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Texas Instruments OPA4314AIPW
- Part No.:
- OPA4314AIPW
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4314AIPW.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,418
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Product details
Overview
OPA4314AIPW from Texas Instruments is a quad-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, low-power applications. It delivers 3 MHz gain-bandwidth, 1.5 V/µs slew rate, 14 nV/√Hz input voltage noise at 1 kHz, 150 µA per channel quiescent current, and 0.5 mV typical input offset voltage - enabling precision signal conditioning in battery-powered instrumentation and sensor interfaces.
For engineers reviewing the OPA4314AIPW datasheet, OPA4314AIPW pinout, OPA4314AIPW application, or OPA4314AIPW equivalent, this page provides verified technical context, TSSOP-14 package details, real-world use cases in photodiode amplification and active filtering, and validated alternative options for design flexibility and supply continuity.
Technical Context
The OPA4314AIPW integrates four independent unity-gain-stable op-amps with complementary differential input stages enabling rail-to-rail common-mode operation (–0.2 V to VS – 1.3 V), Class AB output stage driving ≥10 kΩ loads, and integrated RF/EMI rejection filter improving immunity above 10 MHz. Its 3-MHz GBW supports stable closed-loop configurations up to G = +10 at 5.5 V supply.
Designed for single-supply systems down to 1.8 V (±0.9 V), it maintains specified performance across –40°C to +125°C, with 4-kV HBM ESD rating and no phase reversal under overdrive - critical for robust sensing front-ends and portable medical devices where supply headroom and reliability are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 3 MHz - enables stable amplification of signals up to ~300 kHz at G = 10 without peaking or instability. |
| Quiescent Current | 150 µA per channel - allows four amplifiers to operate continuously on <1 mA total supply current at 5 V. |
| Input Offset Voltage | 0.5 mV (typ) - ensures ≤0.5% error in 1-V full-scale DC-coupled sensor outputs without trimming. |
| Input Voltage Noise | 14 nV/√Hz at 1 kHz - preserves SNR in low-level photodiode or thermopile amplifier stages. |
| Supply Range | 1.8 V to 5.5 V - supports direct interface with Li-ion, coin-cell, and 3.3-V/5-V system rails. |
| Output Swing | Rail-to-rail - delivers >99% of supply range into 10 kΩ, maximizing dynamic range for ADC drivers. |
| Input Bias Current | 0.2 pA (typ) - permits use with MΩ-level source impedances (e.g., pH electrodes, piezoresistive sensors). |
Pinout & Package
TSSOP-14 package (5.00 mm × 4.40 mm body size) with exposed thermal pad connected to V– for improved thermal performance and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A | Noninverting input, Channel A | Accepts signal referenced to ground or mid-supply; supports rail-to-rail common-mode range. |
| –IN A | Inverting input, Channel A | Used in inverting configurations; matched to +IN A for common-mode rejection. |
| OUT A | Output, Channel A | Drives loads ≥10 kΩ rail-to-rail; stable with ≤300 pF capacitive load. |
| V+ | Positive supply | Connects to main system rail (1.8–5.5 V); requires local 0.01-µF ceramic bypass. |
| V– | Negative supply / Ground reference | Reference node for all channels; thermal pad must be soldered to PCB ground plane. |
| +IN B / –IN B / OUT B | Inputs/Output, Channel B | Electrically isolated from Channel A; identical AC/DC specs and layout rules apply. |
| +IN C / –IN C / OUT C | Inputs/Output, Channel C | Independent channel with same biasing, noise, and drive capability as A/B. |
| +IN D / –IN D / OUT D | Inputs/Output, Channel D | Fourth channel; all four share V+ and V–, enabling compact multi-stage analog signal chains. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 1.8-V supply in single-ended sensor interfaces and ADC driver stages. |
| Integrated RF/EMI filter | Rejects >60 dB of interference at 100 MHz (EMIRR IN+ = 70 dB at 100 MHz), reducing external filtering needs. |
| No phase reversal on overdrive | Prevents latch-up or uncontrolled output swing when inputs exceed common-mode range - critical for fault-tolerant designs. |
| Unity-gain stability | Operates stably with gain = 1 and ≤300 pF capacitive load, simplifying buffer and I/V converter layouts. |
| Extended temperature range | Specified from –40°C to +125°C - suitable for automotive cabin modules and industrial field transmitters. |
Applications
| Photodiode Amplifier | Active Low-Pass Filter |
|---|---|
Use Scenario: Converting weak current from a silicon photodiode (nA–µA range) into a stable, low-noise voltage signal for optical smoke detection. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with 10-MΩ feedback resistor, leveraging 0.2-pA input bias current and 14-nV/√Hz noise floor. Use Value: Enables >100-dB dynamic range in battery-operated detectors without external chopper stabilization. |
Use Scenario: Anti-aliasing filtering before a 1-MSPS SAR ADC in portable data loggers measuring vibration or temperature. IC Role / Device Role / Timing Role: 2nd-order Sallen-Key low-pass stage with 100-kHz cutoff, using two OPA4314AIPW channels per filter. Use Value: Achieves <–60 dB stopband attenuation at 500 kHz while consuming only 600 µA total supply current. |
| Remote Sensor Signal Conditioning | Handheld Test Equipment Front-End |
Use Scenario: Amplifying and level-shifting millivolt-level thermocouple or strain gauge outputs over long cables in building automation nodes. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end (gain = 100) with rail-to-rail output driving ADC reference. Use Value: Maintains 0.1% gain accuracy across –25°C to +70°C ambient using 0.5-mV offset and 1-µV/°C drift. |
Use Scenario: Input buffer and programmable gain stage in handheld multimeters supporting µV-resolution DC voltage measurement. IC Role / Device Role / Timing Role: High-Z unity-gain buffer followed by selectable-gain amplifier, exploiting 150-µA/channel ultra-low IQ. Use Value: Extends battery life to >200 hours on two AA cells while preserving 16-bit effective resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4322AIPW | Higher GBW (20 MHz), higher IQ (1.8 mA/ch), same TSSOP-14 package | Better for high-speed active filters or fast-settling multiplexed sensor arrays | Select when bandwidth >5 MHz is required and power budget allows ≥7× higher supply current. |
| MCP6004-I/P | Lower GBW (1 MHz), lower IQ (100 µA/ch), PDIP-14 package (not surface-mount) | Cost-sensitive, non-automotive consumer applications with relaxed speed/noise requirements | Choose for legacy through-hole assembly or where 1-MHz GBW suffices and RoHS exemption applies. |
Compared with OPA4314AIPW, OPA4322AIPW trades 7× higher quiescent current for 6.7× greater bandwidth and improved slew rate, while MCP6004-I/P offers lower cost and power but sacrifices noise performance, offset voltage, and surface-mount compatibility.
