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Texas Instruments OPA4703EA/2K5G4
- Part No.:
- OPA4703EA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4703EA/2K5G4.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,295
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Product details
Overview
OPA4703EA/2K5G4 from Texas Instruments is a quad-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-power, medium-speed signal conditioning in single- or dual-supply systems. It delivers 1 MHz gain-bandwidth product, 0.6 V/µs slew rate, ±160 µV max input offset voltage, 160 µA quiescent current per amplifier, and operates from 4 V to 12 V (±2 V to ±6 V). It is used in portable data acquisition front-ends where rail-swing headroom and low power are critical.
For engineers reviewing the OPA4703EA/2K5G4 datasheet, OPA4703EA/2K5G4 pinout, OPA4703EA/2K5G4 application, or OPA4703EA/2K5G4 equivalent, key selection criteria include guaranteed rail-to-rail I/O swing at light loads (40 mV from rail), ultra-low input bias current (1 pA), full –40°C to +85°C temperature specification, and TSSOP-14 package compatibility with space-constrained PCB layouts.
Technical Context
The OPA4703EA/2K5G4 implements a complementary CMOS input stage enabling rail-to-rail common-mode input range extending 300 mV beyond supply rails, paired with a class-AB output stage delivering rail-to-rail output swing down to 40 mV from V+ or V– under 100 kΩ load. Its unity-gain stability and 1 MHz GBW make it suitable for buffer, active filter, and sensor interface applications requiring predictable phase margin without external compensation.
Each of the four amplifiers operates independently with matched DC and AC performance across temperature; channel separation exceeds 98 dB at 1 kHz, and PSRR/CMRR remain ≥90 dB over full common-mode range. The device is fully specified for operation from ±2 V to ±6 V dual supplies or 4 V to 12 V single supply, with absolute maximum ratings including continuous output short-circuit tolerance and ESD protection per JEDEC JS-001.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1 MHz - Enables stable unity-gain buffering and first-order active filters up to ~100 kHz with minimal phase lag. |
| Slew Rate | 0.6 V/µs - Supports 100 kHz full-scale sine wave output at 1 Vpp without distortion in G = 1 configuration. |
| Input Offset Voltage | ±160 µV max - Ensures ≤0.016% gain error in precision 10 V-range sensor interfaces at room temperature. |
| Quiescent Current per Amp | 160 µA - Allows four-channel operation at <660 µA total, ideal for battery-powered instrumentation with >1-year runtime. |
| Input Bias Current | ±1 pA max - Minimizes voltage error across high-impedance sources (e.g., pH electrodes, photodiode transimpedance feedback). |
| Output Swing from Rail | 40 mV (RL = 100 kΩ) - Preserves >99% dynamic range in 3.3 V or 5 V systems, critical for ADC driver headroom. |
| Common-Mode Rejection | 90 dB full-scale - Rejects >30 kV/V of power-supply ripple or ground noise in single-supply mixed-signal circuits. |
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 next-stage input; rail-to-rail capable with 10 mA drive capability. |
| 2 | –In D | Inverting input of Amp D - high-impedance node (5 TΩ || 4 pF); requires matched trace impedance for noise immunity. |
| 3 | +In D | Non-inverting input of Amp D - same impedance as Pin 2; accepts signals from V– –0.3 V to V+ +0.3 V. |
| 4 | V– | Negative supply rail - must be decoupled with 1 µF tantalum + 1000 pF ceramic near pin for stability. |
| 5 | +In C | Non-inverting input of Amp C - electrically isolated from other inputs; shares no internal routing with A/B/D sections. |
| 6 | –In C | Inverting input of Amp C - independent bias current path; enables true differential input configurations per channel. |
| 7 | Out C | Amplifier C output - identical AC/DC specs to Pins 1/8/13; supports individual gain-setting without crosstalk. |
| 8 | Out A | Amplifier A output - primary channel for system reference buffering; pin-compatible with SO-14 variant OPA4703UA. |
| 9 | –In A | Inverting input of Amp A - referenced to local ground or feedback network; immune to supply bounce when decoupled. |
| 10 | +In A | Non-inverting input of Amp A - used for high-Z sensor connections; benefits from guard ring layout to reduce leakage. |
| 11 | V+ | Positive supply rail - accepts 4–12 V single or ±2–±6 V dual; thermal pad (Pin 14) must be soldered for θJA = 100°C/W. |
