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Texas Instruments OPA336NJ/3KG4
- Part No.:
- OPA336NJ/3KG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA336NJ/3KG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,887
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Product details
Overview
OPA336NJ/3KG4 from Texas Instruments is a single-channel, rail-to-rail output, microPower CMOS operational amplifier designed for ultra-low-power, single-supply 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 battery-powered medical instruments and portable sensor interfaces.
For engineers reviewing the OPA336NJ/3KG4 datasheet, OPA336NJ/3KG4 pinout, OPA336NJ/3KG4 application, or OPA336NJ/3KG4 equivalent, key selection criteria include its 2.3V–5.5V operating range, 1pA input bias current, 115dB open-loop gain, and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The OPA336NJ/3KG4 employs a CMOS input stage with common-mode input range extending to the negative rail (V– – 0.2V), supporting true single-supply operation down to 2.1V. Its unity-gain stable architecture features low input capacitance and high impedance (10¹³ Ω || 2 pF differential), minimizing loading on high-impedance sources like photodiodes.
Output stage design enables rail-to-rail swing with 3mV headroom at light loads and maintains stability driving capacitive loads up to 300pF in unity-gain configuration. Thermal performance is characterized across –40°C to +85°C, with junction temperature rated to 150°C and MSL Level-1 reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.3V to 5.5V - supports direct connection to Li-ion, coin-cell, or regulated 3.3V/5V rails without level-shifting. |
| Quiescent Current | 20µA per amplifier - enables multi-year battery life in always-on portable instrumentation. |
| Input Offset Voltage | 125µV max - ensures <0.01% gain error in 10-bit precision signal chains without trimming. |
| Input Bias Current | 1pA typical - preserves signal integrity in photodiode pre-amplifiers and high-Z sensor interfaces. |
| Open-Loop Gain | 115dB - provides >300,000 V/V loop gain for accurate closed-loop gain setting with minimal error. |
| Output Swing | Within 3mV of rails (RL = 100kΩ) - maximizes dynamic range in low-voltage ADC front-ends. |
| Gain-Bandwidth Product | 100kHz - suitable for DC-coupled sensor amplification and low-frequency filtering (e.g., <10kHz bio-signal acquisition). |
Pinout & Package
SOT23-5 surface-mount package (DBV drawing), 5-pin, 1.6mm × 2.9mm footprint, MSL Level-1, lead finish NIPDAU, pin 1 quadrant Q3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V–) | Negative supply / ground reference | Connects to system ground or negative rail; common-mode range extends to this pin minus 0.2V. |
| 2 (–In) | Inverting input | High-impedance node (10¹³ Ω); accepts signals down to V– – 0.2V without phase inversion. |
| 3 (Out) | Amplifier output | Rail-to-rail capable; drives 100kΩ load to within 3mV of V+ or V–; stable with ≤300pF capacitive load. |
| 4 (V+) | Positive supply | Accepts 2.3V–5.5V single supply; bypass with 0.01µF ceramic capacitor near pin. |
| 5 (+In) | Non-inverting input | Matches –In in impedance and bias current; used for unity-gain buffer or non-inverting gain stages. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings to within 3mV of V+ or V– with 100kΩ load - preserves full ADC input range in 3.3V systems. |
| MicroPower operation | 20µA IQ enables >10-year battery life in 200mAh coin-cell applications running continuously. |
| Low input bias current | 1pA typical eliminates leakage-induced offset in photodiode transimpedance amplifiers. |
| Extended common-mode range | VCM = V– – 0.2V to V+ – 1V - allows direct sensing of signals referenced to ground in single-supply topologies. |
| Unity-gain stable | No external compensation required - simplifies layout and reduces BOM count in buffer/gain stages. |
Applications
| Battery-Powered Medical Sensors | Photodiode Signal Conditioning |
|---|---|
|
Use Scenario: Continuous glucose monitor (CGM) analog front-end amplifying low-current electrochemical sensor output. IC Role / Device Role / Timing Role: Transimpedance amplifier converting pA-level photocurrent to measurable voltage with minimal power draw. Use Value: 1pA input bias current prevents signal corruption; 20µA quiescent current extends disposable sensor patch lifetime beyond 7 days. |
Use Scenario: Pulse oximeter LED driver feedback loop and photodiode pre-amplifier in wearable health bands. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage maintaining linearity across 0.5–10Hz physiological signal band. Use Value: 125µV max offset voltage ensures <±0.5% measurement accuracy; rail-to-rail output fully utilizes 12-bit ADC range. |
| Portable Test Equipment | High-Impedance Sensor Interfaces |
|
Use Scenario: Handheld multimeter input buffer isolating DMM front-end from high-impedance probe circuits. IC Role / Device Role / Timing Role: Unity-gain voltage follower providing high input impedance (>10¹³ Ω) and low output impedance. Use Value: Input impedance minimizes loading on 10MΩ probes; 115dB open-loop gain ensures <0.001% gain error. |
Use Scenario: pH electrode amplifier in portable water quality analyzers requiring ultra-low input current. IC Role / Device Role / Timing Role: Non-inverting amplifier with guarded input traces to reject leakage paths in high-humidity environments. Use Value: 1pA bias current prevents electrode polarization drift; extended common-mode range accommodates asymmetric electrode offsets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA340UA/2K5 | Higher GBW (8MHz vs 100kHz), 500µA IQ, SO-8 package - trades power for bandwidth. | Better suited for audio or higher-frequency sensor signals; not viable for multi-year battery operation. | Select when bandwidth >100kHz is required and power budget allows ≥500µA per channel. |
| MCP6001T-I/OT | Similar 1µA IQ, but 1.6V min supply, 100µV offset, SOT23-5 - lower voltage capability, slightly higher offset. | Valid for sub-2.3V systems (e.g., single alkaline cell); less precise for <0.1% accuracy requirements. | Choose for cost-sensitive, ultra-low-voltage designs where 100µV offset is acceptable. |
Compared with OPA336NJ/3KG4, OPA340UA/2K5 offers 80× more bandwidth at 50× higher current, while MCP6001T-I/OT enables 1.6V operation but sacrifices 25µV offset precision - making OPA336NJ/3KG4 optimal for 2.3V+ battery-powered precision DC applications.
