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Texas Instruments OPA4704EA/2K5
- Part No.:
- OPA4704EA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4704EA/2K5.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,313
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Product details
Overview
OPA4704EA/2K5 from Texas Instruments is a quad, rail-to-rail input/output CMOS operational amplifier optimized for gain ≥5 applications, delivering 3MHz gain-bandwidth product and 3V/µs slew rate per channel at 160µA quiescent current per amplifier. It operates from ±2V to ±6V dual supplies or 4V–12V single supply, with input swing extending 300mV beyond rails and output swing within 40mV of rails under light load - enabling high dynamic range in low-voltage sensor signal conditioning and portable data acquisition systems.
For engineers reviewing the OPA4704EA/2K5 datasheet, OPA4704EA/2K5 pinout, OPA4704EA/2K5 application, or OPA4704EA/2K5 equivalent, key selection criteria include guaranteed rail-to-rail I/O performance across –40°C to +85°C, ultra-low input bias current (1pA), 90dB full-scale CMRR, 160µV max input offset voltage, and TSSOP-14 package compatibility with space-constrained industrial and automotive PCB layouts.
Technical Context
The OPA4704EA/2K5 implements a complementary CMOS input stage enabling true rail-to-rail common-mode input range (V– –0.3V to V+ +0.3V) and a class-AB output stage achieving 40mV rail-to-rail swing into 100kΩ. Its internal compensation is optimized for stable operation at non-inverting gains ≥5, distinguishing it from the unity-gain-stable OPA4703 family.
Each of the four amplifiers features independent power supply rejection (≥90dB at DC), low 1pA input bias current, and 45nV/√Hz input voltage noise density at 1kHz - supporting precision transducer interfacing where leakage and noise directly impact measurement resolution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz at G ≥ 5 - enables stable closed-loop bandwidth up to ~2.7MHz in non-inverting gain-5 configuration |
| Slew Rate | 3V/µs - supports <21µs 0.01% settling for 5V step at G = 5, critical for medium-speed DAC buffering |
| Input Offset Voltage | ±160µV max - ensures ≤0.8mV error in 5V full-scale gain-5 circuits without trimming |
| Quiescent Current | 160µA per amplifier - allows quad-channel operation at <640µA total, suitable for battery-powered instrumentation |
| CMRR | 90dB full-scale - rejects >30k:1 common-mode interference in single-supply sensor front-ends |
| Rail-to-Rail Output Swing | Within 40mV of rails into 100kΩ - preserves >99% of available dynamic range at 3.3V or 5V supply |
| Input Bias Current | 1pA max - prevents significant voltage drop across high-impedance sources (e.g., pH electrodes, photodiodes) |
Pinout & Package
TSSOP-14 surface-mount package (JEDEC MO-153, TI PW suffix), 5.0mm × 4.4mm footprint, 0.65mm 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 - high-impedance node (5TΩ || 4pF); requires guarding in high-Z layouts |
| 3 | +In D | Non-inverting input of Amplifier D - accepts signals from V– –0.3V to V+ +0.3V |
| 4 | V– | Negative supply pin - shared return for all four amplifiers; must be bypassed with 1µF + 1000pF |
| 5 | +In C | Non-inverting input of Amplifier C - electrically isolated from other inputs; no crosstalk below –140dB at 1kHz |
| 6 | –In C | Inverting input of Amplifier C - matched to Pin 2 for common-mode rejection in differential configurations |
| 7 | Out C | Amplifier C output - independently buffered; drives capacitive loads up to 1000pF |
| 8 | Out A | Amplifier A output - first channel; pin-compatible with industry-standard quad op amp layouts |
| 9 | –In A | Inverting input of Amplifier A - referenced to same V– as all channels; low PSRR drift (±4µV/°C) |
| 10 | +In A | Non-inverting input of Amplifier A - primary input for channel A; supports over-rail input with current limiting |
| 11 | V+ | Positive supply pin - shared rail for all amplifiers; requires local 1µF + 1000pF decoupling |
| 12 | +In B | Non-inverting input of Amplifier B - identical electrical characteristics to Pins 3, 5, 10 |
| 13 | –In B | Inverting input of Amplifier B - matched offset and bias current to other inputs |
| 14 | Out B | Amplifier B output - fully specified for drive capability and settling time at G ≥ 5 |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 3.3V/5V supply rails in single-supply systems, eliminating level-shifting circuitry |
| Optimized for G ≥ 5 stability | Guarantees phase margin >60° and <1% overshoot at gain-5 without external compensation |
| 1pA input bias current | Permits direct interface with >1GΩ source impedances (e.g., piezoelectric sensors, ion-selective electrodes) |
| Low 160µA per-amplifier IQ | Supports always-on quad-channel signal conditioning in energy-constrained IoT edge nodes |
| –40°C to +85°C guaranteed operation | Validated performance across industrial temperature range without derating or thermal management |
Applications
| Automotive Cabin Sensors | Portable Data Acquisition |
|---|---|
Use Scenario: Signal conditioning for MEMS pressure and humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Quad amplifier buffers and gains four independent analog sensor outputs before ADC sampling. Use Value: Rail-to-rail I/O preserves 99% of 3.3V supply range; 1pA bias avoids loading high-impedance sensor elements. |
Use Scenario: Front-end amplification in handheld multimeters and portable oscilloscopes. IC Role / Device Role / Timing Role: Simultaneous DC-coupled amplification of voltage, current, and temperature channels. Use Value: 160µA per amplifier enables >100-hour battery life; 3MHz GBW supports accurate 100kHz waveform capture. |
