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Texas Instruments OPA704NA/3KG4
- Part No.:
- OPA704NA/3KG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA704NA/3KG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,481
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Product details
Overview
OPA704NA/3KG4 from Texas Instruments is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for non-inverting gains ≥5. It delivers 3MHz gain-bandwidth product, 3V/µs slew rate, 160µA quiescent current, ±160µV input offset voltage, and operates from ±2V to ±6V dual or 4V–12V single supply - enabling precision signal conditioning in automotive sensor interfaces and portable data acquisition systems.
For engineers reviewing the OPA704NA/3KG4 datasheet, OPA704NA/3KG4 pinout, OPA704NA/3KG4 application, or OPA704NA/3KG4 equivalent, key selection criteria include its gain-stability requirement (G ≥5), rail-to-rail output swing within 40mV of rails at light loads, low 1pA input bias current, and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The OPA704NA/3KG4 employs a complementary input stage enabling rail-to-rail common-mode input range extending 300mV beyond supply rails, and a class-AB output stage achieving rail-to-rail output swing to within 40mV of V+ and V− under 100kΩ load. Its internal compensation is optimized for closed-loop gains ≥5, delivering stable 3MHz bandwidth and 3V/µs slew rate without external compensation.
Unlike the unity-gain-stable OPA703 family, the OPA704NA/3KG4 sacrifices unity-gain stability to achieve higher speed and improved capacitive load drive at G ≥5 - evidenced by 0.6µs overload recovery time and reduced small-signal overshoot versus frequency when configured per recommended feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz at G ≥5 - enables accurate amplification of signals up to ~2MHz in non-inverting configurations with minimal phase lag. |
| Slew Rate | 3V/µs - supports fast settling of 5V step inputs in ≤21µs at 0.01% accuracy, critical for multiplexed ADC driver stages. |
| Input Offset Voltage | ±160µV max - ensures <0.01% gain error in 10V full-scale transducer amplifier applications without trimming. |
| Quiescent Current | 160µA per amplifier - allows battery-powered operation >1 year in always-on sensor nodes with 10mA-hr coin cells. |
| Rail-to-Rail Output Swing | Within 40mV of V+ and V− at RL = 100kΩ - preserves >99% dynamic range in 3.3V or 5V single-supply systems. |
| Input Bias Current | ±1pA max - eliminates significant voltage drop across high-impedance sources (e.g., pH electrodes, piezoelectric sensors). |
| CMRR | 90dB full-scale - rejects common-mode noise from shared power rails in automotive body control modules. |
Pinout & Package
SOT23-5 surface-mount package (5-pin, 2.9mm × 1.6mm footprint) with exposed thermal pad; JEDEC MO-178AC compliant; RoHS-compliant NiPdAu lead finish; MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - V− | Negative supply | Connect to ground (single supply) or negative rail (dual supply); bypass with 1µF tantalum + 1000pF ceramic. |
| 2 - –In | Inverting input | High-impedance node (5TΩ || 4pF); requires guarding in µV-level precision circuits. |
| 3 - Out | Amplifier output | Capable of sourcing/sinking ±10mA; drives 1kΩ loads directly; stable with ≤1000pF capacitive load at G ≥5. |
| 4 - +In | Non-inverting input | Complementary input pair extends common-mode range to (V−) − 0.3V and (V+) + 0.3V. |
| 5 - V+ | Positive supply | Accepts 4V–12V single or ±2V–±6V dual; quiescent current varies <10% across this range. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 3.3V/5V supply headroom in portable medical sensors and automotive cabin controllers. |
| Optimized for G ≥5 | Delivers 3× higher bandwidth and 5× faster slew than OPA703 at same gain, eliminating need for external compensation. |
| 160µA quiescent current | Supports continuous operation in energy-harvesting IoT nodes where average current must stay below 200µA. |
| 1pA input bias current | Permits direct interfacing with high-Z sources like photodiode arrays and MEMS accelerometers without guard traces. |
| −55°C to +125°C operating range | Validated for under-hood automotive applications including engine control unit (ECU) sensor signal conditioning. |
Applications
| Automotive Cabin Sensors | Portable Data Acquisition |
|---|---|
|
Use Scenario: Amplifying low-level analog outputs from humidity, CO₂, and occupancy sensors in vehicle HVAC control units. IC Role / Device Role / Timing Role: Signal-conditioning amplifier in front-end analog chain, providing gain and buffering before 12-bit SAR ADC sampling. Use Value: Rail-to-rail I/O preserves full sensor dynamic range across 3.3V supply; 160µA IQ extends battery life in wireless sensor nodes. |
Use Scenario: Buffering and scaling thermocouple or strain gauge outputs in handheld test equipment. IC Role / Device Role / Timing Role: Precision instrumentation amplifier stage driving multiplexed ADC inputs with minimal settling delay. Use Value: 3V/µs slew rate and 21µs 0.01% settling enable 50ksps sampling rates; 1pA IB prevents drift in high-impedance bridges. |
| Transducer Interface Modules | Low-Power Industrial Controllers |
|
Use Scenario: Conditioning piezoelectric vibration sensor outputs in predictive maintenance edge devices. IC Role / Device Role / Timing Role: Charge-amplifier front-end with selectable gain ≥5 to maximize SNR before digitization. Use Value: 3MHz GBW supports resonance detection up to 1.5MHz; rail-to-rail output avoids clipping during transient events. |
