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Texas Instruments OPA4703EA/2K5
- Part No.:
- OPA4703EA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4703EA/2K5.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,012
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Product details
Overview
OPA4703EA/2K5 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 rail-to-rail output swing into high-impedance loads - ideal for portable data acquisition front-ends and low-power sensor signal conditioning.
For engineers reviewing the OPA4703EA/2K5 datasheet, OPA4703EA/2K5 pinout, OPA4703EA/2K5 application, or OPA4703EA/2K5 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, and TSSOP-14 packaging with validated 14-pin terminal mapping for multi-amplifier layout efficiency.
Technical Context
The OPA4703EA/2K5 implements a complementary differential input stage enabling rail-to-rail common-mode input range extending 300 mV beyond supply rails, paired with a class-AB output stage achieving 40 mV output swing to rails under light load. Its unity-gain stable architecture ensures robustness in buffer and gain-of-one configurations without external compensation.
Each of the four amplifiers operates independently with fully specified DC precision (±160 µV offset, ±4 µV/°C drift) and dynamic performance (1 MHz GBW, 15 µs 0.1% settling time at G = +1) over the full industrial temperature range. Input protection diodes clamp signals exceeding rails by >300 mV, requiring ≤10 mA current limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1 MHz - supports stable closed-loop operation up to 100 kHz at G = 10 with adequate phase margin. |
| Slew Rate | 0.6 V/µs - enables clean 10 Vpp output at ≤10 kHz in unity-gain buffer applications. |
| Input Offset Voltage | ±160 µV max - reduces DC error in precision transducer amplification and 16-bit DAC buffering. |
| Quiescent Current | 160 µA per amplifier - allows four-channel operation at <650 µA total, critical for battery-powered systems. |
| Rail-to-Rail Output Swing | 40 mV from rail (RL ≥ 100 kΩ) - preserves >99% of available dynamic range in 3.3 V or 5 V single-supply systems. |
| Common-Mode Rejection | 90 dB full-scale - maintains accuracy when amplifying small differential signals in noisy automotive or industrial environments. |
| Input Bias Current | 1 pA typical - prevents significant voltage drop across high-impedance sources (e.g., pH electrodes, piezoelectric sensors). |
Pinout & Package
TSSOP-14 package (PW), 5.0 mm × 4.4 mm body, 0.65 mm pitch, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out D | Output of fourth amplifier channel; capable of sourcing/sinking ±10 mA into resistive loads. |
| 2 | –In D | Inverting input of fourth amplifier; high-impedance node (5 TΩ || 4 pF) requiring guarded layout. |
| 3 | +In D | Non-inverting input of fourth amplifier; accepts common-mode voltages from (V–) – 0.3 V to (V+) + 0.3 V. |
| 4 | V– | Negative supply rail for all four amplifiers; must be bypassed with 1 µF tantalum + 1000 pF ceramic. |
| 5 | +In C | Non-inverting input of third amplifier; electrically isolated from other inputs but shares V– and V+. |
| 6 | –In C | Inverting input of third amplifier; matched to +In C for optimal common-mode rejection in differential pairs. |
| 7 | Out C | Output of third amplifier channel; identical AC/DC specs to Out D, Out B, and Out A. |
| 8 | Out A | Output of first amplifier channel; pin 8 is standard output location for Channel A in TI quad op-amp TSSOP layouts. |
| 9 | –In A | Inverting input of first amplifier; referenced to same V– as all channels; no internal cross-talk. |
| 10 | +In A | Non-inverting input of first amplifier; used for single-ended or differential input configurations. |
| 11 | V+ | Positive supply rail for all four amplifiers; decoupling required within 1 cm of pin per layout guidelines. |
| 12 | +In B | Non-inverting input of second amplifier; independent biasing enables simultaneous multi-sensor conditioning. |
| 13 | –In B | Inverting input of second amplifier; supports active filtering or programmable gain stages per channel. |
| 14 | Out B | Output of second amplifier channel; fully characterized for capacitive load drive up to 1000 pF. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 3.3 V or 5 V supply rails in single-supply systems without level-shifting circuitry. |
| 160 µA per amplifier quiescent current | Supports always-on sensor monitoring in IoT edge nodes with multi-day battery life on coin cells. |
| 1 pA input bias current | Eliminates measurable error when interfacing with >100 MΩ source impedances like photodiode or electret microphone preamps. |
| Unity-gain stable architecture | Permits direct use as voltage follower without external compensation components, reducing BOM count and board area. |
| Specified –40°C to +85°C operation | Validated performance across automotive cabin and industrial control ambient conditions without derating. |
| ESD-protected inputs (HBM >2 kV) | Withstands handling and system-level transients without external TVS diodes in non-critical environments. |
Applications
| Portable Data Acquisition | Automotive Cabin Sensors |
|---|---|
|
Use Scenario: Signal conditioning for 16-bit SAR ADC inputs in handheld test equipment with 3.3 V battery supply. IC Role / Device Role / Timing Role: Quad-channel buffer and gain stage isolating ADC input capacitance while preserving DC accuracy and bandwidth. Use Value: 40 mV rail-to-rail output swing maximizes SNR by delivering >3.2 Vpp full-scale signal to ADC; 160 µA/channel minimizes battery drain during continuous sampling. |
Use Scenario: Amplifying low-level outputs from MEMS pressure and humidity sensors in vehicle climate control modules. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with rail-to-rail I/O enabling direct interface to 5 V microcontroller ADCs. Use Value: ±160 µV offset and 90 dB CMRR reject engine bay noise; 1 pA bias current prevents loading of high-Z sensor elements. |
| Low-Power Active Filters | Multi-Channel Transducer Interfaces |
|