Availability
OPA4314AIPW is available at Aetrix Electronics and suitable for battery-powered instruments, photodiode amplifiers, and active filters requiring stable component supply, extended temperature support, and consistent parametric performance across production lots.
Supply support for OPA4314AIPW 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 low-power signal chain solutions.
The OPAx314 family was designed specifically for cost-sensitive, battery-operated applications demanding rail-to-rail operation, low noise, and wide supply range - targeting portable medical devices, wireless sensors, and handheld test equipment.
FAQ
What is the maximum capacitive load the OPA4314AIPW can drive while remaining stable?
The OPA4314AIPW is unity-gain stable with capacitive loads up to 300 pF, as confirmed in the datasheet's Small-Signal Overshoot vs Load Capacitance plot (Figure 20). Driving larger loads requires isolation resistors or compensation networks. This capability simplifies direct connection to ADC input capacitance or long PCB traces without external stability components - a key advantage of the OPA4314AIPW in compact sensor signal chains.
Does the OPA4314AIPW support true rail-to-rail input at 1.8-V supply?
Yes - the OPA4314AIPW guarantees rail-to-rail input operation from (V–) – 0.2 V to (V+) – 1.3 V across its full 1.8-V to 5.5-V supply range. At 1.8 V, this means the input common-mode range extends from –0.2 V to +0.5 V, fully covering ground-referenced signals and enabling single-supply operation in ultra-low-voltage systems. This specification is validated over temperature and process corners per the Electrical Characteristics table.
How does the integrated RF/EMI filter in the OPA4314AIPW improve system-level immunity?
The OPA4314AIPW includes an internal RF/EMI rejection filter that achieves >70 dB EMIRR (Electromagnetic Interference Rejection Ratio) at 100 MHz, as shown in Figure 32 of the datasheet. This suppresses high-frequency noise coupling into the noninverting input - critical in environments with GSM, Wi-Fi, or switching power supply emissions. It reduces or eliminates the need for external RC filters, saving board space and preserving signal integrity in wireless metering and portable medical devices using the OPA4314AIPW.
Can the OPA4314AIPW be used in dual-supply configurations like ±2.75 V?
Yes - the OPA4314AIPW is fully specified for symmetric dual supplies up to ±2.75 V (total 5.5 V), matching its 1.8-V to 5.5-V single-supply range. The datasheet explicitly lists "±0.9 V" and "±2.75 V" in Recommended Operating Conditions (Section 6.3), and all key specs - including input voltage range, output swing, and noise - are characterized under dual-supply conditions. This makes the OPA4314AIPW suitable for legacy industrial signal conditioning where bipolar rails are standard.
What is the thermal resistance (RθJA) of the OPA4314AIPW in its TSSOP-14 package?
The OPA4314AIPW in the PW (TSSOP-14) package has a junction-to-ambient thermal resistance (RθJA) of 121°C/W, as documented in Section 6.6 of the datasheet. This value assumes standard JEDEC 2-layer board conditions. With its exposed thermal pad tied to V– and PCB ground plane, actual thermal performance improves significantly - RθJB (junction-to-board) is 62.8°C/W - enabling reliable operation at full spec over –40°C to +125°C ambient without forced airflow or heatsinking.
OPA4314AIPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.5V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 150µA (x4 Channels)
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
OPA4314AIPW FAQ
1.How can I place an order for OPA4314AIPW through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4314AIPW 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 OPA4314AIPW reliable?
The price and inventory of OPA4314AIPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4314AIPW is usually 5 days.
3.What payment methods are accepted for OPA4314AIPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4314AIPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4314AIPW?
OPA4314AIPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4314AIPW 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 OPA4314AIPW?
For technical support, including OPA4314AIPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4314AIPW requirements.
6.How does Aetrix verify that OPA4314AIPW is sourced from the original manufacturer or authorized distributors?
All OPA4314AIPW 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 OPA4314AIPW meets industry standards.
7.What is the process for return or replacement of OPA4314AIPW?
All OPA4314AIPW units undergo pre-shipment inspection (PSI). If there is an issue with OPA4314AIPW, 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 OPA4314AIPW part is unused and in its original packaging.
Return procedure for OPA4314AIPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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