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Texas Instruments OPA2313IDGKR
- Part No.:
- OPA2313IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2313IDGKR.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,794
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Product details
Overview
OPA2313IDGKR from Texas Instruments is a dual-channel, rail-to-rail input/output, micro-power CMOS operational amplifier optimized for battery-powered instrumentation and sensor 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. It is used in portable medical devices, loop-powered sensors, and wireless metering nodes where low power and precision are critical.
For engineers reviewing the OPA2313IDGKR datasheet, OPA2313IDGKR pinout, OPA2313IDGKR application, or OPA2313IDGKR equivalent, this page provides verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options - all aligned to TI's SBOS649C specification and MSOP-8 packaging.
Technical Context
The OPA2313IDGKR uses a complementary differential input stage enabling true rail-to-rail common-mode input range (extending 0.2 V beyond both rails), with a transition region near (V+) – 1.3 V where both N- and P-channel pairs operate. Its class AB output stage drives ≥10-kΩ loads while maintaining rail-to-rail swing.
It integrates an internal RF/EMI filter (–3 dB at ~35 MHz) to suppress rectification-induced offset shifts, supports capacitive loads up to 150 pF without instability, and features no phase reversal under overdrive - critical for robust front-end signal conditioning in noisy embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 1 MHz at 5.5 V supply - enables stable unity-gain buffer or gain-of-10 amplification up to 100 kHz. |
| Quiescent Current | 50 µA per channel - allows continuous operation for >1 year on a single CR2032 coin cell in low-duty-cycle sensor nodes. |
| Input Offset Voltage | 0.5 mV typical - limits DC error to <0.5% of full-scale in 1-V reference-based 12-bit ADC driver applications. |
| Input Voltage Noise | 25 nV/√Hz at 1 kHz - preserves SNR in high-impedance pH or thermopile sensor interfaces. |
| Supply Range | 1.8 V to 5.5 V - supports direct connection to Li-ion, 2×AA, or regulated 3.3-V/5-V rails without level-shifting. |
| CMRR | 70 dB min (–40°C to +125°C) - rejects common-mode interference in industrial 4–20 mA loop receivers. |
| ESD Rating | 4-kV HBM - meets IEC 61000-4-2 Level 2 for handheld instrument handling reliability. |
Pinout & Package
OPA2313IDGKR is packaged in an 8-pin MSOP (DGK) with exposed thermal pad on underside, rated for –40°C to +125°C operation. The thermal pad must be connected to V– for optimal thermal performance and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Drives external load or ADC input; rail-to-rail swing supports full dynamic range utilization. |
| 2 (–IN A) | Inverting input A | Accepts feedback network or differential signal; high impedance (0.2 pA bias) minimizes loading on high-Z sources. |
| 3 (+IN A) | Non-inverting input A | Connects to sensor reference or filtered signal; rail-to-rail common-mode range enables single-supply biasing at V+/2. |
| 4 (V–) | Negative supply | Reference for all internal circuitry; thermal pad must be soldered to this net for thermal and EMI integrity. |
| 5 (+IN B) | Non-inverting input B | Independent second channel input; identical specs to Channel A - enables dual-sensor or differential pair processing. |
| 6 (–IN B) | Inverting input B | Supports independent feedback configuration; no crosstalk degradation below 70 dB up to 100 kHz (Channel Separation). |
| 7 (OUT B) | Amplifier B output | Provides second buffered output; unity-gain stable into 150 pF - suitable for driving ADC sample-and-hold inputs directly. |
| 8 (V+) | Positive supply | Accepts 1.8–5.5 V; internal ESD diodes clamp transients to rails - requires ≤10 mA external current limiting if overdriven. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input & output | Enables full supply utilization in 1.8-V systems - extends effective ADC input range by >30% vs. legacy op amps. |
| Internal RF/EMI filter | Reduces offset shift from ambient RF fields (e.g., GSM, Wi-Fi) - eliminates need for external ferrite beads or RC filters in portable designs. |
| No phase reversal on overdrive | Prevents latch-up or erroneous control signals when input exceeds rails - essential for fault-tolerant sensor front ends. |
| Low input bias current (0.2 pA typ) | Minimizes voltage error across >10-MΩ source impedances - critical for piezoelectric, photodiode, and electrochemical sensor interfaces. |
| Unity-gain stability | Eliminates need for external compensation components - simplifies layout and reduces BOM count in space-constrained modules. |
Applications
| Battery-Powered Medical Monitor | Loop-Powered Industrial Sensor |
|---|---|
Use Scenario: Amplifying weak ECG electrode signals in a handheld cardiac monitor powered by a 3-V coin cell. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front end - Channel A buffers reference electrode, Channel B amplifies differential lead signal. Use Value: 50 µA/ch IQ extends battery life to >18 months; rail-to-rail input accepts ±100-mV electrode swing without external biasing; 25-nV/√Hz noise preserves diagnostic SNR. | Use Scenario: Signal conditioning for a 4–20 mA pressure transmitter operating from 24-V loop power. IC Role / Device Role / Timing Role: Precision I/V converter and output buffer - converts loop current to 0–5 V, then drives isolated ADC input. Use Value: 0.5 mV offset ensures <0.1% FSR error at 4 mA; 70 dB CMRR rejects common-mode noise from long field wiring; 1.8–5.5 V range accommodates varying loop drop. |
| Wireless Temperature Node | Notebook Ambient Light Control |
Use Scenario: Conditioning thermistor voltage in an ultra-low-power BLE temperature sensor node. IC Role / Device Role / Timing Role: Low-power sensor interface amplifier - biases thermistor, filters noise, and scales output for MCU ADC. Use Value: 50 µA/ch IQ enables 10-year battery life on CR2477; 2 μV/°C drift minimizes calibration frequency; internal EMI filter prevents RF-induced reading errors. | Use Scenario: Driving ambient light sensor output in a thin notebook design with tight thermal constraints. IC Role / Device Role / Timing Role: Rail-to-rail output buffer - interfaces photodiode amplifier to 1.8-V SAR ADC while rejecting supply ripple. Use Value: MSOP-8 package fits narrow edge layouts; exposed thermal pad lowers junction temperature by 15°C vs. SO-8; PSRR >74 dB suppresses digital supply noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6002T-I/SN | Lower GBW (1 MHz same), higher IQ (100 µA/ch), no internal EMI filter, 0.3 mV offset | Better offset but higher power; lacks EMI rejection - unsuitable for RF-noisy environments | Select only if EMI immunity is not required and lower offset outweighs 2× IQ penalty. |
| LMV358IDR | Higher IQ (150 µA/ch), wider offset range (3 mV max), no rail-to-rail input, no EMI filter | Cost-optimized general-purpose dual op amp - insufficient for precision low-voltage sensor apps | Use only in non-critical, cost-sensitive 3.3-V or 5-V systems where rail-to-rail input and low noise are unnecessary. |
Compared with MCP6002T-I/SN and LMV358IDR, OPA2313IDGKR uniquely balances micro-power operation (50 µA/ch), precision (0.5 mV offset), rail-to-rail functionality, and integrated EMI filtering - making it the only option among the three qualified for battery-powered medical and industrial sensing where signal integrity and longevity are co-prioritized.