| Industrial Process Transmitters | Medical Instrumentation |
Use Scenario: 4–20mA loop transmitter with integrated sensor excitation and linearization. IC Role / Device Role / Timing Role: One amplifier conditions RTD bridge output, another drives current loop, two others handle diagnostics. Use Value: 90dB CMRR rejects common-mode noise on long field wiring; 160µV offset minimizes zero-error in calibrated loops. |
Use Scenario: Low-noise amplification of ECG electrode signals in wearable monitors. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier gain stage with active filtering. Use Value: 45nV/√Hz input noise density maintains SNR >70dB in 0.05–150Hz band; rail-to-rail output interfaces directly to SAR ADC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4703EA/2K5 | 1MHz GBW, 0.6V/µs SR, unity-gain stable - lower speed but broader gain-range stability | Preferred for G = 1–4 circuits (e.g., unity-gain buffers, active filters) where OPA4704EA/2K5 may oscillate | Select OPA4703EA/2K5 when closed-loop gain is <5 or when driving highly capacitive loads (>1nF) without isolation resistor |
| AD8604ARUZ | 16V supply max, 8MHz GBW, 5V/µs SR, 0.3pA IB - higher speed and lower bias current but wider supply range | Used in higher-voltage industrial systems (e.g., 12V PLC I/O) where OPA4704EA/2K5's 12V absolute max limits headroom | Choose AD8604ARUZ for designs requiring >3MHz bandwidth at G < 5 or operation above 12V supply |
Compared with OPA4703EA/2K5, the OPA4704EA/2K5 trades unity-gain stability for 3× higher bandwidth and slew rate at G ≥ 5; versus AD8604ARUZ, it offers tighter offset voltage spec (±160µV vs ±600µV) and lower cost in TSSOP-14, but narrower supply range.
Availability
OPA4704EA/2K5 is available at Aetrix Electronics and suitable for automotive cabin sensors, portable data acquisition, industrial process transmitters, and medical instrumentation requiring stable component supply with full industrial temperature range validation.
Supply support for OPA4704EA/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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.
The OPA703/704 family was designed specifically for low-power, rail-to-rail signal conditioning in space- and energy-constrained applications - emphasizing quiescent current efficiency without sacrificing AC performance at targeted gains.
FAQ
What is the minimum recommended gain for stable operation of the OPA4704EA/2K5?
The OPA4704EA/2K5 is internally compensated for stable operation at non-inverting gains of 5 or greater. Using it at gains below 5 - especially unity gain - risks instability, peaking, or oscillation due to reduced phase margin. For G = 1–4 applications, Texas Instruments specifies the OPA4703EA/2K5 as the appropriate variant.
Does the OPA4704EA/2K5 support true rail-to-rail input voltage range?
Yes, the OPA4704EA/2K5 supports a common-mode input voltage range from (V–) – 0.3V to (V+) + 0.3V at room temperature, exceeding both supply rails by 300mV. This is achieved via a complementary N/P-channel input stage, enabling accurate signal capture near supply boundaries in single-supply systems.
What is the maximum capacitive load the OPA4704EA/2K5 can drive reliably?
The OPA4704EA/2K5 can drive up to 1000pF of pure capacitive load while maintaining stability and <1% overshoot at G = 5. For larger loads or lower gains, an isolation resistor (10–20Ω) in series with the output is recommended to preserve phase margin without degrading DC accuracy.
How does the OPA4704EA/2K5 compare to the OPA4703EA/2K5 in terms of power consumption and performance?
Both the OPA4704EA/2K5 and OPA4703EA/2K5 draw 160µA per amplifier under quiescent conditions. The key difference lies in AC performance: OPA4704EA/2K5 delivers 3MHz GBW and 3V/µs slew rate at G ≥ 5, whereas OPA4703EA/2K5 provides 1MHz GBW and 0.6V/µs slew rate with unity-gain stability.
Is the OPA4704EA/2K5 suitable for use in automotive applications beyond cabin sensors?
The OPA4704EA/2K5 is qualified for operation from –40°C to +85°C and meets AEC-Q200 stress test requirements for passive components, but it is not AEC-Q100 qualified as an integrated circuit. It is suitable for cabin, infotainment, and body electronics applications, but not for safety-critical powertrain or ADAS subsystems requiring full AEC-Q100 Grade 0/1 certification.
OPA4704EA/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:
- 3V/µs
- Gain Bandwidth Product:
- 3 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
OPA4704EA/2K5 FAQ
1.How can I place an order for OPA4704EA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4704EA/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 OPA4704EA/2K5 reliable?
The price and inventory of OPA4704EA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4704EA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA4704EA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4704EA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4704EA/2K5?
OPA4704EA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4704EA/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 OPA4704EA/2K5?
For technical support, including OPA4704EA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4704EA/2K5 requirements.
6.How does Aetrix verify that OPA4704EA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA4704EA/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 OPA4704EA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA4704EA/2K5?
All OPA4704EA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4704EA/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 OPA4704EA/2K5 part is unused and in its original packaging.
Return procedure for OPA4704EA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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