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Texas Instruments OPA4314AIPWR
- Part No.:
- OPA4314AIPWR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4314AIPWR.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:14,159
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Product details
Overview
OPA4314AIPWR 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 OPA4314AIPWR datasheet, OPA4314AIPWR pinout, OPA4314AIPWR application, or OPA4314AIPWR equivalent, this page provides verified technical context, TSSOP-14 package details, real-world application mappings, and validated alternative options for design-in and supply continuity planning.
Technical Context
The OPA4314AIPWR integrates four independent unity-gain-stable amplifiers 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 filtering. Its 3 MHz GBW and 1.5 V/µs slew rate support stable closed-loop operation up to G = +10 at 1.8 V supply.
Designed for extended temperature operation (–40°C to +125°C), it features 0.2 pA typical input bias current, 78–92 dB PSRR, 75–96 dB CMRR, and no phase reversal under overdrive - making it suitable for high-impedance photodiode amplification and remote sensing where DC accuracy and EMI immunity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 3 MHz at VS = 5 V, RL = 10 kΩ - supports stable unity-gain and G = +10 configurations up to ~300 kHz. |
| Quiescent Current | 150 µA per channel at VS = 5 V - enables multi-amplifier signal chains in energy-constrained systems (e.g., handheld meters). |
| Input Offset Voltage | 0.5 mV typical (max 2.5 mV) - ensures <±1 LSB error in 12-bit ADC driver applications with ±2.5 V full-scale range. |
| Input Voltage Noise | 14 nV/√Hz at 1 kHz - preserves SNR in low-level sensor amplification (e.g., thermopile, bridge sensors). |
| Supply Range | 1.8 V to 5.5 V - operates from single-cell Li-ion (3.0 V) or dual alkaline (3.0 V) without regulation, reducing BOM count. |
| Output Swing | Within 15 mV of rails at VS = 1.8 V, RL = 10 kΩ - maximizes dynamic range into low-voltage SAR ADCs. |
| EMI Rejection | ≥60 dB EMIRR at 900 MHz (IN+) - suppresses cellular/GSM interference in wireless metering front-ends. |
Pinout & Package
TSSOP-14 package (5.00 mm × 4.40 mm body, 0.65 mm pitch); exposed thermal pad on underside connected to V– for improved thermal performance (RθJA = 121 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load or ADC input; rail-to-rail swing supports full-scale utilization. |
| 2 | –IN A | Inverting input of Amp A - used in transimpedance or inverting gain configurations; 0.2 pA bias current minimizes error with MΩ feedback. |
| 3 | +IN A | Noninverting input of Amp A - accepts signals from 0.2 V below V– to VS – 1.3 V; enables true single-supply sensor interfacing. |
| 4 | V+ | Positive supply rail - bypass with 0.01 µF ceramic capacitor near pin to maintain stability and PSRR. |
| 5 | +IN B | Noninverting input of Amp B - identical specs to +IN A; supports parallel channel processing (e.g., differential pair + reference buffer). |
| 6 | –IN B | Inverting input of Amp B - matched to –IN A for common-mode rejection in dual-channel active filters. |
| 7 | OUT B | Amplifier B output - electrically isolated from OUT A; allows independent gain/feedback networks per channel. |
| 8 | OUT C | Amplifier C output - enables 3-stage signal chain (e.g., gain → filter → level shift) without external op-amps. |
| 9 | –IN C | Inverting input of Amp C - supports cascaded integrator or programmable-gain amplifier topologies. |
| 10 | +IN C | Noninverting input of Amp C - referenced to same VCM as other channels; maintains inter-channel timing alignment. |
| 11 | V– | Negative supply rail - connects to PCB ground plane and thermal pad; low-impedance return path reduces noise coupling. |
| 12 | +IN D | Noninverting input of Amp D - used for reference buffering or power supply monitoring with high-Z source. |
| 13 | –IN D | Inverting input of Amp D - configured as comparator or precision current sense amplifier with external resistor network. |
