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Texas Instruments OPA2703UA/2K5G4
- Part No.:
- OPA2703UA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2703UA/2K5G4.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,288
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Product details
Overview
OPA2703UA/2K5G4 from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS operational amplifier optimized for unity-gain stable operation with 1 MHz gain-bandwidth product, 0.6 V/µs slew rate, and 160 µA quiescent current per amplifier. It operates from ±2 V to ±6 V dual supplies (or 4 V to 12 V single supply), delivers 40 mV output swing from rail at light load, and supports automotive sensor amplification and portable data acquisition.
For engineers reviewing the OPA2703UA/2K5G4 datasheet, OPA2703UA/2K5G4 pinout, OPA2703UA/2K5G4 application, or OPA2703UA/2K5G4 equivalent, key selection criteria include rail-to-rail I/O performance in low-voltage systems, ultra-low power consumption for battery-powered instrumentation, and guaranteed operation across –40°C to +85°C industrial temperature range.
Technical Context
The OPA2703UA/2K5G4 implements a complementary input stage-parallel N-channel and P-channel differential pairs-to achieve rail-to-rail input common-mode range extending 300 mV beyond both supply rails. Its class-AB output stage enables rail-to-rail output swing down to 40 mV from V+ or V– under 100 kΩ load.
This dual op amp is unity-gain stable and specified for full-rail operation across its entire supply range. It features 1 pA typical input bias current, 90 dB full-scale CMRR, and 160 µV max input offset voltage-enabling precision signal conditioning without external trimming in transducer and reference buffer applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1 MHz - supports stable unity-gain buffering and low-frequency active filtering up to ~100 kHz closed-loop bandwidth |
| Slew Rate | 0.6 V/µs - limits large-signal settling for ≤1 V step inputs to <20 µs (0.01%); suitable for DC–100 kHz sensor signal paths |
| Input Offset Voltage | ±160 µV max - enables direct interfacing with 16-bit DACs (e.g., DAC7644) without offset calibration circuitry |
| Quiescent Current | 160 µA per amplifier - allows dual-channel operation from coin-cell or energy-harvesting sources with <330 µW total dissipation at ±5 V |
| Rail-to-Rail Output Swing | 40 mV from rail (RL = 100 kΩ) - preserves >99% of dynamic range in 3.3 V or 5 V systems, critical for low-supply ADC driver stages |
| Common-Mode Rejection Ratio | 90 dB full-scale - rejects power supply ripple and EMI-induced common-mode noise in noisy automotive or industrial environments |
| Input Bias Current | 1 pA typical - eliminates significant voltage error across high-impedance sources (e.g., pH electrodes, piezoelectric sensors) |
Pinout & Package
OPA2703UA/2K5G4 is housed in an 8-pin SOIC (SO-8) surface-mount package with standard pinout compatible with industry-wide layout footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +In A | Non-inverting input of Amplifier A - accepts signals from V– – 0.3 V to V+ + 0.3 V; no phase inversion beyond rails if current-limited |
| 2 | –In A | Inverting input of Amplifier A - high-impedance node (5 TΩ || 4 pF) enabling precision feedback networks |
| 3 | Out A | Amplifier A output - drives capacitive loads up to 1000 pF; rail-to-rail swing supports full-scale signal integrity |
| 4 | V– | Negative supply pin - connects to ground (single supply) or negative rail (dual supply); bypass with 1 µF tantalum + 1000 pF ceramic |
| 5 | Out B | Amplifier B output - independent channel; identical AC/DC specs to Out A; enables dual-path signal conditioning |
| 6 | –In B | Inverting input of Amplifier B - electrically isolated from Channel A; supports separate feedback configurations |
| 7 | +In B | Non-inverting input of Amplifier B - same rail-to-rail input range as Pin 1; enables dual-input sensor interfaces |
| 8 | V+ | Positive supply pin - accepts 4 V to 12 V single or ±2 V to ±6 V dual; thermal resistance θJA = 150 °C/W |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization in 3.3 V and 5 V systems; input extends 300 mV beyond rails, output swings to within 40 mV |
| 160 µA quiescent current per amplifier | Supports always-on sensor monitoring in battery-powered devices with multi-year runtime (e.g., IoT node front-ends) |
| 1 pA input bias current | Eliminates offset errors in high-Z source applications like photodiode transimpedance or electrochemical sensor buffers |
| Unity-gain stability | Guarantees stable operation without external compensation in buffer, gain-of-one, or active filter configurations |
| –40°C to +85°C operating range | Qualified for automotive cabin electronics, industrial PLC analog I/O modules, and outdoor environmental monitoring hardware |
Applications
| Automotive Cabin Sensor Interface | Portable Data Acquisition Front-End |
|---|---|
|
Use Scenario: Amplifying low-level signals from MEMS accelerometers and humidity sensors in vehicle infotainment control modules. IC Role / Device Role / Timing Role: Dual-channel rail-to-rail op amp providing buffered, offset-compensated analog outputs to 16-bit SAR ADCs. Use Value: 160 µV max offset and 1 pA bias current prevent drift-induced false triggers; 160 µA/channel enables continuous sensing on 12 V vehicle bus with minimal load. |
Use Scenario: Signal conditioning for handheld multimeters and portable oscilloscope probes with battery operation. IC Role / Device Role / Timing Role: Dual amplifier configured as precision DC-coupled buffer and programmable gain stage ahead of sigma-delta ADC. Use Value: Rail-to-rail I/O preserves full 0–3.3 V ADC range; 160 µA/channel extends AA battery life beyond 200 hours in active measurement mode. |
| Low-Power Reference Buffering | Active Filter for Medical Instrumentation |
|
