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Texas Instruments OPA244NA/250G4
- Part No.:
- OPA244NA/250G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA244NA/250G4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,929
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Product details
Overview
OPA244NA/250G4 from Texas Instruments (formerly Burr-Brown) is a single-channel, micropower, rail-to-rail output operational amplifier in SOT-23-5 package. It delivers 430kHz gain-bandwidth, 50µA/channel quiescent current, ±0.7mV input offset voltage (typ), and operates from +2.2V to +36V single supply - ideal for battery-powered current sensing and portable instrumentation.
For engineers reviewing the OPA244NA/250G4 datasheet, OPA244NA/250G4 pinout, OPA244NA/250G4 application, or OPA244NA/250G4 equivalent, key selection criteria include ultra-low IQ, wide supply range, unity-gain stability, ground-sensing input common-mode range, and SOT-23-5 footprint compatibility with space-constrained PCB layouts.
Technical Context
The OPA244NA/250G4 uses bipolar input stage architecture enabling low input bias current (–10nA typ), high CMRR (98dB), and stable operation across –40°C to +85°C. Its input common-mode range extends to V–, supporting true single-supply low-side sensing without level-shifting circuitry.
It achieves 0.16V/µs slew rate and 150µs settling time to 0.01% for 10V step, with overload recovery in 8µs. Output swing reaches (V+) – 0.75V and 0.1V above V– under 20kΩ load - critical for precision signal conditioning near supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 50µA per amplifier - enables multi-year battery life in always-on sensor nodes. |
| Gain-Bandwidth Product | 430kHz - supports DC-coupled signal chains up to ~100kHz with <1% gain error at unity gain. |
| Input Offset Voltage | ±0.7mV (typ) - ensures ≤7mV error in 10V full-scale measurement without trimming. |
| Common-Mode Input Range | 0V to (V+) – 0.9V - allows direct connection to ground-referenced shunt resistors in low-side current sensing. |
| Output Voltage Swing | (V+) – 0.75V / 0.1V - delivers >97% of rail-to-rail dynamic range into 20kΩ load. |
| Supply Voltage Range | +2.2V to +36V single supply - eliminates need for separate LDOs in industrial 24V or automotive 12V systems. |
| Input Voltage Noise Density | 22nV/√Hz @ 1kHz - suitable for µV-level signal amplification in precision transducer interfaces. |
Pinout & Package
SOT-23-5 surface-mount package (DBV), 1.45mm max height, RoHS-compliant, moisture sensitivity level 2 (260°C peak reflow).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (–In) | Differential input node; accepts signals down to V–; requires matched trace impedance for noise rejection. |
| 2 | Non-Inverting Input (+In) | Differential input node; common-mode range includes ground - enables single-supply sensor biasing. |
| 3 | Output (Out) | Class-AB output stage; drives capacitive loads up to 100pF with <10% overshoot at G=1. |
| 4 | Power Supply (V–) | Negative supply or ground reference; bypass with 0.01µF ceramic capacitor near pin. |
| 5 | Power Supply (V+) | Positive supply; supports up to +36V; internal ESD protection rated to 2000V HBM. |
Key Features
| Feature | Design Value |
|---|---|
| MicroPower Operation | 50µA IQ enables >10-year battery life in 200µA total system sleep current designs. |
| Unity-Gain Stable | No external compensation required - simplifies layout and reduces BOM count in buffer/gain stages. |
| Ground-Sensing Inputs | VCM includes V–, eliminating level shifters in low-side current monitoring circuits. |
| Wide Supply Range | +2.2V to +36V operation supports direct integration into legacy 24V industrial or modern Li-ion battery systems. |
| No Phase Inversion | Guaranteed linear behavior during input overdrive - prevents latch-up in transient-heavy environments. |
Applications
| Battery-Powered Current Monitoring | Portable Medical Sensor Interface |
|---|---|
|
Use Scenario: Real-time battery pack discharge current measurement using 10mΩ shunt resistor. IC Role / Device Role / Timing Role: Precision difference amplifier with gain = 100, converting mV shunt drop to 0–3.3V ADC input. Use Value: 50µA IQ minimizes self-heating error; ±0.7mV VOS limits full-scale error to <0.07% at 3.3V range. |
Use Scenario: Amplifying thermistor or strain gauge output in handheld pulse oximeter. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail output buffer driving SAR ADC with 12-bit resolution. Use Value: 22nV/√Hz input noise preserves µV-level signal integrity; 0.1V output headroom ensures full code utilization. |
| Industrial 24V Loop-Powered Transmitter | PCMCIA Card Signal Conditioning |
|
Use Scenario: Converting 4–20mA loop current to voltage for microcontroller analog input. IC Role / Device Role / Timing Role: High-impedance current-to-voltage converter with 250Ω sense resistor. Use Value: CMRR ≥98dB rejects common-mode noise on long industrial cables; 36V max supply handles loop transients. |
Use Scenario: Level-shifting and filtering analog audio signals in PCMCIA modem cards. IC Role / Device Role / Timing Role: Single-supply active filter stage operating from +3.3V or +5V host power. Use Value: SOT-23-5 footprint saves board area; 430kHz GBW supports anti-aliasing up to 50kHz. |
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 IQ (80µA), lower VOS (±0.3mV), same SOT-23-5 package. | Better DC accuracy but higher power draw - unsuitable for multi-year battery life targets. | Select when offset drift (<1µV/°C) and tighter initial VOS outweigh micropower needs. |
| LMV321IDBVR | Lower cost, CMOS input (pA bias), 1MHz GBW, but only 2.7–5.5V supply range. | Cannot replace OPA244NA/250G4 in 24V industrial or wide-supply applications. | Choose for 3.3V/5V consumer electronics where rail-to-rail I/O and low cost are primary. |
Compared with OPA344UA and LMV321IDBVR, the OPA244NA/250G4 uniquely balances ultra-low IQ, 36V supply tolerance, and ground-sensing capability - making it irreplaceable in wide-input-range, battery-critical industrial sensing.
