40°C to +85°C, A = same range with enhanced screening). However, it is *not* pin-compatible with SO-8 versions like OPA336U, which uses an 8-pin layout with NC pins and different pin assignments. Substituting OPA336NJ/3K for OPA336U requires PCB redesign. Always verify package drawing DBV (SOT23-5) versus D (SO-8) before replacement - OPA336NJ/3K must be used only in SOT23-5 footprints.
OPA336NJ/3K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.03V/µs
- Gain Bandwidth Product:
- 100 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 23µA
- Current - Output / Channel:
- 5 mA
- Voltage - Supply Span (Min):
- 2.3 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
OPA336NJ/3K FAQ
1.How can I place an order for OPA336NJ/3K through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA336NJ/3K 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 OPA336NJ/3K reliable?
The price and inventory of OPA336NJ/3K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA336NJ/3K is usually 5 days.
3.What payment methods are accepted for OPA336NJ/3K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA336NJ/3K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA336NJ/3K?
OPA336NJ/3K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA336NJ/3K 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 OPA336NJ/3K?
For technical support, including OPA336NJ/3K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA336NJ/3K requirements.
6.How does Aetrix verify that OPA336NJ/3K is sourced from the original manufacturer or authorized distributors?
All OPA336NJ/3K 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 OPA336NJ/3K meets industry standards.
7.What is the process for return or replacement of OPA336NJ/3K?
All OPA336NJ/3K units undergo pre-shipment inspection (PSI). If there is an issue with OPA336NJ/3K, 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 OPA336NJ/3K part is unused and in its original packaging.
Return procedure for OPA336NJ/3K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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