| 14 | OUT D | Amplifier D output - final stage output; capable of driving 10 kΩ load while maintaining 3 MHz bandwidth. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Common-mode range extends 200 mV beyond V– and V+ - eliminates level-shifting circuits in 1.8-V systems. |
| Integrated RF/EMI filter | Rejects >60 dB of 900-MHz interference at noninverting input - prevents corruption in wireless metering environments. |
| No phase reversal | Stable output polarity during input overdrive - avoids latch-up or false triggering in sensor fault detection circuits. |
| Low input bias current | 0.2 pA typical - enables accurate amplification of high-impedance sources (e.g., pH electrodes, photodiodes). |
| Extended temperature range | Specified from –40°C to +125°C - supports industrial motor control and automotive cabin electronics deployment. |
| Unity-gain stable | Operates with capacitive loads ≤300 pF - simplifies layout for ADC driver applications without external compensation. |
Applications
| Battery-Powered Instruments | Photodiode Amplifiers |
|---|---|
|
Use Scenario: Portable medical glucose meters and handheld multimeters requiring ultra-low power consumption and high DC accuracy. IC Role / Device Role / Timing Role: Quad amplifier configures as transimpedance preamp, reference buffer, filter stage, and ADC driver - all within one TSSOP-14 footprint. Use Value: 150 µA/ch quiescent current extends battery life >10× vs legacy bipolar op-amps; 0.5 mV VOS ensures <0.02% measurement error at 25 mV full scale. |
Use Scenario: Low-light optical sensing in smoke detectors and spectrophotometers using high-impedance silicon photodiodes. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with 0.2 pA IB minimizes dark-current-induced offset; rail-to-rail output drives 12-bit SAR ADC directly. Use Value: 14 nV/√Hz noise density preserves SNR for sub-nA photocurrents; integrated EMI filter rejects ambient RF interference from switching power supplies. |
| Active Filters | Remote Sensing |
|
Use Scenario: 2nd-order anti-aliasing and reconstruction filters in portable data loggers sampling at 100 kSPS. IC Role / Device Role / Timing Role: Dual-channel configuration implements Sallen-Key topology; third channel buffers reference, fourth drives ADC. Use Value: 3 MHz GBW supports Butterworth filter cutoffs up to 150 kHz with <0.1 dB passband ripple; unity-gain stability eliminates external compensation components. |
Use Scenario: Industrial 4–20 mA loop-powered transmitters monitoring temperature/pressure over 1-km twisted-pair cables. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with matched input pairs; quad layout enables local signal conditioning before current loop modulation. Use Value: 75–96 dB CMRR rejects common-mode noise induced on long cables; 1.8-V minimum supply allows direct connection to loop-powered 3.3-V LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad low-power rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4322AIPWR | Higher GBW (20 MHz), higher IQ (1.8 mA/ch), wider supply (1.8–5.5 V), same TSSOP-14 package | Requires more board area for thermal management; suited for higher-speed active filters but increases power budget | Select when >5× bandwidth is needed and system can accommodate 12× higher quiescent current. |
| MCP6004-E/ST | Lower GBW (1 MHz), lower IQ (1 µA/ch), same rail-to-rail I/O, TSSOP-14, but only 125°C max operating temp | Limited AC performance restricts use to DC-coupled sensor buffers; not recommended for >100-kHz active filters | Select for ultra-low-power (<1 µA/ch) applications where bandwidth <100 kHz suffices and extended temp is not required. |
Compared with OPA4314AIPWR, OPA4322AIPWR trades 12× higher power for 6.7× bandwidth and enhanced slew rate, while MCP6004-E/ST reduces current by 150× at the cost of bandwidth and temperature range - making OPA4314AIPWR the optimal balance for precision, low-power, wide-temp signal conditioning.
