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Texas Instruments OPA703UA/2K5
- Part No.:
- OPA703UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA703UA/2K5.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,040
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Product details
Overview
OPA703UA/2K5 from Texas Instruments is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for unity-gain stability, 1 MHz gain-bandwidth product, 0.6 V/µs slew rate, and ultra-low quiescent current (160 µA). It operates from ±2 V to ±6 V dual supplies or 4 V to 12 V single supply, and delivers 40 mV rail-to-rail output swing into 100 kΩ - ideal for low-power sensor signal conditioning in portable instrumentation.
For engineers reviewing the OPA703UA/2K5 datasheet, OPA703UA/2K5 pinout, OPA703UA/2K5 application, or OPA703UA/2K5 equivalent, key selection criteria include its guaranteed rail-to-rail I/O performance across –40°C to +85°C, 1 pA input bias current, 90 dB full-scale CMRR, and SO-8 package compatibility with legacy board layouts requiring minimal redesign.
Technical Context
The OPA703UA/2K5 uses a complementary differential input stage enabling rail-to-rail common-mode input range (extending 300 mV beyond rails) and a class-AB output stage achieving 40 mV output swing from supply rails under light load. Its unity-gain stability and 1 MHz GBW support precision buffering and active filtering without external compensation.
Specified over ±2 V to ±6 V (or 4–12 V single supply), it maintains 160 µA quiescent current across temperature and supply voltage, with input offset voltage of ±160 µV (typ), 90 dB CMRR at DC, and 45 nV/√Hz input voltage noise density - balancing speed, precision, and power efficiency for battery-operated systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1 MHz - supports stable unity-gain configurations for precision buffering and anti-aliasing filters. |
| Slew Rate | 0.6 V/µs - enables accurate reproduction of ≤100 kHz full-scale sine waves with <0.1% distortion. |
| Input Offset Voltage | ±160 µV (max) - ensures ≤1.6 mV error in 10 V full-scale measurement systems without trimming. |
| Quiescent Current | 160 µA per amplifier - allows operation on coin-cell batteries for >1 year in always-on sensor nodes. |
| Rail-to-Rail Output Swing | 40 mV from rail (RL = 100 kΩ) - preserves >99% dynamic range in 3.3 V or 5 V systems. |
| Input Bias Current | 1 pA (max) - minimizes voltage error across high-impedance sources (e.g., pH electrodes, photodiodes). |
| CMRR | 90 dB (full-scale) - rejects >30 kΩ unbalanced source impedance common-mode noise in industrial sensors. |
Pinout & Package
OPA703UA/2K5 is housed in an industry-standard SOIC-8 (SO-8) surface-mount package, 4.9 mm × 3.9 mm × 1.45 mm, RoHS-compliant, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out | Amplifier output node; drives loads up to ±10 mA with rail-to-rail swing. |
| 2 | –In | Inverting input; accepts signals from (V–) – 0.3 V to (V+) + 0.3 V with ESD protection diodes. |
| 3 | +In | Non-inverting input; same voltage range as Pin 2; enables rail-to-rail common-mode operation. |
| 4 | V– | Negative supply pin; connects to ground (single supply) or negative rail (dual supply). |
| 5 | NC | No connect - internally unused; must remain floating or grounded per layout best practices. |
| 6 | NC | No connect - internally unused; no electrical function; avoid routing traces to this pin. |
| 7 | NC | No connect - internally unused; not bonded; leave unconnected per TI design guidelines. |
| 8 | V+ | Positive supply pin; supports 4–12 V single or ±2–±6 V dual supply operation. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization in low-voltage systems (e.g., 3.3 V ADC front-ends) without level-shifting. |
| 160 µA quiescent current | Reduces system power budget by >50% vs. comparable 1 MHz op amps, critical for energy-harvesting designs. |
| 1 pA input bias current | Eliminates significant offset errors when interfacing with megaohm-range sensors (e.g., thermistors, piezoelectrics). |
| Unity-gain stable | Permits direct use in voltage followers and active filters without external compensation components. |
| –40°C to +85°C operating range | Validated for automotive cabin electronics, industrial PLC I/O modules, and outdoor environmental monitors. |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
|
Use Scenario: Amplifying low-level bio-potential signals (ECG, EMG) from dry electrodes in handheld diagnostic devices. IC Role / Device Role / Timing Role: Precision DC-coupled buffer with rail-to-rail I/O, rejecting electrode half-cell potential drift. Use Value: 1 pA input bias prevents baseline wander; 160 µA IQ extends battery life to >100 hours on two AAA cells. |
Use Scenario: Conditioning 4–20 mA loop sensor outputs in modular PLC analog input cards. IC Role / Device Role / Timing Role: High-impedance receiver and level translator driving SAR ADC reference buffers. Use Value: 90 dB CMRR suppresses common-mode noise from shared 24 V DC bus; rail-to-rail output matches 0–5 V ADC input range. |
| Automotive Cabin Audio Preamp | Low-Power Test Equipment |
|
Use Scenario: Microphone preamplification in vehicle infotainment systems with 5 V single-supply architecture. IC Role / Device Role / Timing Role: Low-noise, low-distortion gain stage preceding audio codec ADC. Use Value: 45 nV/√Hz input noise ensures >90 dB SNR; 0.6 V/µs slew rate handles 20 kHz audio bandwidth cleanly. |
