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Texas Instruments OPA2314AID
- Part No.:
- OPA2314AID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2314AID.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,453
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Product details
Overview
OPA2314AID from Texas Instruments is a dual-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 OPA2314AID datasheet, OPA2314AID pinout, OPA2314AID application, or OPA2314AID equivalent, this page provides verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for design-in and supply continuity planning.
Technical Context
The OPA2314AID employs a complementary differential input stage enabling rail-to-rail common-mode input range (extending 200 mV beyond both rails), paired with a Class AB output stage capable of driving ≥10 kΩ loads across the full supply range. Its unity-gain stability supports direct use in buffer, active filter, and photodiode transimpedance configurations without external compensation.
Integrated RF/EMI rejection filtering improves immunity to high-frequency interference (EMIRR IN+ > 80 dB up to 100 MHz), while robust overdrive recovery (< 5.2 µs) and no phase reversal under overdrive ensure reliable operation in dynamic sensing environments. Specified from –40°C to +125°C, it maintains 90–115 dB open-loop gain and < 2.5 mV max offset voltage across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 3 MHz - enables stable unity-gain buffering and 2nd-order active filters up to ~300 kHz with minimal phase error. |
| Slew Rate | 1.5 V/µs - supports clean 1-Vpp output at 100 kHz without slewing distortion in single-supply sensor front-ends. |
| Input Voltage Noise | 14 nV/√Hz at 1 kHz - critical for low-level signal amplification in photodiode and strain gauge interfaces. |
| Quiescent Current | 150 µA per channel - allows dual-amplifier operation on coin-cell or energy-harvesting supplies for >1-year battery life. |
| Input Offset Voltage | 0.5 mV (typ), ≤2.5 mV (max) - ensures < 0.1% gain error in 12-bit ADC driver applications with 5 V full-scale range. |
| Supply Voltage Range | 1.8 V to 5.5 V - supports direct interfacing with Li-ion, 2xAA, or 3.3 V/5 V system rails without level-shifting. |
| CMRR / PSRR | 75–96 dB (DC–100 kHz) - rejects power rail ripple and common-mode noise in noisy industrial or portable environments. |
Pinout & Package
OPA2314AID is packaged in an SOIC-8 (D package), 4.90 mm × 3.91 mm body, with exposed thermal pad connected to V– for enhanced thermal performance (RθJA = 138.4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | Accepts signals up to V– – 0.2 V and V+ + 0.2 V; enables true rail-to-rail input operation in single-supply configurations. |
| –IN A (Pin 2) | Inverting input, Channel A | Used for inverting gain stages, transimpedance feedback, or differential input pairs with matched layout. |
| OUT A (Pin 1) | Output, Channel A | Rail-to-rail swing (within 15–40 mV of rails); drives 10 kΩ loads directly into ADC inputs or analog switches. |
| V– (Pin 4) | Negative supply terminal | Reference for all internal biasing; thermal pad must be soldered to PCB ground plane for optimal thermal dissipation. |
| +IN B (Pin 5) | Noninverting input, Channel B | Independent input for dual-path signal processing (e.g., reference buffer + sensor channel). |
| –IN B (Pin 6) | Inverting input, Channel B | Supports independent feedback networks per channel; no crosstalk between channels at DC and low frequencies. |
| OUT B (Pin 7) | Output, Channel B | Matches OUT A performance; enables dual-channel simultaneous sampling or differential output generation. |
| V+ (Pin 8) | Positive supply terminal | Bypass with 0.01 µF ceramic capacitor close to pin to suppress high-frequency supply noise and ensure stability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization in 1.8 V systems - e.g., 0–1.8 V ADC input coverage without external level shifters. |
| Integrated RF/EMI filter | Rejects cellular, Wi-Fi, and Bluetooth interference (EMIRR IN+ > 80 dB @ 900 MHz), eliminating need for external ferrite beads. |
| No phase reversal under overdrive | Prevents latch-up or erroneous control signals when input exceeds rails - essential for fault-tolerant sensor monitoring. |
| Low input bias current (0.2 pA typ) | Minimizes voltage error in MΩ-source applications like pH electrodes, piezoelectric sensors, or high-Z filter networks. |
| Unity-gain stable with 300 pF load | Allows direct connection to long traces or capacitive ADC inputs without isolation resistors or compensation networks. |
Applications
| Photodiode Amplification | Portable Medical Sensors |
|---|---|
|
Use Scenario: Converting weak current from silicon photodiodes (nA–µA range) into stable voltage for 12-bit ADC digitization in pulse oximeters. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with low input bias current and low noise to preserve SNR in low-light conditions. Use Value: 0.2 pA input bias avoids dark-current-induced offset; 14 nV/√Hz noise ensures >80 dB SNR at 100 Hz bandwidth. |
Use Scenario: Signal conditioning for ECG electrode interfaces in handheld cardiac monitors operating on two AA batteries. IC Role / Device Role / Timing Role: Dual-channel amplifier: one channel buffers reference voltage, the other amplifies differential lead-II signal. Use Value: 150 µA/ch quiescent current extends battery life to >18 months; rail-to-rail I/O supports 1.8 V ADC interface without level shifters. |
| Active Low-Pass Filtering | Wireless Metering Front-End |
|
Use Scenario: 2nd-order Sallen-Key low-pass filter (10 kHz cutoff) in battery-powered environmental data loggers measuring temperature/humidity. IC Role / Device Role / Timing Role: Unity-gain stable op-amp implementing filter transfer function with minimal component count and layout area. Use Value: 3 MHz GBW ensures < 0.1 dB passband ripple; 1.5 V/µs slew rate prevents distortion on 1-Vpp filtered outputs. |