Availability
OPA336NJ/3KG4 is available at Aetrix Electronics and suitable for battery-powered medical sensors, portable test equipment, photodiode signal conditioning, and high-impedance sensor interfaces requiring stable component supply across long-lifecycle industrial and healthcare programs.
Supply support for OPA336NJ/3KG4 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 90 years of innovation in precision analog ICs.
The OPA336NJ/3KG4 belongs to TI's microPower CMOS op-amp family, engineered specifically for ultra-low-power, single-supply signal conditioning in portable and battery-critical applications.
FAQ
What is the minimum operating voltage for the OPA336NJ/3KG4?
The OPA336NJ/3KG4 operates down to 2.1V, though it is fully specified from 2.3V to 5.5V. At 2.1V, key parameters including quiescent current (20µA), offset voltage (≤125µV), and rail-to-rail output swing remain functional - enabling use with aging alkaline or single LiFePO₄ cells. Performance validation at 2.1V is confirmed in TI's SBOS068C datasheet Figure 8.
Does the OPA336NJ/3KG4 support rail-to-rail input?
No, the OPA336NJ/3KG4 does not support rail-to-rail input. Its common-mode input range is specified from (V–) – 0.2V to (V+) – 1V. While inputs can exceed the supplies by ±0.3V without damage, normal linear operation requires staying within that range. This design prioritizes low bias current and offset over full rail-to-rail input - a trade-off confirmed in the Electrical Characteristics table on page 3 of SBOS068C.
What is the maximum capacitive load the OPA336NJ/3KG4 can drive stably?
In unity-gain configuration, the OPA336NJ/3KG4 drives up to 300pF stably without external compensation. With a 50–100Ω series resistor inside the feedback loop (as shown in Figure 3 of SBOS068C), it reliably handles >1000pF. Driving >300pF without isolation risks peaking or oscillation - verified via small-signal step response testing in Figure 4 and stability boundary analysis in Figure 5.
Is the OPA336NJ/3KG4 pin-compatible with other OPA336 variants?
Yes, all OPA336 variants in SOT23-5 packaging - including OPA336N, OPA336NA, and OPA336NJ - share identical pinout (V–, –In, Out, V+, +In). The "J" suffix denotes a specific temperature-grade marking (J36), but electrical and mechanical compatibility is maintained across these SOT23-5 versions per TI's PACKAGE/ORDERING INFORMATION table on page 2 of SBOS068C.
What is the ESD rating for the OPA336NJ/3KG4?
The OPA336NJ/3KG4 is rated for 1000V CDM (Charged Device Model), 500V HBM (Human Body Model), and 100V MM (Machine Model), as documented in the Absolute Maximum Ratings table on page 3 of SBOS068C. These values reflect enhanced ESD robustness specific to NJ/UJ variants - critical for handling during manual assembly or field-repair scenarios.
OPA336NJ/3KG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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/3KG4 FAQ
1.How can I place an order for OPA336NJ/3KG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA336NJ/3KG4 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/3KG4 reliable?
The price and inventory of OPA336NJ/3KG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA336NJ/3KG4 is usually 5 days.
3.What payment methods are accepted for OPA336NJ/3KG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA336NJ/3KG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA336NJ/3KG4?
OPA336NJ/3KG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA336NJ/3KG4 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/3KG4?
For technical support, including OPA336NJ/3KG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA336NJ/3KG4 requirements.
6.How does Aetrix verify that OPA336NJ/3KG4 is sourced from the original manufacturer or authorized distributors?
All OPA336NJ/3KG4 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/3KG4 meets industry standards.
7.What is the process for return or replacement of OPA336NJ/3KG4?
All OPA336NJ/3KG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA336NJ/3KG4, 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/3KG4 part is unused and in its original packaging.
Return procedure for OPA336NJ/3KG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA336NJ/3KG4 Tags
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