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Texas Instruments OPA2314AIDGKR
- Part No.:
- OPA2314AIDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2314AIDGKR.pdf
- Description:
- IC CMOS 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:41,330
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Product details
Overview
OPA2314AIDGKR 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, and 14 nV/√Hz input voltage noise at 1 kHz while consuming only 150 µA per channel at 5 V supply - enabling precision signal conditioning in battery-powered medical sensors and portable instrumentation.
For engineers reviewing the OPA2314AIDGKR datasheet, OPA2314AIDGKR pinout, OPA2314AIDGKR application, or OPA2314AIDGKR equivalent, key selection criteria include its 1.8–5.5 V supply range, 0.2 pA input bias current, –40°C to 125°C extended temperature rating, integrated RF/EMI filter, and unity-gain stability with up to 300 pF capacitive load.
Technical Context
The OPA2314AIDGKR employs a complementary differential input stage (N- and P-channel pairs) enabling rail-to-rail common-mode input range extending 200 mV beyond both supply rails. Its Class AB output stage drives ≥10 kΩ loads across the full supply range without phase reversal during overdrive.
Internal design includes an integrated RF/EMI rejection filter on the noninverting input, delivering >70 dB EMIRR at 900 MHz, and robust ESD protection (±4 kV HBM). The amplifier is unity-gain stable and supports single-supply operation down to 1.8 V (±0.9 V), making it suitable for interfacing directly with SAR ADCs and low-voltage microcontroller analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 3 MHz - enables stable closed-loop operation up to 100 kHz with G = 30, supporting anti-aliasing and sensor signal conditioning. |
| Supply Voltage Range | 1.8 V to 5.5 V - supports direct connection to Li-ion, coin-cell, and 3.3 V/5 V system rails without level-shifting. |
| Quiescent Current | 150 µA per channel - allows continuous operation in always-on wearable sensors with multi-year battery life. |
| Input Offset Voltage | 0.5 mV (typ) - ensures ≤0.01% gain error in 50 mV full-scale medical transducer amplification. |
| Input Bias Current | 0.2 pA - preserves signal integrity in high-impedance photodiode and pH electrode interfaces (>100 MΩ source). |
| Input Voltage Noise | 14 nV/√Hz at 1 kHz - maintains SNR > 86 dB in 20 kHz audio-band active filters and precision instrumentation. |
| Output Swing | Rail-to-rail - delivers full dynamic range into ADCs with 1.8 V reference, maximizing effective resolution. |
Pinout & Package
OPA2314AIDGKR is housed in an 8-pin MSOP (DGK) package measuring 3.0 mm × 3.0 mm with exposed thermal pad. Pin 4 connects to V– (negative supply), pin 8 to V+ (positive supply), and the thermal pad must be soldered to V– for optimal thermal performance (RθJB = 111.9 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input of Channel A | Accepts signals up to 200 mV beyond V+ or V–; enables single-supply sensor biasing without external level shift. |
| –IN A (Pin 2) | Inverting input of Channel A | Supports precision transimpedance configurations with photodiodes; low input bias minimizes dark-current error. |
| OUT A (Pin 1) | Output of Channel A | Rail-to-rail swing ensures full utilization of 12-bit+ ADC input range; stable with 300 pF capacitive load. |
| V– (Pin 4) | Negative supply terminal | Reference node for thermal pad connection; must be low-impedance ground plane for EMI suppression and thermal dissipation. |
| +IN B (Pin 5) | Noninverting input of Channel B | Independent input for dual-path signal processing (e.g., differential sensing or active filtering with shared reference). |
| –IN B (Pin 6) | Inverting input of Channel B | Enables matched dual-channel configurations such as instrumentation amp front-end or dual feedback loops. |
| OUT B (Pin 7) | Output of Channel B | Electrically isolated from OUT A; supports independent signal paths without crosstalk (≥100 dB channel separation @ DC). |
