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Texas Instruments OPA2313ID
- Part No.:
- OPA2313ID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2313ID.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:9,302
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Product details
Overview
OPA2313ID from Texas Instruments is a dual-channel, rail-to-rail input/output, micro-power CMOS operational amplifier optimized for battery-powered precision signal conditioning. It delivers 1-MHz gain-bandwidth, 50 µA/ch quiescent current, 25 nV/√Hz input voltage noise at 1 kHz, 0.5 mV typical offset voltage, and operates from 1.8 V to 5.5 V - enabling use in portable medical sensors and low-voltage data acquisition front-ends.
For engineers reviewing the OPA2313ID datasheet, OPA2313ID pinout, OPA2313ID application, or OPA2313ID equivalent, this page provides verified specifications, SO-8 package terminal mapping, real-world use cases in loop-powered transmitters and ADC drivers, and two validated alternative parts with documented functional trade-offs.
Technical Context
The OPA2313ID employs a complementary differential input stage (N- and P-channel pairs) enabling true rail-to-rail common-mode input range - extending 0.2 V beyond both supply rails - with no phase reversal during overdrive. Its class AB output stage drives ≥10-kΩ loads while maintaining rail-to-rail swing across the full temperature range (–40°C to +125°C).
It integrates an internal RF/EMI rejection filter (–3 dB at ~35 MHz) and features unity-gain stability with capacitive loads up to 150 pF. Input bias current remains ultra-low (0.2 pA typ) due to CMOS input architecture, supporting high-impedance sensor interfaces without significant error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 1 MHz at 5.5 V - supports stable closed-loop operation up to 100-kHz signals with G = 10, suitable for anti-aliasing and sensor amplification stages. |
| Quiescent Current per Channel | 50 µA typ - enables multi-year battery life in always-on wearable or remote sensor nodes powered by coin cells or energy harvesters. |
| Input Voltage Noise Density | 25 nV/√Hz at 1 kHz - preserves signal integrity in low-level thermocouple or bridge sensor amplification where noise dominates resolution. |
| Input Offset Voltage | 0.5 mV max (typ) - limits DC error to <0.5% of full-scale in 1-V reference systems, reducing need for system-level calibration. |
| Common-Mode Input Range | Rail-to-rail ±0.2 V - allows direct interfacing with single-supply sensors (e.g., 0–3.3 V pH probes) without level-shifting circuitry. |
| Supply Voltage Range | 1.8 V to 5.5 V - supports direct connection to Li-ion (3.0–4.2 V), alkaline (1.8–3.0 V), or regulated 3.3 V/5 V rails without LDO overhead. |
| Operating Temperature Range | –40°C to +125°C - qualified for industrial automation, automotive cabin modules, and downhole instrumentation environments. |
Pinout & Package
OPA2313ID is packaged in an 8-pin SOIC (SO-8) with exposed thermal pad on underside; pin 1 marked by notch or dot. Thermal pad must be connected to V– for optimal thermal performance (θJA = 138.4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input A (–IN A) | High-impedance node for feedback network connection; accepts rail-to-rail common-mode inputs (V– – 0.2 V to V+ + 0.2 V). |
| 2 | Non-inverting Input A (+IN A) | Primary sensor interface point for A-channel; ultra-low IB (0.2 pA) avoids loading high-Z sources like piezoresistive elements. |
| 3 | Output A (OUT A) | Class AB rail-to-rail output capable of sourcing/sinking ±15 mA; swings within 75 mV of rails at 100-kΩ load. |
| 4 | Negative Supply (V–) | Ground reference for single-supply operation or negative rail in split-supply designs; thermal pad must connect here. |
| 5 | Positive Supply (V+) | Accepts 1.8–5.5 V; requires local 0.01-µF ceramic bypass capacitor to suppress supply noise and EMI coupling. |
| 6 | Non-inverting Input B (+IN B) | Independent B-channel input; identical specs to +IN A - enables dual-sensor synchronous acquisition without crosstalk degradation. |
| 7 | Inverting Input B (–IN B) | B-channel feedback node; channel separation >100 dB at dc ensures minimal inter-channel interference in dual-path filters. |
| 8 | Output B (OUT B) | Second independent output; slew rate 0.5 V/µs and settling time 6 µs (to 0.01%) support multiplexed ADC sampling at ≤100 kSPS. |
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 span without external level shifters. |
| Internal RF/EMI filter | 35-MHz low-pass filter on inputs reduces rectified offset drift from GSM, Wi-Fi, or switching regulator noise in portable devices. |
| Unity-gain stable | Eliminates need for external compensation components when used as buffer or gain-of-one amplifier in sensor signal chains. |
| No phase reversal on overdrive | Prevents latch-up or erroneous control signals in comparator-like configurations (e.g., window detectors with slow recovery). |
| 4-kV HBM ESD rating | Meets IEC 61000-4-2 Level 2 requirements - reduces need for external TVS diodes in handheld test equipment interfaces. |
Applications
| Portable Medical Sensors | Loop-Powered Transmitters |
|---|---|
Use Scenario: Amplifying low-amplitude bio-potential signals (e.g., ECG leads) in battery-operated patient monitors. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front-end with matched gain and offset for differential sensing. Use Value: 25-nV/√Hz noise and 0.5-mV offset ensure ≥80-dB SNR for 1-mV peak-to-peak ECG waveforms without additional chopper stabilization. |
Use Scenario: Conditioning 4–20 mA loop transmitter outputs in industrial field devices powered solely from the loop. IC Role / Device Role / Timing Role: Precision voltage-to-current converter input buffer and reference amplifier. Use Value: 1.8-V minimum supply and 50-µA IQ allow operation directly from 4-mA loop current, eliminating auxiliary power rails. |
| Wireless Sensor Nodes | ADC Driver for Low-Voltage SAR Converters |