Use Scenario: Isolated analog input channel in DIN-rail PLC modules powered from 24V DC with local 3.3V LDO. IC Role / Device Role / Timing Role: Input buffer and level-shifter between field-side sensors and isolated ADC interface. Use Value: ±160µV VOS ensures <0.005% measurement error over temperature; −40°C to +85°C rating matches industrial ambient specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA704NA/3K | Identical electrical specs and SOT23-5 package; differs only in tape-and-reel packaging (3000 pcs vs. 3000 pcs with G4 suffix denoting TI's green packaging standard). | No functional difference; both qualified for automotive AEC-Q100 Grade 3 (−40°C to +85°C). | Select OPA704NA/3KG4 when RoHS-compliant, halogen-free, and matte-tin lead finish per TI's green policy is required. |
| OPA2333AIDR | Zero-drift architecture; 0.02µV/°C offset drift vs. ±4µV/°C for OPA704; 350nA IQ vs. 160µA; 350kHz GBW vs. 3MHz. | Better DC precision but lower speed; suited for weigh scales and medical diagnostics, not high-speed data acquisition. | Choose OPA2333AIDR only when ultra-low drift dominates over bandwidth and power; OPA704NA/3KG4 remains superior for G ≥5 AC-coupled signal chains. |
Compared with OPA704NA/3K, the /3KG4 variant adds TI's green packaging compliance without performance trade-offs; compared with OPA2333AIDR, the OPA704NA/3KG4 provides 8.5× higher bandwidth and 450× lower quiescent current for battery-sensitive, medium-speed applications.
Availability
OPA704NA/3KG4 is available at Aetrix Electronics and suitable for automotive cabin sensors, portable data acquisition systems, and low-power industrial controllers requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for OPA704NA/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 decades of expertise in precision op amps and signal-chain solutions.
The OPA704 series belongs to TI's precision rail-to-rail CMOS op amp product line, designed specifically for low-power, medium-speed applications demanding high DC accuracy and wide supply flexibility in automotive and portable electronics.
FAQ
Is OPA704NA/3KG4 unity-gain stable?
No, the OPA704NA/3KG4 is not unity-gain stable. It is internally compensated for stable operation only at non-inverting closed-loop gains of 5 or greater. Using it at G = 1 risks oscillation and excessive overshoot; for unity-gain applications, select the pin-compatible OPA703NA/3KG4 instead.
What is the maximum capacitive load OPA704NA/3KG4 can drive reliably?
The OPA704NA/3KG4 can drive up to 1000pF of pure capacitive load while maintaining stability at G ≥5. At lower gains, stability margin decreases significantly - always verify phase margin with simulation or bench testing when driving >100pF at G = 5.
Does OPA704NA/3KG4 support single-supply operation?
Yes, OPA704NA/3KG4 operates from a single supply of 4V to 12V. Its rail-to-rail input and output allow full-swing signal handling even at 3.3V logic-compatible supplies, provided the common-mode input stays within (V−) − 0.3V to (V+) + 0.3V.
What does the "G4" suffix in OPA704NA/3KG4 signify?
The "G4" suffix indicates TI's green packaging standard: halogen-free, RoHS-compliant, matte-tin lead finish, and compliant with IPC/JEDEC J-STD-609A Class 4 moisture sensitivity. Electrically and functionally identical to OPA704NA/3K.
Can OPA704NA/3KG4 replace OPA2704EA in a dual-amplifier design?
No - OPA704NA/3KG4 is a single-channel SOT23-5 device, while OPA2704EA is a dual-channel MSOP-8 amplifier. They are not pin-compatible or functionally interchangeable. For dual-channel equivalents, consider OPA2704EA/250 or OPA2704UA/2K5.
OPA704NA/3KG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- 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:
- 3V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 160 µV
- Current - Supply:
- 160µA
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
OPA704NA/3KG4 FAQ
1.How can I place an order for OPA704NA/3KG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA704NA/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 OPA704NA/3KG4 reliable?
The price and inventory of OPA704NA/3KG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA704NA/3KG4 is usually 5 days.
3.What payment methods are accepted for OPA704NA/3KG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA704NA/3KG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA704NA/3KG4?
OPA704NA/3KG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA704NA/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 OPA704NA/3KG4?
For technical support, including OPA704NA/3KG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA704NA/3KG4 requirements.
6.How does Aetrix verify that OPA704NA/3KG4 is sourced from the original manufacturer or authorized distributors?
All OPA704NA/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 OPA704NA/3KG4 meets industry standards.
7.What is the process for return or replacement of OPA704NA/3KG4?
All OPA704NA/3KG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA704NA/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 OPA704NA/3KG4 part is unused and in its original packaging.
Return procedure for OPA704NA/3KG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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