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Texas Instruments OPA244NA/3K1G4
- Part No.:
- OPA244NA/3K1G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA244NA/3K1G4.pdf
- Description:
- SINGLE, 36-V, 430-KHZ, LOW-POWER
- Quantity:
- Payment:
- Shipping:
Inventory:2,191
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Product details
Overview
OPA244NA/3K1G4 from Texas Instruments (formerly Burr-Brown) is a single, rail-to-rail input micro-power operational amplifier in SOT-23-5 package, featuring 50 µA/channel quiescent current, 430 kHz gain-bandwidth product, and operation from +2.2 V to +36 V single supply - ideal for battery-powered instrumentation and portable sensing circuits.
For engineers reviewing the OPA244NA/3K1G4 datasheet, OPA244NA/3K1G4 pinout, OPA244NA/3K1G4 application, or OPA244NA/3K1G4 equivalent, key selection considerations include its guaranteed performance across –40°C to +85°C, input common-mode range extending to V–, unity-gain stability, and low-input bias current (–25 nA typical) enabling precision current sensing.
Technical Context
The OPA244NA/3K1G4 implements a bipolar input stage with JFET-like input impedance (10⁹ Ω || 2 pF common-mode), delivering stable unity-gain operation without phase inversion. Its architecture supports wide supply range operation while maintaining consistent open-loop gain (≥86 dB) and CMRR (≥84 dB) over temperature and voltage.
It features internal compensation for unconditional stability at G = 1, with overload recovery time of 8 µs and slew rate of –0.1/+0.16 V/µs. Input offset voltage is specified at ±1.5 mV (typ), with drift of ±4 µV/°C - optimized for low-drift, low-power signal conditioning in space-constrained systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 50 µA per amplifier - enables multi-year battery life in always-on sensor nodes and portable medical devices. |
| Gain-Bandwidth Product | 430 kHz - supports accurate amplification of DC to ~100 kHz signals (e.g., thermocouple, strain gauge outputs) with minimal phase lag. |
| Supply Voltage Range | +2.2 V to +36 V single supply - eliminates need for dual supplies in industrial sensors, battery monitors, and automotive auxiliary circuits. |
| Input Common-Mode Range | 0 V to (V+) – 0.9 V - includes ground, enabling direct interfacing with single-ended transducers and ADC reference inputs. |
| Output Voltage Swing | (V+) – 0.75 V / 0.1 V (RL = 20 kΩ to ground) - delivers usable dynamic range near supply rails in low-voltage systems. |
| Input Offset Voltage | ±1.5 mV (typ) - ensures <0.1% error in 10-bit ADC front-ends with 3.3 V full-scale range. |
| Input Bias Current | –25 nA (typ) - minimizes voltage error across high-impedance sources (e.g., pH electrodes, photodiodes). |
Pinout & Package
SOT-23-5 surface-mount package (DBV), 1.45 mm max height, JEDEC MO-178 compliant, with exposed pad not electrically connected.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (–In) | High-impedance differential input node; accepts signals down to V– (ground in single-supply use). |
| 2 | Non-inverting Input (+In) | High-impedance differential input node; common-mode range includes V– for true single-supply operation. |
| 3 | Output | Class-AB output stage capable of sourcing 12 mA / sinking 25 mA; rail-swing limited by load and supply. |
| 4 | V– (Ground / Negative Supply) | Reference return for both input and output stages; must be low-impedance path to minimize noise coupling. |
| 5 | V+ (Positive Supply) | Power input; requires local 0.01 µF ceramic bypass capacitor to ground per datasheet recommendation. |
Key Features
| Feature | Design Value |
|---|---|
| MicroPower Operation | 50 µA/channel quiescent current enables >5-year operation on CR2032 coin cell in wake-on-event sensor nodes. |
| Unity-Gain Stable | No external compensation required - simplifies layout and reduces BOM count in gain-of-1 buffers and active filters. |
| Single-Supply Compatibility | Input common-mode range includes V– and output swings within 0.1 V of V– - eliminates level-shifting circuitry in 3.3 V or 5 V systems. |
| Low Input Bias Current | –25 nA typical enables accurate amplification of high-Z sources (e.g., piezoresistive sensors, ion-selective electrodes) without significant loading error. |
| Wide Supply Range | Operates from +2.2 V (Li-ion cutoff) to +36 V (industrial 24 V bus) - one part supports multiple power domains across product families. |
Applications
| Battery Current Monitoring | Portable Medical Sensor Interface |
|---|---|
Use Scenario: Real-time measurement of charge/discharge current in lithium-ion battery packs using low-value shunt resistors. IC Role / Device Role: Precision current-sense amplifier configured in high-side or low-side topology with fixed gain. Use Value: Delivers <1% gain error over –40°C to +85°C with 50 µA supply current, enabling extended runtime without calibration drift. | Use Scenario: Signal conditioning for ECG, pulse oximetry, or glucose sensor analog front-ends in handheld diagnostic devices. IC Role / Device Role: Low-noise, rail-to-rail input buffer and filter driver preceding 12-bit SAR ADC. Use Value: 0.4 µVp-p input noise (0.1–10 kHz) and 22 nV/√Hz density preserve weak bio-signals; micro-power operation extends clinical device battery life. |
| PCMCIA Card Analog I/O | Industrial 4–20 mA Loop Receiver |
Use Scenario: Adding analog input/output capability to legacy PCMCIA-based data acquisition cards with tight board area constraints. IC Role / Device Role: Single-supply op amp for scaling and offsetting sensor outputs before digitization. Use Value: SOT-23-5 footprint saves >70% PCB area vs SO-8; 430 kHz bandwidth supports multiplexed multi-channel sampling at 1 kSPS. | Use Scenario: Converting 4–20 mA loop current into precise 0–5 V or 0–10 V voltage for PLC analog inputs in factory automation. IC Role / Device Role: High-accuracy, low-drift transimpedance amplifier with programmable gain. Use Value: ±1.5 mV input offset and ±4 µV/°C drift ensure <0.2% total error over industrial temperature range without trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA344UA | Higher quiescent current (80 µA), wider GBW (1 MHz), same SOT-23-5 package. | Better for higher-frequency signal paths (>100 kHz); less suitable for ultra-low-power designs. | Select OPA344UA when bandwidth >500 kHz is required and supply current budget allows ≥80 µA. |
| LMV321IDBVR | Lower IQ (60 µA), lower VOS (±3 mV typ), rail-to-rail output only (not input), same SOT-23-5. | Limited common-mode range (does not include V–) - unsuitable for true ground-referenced inputs. | Choose LMV321IDBVR only if input signals stay ≥0.2 V above V– and output swing near V– is acceptable. |
Compared with OPA344UA and LMV321IDBVR, the OPA244NA/3K1G4 uniquely combines rail-to-rail input, 50 µA IQ, and guaranteed –40°C to +85°C performance - making it optimal for precision, low-power, ground-sensing applications where input headroom is critical.