Use Scenario: Analog front-end for ultrasonic flow meters in smart water/gas meters, requiring immunity to EMI from switching power supplies and RF modules. IC Role / Device Role / Timing Role: Precision buffer and signal conditioner for analog outputs of MEMS pressure sensors before sigma-delta ADC conversion. Use Value: Integrated EMIRR filter suppresses conducted RF noise from GSM/GPRS transceivers; 125°C rating supports outdoor enclosure operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, low-power, rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6022-I/SN | Higher quiescent current (1 mA/ch), lower GBW (10 MHz), no integrated EMI filter, 2.7–5.5 V supply only. | Better AC performance but unsuitable for sub-2 V or ultra-low-power designs; requires external EMI suppression. | Select when higher speed and drive capability outweigh battery life concerns and EMI environment is controlled. |
| AD8602ARZ | Lower noise (12 nV/√Hz), higher IQ (1 mA/ch), wider offset spec (±1.5 mV), no EMI filter, 2.7–6 V supply. | Superior precision for DC-critical applications but incompatible with 1.8 V systems and less robust in noisy RF environments. | Choose for high-accuracy instrumentation where supply >2.7 V is guaranteed and EMI is not a primary concern. |
Compared with MCP6022-I/SN and AD8602ARZ, OPA2314AID uniquely balances ultra-low power (150 µA/ch), 1.8 V operation, integrated EMI rejection, and rail-to-rail performance - making it the preferred choice for space-constrained, battery-operated, and RF-hostile embedded sensor nodes.
Availability
OPA2314AID is available at Aetrix Electronics and suitable for battery-powered instruments, photodiode amplifiers, and active filters requiring stable component supply across automotive, industrial, and medical OEM programs.
Supply support for OPA2314AID 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 components.
The OPAx314 family was designed specifically for cost-sensitive, battery-powered applications demanding rail-to-rail operation, low noise, and robust EMI immunity - targeting portable test equipment, medical wearables, and wireless sensor nodes.
FAQ
What is the maximum capacitive load OPA2314AID can drive while maintaining stability?
OPA2314AID is unity-gain stable with capacitive loads up to 300 pF, as confirmed in the datasheet's "Stability" section and Figure 20 (Small-Signal Overshoot vs Load Capacitance). This allows direct connection to ADC input capacitors or long PCB traces without isolation resistors. For loads >300 pF, a series resistor (e.g., 10–50 Ω) between the op-amp output and the capacitance restores phase margin.
Does OPA2314AID support true rail-to-rail input when powered from 1.8 V?
Yes. OPA2314AID's input common-mode range extends 200 mV beyond both supply rails - meaning at 1.8 V supply, it accepts inputs from –0.2 V to +2.0 V. This is explicitly verified in Section 6.7 (Electrical Characteristics) under "Input Voltage Range" and Figure 7 (Offset Voltage vs Common-Mode Voltage), ensuring full utilization of the 0–1.8 V range in single-supply systems.
How does the integrated RF/EMI filter in OPA2314AID improve system-level immunity?
The integrated RF/EMI filter in OPA2314AID provides >80 dB rejection of interference at 900 MHz and >60 dB up to 2.4 GHz (per Figure 32), significantly reducing susceptibility to cellular, Wi-Fi, and Bluetooth emissions. This eliminates the need for external RC filters or ferrite beads in compact layouts, preserving signal integrity in wireless metering and portable medical devices without added BOM cost or board area.
Can OPA2314AID operate reliably at 125°C ambient temperature?
Yes. OPA2314AID is fully specified and production-tested over –40°C to +125°C ambient temperature (Section 6.3, Recommended Operating Conditions). Key parameters including offset voltage (≤2.5 mV), CMRR (≥73 dB), and quiescent current (≤220 µA) are characterized across this range, confirming suitability for under-hood automotive sensors, industrial motor controls, and outdoor utility metering.
What is the typical power-on time for OPA2314AID, and why does it matter?
OPA2314AID has a typical power-on time of 44 µs (Section 6.7, Electrical Characteristics), defined as the time from supply ramp to 90% of final quiescent current. This fast wake-up enables rapid enable/disable cycling in duty-cycled sensor systems - e.g., waking every 100 ms for 10 µs measurement windows - minimizing average system power without compromising signal settling.
OPA2314AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.5V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 150µA (x2 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:
- 8-SOIC
OPA2314AID FAQ
1.How can I place an order for OPA2314AID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2314AID 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 OPA2314AID reliable?
The price and inventory of OPA2314AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2314AID is usually 5 days.
3.What payment methods are accepted for OPA2314AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2314AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2314AID?
OPA2314AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2314AID 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 OPA2314AID?
For technical support, including OPA2314AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2314AID requirements.
6.How does Aetrix verify that OPA2314AID is sourced from the original manufacturer or authorized distributors?
All OPA2314AID 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 OPA2314AID meets industry standards.
7.What is the process for return or replacement of OPA2314AID?
All OPA2314AID units undergo pre-shipment inspection (PSI). If there is an issue with OPA2314AID, 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 OPA2314AID part is unused and in its original packaging.
Return procedure for OPA2314AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2314AID Tags
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