Use Scenario: Isolating and driving precision voltage references (e.g., REF5025) for multi-channel DACs in patient monitoring equipment. IC Role / Device Role / Timing Role: Unity-gain buffer decoupling reference output from DAC input capacitance and digital switching noise. Use Value: 90 dB CMRR rejects supply ripple; 40 mV output swing ensures ≥2.46 V headroom for 2.5 V reference under 10 kΩ load. |
Use Scenario: Implementing 2nd-order Sallen-Key low-pass filters in ECG front-end amplifiers to suppress 50/60 Hz interference. IC Role / Device Role / Timing Role: Dual op amp realizing filter transfer function with matched gain-bandwidth and low THD+N (0.02%) at 1 kHz. Use Value: 1 MHz GBW supports cutoff frequencies up to 100 kHz; rail-to-rail output prevents clipping of filtered bio-potential waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Zero-drift architecture; 0.02 µV/°C offset drift vs. OPA2703UA/2K5G4's ±4 µV/°C; higher 350 µA IQ | Better long-term DC stability in thermocouple amplifiers; less suitable for ultra-low-power portable use | Select when microvolt-level offset drift over temperature is critical and power budget allows >2× IQ |
| MCP6022-I/SN | Lower 175 kHz GBW; 2.3 V to 5.5 V supply only; 100 µA IQ; no guaranteed rail-to-rail input beyond rails | Cost-optimized for consumer-grade 3.3 V systems; insufficient for ±5 V industrial designs or full-rail input requirements | Select for cost-sensitive, single-supply 3.3 V applications where 1 MHz bandwidth and extended input range are not required |
Compared with OPA2703UA/2K5G4, OPA2333AIDR offers superior DC precision at higher power cost, while MCP6022-I/SN provides lower-cost operation in narrow supply ranges but sacrifices bandwidth, input range, and temperature robustness.
Availability
OPA2703UA/2K5G4 is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable test equipment, and low-power medical instrumentation requiring stable component supply and guaranteed industrial temperature operation.
Supply support for OPA2703UA/2K5G4 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 delivering analog and embedded processing solutions with focus on reliability, precision, and energy efficiency.
The OPA703/2703/4703 family was designed for ultra-low-power, rail-to-rail signal conditioning in space-constrained, battery-operated, and automotive-qualified systems demanding high DC accuracy and wide supply flexibility.
FAQ
What is the maximum capacitive load drive capability of the OPA2703UA/2K5G4?
The OPA2703UA/2K5G4 can drive up to 1000 pF of pure capacitive load while maintaining stability. For unity-gain configurations with heavy capacitive loads, inserting a 10 Ω to 20 Ω series resistor inside the feedback loop (between output and inverting input) reduces ringing without affecting DC accuracy. This behavior is confirmed in the SBOS180A datasheet Figure 5 and "Capacitive Load and Stability" section.
Does the OPA2703UA/2K5G4 support true rail-to-rail input beyond the supply rails?
Yes-the OPA2703UA/2K5G4 input common-mode voltage range extends 300 mV beyond both V+ and V– rails at room temperature, enabled by its complementary N-channel/P-channel input stage. Input signals exceeding the rails by ≤300 mV are safely handled without phase inversion, provided input current is limited to ≤10 mA using a series resistor, as documented in the "Input Voltage" section of SBOS180A.
What is the thermal performance of the OPA2703UA/2K5G4 in SOIC-8 package?
The OPA2703UA/2K5G4 in SOIC-8 (package D) has a junction-to-ambient thermal resistance (θJA) of 150 °C/W, per the SBOS180A datasheet. At maximum rated quiescent current (200 µA per amplifier) and ±5 V supply, total power dissipation is ~2 mW, resulting in negligible self-heating (<0.3 °C rise) under typical PCB conditions with minimal copper pour.
Can the OPA2703UA/2K5G4 be used in single-supply 3.3 V applications?
Yes-the OPA2703UA/2K5G4 is fully specified for single-supply operation from 4 V to 12 V, so 3.3 V falls below its minimum rated supply. However, functional operation may occur down to 3.6 V (per "Operating Voltage Range" table), but parameters like output swing, CMRR, and GBW are not guaranteed below 4 V. For reliable 3.3 V designs, TI recommends the OPA333 or OPA376 families instead.
How does the OPA2703UA/2K5G4 differ from the OPA2704UA/2K5G4?
The OPA2703UA/2K5G4 is unity-gain stable with 1 MHz GBW and 0.6 V/µs slew rate, while the OPA2704UA/2K5G4 is optimized for gains ≥5, offering 3 MHz GBW and 3 V/µs slew rate but not unity-gain stable. Their pinouts and packages are identical, but gain configuration must match the device variant-using OPA2704 in unity-gain risks oscillation, and OPA2703 in G≥5 forfeits speed advantages.
OPA2703UA/2K5G4 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:
- CMOS
- Number of Circuits:
- 2
- 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 (x2 Channels)
- 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
OPA2703UA/2K5G4 FAQ
1.How can I place an order for OPA2703UA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2703UA/2K5G4 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 OPA2703UA/2K5G4 reliable?
The price and inventory of OPA2703UA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2703UA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA2703UA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2703UA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2703UA/2K5G4?
OPA2703UA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2703UA/2K5G4 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 OPA2703UA/2K5G4?
For technical support, including OPA2703UA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2703UA/2K5G4 requirements.
6.How does Aetrix verify that OPA2703UA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA2703UA/2K5G4 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 OPA2703UA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA2703UA/2K5G4?
All OPA2703UA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2703UA/2K5G4, 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 OPA2703UA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA2703UA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2703UA/2K5G4 Tags
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