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Texas Instruments OPA2703EA/2K5
- Part No.:
- OPA2703EA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2703EA/2K5.pdf
- Description:
- IC CMOS 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,470
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Product details
Overview
OPA2703EA/2K5 from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-power, precision signal conditioning in single- or dual-supply systems. It delivers 1MHz gain-bandwidth, 0.6V/µs slew rate, ±160µV max input offset voltage, 90dB full-scale CMRR, and 160µA quiescent current per amplifier - enabling high-accuracy sensor buffering and portable data acquisition at minimal power.
For engineers reviewing the OPA2703EA/2K5 datasheet, OPA2703EA/2K5 pinout, OPA2703EA/2K5 application, or OPA2703EA/2K5 equivalent, key selection criteria include its MSOP-8 package, unity-gain stability, rail-to-rail swing (within 40mV of rails), low 1pA input bias current, and guaranteed –40°C to +85°C operation - all critical for battery-powered instrumentation and automotive sensor interfaces.
Technical Context
The OPA2703EA/2K5 implements a complementary CMOS input stage enabling rail-to-rail common-mode input range extending 300mV beyond supply rails, with no phase inversion under overvoltage conditions when input current is limited. Its class AB output stage achieves rail-to-rail output swing down to 40mV from V+ or V– under light loads.
Designed for unity-gain stability, it maintains 100dB open-loop gain (RL = 20kΩ) and supports capacitive loads up to 1000pF. The device operates across ±2V to ±6V dual supplies or 4V to 12V single supply, with PSRR and CMRR specified over frequency and temperature to support precision DC-coupled measurement paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1MHz - enables stable unity-gain buffer configurations for anti-aliasing and sensor signal conditioning without peaking. |
| Slew Rate | 0.6V/µs - supports ≤10kHz full-power bandwidth for 10Vpp signals, suitable for medium-speed data acquisition front-ends. |
| Input Offset Voltage | ±160µV max - ensures ≤0.0016% gain error in 10V-range precision measurement circuits without trimming. |
| CMRR | 90dB full-scale - rejects >30,000:1 common-mode interference, critical for bridge sensor amplification in noisy environments. |
| Quiescent Current | 160µA per amplifier - allows dual-channel operation from coin-cell or energy-harvesting sources with <330µW total supply power at ±5V. |
| Rail-to-Rail Output Swing | Within 40mV of rails (RL = 100kΩ) - maximizes dynamic range in 3.3V or 5V systems, preserving ADC utilization efficiency. |
| Input Bias Current | 1pA max - eliminates significant voltage error across high-impedance sources (e.g., pH electrodes, photodiode transimpedance feedback). |
Pinout & Package
OPA2703EA/2K5 is packaged in an 8-pin VSSOP (MSOP-8) with 0.65mm pitch, thermal resistance θJA = 150°C/W, and RoHS-compliant NiPdAu lead finish. It is rated for moisture sensitivity level MSL-2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V− (Amplifier A) | Negative supply pin for Channel A - must be decoupled locally with 1000pF ceramic + 1µF tantalum. |
| 2 | Inverting Input (A) | High-impedance differential input node for Channel A - accepts signals from V− − 0.3V to V+ + 0.3V. |
| 3 | Non-Inverting Input (A) | High-impedance differential input node for Channel A - enables rail-to-rail common-mode range with no phase reversal. |
| 4 | Output (A) | Class AB rail-to-rail output capable of sourcing/sinking ±10mA - drives 20kΩ loads to within 75mV of rails. |
| 5 | Output (B) | Class AB rail-to-rail output for Channel B - electrically isolated from Channel A; channel separation >120dB at 1kHz. |
| 6 | Non-Inverting Input (B) | High-impedance differential input for Channel B - identical performance and voltage range as Pin 3. |
| 7 | Inverting Input (B) | High-impedance differential input for Channel B - matches Pin 2 in bias current (1pA) and noise characteristics. |
| 8 | V+ (Amplifier B) | Positive supply pin shared by both amplifiers - connects to common V+ rail; requires local bypassing. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization in 3.3V/5V systems - input extends 300mV beyond rails, output swings to within 40mV of rails. |
| Low quiescent current (160µA per amp) | Supports always-on sensor monitoring in portable medical devices and IoT edge nodes with multi-year battery life. |
| 1pA max input bias current | Preserves accuracy in high-Z source applications like piezoelectric sensors and electrochemical transducers without guard traces. |
| Unity-gain stable architecture | Eliminates need for external compensation in buffer, active filter, and reference-driving configurations - reduces BOM count and layout area. |
| Guaranteed operation from –40°C to +85°C | Validated for automotive cabin electronics, industrial PLC I/O modules, and outdoor environmental monitoring hardware. |
Applications
| Automotive Cabin Sensors | Portable Data Loggers |
|---|---|
Use Scenario: Amplifying low-level signals from MEMS accelerometers and humidity sensors in vehicle infotainment and ADAS control units. IC Role / Device Role / Timing Role: Dual-channel rail-to-rail op amp providing buffered, low-noise signal conditioning before 16-bit SAR ADC sampling. Use Value: 90dB CMRR rejects ignition noise; 160µA per channel enables continuous monitoring without compromising battery runtime. | Use Scenario: Signal conditioning front-end for multi-channel thermocouple and RTD measurements in handheld field instruments. IC Role / Device Role / Timing Role: Precision dual op amp configured as programmable-gain instrumentation amplifier with matched internal channels. Use Value: ±160µV offset ensures <0.01°C error in Class A RTD measurements; rail-to-rail output maximizes 3.3V ADC input range. |
| Medical Vital Sign Monitors | Industrial Process Transmitters |