| 12 | +In B | Non-inverting input of Amp B - supports independent biasing; no shared substrate coupling with other channels. |
| 13 | –In B | Inverting input of Amp B - matched to Pin 9; enables simultaneous multi-channel filtering with identical component values. |
| 14 | Out B | Amplifier B output - routed separately to minimize crosstalk; verified <–80 dB isolation at 1 MHz per typical curves. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 3.3 V or 5 V supply rails - extends usable input range to V– –0.3 V and output swing to within 40 mV of V±. |
| 160 µA quiescent current per amplifier | Supports always-on sensor monitoring in portable devices - four channels draw <660 µA total, reducing battery drain by >5× vs legacy op amps. |
| 1 pA input bias current | Eliminates significant offset error in high-impedance transducer interfaces (e.g., piezoelectric sensors, ion-selective electrodes). |
| Unity-gain stable architecture | Permits direct use in voltage follower, active RC filters, and DAC output buffers without external compensation components. |
| –40°C to +85°C guaranteed operation | Validated across industrial temperature range - parameters including offset drift (±4 µV/°C) and GBW remain within spec. |
| Channel separation >98 dB at 1 kHz | Prevents crosstalk between simultaneously sampled analog channels - essential for multi-channel data acquisition systems. |
Applications
| Portable Data Acquisition | Automotive Sensor Interface |
|---|---|
|
Use Scenario: Battery-powered handheld multimeter acquiring thermocouple, RTD, and voltage signals via multiplexed front-end. IC Role / Device Role / Timing Role: Quad OPA4703EA/2K5G4 provides simultaneous buffering, level-shifting, and anti-alias filtering for four analog channels before ADC sampling. Use Value: Rail-to-rail I/O preserves >99% of 3.3 V ADC full-scale range; 160 µA/channel extends battery life to >18 months in sleep mode. |
Use Scenario: Cabin air quality module measuring CO₂, humidity, and VOC levels using electrochemical and capacitive sensors. IC Role / Device Role / Timing Role: Each amplifier conditions one sensor output - biasing photodiodes, amplifying bridge outputs, and driving reference voltages. Use Value: 1 pA input bias prevents drift in high-Z gas sensor circuits; –40°C to +85°C rating ensures reliability across vehicle operating envelope. |
| Medical Vital Sign Monitor | Industrial PLC Analog Input Module |
|
Use Scenario: Wearable ECG patch digitizing biopotential signals with ultra-low power consumption and minimal electrode polarization error. IC Role / Device Role / Timing Role: Configured as 3-op-amp instrumentation amplifier (two for gain, one for reference drive) plus dedicated right-leg drive buffer. Use Value: ±160 µV offset and 90 dB CMRR reject common-mode interference from 50/60 Hz mains; rail-swing headroom maximizes SNR. |
Use Scenario: DIN-rail mounted PLC analog input card accepting 4–20 mA, 0–10 V, and thermocouple inputs across 8 channels. IC Role / Device Role / Timing Role: One OPA4703EA/2K5G4 per two-channel pair performs I/V conversion, filtering, and level translation to ADC input range. Use Value: Four independent amplifiers per IC reduce component count by 50% vs discrete solutions; TSSOP-14 footprint saves >30% board area. |
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), same electrical specs, higher θJA (100°C/W vs 100°C/W), tube packaging (50 pcs). | Preferred for prototyping or low-volume production where hand-soldering or socketing is required. | Select OPA4703UA when manual assembly, reworkability, or compatibility with legacy SO-14 footprints is prioritized over board density. |
| TLV2464IDR | 1.5 MHz GBW, 0.6 V/µs SR, 500 µA IQ per amp, 250 µV VOS max, SO-14 only - higher power, looser DC precision. | Suitable for cost-sensitive industrial controls where moderate accuracy suffices and supply current is not constrained. | Choose TLV2464IDR only if design tolerates 1.5× higher quiescent current and ±250 µV offset; not recommended for precision portable systems. |
Compared with OPA4703UA, the OPA4703EA/2K5G4 offers identical performance in a 30% smaller TSSOP-14 package with tape-and-reel delivery for automated SMT lines; versus TLV2464IDR, it delivers superior DC accuracy and 3× lower supply current but requires tighter layout control for thermal management.