Availability
OPA4314AIPWR is available at Aetrix Electronics and suitable for battery-powered instruments, photodiode amplifiers, and active filters requiring stable component supply across industrial, medical, and test equipment programs.
Supply support for OPA4314AIPWR 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 delivering analog and embedded processing solutions, with over 50 years of innovation in precision amplifiers and low-power signal chain ICs.
The OPAx314 family was designed specifically for portable, battery-operated instrumentation requiring rail-to-rail operation, low IQ, and robust EMI immunity - targeting medical, industrial, and consumer sensing applications from 1.8 V systems.
FAQ
What is the maximum capacitive load the OPA4314AIPWR can drive while remaining stable?
The OPA4314AIPWR is unity-gain stable with capacitive loads up to 300 pF, as confirmed in the TI SBOS563G datasheet Section 7.1 and Figure 20. This allows direct connection to ADC inputs and PCB traces without external isolation resistors or compensation networks - critical for maintaining signal integrity in compact, high-density layouts where OPA4314AIPWR serves as an ADC driver.
Does the OPA4314AIPWR support operation from a single 1.8-V supply?
Yes, the OPA4314AIPWR is fully specified and characterized for operation from 1.8 V to 5.5 V, including guaranteed parameters such as input offset voltage, CMRR, and GBW at 1.8 V (see SBOS563G Sections 6.3 and 6.7). Its rail-to-rail input and output enable full dynamic range utilization in 1.8-V systems - a key requirement for modern OPA4314AIPWR deployments in wearables and IoT edge nodes.
How does the integrated RF/EMI filter in the OPA4314AIPWR improve system-level robustness?
The OPA4314AIPWR includes an internal RF/EMI rejection filter that achieves ≥60 dB attenuation at 900 MHz on the noninverting input (Figure 32, SBOS563G), suppressing interference from cellular bands, Wi-Fi harmonics, and switching regulators. This eliminates the need for external RC filters in OPA4314AIPWR-based wireless metering and handheld test equipment, reducing component count and improving reliability without sacrificing bandwidth.
What is the thermal resistance (RθJA) of the OPA4314AIPWR in its TSSOP-14 package?
The OPA4314AIPWR 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 SBOS563G. This value assumes standard JEDEC 2-layer board conditions; thermal performance improves significantly when the exposed thermal pad is soldered to a solid ground plane - a design practice strongly recommended for sustained OPA4314AIPWR operation at ambient temperatures approaching 125°C.
Can the OPA4314AIPWR be used in photodiode transimpedance amplifier (TIA) configurations?
Yes, the OPA4314AIPWR is well-suited for TIA applications due to its 0.2 pA typical input bias current, 14 nV/√Hz input voltage noise, rail-to-rail input (enabling virtual ground at VCM = 0 V), and unity-gain stability. These characteristics minimize dark-current error and preserve SNR for low-level photocurrents - making OPA4314AIPWR a preferred choice for precision optical sensing where low-noise, low-IB, and single-supply operation are essential.
OPA4314AIPWR 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:
- 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
OPA4314AIPWR FAQ
1.How can I place an order for OPA4314AIPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4314AIPWR 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 OPA4314AIPWR reliable?
The price and inventory of OPA4314AIPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4314AIPWR is usually 5 days.
3.What payment methods are accepted for OPA4314AIPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4314AIPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4314AIPWR?
OPA4314AIPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4314AIPWR 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 OPA4314AIPWR?
For technical support, including OPA4314AIPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4314AIPWR requirements.
6.How does Aetrix verify that OPA4314AIPWR is sourced from the original manufacturer or authorized distributors?
All OPA4314AIPWR 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 OPA4314AIPWR meets industry standards.
7.What is the process for return or replacement of OPA4314AIPWR?
All OPA4314AIPWR units undergo pre-shipment inspection (PSI). If there is an issue with OPA4314AIPWR, 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 OPA4314AIPWR part is unused and in its original packaging.
Return procedure for OPA4314AIPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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