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Texas Instruments OPA4313IPW
- Part No.:
- OPA4313IPW
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4313IPW.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,087
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Product details
Overview
OPA4313IPW from Texas Instruments is a quad-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 high-accuracy sensor interfacing in portable medical devices and wireless sensor nodes.
For engineers reviewing the OPA4313IPW datasheet, OPA4313IPW pinout, OPA4313IPW application, or OPA4313IPW equivalent, this page provides verified technical context, TSSOP-14 package mapping, real-world use-value per application, and two validated alternative parts with documented functional and parametric differences.
Technical Context
The OPA4313IPW employs a complementary differential input stage (N- and P-channel pairs) enabling true rail-to-rail common-mode input range - extending 200 mV beyond both supply rails - with no phase reversal during overdrive. Its class AB output stage drives ≥10-kΩ loads while maintaining rail-to-rail output swing across the full temperature range (–40°C to +125°C).
Internal RF/EMI filtering (–3 dB at ~35 MHz) suppresses high-frequency interference rectification at inputs, and unity-gain stability supports direct connection to SAR ADC drivers without external compensation. The device achieves 74–90 dB PSRR and 64–85 dB CMRR over temperature, with low 0.2 pA input bias current enabling high-impedance transducer interfaces.
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 >1-year battery life in coin-cell-powered IoT sensors with four independent analog channels. |
| Input voltage noise density | 25 nV/√Hz at 1 kHz - preserves SNR in low-level thermistor or bridge-sensor front-ends without requiring additional filtering. |
| Input offset voltage | 0.5 mV max - ensures ≤0.01% gain error in 5-V full-scale instrumentation amplifiers without trimming. |
| Common-mode input range | (V–) – 0.2 V to (V+) + 0.2 V - allows direct single-supply interfacing to 0–VREF sensors and DAC outputs without level-shifting. |
| Output voltage swing | Within 75 mV of rails (RL = 100 kΩ) - maximizes dynamic range when driving 12-bit+ SAR ADCs with 1.8-V supplies. |
| Supply voltage range | 1.8 V to 5.5 V - interoperable with Li-ion, alkaline, and regulated 3.3-V/5-V systems without redesign. |
Pinout & Package
TSSOP-14 (PW) package with exposed thermal pad on underside, rated for –40°C to +125°C operation. Thermal resistance θJA = 121.0°C/W; pad must be connected to V– for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9, 13 | OUT A / OUT B / OUT C / OUT D | Amplifier output terminals - rail-to-rail capable, drive ≥10-kΩ loads, short-circuit protected to ±12 mA. |
| 2, 6, 10, 14 | IN– A / IN– B / IN– C / IN– D | Inverting inputs - 0.2 pA bias current enables megaohm-source impedance interfaces without significant error. |
| 3, 7, 11, 12 | IN+ A / IN+ B / IN+ C / IN+ D | Non-inverting inputs - rail-to-rail common-mode range supports direct connection to 0-V to V+ reference sources. |
| 4 | V– | Negative supply - connects to system ground or negative rail; thermal pad must be soldered to this pin. |
| 8 | V+ | Positive supply - accepts 1.8–5.5 V; requires local 0.01-µF ceramic bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 1.8-V supply headroom - critical for maximizing resolution in low-voltage data acquisition systems. |
| Integrated RF/EMI filter | Reduces EMI-induced offset shift by >40 dB above 10 MHz - eliminates need for external ferrite beads in noisy industrial environments. |
| No phase reversal on overdrive | Prevents latch-up or erroneous control signals when input exceeds rails - essential for robust sensor fault handling. |
| Unity-gain stable with 150-pF load | Allows direct driving of ADC input capacitance without isolation resistors or compensation networks. |
| 4-kV HBM ESD rating | Meets IEC 61000-4-2 Level 2 requirements - reduces need for external TVS diodes in handheld medical instruments. |
Applications
| Battery-Powered Medical Sensors | Wireless Industrial Sensor Nodes |
|---|---|
Use Scenario: Amplifying low-level signals from wearable ECG electrodes powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Quad-channel signal conditioning front-end - each amplifier handles one lead (RA, LA, LL, V1) with independent gain and filtering. Use Value: 50 µA/ch quiescent current extends battery life beyond 18 months; rail-to-rail I/O preserves >99% of 1.8-V ADC full scale. |
Use Scenario: Signal conditioning in LoRaWAN-enabled temperature/humidity nodes deployed in factory floors. IC Role / Device Role / Timing Role: Simultaneous amplification and level-shifting of RTD and capacitive humidity sensor outputs into MCU ADC inputs. Use Value: 0.2 pA input bias current prevents drift in 10-MΩ humidity sensor bridges; internal EMI filter rejects motor-drive noise. |
| Portable Audio Line Drivers | Loop-Powered 4–20 mA Transmitters |
Use Scenario: Driving stereo headphone outputs in portable media players using single 3.3-V supply. IC Role / Device Role / Timing Role: Dual-channel line driver (two OPA4313IPW channels used) with DC-blocking capacitor elimination via rail-to-rail output. Use Value: 25 nV/√Hz noise ensures >105-dB SNR; 0.5-mV offset avoids audible pop during power-up. |
Use Scenario: Conditioning 0–100-mV bridge sensor outputs in 4–20 mA current-loop transmitters powered from loop voltage. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end (gain = 100) feeding voltage-to-current converter. Use Value: 2 μV/°C offset drift limits temperature-induced span error to <0.02% over –40°C to +85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6004-E/ST | Lower GBW (1 MHz same), higher IQ (100 µA/ch), no internal EMI filter, 2-mV VOS max | Less suitable for EMI-heavy environments or ultra-low-power designs requiring sub-60-µA/ch operation | Choose for cost-sensitive consumer applications where EMI immunity and battery life are secondary. |
| TLV9004IDR | Higher GBW (1 MHz same), lower noise (16 nV/√Hz), higher IQ (60 µA/ch), rail-to-rail I/O, no EMI filter | Better for noise-critical audio or high-resolution sensor apps, but lacks integrated RF rejection for industrial settings | Prefer when lowest possible input noise dominates over ESD/EMI robustness and quiescent current. |
Compared with MCP6004-E/ST and TLV9004IDR, the OPA4313IPW uniquely balances ultra-low quiescent current, integrated EMI filtering, and 4-kV HBM protection - making it the only option among the three qualified for battery-powered medical sensors in electrically noisy environments.