| V+ (Pin 8) | Positive supply terminal | Requires local 0.01 µF ceramic bypass capacitor; supplies internal bias circuitry and output stage drive capability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal acquisition from 0 V to VCC in single-supply systems, eliminating level-shifting components. |
| Integrated RF/EMI filter | Rejects cellular, Wi-Fi, and Bluetooth interference at IN+ without external RC networks, reducing layout sensitivity. |
| No phase reversal on overdrive | Prevents latch-up and transient errors in comparator-like applications (e.g., zero-crossing detection in battery monitors). |
| Unity-gain stable | Operates reliably in buffer, follower, and gain-of-one configurations without external compensation components. |
| Extended temperature range | Specified from –40°C to +125°C, supporting deployment in automotive cabin modules and industrial field transmitters. |
| Low input bias current (0.2 pA) | Maintains accuracy in high-Z sensor interfaces (e.g., glass pH electrodes, piezoresistive strain gauges) without guard traces. |
Applications
| Battery-Powered Medical Sensors | Photodiode Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying weak bio-potential signals (ECG, EEG) from dry electrodes in portable diagnostic devices. IC Role / Device Role / Timing Role: Dual-channel precision amplifier providing first-stage gain and active filtering before 12-bit SAR ADC sampling. Use Value: 14 nV/√Hz noise and 0.5 mV offset enable sub-µV signal resolution; 150 µA/channel extends coin-cell life beyond 18 months. |
Use Scenario: Converting photocurrent from ambient light or pulse oximetry sensors into stable voltage output. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with ultra-low input bias current preserving signal fidelity at high feedback resistances. Use Value: 0.2 pA input bias current prevents drift in 100 MΩ TIA configurations; rail-to-rail output matches 1.8 V ADC reference. |
| Active Low-Pass Filters | Wireless Metering Front-Ends |
|
Use Scenario: Implementing 2nd-order Sallen-Key filters in handheld test equipment to suppress 50/60 Hz mains interference. IC Role / Device Role / Timing Role: Dual op-amp configured as unity-gain buffer and filter integrator with precise pole placement. Use Value: 3 MHz GBW supports filter cutoffs up to 100 kHz; low THD+N (0.001%) preserves harmonic content in calibration signals. |
Use Scenario: Signal conditioning for ultrasonic flow meters and smart gas meters operating on primary lithium batteries. IC Role / Device Role / Timing Role: Dual-channel amplifier handling differential pressure sensor outputs and temperature compensation paths. Use Value: –40°C to 125°C rating ensures reliability in outdoor meter enclosures; integrated EMI filter rejects RF noise from GSM/GPRS modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier 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 | Better AC performance but unsuitable for multi-year battery life; lacks RF immunity for wireless-adjacent designs | Select when higher speed and drive strength outweigh power and EMI requirements |
| AD8602ARMZ | Lower noise (12 nV/√Hz), higher offset (600 µV max), no rail-to-rail input | Superior noise floor for audio, but limited common-mode range restricts single-supply sensor use | Select for low-noise audio preamps where dual supply is available and input range is constrained |
Compared with MCP6022-I/SN and AD8602ARMZ, OPA2314AIDGKR uniquely balances ultra-low power (150 µA), integrated EMI rejection, rail-to-rail I/O, and extended temperature operation - making it the preferred choice for space-constrained, battery-powered industrial and medical edge sensors.
Availability
OPA2314AIDGKR is available at Aetrix Electronics and suitable for battery-powered instruments, photodiode amplifiers, and active filters requiring stable component supply across long-lifecycle industrial and medical programs.
Supply support for OPA2314AIDGKR 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 amplifiers and low-power signal chain solutions.
The OPA314 family-including OPA2314AIDGKR-is designed specifically for cost-sensitive, battery-operated applications demanding rail-to-rail performance, low IQ, and robust EMI immunity without sacrificing DC precision or AC bandwidth.