Availability
OPA244NA/3K1G4 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and industrial sensor interfaces requiring stable component supply with long-term lifecycle support.
Supply support for OPA244NA/3K1G4 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 acquired Burr-Brown in 2000 and maintains its precision analog portfolio, renowned for high-performance op amps, data converters, and interface ICs.
The OPA244 series belongs to TI's MicroAmplifier™ family, designed specifically for ultra-low-power, high-precision signal conditioning in space- and energy-constrained applications such as portable test equipment and battery management systems.
FAQ
What is the maximum operating temperature range for the OPA244NA/3K1G4?
The OPA244NA/3K1G4 is fully specified from –40°C to +85°C (industrial grade), with extended operation possible from –55°C to +125°C. Thermal resistance (θJA) is 200°C/W for the SOT-23-5 package, so power dissipation must remain below 125 mW to avoid junction exceedance at +85°C ambient. The OPA244NA/3K1G4 datasheet confirms these limits under Absolute Maximum Ratings and Electrical Characteristics tables.
Does the OPA244NA/3K1G4 support rail-to-rail input and output?
The OPA244NA/3K1G4 supports rail-to-rail input (common-mode range includes V– and extends to V+ – 0.9 V), but its output swing is not rail-to-rail: it reaches within 0.1 V of V– and within 0.75 V of V+ under 20 kΩ load to ground. This asymmetry is documented in the Output Voltage specifications table. The OPA244NA/3K1G4 remains compatible with most single-supply ADC drivers where output headroom is managed via gain or reference selection.
Can the OPA244NA/3K1G4 drive capacitive loads without oscillation?
The OPA244NA/3K1G4 is unity-gain stable but exhibits increasing overshoot with capacitive loads: typical curves show ≤10% overshoot at 100 pF and G = +1 with RL = ∞. For loads >100 pF, isolation resistor (e.g., 10–50 Ω) between output and capacitance is recommended. The OPA244NA/3K1G4 datasheet provides small-signal step response plots confirming stability up to 100 pF; larger loads require external compensation per Application Information section.
What is the input offset voltage specification for the OPA244NA/3K1G4 at room temperature?
At TA = +25°C and VS = ±7.5 V, the OPA244NA/3K1G4 has a typical input offset voltage of ±1.5 mV, with a maximum of ±2 mV over the full –40°C to +85°C range. Production distribution data shows >90% of units fall within ±1 mV. This parameter is measured differentially between +In and –In pins and directly impacts DC accuracy in precision amplification stages using the OPA244NA/3K1G4.
Is the OPA244NA/3K1G4 pin-compatible with other members of the OPA244 family?
No - the OPA244NA/3K1G4 (single, SOT-23-5) is not pin-compatible with OPA2244 (dual, MSOP-8/SO-8) or OPA4244 (quad, TSSOP-14). Even within the single version, the SOT-23-5 pinout differs from SO-8 and DIP packages (e.g., pin 1 is –In in SOT-23-5 but NC in SO-8). The OPA244NA/3K1G4 pin assignment is unique to its 5-pin configuration and must be laid out accordingly per the DBV0005A package drawing.
OPA244NA/3K1G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Standard
- Number of Circuits:
- 1
- Output Type:
- Single-Ended
- Slew Rate:
- 0.16V/µs
- Gain Bandwidth Product:
- 430 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 nA
- Voltage - Input Offset:
- 700 mV
- Current - Supply:
- 50µA
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 2.6 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
OPA244NA/3K1G4 FAQ
1.How can I place an order for OPA244NA/3K1G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA244NA/3K1G4 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 OPA244NA/3K1G4 reliable?
The price and inventory of OPA244NA/3K1G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA244NA/3K1G4 is usually 5 days.
3.What payment methods are accepted for OPA244NA/3K1G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA244NA/3K1G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA244NA/3K1G4?
OPA244NA/3K1G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA244NA/3K1G4 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 OPA244NA/3K1G4?
For technical support, including OPA244NA/3K1G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA244NA/3K1G4 requirements.
6.How does Aetrix verify that OPA244NA/3K1G4 is sourced from the original manufacturer or authorized distributors?
All OPA244NA/3K1G4 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 OPA244NA/3K1G4 meets industry standards.
7.What is the process for return or replacement of OPA244NA/3K1G4?
All OPA244NA/3K1G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA244NA/3K1G4, 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 OPA244NA/3K1G4 part is unused and in its original packaging.
Return procedure for OPA244NA/3K1G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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