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Texas Instruments OPA244UA
- Part No.:
- OPA244UA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA244UA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,483
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Product details
Overview
OPA244UA from Texas Instruments (formerly Burr-Brown) is a single, rail-to-rail input micro-power operational amplifier in SOIC-8 package, delivering 430kHz gain-bandwidth, 50µA/channel quiescent current, and operation from +2.2V to +36V single supply - ideal for battery-powered instrumentation and portable sensor signal conditioning.
For engineers reviewing the OPA244UA datasheet, OPA244UA pinout, OPA244UA application, or OPA244UA 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 output swing to within 0.75V of V+ and 0.1V of V– under 20kΩ load.
Technical Context
The OPA244UA employs a CMOS input stage enabling ultra-low input bias current (–25nA typ), high input impedance (10⁹ Ω || 2pF), and rail-to-rail input voltage range including ground. Its internal compensation ensures unity-gain stability without external components.
It features no phase inversion under overdrive and maintains stable performance across its full 2.2V–36V supply range, with key parameters like GBW, CMRR (84dB min), and PSRR (50µV/V max) specified over temperature and voltage - supporting robust design in variable-battery environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 430kHz - supports stable amplification up to ~400kHz at unity gain for low-frequency sensor and power monitoring circuits. |
| Quiescent Current | 50µA per amplifier - enables multi-year battery life in always-on portable devices such as gas sensors or wearable health monitors. |
| Supply Voltage Range | +2.2V to +36V single supply - accommodates wide-input industrial power rails and aging alkaline or Li-ion battery stacks without regulation. |
| Input Common-Mode Range | 0V to (V+) – 0.9V - allows direct interfacing with ground-referenced transducers and single-supply ADC drivers. |
| Output Voltage Swing | V+ – 0.75V / 0.1V above V– (RL = 20kΩ to ground) - maximizes dynamic range in low-voltage systems while retaining headroom for feedback stability. |
| Input Offset Voltage | ±1.5mV (typ), ±2mV (max over –40°C to +85°C) - suitable for precision DC-coupled amplification in thermocouple or strain gauge front-ends. |
| Open-Loop Gain | 86dB (min) - ensures <0.1% gain error in closed-loop configurations with gains ≤100. |
Pinout & Package
OPA244UA is housed in an 8-pin SOIC (SO-8) surface-mount package (JEDEC MS-012AA, TI drawing D), with thermal resistance θJA = 150°C/W. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (–In) | Differential input node; accepts signals referenced to ground or mid-supply; high-impedance CMOS input. |
| 2 | Non-Inverting Input (+In) | Differential input node; supports rail-to-rail common-mode range down to V–. |
| 3 | Output (Out) | Class AB output stage; drives loads ≥20kΩ to achieve full specified swing; stable into 100pF. |
| 4 | V– (Negative Supply) | Ground or negative rail connection; input common-mode extends to this pin. |
| 5 | V+ (Positive Supply) | Single or positive rail connection; supports up to +36V; bypass with 0.01µF ceramic capacitor. |
| 6–8 | No Connect (NC) | Unused pins; electrically isolated; must remain unconnected per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| MicroPower Operation | 50µA IQ enables >5-year battery life in coin-cell-powered IoT nodes with wake-on-event architecture. |
| Rail-to-Rail Input | Common-mode range includes V–, eliminating level-shifting needs for ground-sensed currents or low-side shunt amplifiers. |
| Unity-Gain Stable | No external compensation required - simplifies layout and reduces BOM count in gain-of-1 buffers and active filters. |
| No Phase Inversion | Prevents latch-up or runaway in overdriven conditions - critical for fault-tolerant battery protection and motor control feedback paths. |
| Wide Supply Range | Operates from 2.2V (single AA) to 36V (industrial 24V bus), reducing need for multiple op-amp families across product variants. |
Applications
| Battery Current Sensing | Portable Medical Instrumentation |
|---|---|
Use Scenario: High- and low-side current measurement in rechargeable battery packs using shunt resistors. IC Role / Device Role / Timing Role: Precision differential amplifier configured as current-sense amplifier with fixed gain (e.g., 10×). Use Value: Delivers accurate current readout over full battery voltage range (2.2V–36V) and temperature (–40°C to +85°C) with <2mV offset drift. | Use Scenario: Amplifying low-amplitude biopotential signals (ECG, EMG) in handheld diagnostic devices. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer with high input impedance and low noise. Use Value: 22nV/√Hz input voltage noise and 40fA/√Hz current noise preserve signal integrity from microvolt-level electrodes. |