FAQ
What is the maximum capacitive load the OPA2314AIDGKR can drive while remaining stable?
The OPA2314AIDGKR is unity-gain stable and characterized to drive up to 300 pF capacitive load without oscillation or excessive overshoot. This specification is verified per TI's SBOS563G datasheet Figure 20 and supports direct connection to ADC input capacitors and long PCB traces in portable instrumentation. For loads exceeding 300 pF, external isolation resistance or compensation is required. OPA2314AIDGKR maintains phase margin ≥65° under these conditions.
Does the OPA2314AIDGKR support true rail-to-rail input operation below 1.8 V supply?
No - the OPA2314AIDGKR is specified and guaranteed for rail-to-rail input operation only within its recommended supply range of 1.8 V to 5.5 V. At 1.8 V, the input common-mode range extends from (V–) – 0.2 V to (V+) – 1.3 V, satisfying rail-to-rail functionality. Operation below 1.8 V is not characterized and may result in degraded parameters including increased offset voltage and reduced bandwidth. OPA2314AIDGKR requires minimum 1.8 V for full specification compliance.
How does the integrated RF/EMI filter in the OPA2314AIDGKR improve system-level immunity?
The OPA2314AIDGKR integrates a monolithic RF/EMI rejection filter on the noninverting input, achieving >70 dB rejection at 900 MHz (per Figure 32 in SBOS563G). This eliminates the need for external RC filters, reduces board area, and prevents rectification of RF signals that cause DC offset shifts in sensitive measurement circuits. In wireless metering applications, this feature directly improves long-term accuracy by rejecting GSM burst noise without additional components. OPA2314AIDGKR's EMI filter is process-integrated and fully characterized across temperature.
Can the OPA2314AIDGKR be used in a single-supply photodiode transimpedance amplifier?
Yes - the OPA2314AIDGKR is well-suited for single-supply photodiode TIA applications due to its 0.2 pA input bias current, rail-to-rail input (accepting photocurrent-generated voltage near V–), and rail-to-rail output (driving ADCs referenced to same supply). Its low 14 nV/√Hz noise preserves SNR in high-gain configurations. For optimal performance, connect the photodiode cathode to V+ and anode to –IN A, with feedback resistor tied to V–. OPA2314AIDGKR's lack of phase reversal further prevents instability during light-transient events.
What thermal considerations apply to the exposed pad on the OPA2314AIDGKR MSOP package?
The exposed thermal pad on the OPA2314AIDGKR (DGK package) must be soldered to a V– (ground) copper plane to achieve rated thermal performance. Per SBOS563G Section 6.5, RθJB drops from 111.9 °C/W (unconnected) to 20.1 °C/W when the pad is properly connected to V–. Failure to connect the pad degrades power dissipation capability and risks thermal shutdown under sustained 150 µA/channel operation. OPA2314AIDGKR's pad size is 1.8 mm × 1.5 mm and requires ≥5 solder vias to inner ground layers for reliable thermal transfer.
OPA2314AIDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-VSSOP
OPA2314AIDGKR FAQ
1.How can I place an order for OPA2314AIDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2314AIDGKR 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 OPA2314AIDGKR reliable?
The price and inventory of OPA2314AIDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2314AIDGKR is usually 5 days.
3.What payment methods are accepted for OPA2314AIDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2314AIDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2314AIDGKR?
OPA2314AIDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2314AIDGKR 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 OPA2314AIDGKR?
For technical support, including OPA2314AIDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2314AIDGKR requirements.
6.How does Aetrix verify that OPA2314AIDGKR is sourced from the original manufacturer or authorized distributors?
All OPA2314AIDGKR 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 OPA2314AIDGKR meets industry standards.
7.What is the process for return or replacement of OPA2314AIDGKR?
All OPA2314AIDGKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2314AIDGKR, 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 OPA2314AIDGKR part is unused and in its original packaging.
Return procedure for OPA2314AIDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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