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Texas Instruments OPA2703UA/2K5
- Part No.:
- OPA2703UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2703UA/2K5.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,633
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Product details
Overview
OPA2703UA/2K5 from Texas Instruments is a dual-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 per amplifier). It operates from ±2 V to ±6 V dual supplies or 4 V to 12 V single supply, and is specified over –40°C to +85°C for automotive sensor interfaces and portable data acquisition systems.
For engineers reviewing the OPA2703UA/2K5 datasheet, OPA2703UA/2K5 pinout, OPA2703UA/2K5 application, or OPA2703UA/2K5 equivalent, key selection criteria include rail-to-rail I/O swing (within 40 mV of rails at light load), low input bias current (1 pA), high CMRR (90 dB full-scale), and SOIC-8 packaging with industry-standard pinout for drop-in compatibility in dual-opamp signal conditioning stages.
Technical Context
The OPA2703UA/2K5 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 delivers rail-to-rail output swing, enabling full dynamic range utilization in low-voltage systems.
Designed for unity-gain stability, it maintains 1 MHz GBW and 0.6 V/µs slew rate across its full operating voltage and temperature range (–40°C to +85°C), with guaranteed performance at RL ≥ 20 kΩ and open-loop gain > 100 dB under typical conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1 MHz - supports stable unity-gain buffer and low-gain amplification up to ~100 kHz with phase margin > 60° |
| Slew Rate | 0.6 V/µs - enables accurate reproduction of ≤100 kHz full-scale sine waves without slew-induced distortion |
| Input Offset Voltage | ±160 µV (max) - ensures ≤1.6 mV error in 10 V full-scale measurement circuits at room temperature |
| Quiescent Current | 160 µA per amplifier - allows dual-channel operation from coin-cell or energy-harvesting sources |
| CMRR | 90 dB (full-scale) - rejects >30 kΩ unbalanced source impedance effects in precision transducer interfaces |
| Rail-to-Rail Output Swing | Within 40 mV of rails (RL = 100 kΩ) - preserves >99% of available signal headroom in 3.3 V or 5 V systems |
| Input Bias Current | 1 pA (typ) - minimizes voltage error across high-impedance sensors (e.g., pH electrodes, photodiodes) |
Pinout & Package
OPA2703UA/2K5 is packaged in an 8-pin SOIC (SO-8) surface-mount package with standard dual-opamp pinout and JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Output of amplifier A - drives external load or feedback network; rail-to-rail capable |
| 2 | –In A | Inverting input of amplifier A - high-impedance node (5 TΩ || 4 pF); accepts signals up to 300 mV beyond rails |
| 3 | +In A | Non-inverting input of amplifier A - same impedance and rail extension as Pin 2 |
| 4 | V– | Negative supply pin - connects to ground (single supply) or negative rail (dual supply); bypass with 1 µF + 1000 pF |
| 5 | +In B | Non-inverting input of amplifier B - electrically identical to Pin 3; independent channel |
| 6 | –In B | Inverting input of amplifier B - identical to Pin 2; supports separate feedback paths per channel |
| 7 | Out B | Output of amplifier B - fully independent output; shares no internal nodes with Out A |
| 8 | V+ | Positive supply pin - accepts 4 V to 12 V (single) or ±2 V to ±6 V (dual); requires local decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables direct interfacing with 3.3 V ADCs and DACs without level-shifting circuitry |
| 160 µA per amplifier quiescent current | Supports always-on battery-powered monitoring nodes with multi-year runtime on CR2032 cells |
| 1 pA input bias current | Permits use with >1 GΩ source impedances (e.g., piezoelectric sensors, ion-selective electrodes) |
| Unity-gain stable architecture | Eliminates need for external compensation in buffer, gain-of-1, or low-gain configurations |
| –40°C to +85°C guaranteed operation | Validates performance in automotive cabin and industrial control environments without derating |
Applications
| Automotive Cabin Sensors | Portable Data Acquisition |
|---|---|
|
Use Scenario: Signal conditioning for analog outputs of MEMS accelerometers and humidity sensors in vehicle infotainment and ADAS modules. IC Role / Device Role / Timing Role: Dual-channel rail-to-rail op amp providing buffered, low-noise amplification and level shifting before 12-bit SAR ADC sampling. Use Value: 1 pA input bias prevents drift in high-impedance sensor bridges; 160 µA/channel enables thermal management in sealed enclosures. |
Use Scenario: Front-end amplification for handheld multimeters and portable oscilloscope probes with 10 MΩ input impedance. IC Role / Device Role / Timing Role: Dual op amp configured as precision non-inverting amplifier (G = 10) and reference buffer for internal DAC. Use Value: 90 dB CMRR rejects common-mode noise from shared battery rails; rail-to-rail output maximizes display resolution on 3.3 V LCD drivers. |
| Active Filter for Audio Monitoring | Transducer Interface in Test Equipment |
|
Use Scenario: 2nd-order Sallen-Key low-pass filter (fc = 20 kHz) in battery-powered audio spectrum analyzers. IC Role / Device Role / Timing Role: Dual op amp implementing filter topology with one section as integrator and second as gain stage. Use Value: 1 MHz GBW ensures <1% group delay variation across audio band; 0.6 V/µs slew rate avoids clipping on 2 Vpp signals. |