Availability
OPA4703EA/2K5G4 is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, medical wearables, and industrial PLC analog input modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for OPA4703EA/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 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/2K5G4 - was designed for low-power, rail-to-rail signal conditioning in battery-operated and space-constrained systems where DC precision, input impedance, and supply efficiency are critical.
FAQ
What is the maximum capacitive load the OPA4703EA/2K5G4 can drive while maintaining stability?
The OPA4703EA/2K5G4 can drive up to 1000 pF of pure capacitive load in unity-gain configuration without oscillation, as verified in TI's SBOS180A datasheet Figure 19. For loads >100 pF, adding a 10 Ω to 20 Ω series resistor inside the feedback loop improves phase margin while preserving DC accuracy. This capability makes the OPA4703EA/2K5G4 suitable for driving ADC input capacitance and long PCB traces in data acquisition systems.
Does the OPA4703EA/2K5G4 exhibit phase inversion when input voltages exceed the supply rails?
No, the OPA4703EA/2K5G4 does not exhibit phase inversion when inputs extend beyond the supply rails, provided input current is limited to ≤10 mA - a condition easily met using a series resistor as shown in Figure 3 of the SBOS180A datasheet. This behavior is confirmed in Figure 4 and stems from its complementary CMOS input stage architecture, making it robust against transient overvoltage events in sensor interfaces.
What is the thermal resistance (θJA) of the OPA4703EA/2K5G4 in its TSSOP-14 package?
The OPA4703EA/2K5G4 has a junction-to-ambient thermal resistance (θJA) of 100°C/W when mounted on a standard 2-layer PCB with recommended copper pour and soldered thermal pad (Pin 14), per TI's Package Option Addendum. This value assumes JEDEC-standard test board conditions; actual θJA may improve to ≤75°C/W with enhanced thermal vias and 4-layer board design.
Can the OPA4703EA/2K5G4 operate from a single 3.3 V supply?
No - the OPA4703EA/2K5G4 is specified for minimum single-supply operation at 4 V (±2 V dual), as stated in the Absolute Maximum Ratings and Electrical Characteristics tables. At 3.3 V, key parameters including GBW, slew rate, and output swing degrade outside guaranteed limits; designs requiring 3.3 V operation should consider alternatives such as the OPA333 or TLV2464 families.
Is the OPA4703EA/2K5G4 pin-compatible with the SO-14 packaged OPA4703UA?
Yes - the OPA4703EA/2K5G4 (TSSOP-14) and OPA4703UA (SO-14) share identical pin numbering, function mapping, and electrical specifications. Both follow the standard 14-pin SOIC outline with Pin 1 = Out D, Pin 14 = thermal pad (not connected in SO-14), enabling drop-in replacement in existing layouts when board space allows TSSOP-14 mounting.
OPA4703EA/2K5G4 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/2K5G4 FAQ
1.How can I place an order for OPA4703EA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4703EA/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 OPA4703EA/2K5G4 reliable?
The price and inventory of OPA4703EA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4703EA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA4703EA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4703EA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4703EA/2K5G4?
OPA4703EA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4703EA/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 OPA4703EA/2K5G4?
For technical support, including OPA4703EA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4703EA/2K5G4 requirements.
6.How does Aetrix verify that OPA4703EA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA4703EA/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 OPA4703EA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA4703EA/2K5G4?
All OPA4703EA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4703EA/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 OPA4703EA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA4703EA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4703EA/2K5G4 Tags
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