Use Scenario: Input buffer for handheld multimeters and portable oscilloscope front-ends. IC Role / Device Role / Timing Role: High-Z, low-drift signal conditioner isolating DMM input from internal circuitry. Use Value: ±160 µV offset contributes <0.01% error in 10 V range; 1 MHz GBW supports fast auto-ranging response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | Zero-drift architecture; 0.02 µV/°C offset drift vs. OPA703UA/2K5's ±4 µV/°C; 350 µA IQ. | Better long-term DC stability in precision weigh scales; higher power disqualifies ultra-low-power use cases. | Select when microvolt-level drift over temperature is critical and 200 µA extra IQ is acceptable. |
| MCP6001T-E/OT | Lower cost; 100 kHz GBW; 0.6 V/µs SR; 100 nA IB; SO-8 package; 100% pin-compatible. | Suitable for non-critical signal conditioning (e.g., LED dimming feedback); insufficient for 100 kHz+ data acquisition. | Choose for cost-sensitive consumer applications where 1 MHz bandwidth and pA bias are unnecessary. |
Compared with OPA333AIDBVR and MCP6001T-E/OT, the OPA703UA/2K5 uniquely balances 1 MHz bandwidth, pA input bias, rail-to-rail I/O, and 160 µA quiescent current - making it optimal for portable, precision, low-voltage sensor interfaces where all four parameters are simultaneously required.
Availability
OPA703UA/2K5 is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition modules, and automotive cabin audio preamps requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for OPA703UA/2K5 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 amp design and manufacturing.
The OPA703 series belongs to TI's precision rail-to-rail CMOS op amp product line, engineered specifically for low-power, high-accuracy signal conditioning in space-constrained, battery-operated, and industrial sensing applications.
FAQ
What is the maximum capacitive load the OPA703UA/2K5 can drive stably?
The OPA703UA/2K5 can drive up to 1000 pF pure capacitive load while maintaining stability. For unity-gain configurations with >100 pF loads, TI recommends inserting a 10 Ω to 20 Ω series resistor inside the feedback loop to reduce ringing without affecting DC accuracy. This capability makes the OPA703UA/2K5 suitable for driving ADC input capacitance and long PCB traces in data acquisition systems.
Does the OPA703UA/2K5 exhibit phase inversion when inputs exceed the supply rails?
No, the OPA703UA/2K5 does not exhibit phase inversion when inputs extend beyond the supply rails, provided input current is limited to ≤10 mA using a series resistor. This behavior is confirmed in TI's SBOS180A datasheet Figure 4 and stems from its complementary input stage architecture - a key reliability feature for fault-tolerant sensor interfaces where transient overvoltage events may occur.
What is the thermal resistance (θJA) of the OPA703UA/2K5 in SO-8 package?
The OPA703UA/2K5 in SO-8 package has a junction-to-ambient thermal resistance (θJA) of 150 °C/W, as specified in the SBOS180A datasheet. At 160 µA quiescent current and typical 5 V operation, power dissipation remains below 1 mW, resulting in negligible self-heating - ensuring stable offset and gain performance across ambient temperatures from –40°C to +85°C.
Can the OPA703UA/2K5 be used in dual-supply configurations with ±3 V?
Yes, the OPA703UA/2K5 is fully specified and guaranteed for dual-supply operation from ±2 V to ±6 V, including ±3 V. At ±3 V, it maintains 160 µA quiescent current, ±160 µV input offset voltage, 90 dB CMRR, and rail-to-rail input/output swing - enabling robust performance in legacy ±3 V industrial control and test equipment designs.
Is the OPA703UA/2K5 RoHS compliant and what is its moisture sensitivity level?
Yes, the OPA703UA/2K5 is RoHS compliant and rated MSL Level-2-260°C-1 year per JEDEC J-STD-020. This means it may be stored for up to 1 year at ≤30°C/60% RH before reflow, and requires bake-out only if exposed beyond that limit - simplifying handling for contract manufacturers and small-batch prototyping labs.
OPA703UA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.6V/µs
- Gain Bandwidth Product:
- 1 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:
- 8-SOIC
OPA703UA/2K5 FAQ
1.How can I place an order for OPA703UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA703UA/2K5 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 OPA703UA/2K5 reliable?
The price and inventory of OPA703UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA703UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA703UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA703UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA703UA/2K5?
OPA703UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA703UA/2K5 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 OPA703UA/2K5?
For technical support, including OPA703UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA703UA/2K5 requirements.
6.How does Aetrix verify that OPA703UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA703UA/2K5 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 OPA703UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA703UA/2K5?
All OPA703UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA703UA/2K5, 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 OPA703UA/2K5 part is unused and in its original packaging.
Return procedure for OPA703UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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