Availability
OPA2313IDGKR is available at Aetrix Electronics and suitable for battery-powered instruments, loop-powered industrial sensors, and wireless metering nodes requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA2313IDGKR 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 deep expertise in precision signal chain and low-power design.
The OPA2313IDGKR belongs to TI's Precision Value Line series - engineered specifically for cost-sensitive, battery-operated applications demanding high accuracy, rail-to-rail performance, and robustness in harsh electrical environments.
FAQ
What is the maximum capacitive load the OPA2313IDGKR can drive while remaining stable?
The OPA2313IDGKR is unity-gain stable with capacitive loads up to 150 pF, as confirmed in TI's SBOS649C datasheet Figure 21 (Phase Margin vs Capacitive Load). This allows direct connection to sampling ADC inputs or long PCB traces without external isolation resistors - provided layout minimizes parasitic inductance and supply bypassing uses 0.01-μF ceramic capacitors near V+ and V– pins. Exceeding 150 pF risks peaking or oscillation.
Does the OPA2313IDGKR support true rail-to-rail input at 1.8-V supply?
Yes, the OPA2313IDGKR supports rail-to-rail input at 1.8 V: its common-mode input range extends from (V–) – 0.2 V to (V+) + 0.2 V, meaning it accepts signals from –0.2 V to +2.0 V when V– = 0 V and V+ = 1.8 V. This is explicitly verified in the Electrical Characteristics tables for +1.8 V operation (pages 5–6 of SBOS649C), ensuring compatibility with low-voltage sensor biasing schemes.
How does the internal EMI filter in the OPA2313IDGKR improve system-level robustness?
The OPA2313IDGKR's internal low-pass EMI filter (–3 dB at ~35 MHz) attenuates high-frequency interference before it reaches the input stage, preventing rectification-induced DC offset shifts - a known failure mode in portable devices near cellular/Wi-Fi transceivers. Measured EMIRR IN+ exceeds 100 dB at 900 MHz (Figure 33, SBOS649C), eliminating need for external filtering components and improving measurement repeatability in RF-rich environments.
Can the OPA2313IDGKR be used in a single-supply 3.3-V system driving a 12-bit SAR ADC?
Yes, the OPA2313IDGKR is ideal for this use case: its rail-to-rail output swings within 75 mV of each rail at 3.3 V (per Electrical Characteristics, page 4), delivering >3.15 V of usable range for a 3.3-V ADC; its 25 nV/√Hz noise contributes <0.5 LSB error in a 12-bit, 3.3-V system; and its 50 µA/ch IQ avoids burdening low-noise LDOs. Biasing the non-inverting input at V+/2 via matched resistors ensures optimal common-mode headroom.
What is the thermal pad connection requirement for the OPA2313IDGKR in MSOP-8 (DGK) package?
The exposed thermal pad on the OPA2313IDGKR's DGK package must be soldered to the V– (ground) net on the PCB. TI's SBOS649C datasheet (page 8, PIN CONFIGURATIONS) specifies this connection to ensure proper heat dissipation and EMI suppression. Failure to connect the pad degrades θJA by >100°C/W and increases susceptibility to RF interference - compromising both reliability and signal integrity in high-density layouts.
OPA2313IDGKR 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:
- 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-VSSOP
OPA2313IDGKR FAQ
1.How can I place an order for OPA2313IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2313IDGKR 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 OPA2313IDGKR reliable?
The price and inventory of OPA2313IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2313IDGKR is usually 5 days.
3.What payment methods are accepted for OPA2313IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2313IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2313IDGKR?
OPA2313IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2313IDGKR 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 OPA2313IDGKR?
For technical support, including OPA2313IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2313IDGKR requirements.
6.How does Aetrix verify that OPA2313IDGKR is sourced from the original manufacturer or authorized distributors?
All OPA2313IDGKR 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 OPA2313IDGKR meets industry standards.
7.What is the process for return or replacement of OPA2313IDGKR?
All OPA2313IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2313IDGKR, 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 OPA2313IDGKR part is unused and in its original packaging.
Return procedure for OPA2313IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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