Use Scenario: Biopotential signal amplification (ECG, EMG) in battery-powered patient-worn monitors requiring low power and high DC accuracy. IC Role / Device Role / Timing Role: Dual op amp used in first-stage instrumentation amplifier with ultra-low input bias current to avoid electrode polarization errors. Use Value: 1pA input bias prevents DC drift in high-impedance electrode interfaces; 160µA quiescent current extends wearable device battery life to >72 hours. | Use Scenario: 4–20mA loop transmitter signal conditioning and voltage reference buffering in hazardous-area process controllers. IC Role / Device Role / Timing Role: Dual op amp driving precision DAC references and isolating analog sensor inputs from microcontroller ADCs. Use Value: Guaranteed –40°C to +85°C operation ensures reliability in oil/gas field cabinets; rail-to-rail swing maintains 12-bit linearity over full 24V loop supply range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Zero-drift architecture; 0.02µV/°C offset drift vs. OPA2703EA/2K5's ±4µV/°C; higher 350µA IQ; 350kHz GBW | Better for µV-level DC stability over temperature; less suitable for >10kHz AC-coupled sensor signals due to lower bandwidth | Select OPA2333AIDR when long-term DC accuracy dominates over speed and power; choose OPA2703EA/2K5 for balanced 1MHz/160µA/±160µV performance. |
| MCP6022-E/SN | Higher 10µA input bias current; 10MHz GBW; 2.5V/µs slew rate; wider 2.7–6V supply range; not specified beyond ±6V | Better for high-speed filtering but unsuitable for pA-level source impedance; lacks guaranteed operation above +85°C | Choose MCP6022-E/SN only for non-automotive, room-temperature, high-speed applications; OPA2703EA/2K5 remains preferred for automotive, industrial, and ultra-low-bias designs. |
Compared with OPA2333AIDR and MCP6022-E/SN, OPA2703EA/2K5 uniquely balances 1MHz bandwidth, 160µA per amplifier, ±160µV offset, and 1pA bias current in an industrial-temperature-rated MSOP-8 package - making it optimal for cost-sensitive, battery-powered precision analog front-ends where zero-drift overhead is unnecessary.
Availability
OPA2703EA/2K5 is available at Aetrix Electronics and suitable for automotive cabin electronics, portable data loggers, and industrial process transmitters requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for OPA2703EA/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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The OPA703/2703/4703 family was designed specifically for low-power, rail-to-rail precision signal conditioning in space-constrained, battery-operated, and automotive-sensor applications - emphasizing quiescent current efficiency without sacrificing DC accuracy or AC performance.
FAQ
What is the maximum capacitive load the OPA2703EA/2K5 can drive while maintaining stability?
The OPA2703EA/2K5 can drive up to 1000pF of pure capacitive load in unity-gain configuration without external compensation. For loads exceeding 100pF, inserting a 10Ω–20Ω series resistor inside the feedback loop improves phase margin and reduces ringing. This capability supports direct interfacing with ADC input capacitance and long PCB traces in compact layouts.
Does the OPA2703EA/2K5 support single-supply operation, and what is its minimum operating voltage?
Yes, the OPA2703EA/2K5 supports true single-supply operation from 4V to 12V. Its specified operating range begins at 4V (±2V dual), with functional operation down to 3.6V. This enables reliable use in 3.3V system domains when powered from regulated 4V rails or boosted supplies - critical for compatibility with modern low-voltage microcontrollers and ADCs.
Is the OPA2703EA/2K5 pin-compatible with other devices in the OPA703 family?
No - the OPA2703EA/2K5 uses an MSOP-8 (VSSOP) package with a specific dual-amplifier pinout (Pins 1/V−, 2/−InA, 3/+InA, 4/OutA, 5/OutB, 6/+InB, 7/−InB, 8/V+). It is not pin-compatible with SO-8 versions (OPA2703UA) due to differing pin assignments, nor with SOT23-5 or TSSOP-14 variants. Board redesign is required when substituting between package types.
What is the typical input voltage noise density of the OPA2703EA/2K5 at 1kHz?
The typical input voltage noise density of the OPA2703EA/2K5 at 1kHz is 45nV/√Hz. This value, combined with its 1pA input bias current and 1MHz bandwidth, results in low-noise performance suitable for amplifying microvolt-level sensor outputs - such as thermopiles and strain gauges - without dominating the system noise floor.
How does the OPA2703EA/2K5 handle input voltages that exceed the supply rails?
The OPA2703EA/2K5 features ESD diodes that conduct when inputs exceed V+ or fall below V− by >300mV. If current is limited to ≤10mA (e.g., via series resistor), the device tolerates such overvoltage without damage or phase inversion - a key reliability feature for interfacing with unconditioned transducer outputs or hot-plug signals in industrial environments.
OPA2703EA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-VSSOP
OPA2703EA/2K5 FAQ
1.How can I place an order for OPA2703EA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2703EA/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 OPA2703EA/2K5 reliable?
The price and inventory of OPA2703EA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2703EA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA2703EA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2703EA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2703EA/2K5?
OPA2703EA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2703EA/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 OPA2703EA/2K5?
For technical support, including OPA2703EA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2703EA/2K5 requirements.
6.How does Aetrix verify that OPA2703EA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA2703EA/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 OPA2703EA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA2703EA/2K5?
All OPA2703EA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2703EA/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 OPA2703EA/2K5 part is unused and in its original packaging.
Return procedure for OPA2703EA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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