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Texas Instruments OPA244NA/3KG4
- Part No.:
- OPA244NA/3KG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA244NA/3KG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,253
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Product details
Overview
OPA244NA/3KG4 from Texas Instruments (formerly Burr-Brown) is a single-channel, rail-to-rail input micro-power operational amplifier in SOT-23-5 package. It delivers 430kHz gain-bandwidth, 50µA/channel quiescent current, and operates from +2.2V to +36V single supply - ideal for battery-powered instrumentation and portable sensing circuits requiring low power and wide voltage range.
For engineers reviewing the OPA244NA/3KG4 datasheet, OPA244NA/3KG4 pinout, OPA244NA/3KG4 application, or OPA244NA/3KG4 equivalent, key selection criteria include its guaranteed 50µA IQ over –40°C to +85°C, input common-mode range extending to V–, unity-gain stability, and compatibility with high-impedance sensor interfaces and precision current-sense topologies.
Technical Context
The OPA244NA/3KG4 employs a CMOS input stage enabling ultra-low input bias current (–25nA typ) and high input impedance (10⁹ Ω || 2pF), supporting high-source-impedance transducer interfaces. Its internal compensation ensures unity-gain stability without external components across the full supply range.
It features rail-to-rail input operation (VCM = 0 to V+ – 0.9V) and output swing to within 0.75V of rails under 20kΩ load, with overload recovery time of 8µs and no phase inversion - critical for robust operation in overdriven sensor front-ends and battery-monitoring systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 50 µA per amplifier - enables multi-year battery life in always-on portable sensors. |
| Gain-Bandwidth Product | 430 kHz - supports DC-coupled signal conditioning up to ~100Hz with >60dB loop gain. |
| Input Offset Voltage | ±1.5 mV (typ) - suitable for 12-bit precision measurement without trimming in cost-sensitive designs. |
| Supply Range | +2.2V to +36V single supply - eliminates need for dual supplies in industrial and automotive battery monitoring. |
| Input Common-Mode Range | Includes ground (0V) - allows direct interfacing with shunt-based current sense at low-side or high-side configurations. |
| Output Voltage Swing | Within 0.75V of rails (RL = 20kΩ to ground) - maximizes dynamic range in low-voltage microcontroller ADC interfaces. |
| Temperature Range | –40°C to +85°C specified - qualified for industrial and automotive cabin applications. |
Pinout & Package
SOT-23-5 surface-mount package (DBV), 1.45mm max height, RoHS-compliant, moisture sensitivity level MSL-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No connect | Unused terminal; must be left floating or tied to ground per layout best practice. |
| 2 (V–) | Negative supply | Ground reference for single-supply operation; accepts 0V or negative rail in dual-supply mode. |
| 3 (Out) | Amplifier output | Capable of sourcing ±12mA short-circuit current; drives capacitive loads up to 100pF with stable step response. |
| 4 (NC) | No connect | Unused terminal; no internal connection - leave unconnected. |
| 5 (V+) | Positive supply | Accepts +2.2V to +36V; bypassing with 0.01µF ceramic capacitor recommended near pin. |
| 6 (–In) | Inverting input | High-impedance CMOS node; input bias current ≤ –25nA enables high-R feedback networks. |
| 7 (+In) | Non-inverting input | Common-mode range includes V–; supports ground-referenced sensor inputs without level-shifting. |
Key Features
| Feature | Design Value |
|---|---|
| MicroPower operation | 50µA IQ enables >10-year battery life in coin-cell-powered IoT nodes with 10µA sleep current budgets. |
| Rail-to-rail input | VCM extends to V– (ground), eliminating need for level-shifting in low-side current sensing and single-supply thermistor interfaces. |
| Unity-gain stable | No external compensation required - simplifies design of buffer, gain-of-one, and active filter stages. |
| No phase inversion | Prevents latch-up or oscillation during input overdrive - essential for robust operation in fault-prone battery pack monitoring. |
| Wide supply range | Operates from +2.2V (single Li-ion cell) to +36V (industrial 24V bus), reducing BOM count across product families. |
Applications
| Battery Pack Monitoring | Portable Medical Sensors |
|---|---|
Use Scenario: Real-time current and voltage monitoring in multi-cell lithium-ion battery packs using shunt resistors. IC Role / Device Role / Timing Role: Precision current-sense amplifier in high-side or low-side configuration with 10ppm/°C offset drift stability. Use Value: Enables accurate state-of-charge estimation over temperature with <±2mV total input error at 85°C. | Use Scenario: Signal conditioning for low-level biopotential signals (ECG, pulse oximetry) in handheld diagnostic devices. IC Role / Device Role / Timing Role: Low-noise, low-power front-end amplifier with 22nV/√Hz input voltage noise density at 1kHz. Use Value: Preserves SNR in 0.5–40Hz bandwidth while consuming <50µA - extends AA battery life to >12 months. |
| Industrial Sensor Transmitters | PCMCIA Card Power Management |
Use Scenario: 4–20mA loop transmitter for pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Voltage-to-current converter core with rail-to-rail input enabling zero-input offset calibration. Use Value: Supports 3.3V microcontroller DAC outputs directly without level-shifting, reducing component count by 2–3 parts. | Use Scenario: Power sequencing and voltage supervision in legacy PCMCIA cards operating from 3.3V or 5V host buses. IC Role / Device Role / Timing Role: Precision comparator and reference buffer with 50µA supply current and 150µs 0.01% settling time. Use Value: Meets PCMCIA JEIDA v2.0 power-up timing requirements while minimizing standby leakage in hot-plug scenarios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2442IDR | Higher IQ (125µA), lower GBW (220kHz), SO-8 only - no SOT-23 option. | Less suitable for ultra-low-power battery applications; better for higher-speed, non-battery use cases. | Select when higher drive capability (60mA short-circuit) is needed and power budget allows >2× IQ. |
| MCP6001T-I/OT | Lower IQ (9µA), narrower supply (1.8–6V), SOT-23-5 - but only 1MHz GBW and no extended temp rating. | Restricted to low-voltage consumer electronics; not rated for industrial –40°C to +85°C operation. | Select only for sub-6V, cost-sensitive, non-industrial applications where 1MHz bandwidth suffices. |
Compared with TLV2442IDR and MCP6001T-I/OT, the OPA244NA/3KG4 uniquely balances ultra-low IQ (50µA), wide supply (2.2–36V), industrial temperature rating, and SOT-23-5 footprint - making it the only choice for space-constrained, wide-input-voltage, long-life battery monitoring systems.
