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Texas Instruments OPA4703EA/250G4
- Part No.:
- OPA4703EA/250G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4703EA/250G4.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,131
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Product details
Overview
OPA4703EA/250G4 from Texas Instruments is a quad-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 single supplies (4–12 V) or dual supplies (±2 to ±6 V), and delivers 40 mV output swing from rail into 100 kΩ load - ideal for low-power sensor signal conditioning in portable instrumentation.
For engineers reviewing the OPA4703EA/250G4 datasheet, OPA4703EA/250G4 pinout, OPA4703EA/250G4 application, or OPA4703EA/250G4 equivalent, key selection criteria include guaranteed rail-to-rail I/O performance across –40°C to +85°C, 1 pA input bias current, 90 dB full-scale CMRR, 160 µV max input offset voltage, and TSSOP-14 package compatibility with space-constrained mixed-signal PCB layouts.
Technical Context
The OPA4703EA/250G4 implements a complementary differential input stage enabling rail-to-rail common-mode input range extending 300 mV beyond both supply rails, and a class-AB output stage achieving 40 mV rail-to-rail swing at light loads. Its unity-gain stable architecture supports direct use in buffers, active filters, and transducer interfaces without external compensation.
Designed for low-noise, low-distortion operation, it features 45 nV/√Hz input voltage noise density at 1 kHz, 6 µVP-P 0.1–10 Hz noise, and THD+N of 0.02% at 1 kHz (3 VP-P, G = +1), making it suitable for precision data acquisition front-ends where dynamic range preservation is critical under battery-limited power budgets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1 MHz - enables stable unity-gain operation and supports bandwidth-critical signal buffering up to ~800 kHz at G = +1. |
| Slew Rate | 0.6 V/µs - sufficient for settling 5 V steps within 15 µs (0.1%) in unity-gain configuration. |
| Input Offset Voltage | ±160 µV (max) - ensures ≤ 0.8 mV error in 5 V full-scale systems, critical for 12-bit+ ADC driver accuracy. |
| Quiescent Current | 160 µA per amplifier - allows four independent channels to operate below 1 mA total, ideal for always-on sensor nodes. |
| Input Bias Current | ±1 pA (typ) - minimizes voltage error across high-impedance sources (e.g., pH electrodes, photodiodes). |
| CMRR | 90 dB (full-scale) - rejects common-mode interference in noisy industrial or automotive environments. |
| Output Swing | Within 40 mV of rails (RL = 100 kΩ) - maximizes usable dynamic range in 3.3 V or 5 V single-supply systems. |
Pinout & Package
TSSOP-14 surface-mount package (PW), 5.0 mm × 4.4 mm footprint, 0.65 mm pitch, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out D | Amplifier D output - drives external load or feedback network; rail-to-rail capable. |
| 2 | –In D | Inverting input of Amplifier D - accepts differential or single-ended signals with rail-to-rail common-mode range. |
| 3 | +In D | Non-inverting input of Amplifier D - high-impedance node (5 TΩ || 4 pF) for precision sensing. |
| 4 | V– | Negative supply rail - shared by all four amplifiers; must be bypassed with 1 µF tantalum + 1000 pF ceramic. |
| 5 | +In C | Non-inverting input of Amplifier C - electrically isolated from other inputs; supports independent channel routing. |
| 6 | –In C | Inverting input of Amplifier C - matched to Pin 2/11 for consistent AC/DC performance across channels. |
| 7 | Out C | Amplifier C output - identical drive capability and settling behavior as Pin 1. |
| 8 | Out A | Amplifier A output - primary channel for system reference or main signal path; pin 1 and 8 are symmetrical. |
| 9 | –In A | Inverting input of Amplifier A - referenced to same V– (Pin 4) and V+ (Pin 14); no cross-talk with other channels. |
| 10 | +In A | Non-inverting input of Amplifier A - lowest input bias current path; optimal for high-Z source coupling. |
| 11 | V+ | Positive supply rail - shared by all four amplifiers; decoupling required at package edge. |