Use Scenario: 2nd-order Sallen-Key low-pass filter (fc = 10 kHz) in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Dual-op-amp implementation using two channels of OPA4703EA/2K5 for filter topology and gain setting. Use Value: 1 MHz GBW ensures filter response matches theoretical design; 0.6 V/µs slew rate prevents distortion on 10 Vpp filtered signals. |
Use Scenario: Simultaneous conditioning of four thermocouple or strain gauge bridges in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Four independent instrumentation-grade amplifiers providing matched gain, offset, and bandwidth per channel. Use Value: Channel-to-channel isolation >140 dB at 1 kHz prevents crosstalk between sensor inputs; TSSOP-14 footprint saves >40% board area vs. SO-14. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4703UA | SO-14 package (5.0 mm × 6.2 mm), 100 °C/W θJA, tube packaging (50 pcs), identical electrical specs. | Preferred for through-hole prototyping or legacy SOIC-based production lines where reflow compatibility is not required. | Select OPA4703UA when manual assembly, socket testing, or compatibility with existing SO-14 footprints is needed. |
| TLV2474IDR | 1.8–6 V supply range, 2.8 V/µs slew rate, 2.5 MHz GBW, 600 µA IQ per amplifier, SO-14/TSSOP-14 pinout compatible. | Better suited for higher-speed, wider-supply applications where power efficiency is secondary to bandwidth. | Choose TLV2474IDR only if system requires >2 MHz GBW and can accommodate 2.4× higher quiescent current per channel. |
Compared with OPA4703UA, the OPA4703EA/2K5 offers superior thermal performance (100 vs. 150 °C/W θJA) and tape-and-reel logistics for automated SMT placement; versus TLV2474IDR, it delivers 3.75× lower quiescent current at the cost of reduced bandwidth - making it optimal for always-on, battery-constrained, precision-sensing roles.
Availability
OPA4703EA/2K5 is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensing, and low-power industrial data acquisition requiring stable component supply, consistent TSSOP-14 packaging, and guaranteed –40°C to +85°C operation.
Supply support for OPA4703EA/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 OPA703/OPA704 family - including OPA4703EA/2K5 - was designed specifically for ultra-low-power, rail-to-rail precision amplification in space- and energy-constrained systems such as portable medical devices and battery-powered sensors.
FAQ
What is the maximum capacitive load the OPA4703EA/2K5 can drive while maintaining stability?
The OPA4703EA/2K5 is characterized to drive up to 1000 pF of pure capacitive load in unity-gain configuration without oscillation. For loads >100 pF, adding a 10–20 Ω series resistor inside the feedback loop improves phase margin while preserving DC accuracy. This capability makes the OPA4703EA/2K5 suitable for driving ADC input capacitors and long PCB traces in compact layouts.
Does the OPA4703EA/2K5 support single-supply operation below 4 V?
No - the OPA4703EA/2K5 is fully specified and guaranteed only from 4 V to 12 V single supply (or ±2 V to ±6 V dual supply). Operation below 4 V may result in degraded rail-to-rail output swing, increased offset voltage, or failure to meet slew rate and bandwidth specifications. For sub-4 V applications, consider TI's TLVx170 family or similar low-voltage rail-to-rail op amps.
How does the OPA4703EA/2K5 differ from the OPA4704EA/2K5 in practical circuit design?
The OPA4704EA/2K5 is optimized for non-unity gains ≥5, offering 3 MHz GBW and 3 V/µs slew rate - triple the speed of the OPA4703EA/2K5 - but is not unity-gain stable. In contrast, the OPA4703EA/2K5 provides guaranteed unity-gain stability, 1 MHz GBW, and 0.6 V/µs slew rate. Use OPA4703EA/2K5 for buffers, gain-of-one stages, and medium-speed data acquisition; reserve OPA4704EA/2K5 for higher-gain active filters or signal chains where speed outweighs stability flexibility.
Is the OPA4703EA/2K5 pin-compatible with other quad op amps in TSSOP-14 packages?
Yes - the OPA4703EA/2K5 uses the industry-standard TSSOP-14 pinout defined by TI for quad op amps (e.g., same as OPA4340, TLV2474), with V+ on pin 11, V– on pin 4, and channel outputs/inputs arranged in canonical order. However, electrical characteristics (GBW, IQ, offset) differ significantly; direct substitution requires validation of loop stability, bandwidth, and power budget in the target application.
What is the recommended power supply decoupling for the OPA4703EA/2K5 in a 4-layer PCB layout?
TI recommends placing a 1 µF tantalum capacitor and a 1000 pF ceramic capacitor in parallel between V+ (pin 11) and V– (pin 4), located within 1 cm of the OPA4703EA/2K5 package. The ceramic capacitor should be placed closest to the pins. Ground planes on inner layers must be solid and uninterrupted beneath the device to minimize inductance and ensure stable rail-to-rail performance across all four channels of the OPA4703EA/2K5.
OPA4703EA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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/2K5 FAQ
1.How can I place an order for OPA4703EA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4703EA/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 OPA4703EA/2K5 reliable?
The price and inventory of OPA4703EA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4703EA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA4703EA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4703EA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4703EA/2K5?
OPA4703EA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4703EA/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 OPA4703EA/2K5?
For technical support, including OPA4703EA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4703EA/2K5 requirements.
6.How does Aetrix verify that OPA4703EA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA4703EA/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 OPA4703EA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA4703EA/2K5?
All OPA4703EA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4703EA/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 OPA4703EA/2K5 part is unused and in its original packaging.
Return procedure for OPA4703EA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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