Availability
OPA244NA/3KG4 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and industrial sensor transmitters requiring stable component supply with guaranteed long-term availability.
Supply support for OPA244NA/3KG4 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, including high-reliability op amps for industrial, automotive, and medical applications.
The OPA244 series belongs to TI's MicroAmplifier™ family, designed specifically for ultra-low-power, wide-supply, precision signal conditioning in space- and energy-constrained systems.
FAQ
What is the maximum capacitive load the OPA244NA/3KG4 can drive while remaining stable?
The OPA244NA/3KG4 is unity-gain stable and supports capacitive loads up to 100pF with minimal overshoot (<10%) when driving into RL = 20kΩ. For loads >100pF, external isolation resistor (e.g., 10–50Ω) between output and capacitance is recommended. This behavior is verified in Figure 12 of the SBOS088 datasheet and applies directly to the OPA244NA/3KG4 in SOT-23-5 package.
Does the OPA244NA/3KG4 require external compensation for unity-gain operation?
No - the OPA244NA/3KG4 is internally compensated for unity-gain stability across its entire supply range (+2.2V to +36V) and temperature range (–40°C to +85°C). No external capacitors or resistors are needed for stable G = 1 operation, as confirmed in the Applications Information section of the OPA244 datasheet (SBOS088).
What is the input common-mode voltage range of the OPA244NA/3KG4, and why does it matter for single-supply designs?
The OPA244NA/3KG4 has an input common-mode range from V– (ground) to (V+) – 0.9V. This rail-to-rail input capability allows direct connection of ground-referenced sensors (e.g., shunt resistors, thermistors) without level-shifting circuitry - a critical advantage for low-cost, low-component-count single-supply battery monitoring systems using the OPA244NA/3KG4.
How does the quiescent current of the OPA244NA/3KG4 vary with supply voltage and temperature?
The OPA244NA/3KG4 maintains tightly regulated IQ: 50µA typ at +25°C and +15V, rising to 70µA max over –40°C to +85°C. It shows negligible variation across +2.6V to +36V supply range, as shown in Figure 7 of SBOS088. This stable, low IQ makes the OPA244NA/3KG4 predictable for battery life modeling in long-duration deployments.
Is the OPA244NA/3KG4 pin-compatible with other members of the OPA244 family, such as the OPA2244 or OPA4244?
No - the OPA244NA/3KG4 is a single-channel device in SOT-23-5, while OPA2244 (dual) uses MSOP-8 or SO-8, and OPA4244 (quad) uses TSSOP-14. Pin count, pinout, and package dimensions differ fundamentally. Substitution requires PCB redesign; only functional equivalence (not pin compatibility) exists among OPA244-series variants.
OPA244NA/3KG4 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/3KG4 FAQ
1.How can I place an order for OPA244NA/3KG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA244NA/3KG4 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/3KG4 reliable?
The price and inventory of OPA244NA/3KG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA244NA/3KG4 is usually 5 days.
3.What payment methods are accepted for OPA244NA/3KG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA244NA/3KG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA244NA/3KG4?
OPA244NA/3KG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA244NA/3KG4 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/3KG4?
For technical support, including OPA244NA/3KG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA244NA/3KG4 requirements.
6.How does Aetrix verify that OPA244NA/3KG4 is sourced from the original manufacturer or authorized distributors?
All OPA244NA/3KG4 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/3KG4 meets industry standards.
7.What is the process for return or replacement of OPA244NA/3KG4?
All OPA244NA/3KG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA244NA/3KG4, 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/3KG4 part is unused and in its original packaging.
Return procedure for OPA244NA/3KG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA244NA/3KG4 Tags
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