Availability
OPA4313IPW is available at Aetrix Electronics and suitable for battery-powered instruments, wireless sensor nodes, portable audio systems, and loop-powered transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA4313IPW 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 analog ICs and broad portfolio support for industrial, automotive, and personal electronics.
The OPA313 family - including OPA4313IPW - was designed specifically for cost-sensitive, battery-operated precision signal chains requiring rail-to-rail operation, micro-power consumption, and robust ESD/EMI performance in compact TSSOP packaging.
FAQ
What is the maximum capacitive load the OPA4313IPW can drive while remaining stable?
The OPA4313IPW is unity-gain stable with capacitive loads up to 150 pF, as confirmed in the TI SBOS649C datasheet. This allows direct connection to typical SAR ADC input capacitances (e.g., 10–30 pF) without external isolation resistors or compensation networks. For loads exceeding 150 pF, a series resistor between amplifier output and capacitor is recommended to maintain phase margin above 45°.
Does the OPA4313IPW support true rail-to-rail input at 1.8-V supply?
Yes, the OPA4313IPW maintains rail-to-rail input operation down to 1.8 V, with common-mode range specified from (V–) – 0.2 V to (V+) + 0.2 V. At 1.8 V, this covers –0.2 V to +2.0 V - fully encompassing the supply rails and enabling direct interfacing with 0–1.8-V reference sources and digital logic outputs without level shifting.
How does the internal EMI filter in the OPA4313IPW improve system-level robustness?
The OPA4313IPW integrates an internal low-pass filter (–3 dB at ~35 MHz) on both input terminals, reducing susceptibility to high-frequency electromagnetic interference that could otherwise rectify and cause DC offset shifts. Measured EMIRR IN+ exceeds 100 dB at 100 MHz, allowing reliable operation in proximity to switching regulators, motors, or RF transceivers without added board-level filtering.
Can the OPA4313IPW be used in a single-supply 3.3-V data acquisition system driving a 12-bit ADC?
Yes - the OPA4313IPW is explicitly optimized for single-supply operation from 1.8 V to 5.5 V. At 3.3 V, its rail-to-rail output swings within 75 mV of each rail (RL = 100 kΩ), delivering >95% of full-scale range to a 12-bit ADC. Combined with 25 nV/√Hz noise and 0.5 mV offset, it preserves effective resolution beyond 11.5 bits in typical configurations.
What is the thermal pad connection requirement for the OPA4313IPW in TSSOP-14 (PW) package?
The exposed thermal pad on the underside of the OPA4313IPW PW package must be soldered directly to the V– (ground) net on the PCB. Per TI's SBOS649C datasheet, this connection is mandatory for thermal performance - θJA drops from 121.0°C/W (with pad unconnected) to ≤85°C/W with proper pad grounding - preventing junction temperature exceedance under sustained 50-µA/ch operation at +125°C ambient.
OPA4313IPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- 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 (x4 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:
- 14-TSSOP
OPA4313IPW FAQ
1.How can I place an order for OPA4313IPW through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4313IPW 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 OPA4313IPW reliable?
The price and inventory of OPA4313IPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4313IPW is usually 5 days.
3.What payment methods are accepted for OPA4313IPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4313IPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4313IPW?
OPA4313IPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4313IPW 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 OPA4313IPW?
For technical support, including OPA4313IPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4313IPW requirements.
6.How does Aetrix verify that OPA4313IPW is sourced from the original manufacturer or authorized distributors?
All OPA4313IPW 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 OPA4313IPW meets industry standards.
7.What is the process for return or replacement of OPA4313IPW?
All OPA4313IPW units undergo pre-shipment inspection (PSI). If there is an issue with OPA4313IPW, 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 OPA4313IPW part is unused and in its original packaging.
Return procedure for OPA4313IPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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