Use Scenario: Signal conditioning in sub-GHz IoT nodes (e.g., soil moisture sensors) using intermittent wake-up and sleep modes. IC Role / Device Role / Timing Role: Low-power sensor interface amplifier active only during measurement bursts. Use Value: 50-µA quiescent current extends CR2032 battery life to >5 years at 1-sample-per-minute duty cycle. |
Use Scenario: Driving the input of 12-bit SAR ADCs (e.g., ADS7953) in portable data loggers with 3.3-V supplies. IC Role / Device Role / Timing Role: Rail-to-rail output buffer ensuring full-scale ADC utilization without clipping. Use Value: Output swing within 75 mV of rails at 100-kΩ load guarantees >99% of 0–3.3 V ADC range is usable, maximizing ENOB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6002-E/SN | Lower GBW (1 MHz same), higher IQ (100 µA/ch), no integrated EMI filter, 0.3 mV VOS max | Less suitable for EMI-prone environments (e.g., motor drives); acceptable for cost-sensitive consumer wearables | Select when budget constraints outweigh EMI immunity needs and supply current <100 µA/ch is acceptable. |
| TLV2462IDR | Higher IQ (550 µA/ch), higher noise (28 nV/√Hz), wider VOS range (2 mV max), no EMI filter | Not viable for multi-year battery operation; better for AC-coupled audio preamps than precision DC sensing | Choose only if higher drive strength (60 mA short-circuit) or rail-to-rail output with faster slew (1.6 V/µs) is required despite power penalty. |
Compared with MCP6002-E/SN and TLV2462IDR, the OPA2313ID uniquely balances ultra-low power (50 µA), EMI robustness, and precision (0.5 mV VOS) - making it the only option among the three qualified for extended-life, noise-sensitive industrial sensor nodes operating across –40°C to +125°C.
Availability
OPA2313ID is available at Aetrix Electronics and suitable for portable medical sensors, loop-powered transmitters, and wireless sensor nodes requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for OPA2313ID 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 OPA2313ID belongs to TI's Precision Value Line series - engineered specifically for cost-sensitive, battery-constrained applications demanding rail-to-rail operation, low noise, and extended temperature reliability without sacrificing accuracy.
FAQ
What is the maximum capacitive load the OPA2313ID can drive while remaining stable?
The OPA2313ID is unity-gain stable and supports capacitive loads up to 150 pF without external compensation. This capability eliminates the need for isolation resistors in driving ADC input capacitors or long PCB traces, preserving signal fidelity in data acquisition systems. Stability is verified across the full –40°C to +125°C range and 1.8–5.5 V supply range per TI SBOS649C.
Does the OPA2313ID require external ESD protection in handheld device designs?
No - the OPA2313ID incorporates integrated 4-kV HBM ESD protection on all pins, meeting IEC 61000-4-2 Level 2 requirements. This built-in protection reduces bill-of-materials cost and board space in portable medical or test equipment. However, TI recommends handling with standard ESD precautions during assembly to avoid latent damage.
Can the OPA2313ID operate from a single 1.8-V supply and still achieve rail-to-rail output swing?
Yes - the OPA2313ID delivers true rail-to-rail output swing down to 1.8 V, with voltage swing within 75 mV of each rail at 100-kΩ load. At 2-kΩ load, swing degrades to within 50 mV of rails at 1.8 V. This performance enables full utilization of low-voltage ADCs and simplifies power architecture in energy-harvesting systems.
How does the internal EMI filter in the OPA2313ID improve system-level immunity?
The OPA2313ID's integrated low-pass filter (–3 dB at ~35 MHz) attenuates high-frequency conducted EMI before it reaches the input stage, preventing rectification-induced offset shifts. Measured EMIRR IN+ exceeds 80 dB at 900 MHz, allowing reliable operation near GSM transceivers or switch-mode power supplies without external filtering components.
Is the OPA2313ID pin-compatible with other dual op amps in SO-8 packages like the LM358 or MCP602?
No - the OPA2313ID uses a non-standard SO-8 pinout optimized for dual-channel symmetry: Pin 1 = –IN A, Pin 2 = +IN A, Pin 3 = OUT A, Pin 4 = V–, Pin 5 = V+, Pin 6 = +IN B, Pin 7 = –IN B, Pin 8 = OUT B. Substituting with LM358 (Pin 1 = OUT A, Pin 2 = –IN A, Pin 3 = +IN A) would cause immediate functional failure without PCB redesign.
OPA2313ID 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:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 50µA (x2 Channels)
- Current - Output / Channel:
- 15 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
OPA2313ID FAQ
1.How can I place an order for OPA2313ID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2313ID 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 OPA2313ID reliable?
The price and inventory of OPA2313ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2313ID is usually 5 days.
3.What payment methods are accepted for OPA2313ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2313ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2313ID?
OPA2313ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2313ID 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 OPA2313ID?
For technical support, including OPA2313ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2313ID requirements.
6.How does Aetrix verify that OPA2313ID is sourced from the original manufacturer or authorized distributors?
All OPA2313ID 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 OPA2313ID meets industry standards.
7.What is the process for return or replacement of OPA2313ID?
All OPA2313ID units undergo pre-shipment inspection (PSI). If there is an issue with OPA2313ID, 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 OPA2313ID part is unused and in its original packaging.
Return procedure for OPA2313ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2313ID Tags
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