Use Scenario: Amplifying low-level signals from strain gauges and thermocouples in benchtop calibration instruments. IC Role / Device Role / Timing Role: Instrumentation-grade dual op amp used in 3-op-amp INA configuration with matched external resistors. Use Value: ±160 µV offset minimizes zero-error in 100 µV full-scale measurements; 45 nV/√Hz voltage noise supports sub-16-bit ENOB. |
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 | Chopper-stabilized (0.02 µV/°C drift), 350 µA IQ, 350 kHz GBW, SOIC-8 | Better DC precision but lower speed; unsuitable for >100 kHz signal paths | Select when offset drift dominates error budget over bandwidth requirements |
| MCP6022-I/SN | 10 µA IQ, 10 MHz GBW, 7 V/µs SR, SOIC-8, rail-to-rail I/O | Higher power, faster response, less suitable for ultra-low-power designs | Select when system demands higher slew rate and can accommodate 60× higher quiescent current |
Compared with OPA2703UA/2K5, OPA2333AIDR trades bandwidth for nanovolt-level drift stability, while MCP6022-I/SN sacrifices quiescent efficiency for 10× higher speed-making OPA2703UA/2K5 optimal for battery-constrained, medium-speed precision sensing where 1 MHz GBW and 160 µA IQ are critical design anchors.
Availability
OPA2703UA/2K5 is available at Aetrix Electronics and suitable for automotive cabin sensors, portable data acquisition systems, and active filter designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant SOIC-8 packaging.
Supply support for OPA2703UA/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 amps and signal chain solutions.
The OPA2703 series belongs to TI's precision CMOS op amp product line, designed specifically for low-power, rail-to-rail signal conditioning in space- and energy-constrained applications such as portable instrumentation and automotive subsystems.
FAQ
What is the maximum capacitive load the OPA2703UA/2K5 can drive stably?
The OPA2703UA/2K5 can drive up to 1000 pF of pure capacitive load while maintaining stability in unity-gain configuration. For loads exceeding 100 pF, 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 verified in the "Small-Signal Overshoot vs Capacitive Load" curve of the SBOS180A datasheet.
Does the OPA2703UA/2K5 exhibit phase inversion when inputs exceed the supply rails?
No, the OPA2703UA/2K5 does not exhibit phase inversion when inputs extend beyond the supply rails-as long as input current is limited to ≤10 mA using a series resistor. This is confirmed in Figure 4 of the SBOS180A datasheet and enabled by ESD diode clamping and robust complementary input stage design.
What is the minimum recommended supply voltage for reliable operation of the OPA2703UA/2K5?
The OPA2703UA/2K5 is fully specified and guaranteed from ±2 V (dual) or 4 V (single) supply. Operation below ±2 V may result in degraded rail-to-rail swing, reduced open-loop gain, and increased input offset voltage-parameters not characterized or warranted outside the datasheet's specified range.
Can the OPA2703UA/2K5 be used in a single-supply 3.3 V system?
Yes, the OPA2703UA/2K5 supports single-supply operation down to 4 V, so it is not rated for 3.3 V operation. For 3.3 V systems, consider the OPA2314 or OPA2376 families, which are explicitly characterized at 2.7 V to 5.5 V. Using OPA2703UA/2K5 at 3.3 V violates its absolute minimum supply specification and risks parametric failure.
How does the OPA2703UA/2K5 differ from the OPA2704UA/2K5 in practical design?
The OPA2703UA/2K5 is unity-gain stable with 1 MHz GBW and 0.6 V/µs slew rate, while the OPA2704UA/2K5 is optimized for gains ≥5, offering 3 MHz GBW and 3 V/µs slew rate-but is not unity-gain stable. Substituting OPA2704UA/2K5 in a unity-gain buffer will cause oscillation; OPA2703UA/2K5 must be used where G = 1 or G = 2 is required.
OPA2703UA/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:
- 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/2K5 FAQ
1.How can I place an order for OPA2703UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2703UA/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 OPA2703UA/2K5 reliable?
The price and inventory of OPA2703UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2703UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA2703UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2703UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2703UA/2K5?
OPA2703UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2703UA/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 OPA2703UA/2K5?
For technical support, including OPA2703UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2703UA/2K5 requirements.
6.How does Aetrix verify that OPA2703UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA2703UA/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 OPA2703UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA2703UA/2K5?
All OPA2703UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2703UA/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 OPA2703UA/2K5 part is unused and in its original packaging.
Return procedure for OPA2703UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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