| 12 | +In B | Non-inverting input of Amplifier B - independently biased; supports multi-channel sensor array interfaces. |
| 13 | –In B | Inverting input of Amplifier B - matched offset and drift characteristics to other inputs (±4 µV/°C max). |
| 14 | Out B | Amplifier B output - fully specified for capacitive load drive up to 1000 pF with optional series resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization in 3.3 V and 5 V systems without level-shifting circuitry. |
| 160 µA per amplifier quiescent current | Supports four-channel analog signal conditioning in battery-powered devices with <1 mA total supply current. |
| 1 pA typical input bias current | Minimizes voltage drop across >100 MΩ sensor impedances, preserving accuracy in electrochemical and piezoelectric applications. |
| Unity-gain stable design | Eliminates need for external compensation components in buffer, filter, and gain-of-one configurations. |
| Specified over –40°C to +85°C | Guarantees parametric performance in automotive cabin, industrial control, and outdoor embedded environments. |
Applications
| Portable Data Loggers | Automotive Cabin Sensors |
|---|---|
|
Use Scenario: Simultaneous acquisition of temperature, humidity, and pressure sensor outputs in handheld environmental monitors. IC Role / Device Role / Timing Role: Quad OPA4703EA/250G4 provides individual rail-to-rail buffering and gain stages for each sensor's analog output prior to multiplexing and ADC sampling. Use Value: 160 µA per amplifier enables continuous 4-channel monitoring for >1 year on a single CR2032 coin cell while maintaining 12-bit effective resolution. |
Use Scenario: Signal conditioning for MEMS accelerometers and cabin air quality sensors in automotive infotainment modules. IC Role / Device Role / Timing Role: OPA4703EA/250G4 acts as anti-aliasing filter driver and DC-level shifter for 16-bit SAR ADCs interfacing with low-output-impedance sensors. Use Value: 90 dB CMRR suppresses ignition noise and CAN bus switching transients, reducing post-processing filtering requirements. |
| Medical Wearable Front-Ends | Industrial Process Transmitters |
|
Use Scenario: Biopotential signal amplification (ECG, EMG) in compact, low-power wearable health monitors. IC Role / Device Role / Timing Role: Each amplifier in OPA4703EA/250G4 configures as high-input-impedance instrumentation stage with 1 pA bias current and 45 nV/√Hz noise density. Use Value: Rail-to-rail output swing preserves SNR when driving ADCs operating from 3.3 V supply, avoiding clipping at signal peaks. |
Use Scenario: 4–20 mA loop-powered transmitter with integrated temperature and pressure sensing for factory automation. IC Role / Device Role / Timing Role: OPA4703EA/250G4 conditions sensor outputs and drives precision voltage-to-current conversion circuitry with minimal headroom loss. Use Value: 40 mV output swing from rail allows full 0–5 V DAC output utilization in 5 V loop supply, maximizing current resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4703UA | SO-14 package (5.0 mm × 6.2 mm), 50-piece tube packaging, identical electrical specs and temperature range. | Preferred for prototyping and low-volume manual assembly due to larger SOIC footprint and through-hole-compatible lead form. | Select OPA4703UA when board real estate permits and hand-soldering or socket-based validation is required. |
| TLV2474IDR | Lower GBW (2.8 MHz), higher IQ (600 µA per amp), 3 mV max VOS, same TSSOP-14 package and rail-to-rail I/O. | Better suited for higher-speed, lower-precision applications where power budget allows >2× current draw. | Choose TLV2474IDR only if bandwidth >1 MHz is mandatory and 160 µA constraint is relaxed. |
Compared with OPA4703UA, the OPA4703EA/250G4 offers identical performance in a smaller TSSOP-14 footprint optimized for automated SMT production, while TLV2474IDR trades quiescent current for speed - neither is pin-compatible, but both serve overlapping low-voltage, rail-to-rail signal chain roles.