Availability
OPA244NA/250G4 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and industrial 24V loop-powered transmitters requiring stable component supply and long-term lifecycle support.
Supply support for OPA244NA/250G4 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, emphasizing high-performance, low-power, and robust industrial-grade signal conditioning ICs.
The OPA244NA/250G4 belongs to the MicroAmplifier™ series, designed specifically for micropower, single-supply operation in space- and energy-constrained instrumentation and portable equipment.
FAQ
What is the maximum supply voltage for the OPA244NA/250G4?
The OPA244NA/250G4 supports a maximum supply voltage of +36V on V+ relative to V–. Absolute maximum ratings specify V+ to V– ≤ 36V, with input voltage range limited to (V–) – 0.3V to (V+) + 0.3V. Exceeding these values risks permanent damage. The OPA244NA/250G4 is fully specified from +2.6V to +36V, maintaining performance across this entire range.
Does the OPA244NA/250G4 support true rail-to-rail input?
No - the OPA244NA/250G4 features rail-to-rail *output*, but its input common-mode range extends only to V– (ground) and up to (V+) – 0.9V. This "ground-sensing" capability enables low-side current sensing without level shifters, but it does not accept inputs at the positive rail. The OPA244NA/250G4 input stage is bipolar, not CMOS, so full rail-to-rail input is not supported.
Can the OPA244NA/250G4 drive capacitive loads?
Yes - the OPA244NA/250G4 can safely drive up to 100pF capacitive loads with minimal overshoot (<10%) at unity gain, as verified in typical performance curves. For larger loads, external isolation resistance (e.g., 10–50Ω in series with output) is recommended to maintain stability. The OPA244NA/250G4 is unity-gain stable and does not require additional compensation capacitors.
What is the thermal resistance (θJA) of the OPA244NA/250G4 in SOT-23-5 package?
The junction-to-ambient thermal resistance (θJA) for the OPA244NA/250G4 in SOT-23-5 (DBV) package is 200°C/W under standard JEDEC test conditions (single-layer 1-in² copper pad). This value assumes no additional copper pour or thermal vias. With proper PCB layout - including thermal vias and 2-in² copper area - θJA can be reduced to ~120°C/W, allowing continuous operation at ambient temperatures up to +75°C at full 36V supply.
Is the OPA244NA/250G4 pin-compatible with other OPA244 variants?
Yes - the OPA244NA/250G4 (SOT-23-5) shares identical pinout with all other OPA244 single-amplifier variants in the same package, including OPA244NA/250 and OPA244NA/3K. However, it is *not* pin-compatible with SO-8 or DIP versions (OPA244UA, OPA244PA), which use different pin assignments and footprints. Always verify package drawing DBV0005A before PCB layout.
OPA244NA/250G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.16V/µs
- Gain Bandwidth Product:
- 430 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 nA
- Voltage - Input Offset:
- 700 µV
- Current - Supply:
- 50µA
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 2.2 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/250G4 FAQ
1.How can I place an order for OPA244NA/250G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA244NA/250G4 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/250G4 reliable?
The price and inventory of OPA244NA/250G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA244NA/250G4 is usually 5 days.
3.What payment methods are accepted for OPA244NA/250G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA244NA/250G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA244NA/250G4?
OPA244NA/250G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA244NA/250G4 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/250G4?
For technical support, including OPA244NA/250G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA244NA/250G4 requirements.
6.How does Aetrix verify that OPA244NA/250G4 is sourced from the original manufacturer or authorized distributors?
All OPA244NA/250G4 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/250G4 meets industry standards.
7.What is the process for return or replacement of OPA244NA/250G4?
All OPA244NA/250G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA244NA/250G4, 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/250G4 part is unused and in its original packaging.
Return procedure for OPA244NA/250G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA244NA/250G4 Tags
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LM358DT
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LM358DR
Texas Instruments
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