Availability
OPA4703EA/250G4 is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin electronics, and industrial process transmitters requiring stable component supply with guaranteed long-term manufacturability and RoHS-compliant sourcing.
Supply support for OPA4703EA/250G4 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 OPA703/OPA704 family - including OPA4703EA/250G4 - was designed specifically for low-power, rail-to-rail signal conditioning in battery-operated and space-constrained systems where unity-gain stability, microamp quiescent current, and high CMRR are essential.
FAQ
What is the maximum capacitive load the OPA4703EA/250G4 can drive while maintaining stability?
The OPA4703EA/250G4 is characterized to drive up to 1000 pF of pure capacitive load in unity-gain configuration. For loads exceeding 100 pF, adding a 10 Ω to 20 Ω series resistor inside the feedback loop improves phase margin and reduces overshoot without affecting DC accuracy. This capability is confirmed in the "Small-Signal Overshoot vs Capacitive Load" curve on page 8 of the SBOS180A datasheet.
Does the OPA4703EA/250G4 exhibit phase inversion when input voltages exceed the supply rails?
No, the OPA4703EA/250G4 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 explicitly verified in Figure 4 of the SBOS180A datasheet and results from its complementary input stage architecture, which maintains correct polarity even during overvoltage transients.
What is the thermal resistance (θJA) of the OPA4703EA/250G4 in its TSSOP-14 package?
The junction-to-ambient thermal resistance (θJA) for the OPA4703EA/250G4 in the TSSOP-14 (PW) package is 100°C/W, as specified in the "Thermal Resistance" table on page 4 of the SBOS180A datasheet. This value assumes standard JEDEC 2-layer board conditions and confirms suitability for operation up to +85°C ambient without forced airflow.
Can the OPA4703EA/250G4 operate from a single 3.3 V supply?
The OPA4703EA/250G4 is not specified for reliable operation at 3.3 V. Its minimum single-supply voltage is 4 V, and absolute maximum ratings define (V+) – (V–) ≤ 13.2 V. Operation below 4 V risks degraded CMRR, increased offset drift, and potential instability - confirmed by the "Specified Voltage Range" entry in the Electrical Characteristics tables on pages 3–4 of SBOS180A.
How does the OPA4703EA/250G4 differ from the OPA4704EA/250G4 in terms of gain configuration?
The OPA4703EA/250G4 is unity-gain stable and optimized for G = +1 applications (1 MHz GBW, 0.6 V/µs SR), whereas the OPA4704EA/250G4 is optimized for gains ≥5 (3 MHz GBW, 3 V/µs SR) and is not unity-gain stable. Using OPA4704EA/250G4 at G = +1 may cause oscillation, while OPA4703EA/250G4 delivers full performance at G = +1 without compensation - as detailed in the Applications Information section on page 10 of SBOS180A.
OPA4703EA/250G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- 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 (x4 Channels)
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
OPA4703EA/250G4 FAQ
1.How can I place an order for OPA4703EA/250G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4703EA/250G4 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 OPA4703EA/250G4 reliable?
The price and inventory of OPA4703EA/250G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4703EA/250G4 is usually 5 days.
3.What payment methods are accepted for OPA4703EA/250G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4703EA/250G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4703EA/250G4?
OPA4703EA/250G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4703EA/250G4 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 OPA4703EA/250G4?
For technical support, including OPA4703EA/250G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4703EA/250G4 requirements.
6.How does Aetrix verify that OPA4703EA/250G4 is sourced from the original manufacturer or authorized distributors?
All OPA4703EA/250G4 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 OPA4703EA/250G4 meets industry standards.
7.What is the process for return or replacement of OPA4703EA/250G4?
All OPA4703EA/250G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4703EA/250G4, 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 OPA4703EA/250G4 part is unused and in its original packaging.
Return procedure for OPA4703EA/250G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4703EA/250G4 Tags
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