| PCMCIA Card Signal Conditioning | Industrial Power Supply Monitoring |
Use Scenario: Signal conditioning for analog I/O on legacy PCMCIA cards with tight space and power constraints. IC Role / Device Role / Timing Role: Single-supply op-amp for sensor interface, level shifting, and anti-alias filtering. Use Value: SOIC-8 footprint and 50µA IQ meet PCMCIA Type II mechanical and thermal limits while maintaining DC accuracy. | Use Scenario: Monitoring output voltage and current in programmable bench power supplies and DC-DC modules. IC Role / Device Role / Timing Role: Feedback amplifier in voltage/current regulation loops and safety cutoff comparators. Use Value: Guaranteed 86dB open-loop gain and 430kHz GBW ensure loop stability and fast transient response under varying load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2340UA | Higher IQ (250µA), rail-to-rail output (not input), 5.5MHz GBW - faster but less power-efficient. | Better for AC-coupled, higher-speed signal chains where output swing to both rails is essential. | Select OPA2340UA only when >1MHz bandwidth and rail-to-rail output are required; otherwise OPA244UA saves >80% supply current. |
| LMV321IDBVR | Lower IQ (80µA), narrower supply range (2.7V–5.5V), 1MHz GBW - optimized for 3.3V logic domains. | Suitable for low-voltage digital sensor interfaces but cannot replace OPA244UA in 12V/24V industrial or battery-stack applications. | Choose LMV321IDBVR for cost-sensitive, 3.3V-only designs; avoid where supply exceeds 5.5V or extended temperature range is needed. |
Compared with OPA2340UA and LMV321IDBVR, the OPA244UA uniquely balances ultra-low quiescent current, wide supply range, and rail-to-rail input capability - making it irreplaceable in multi-voltage battery management and universal industrial analog front-ends.
Availability
OPA244UA is available at Aetrix Electronics and suitable for battery-powered systems, portable medical devices, and industrial power supply monitoring requiring stable component supply across extended temperature and voltage ranges.
Supply support for OPA244UA 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 industrial-grade signal conditioning ICs.
The OPA244UA belongs to the MicroAmplifier™ series, designed specifically for space- and power-constrained applications demanding precision DC performance, rail-to-rail input, and wide supply flexibility - especially in portable instrumentation and energy-harvesting systems.
FAQ
What is the maximum operating supply voltage for the OPA244UA?
The OPA244UA supports a maximum supply voltage of +36V on the V+ pin relative to V–, with absolute maximum ratings specifying V+ to V– ≤ 36V. It operates reliably across the full +2.2V to +36V single-supply range, and also supports dual supplies from ±1.1V to ±18V. This wide range makes the OPA244UA suitable for both low-voltage portable devices and high-voltage industrial systems without redesign.
Does the OPA244UA require external compensation for unity-gain stability?
No, the OPA244UA is internally compensated and unity-gain stable - no external capacitors or resistors are needed for stable operation at gain = 1. This is confirmed in the Applications Information section of the datasheet and validated across temperature and supply voltage. The OPA244UA maintains phase margin >45° under all specified conditions, eliminating risk of oscillation in buffer or follower configurations.
Can the OPA244UA drive capacitive loads, and what is its recommended maximum?
The OPA244UA is characterized for stability with capacitive loads up to 100pF when driving a 20kΩ load (per typical curves). For larger capacitive loads (>100pF), isolation resistance (e.g., 10–100Ω in series with the output) is recommended to maintain stability. The device's slew rate (±0.16V/µs) and GBW (430kHz) limit large-signal settling into heavy capacitive loads, so careful layout and local decoupling are advised in high-CL applications.
What is the input offset voltage drift specification for the OPA244UA over temperature?
The OPA244UA has a maximum input offset voltage drift of ±4µV/°C over the –40°C to +85°C temperature range. This value is guaranteed in the datasheet's "vs Temperature" row under OFFSET VOLTAGE. Typical production distribution shows most units exhibit <3µV/°C drift, supporting stable DC gain accuracy in uncalibrated temperature-varying environments such as outdoor sensor nodes or automotive cabin modules.
Is the OPA244UA RoHS-compliant and lead-free?
Yes, the OPA244UA is RoHS-compliant and lead-free, with "Green (RoHS & no Sb/Br)" eco plan designation and NIPDAU (nickel-palladium-gold) lead finish. Its MSL rating is Level-3 (260°C peak, 168-hour floor life), and it meets JEDEC J-STD-020 moisture sensitivity requirements. Full compliance documentation, including material declarations and test reports, is available via Texas Instruments' Quality & Environmental page.
OPA244UA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 8-SOIC
OPA244UA FAQ
1.How can I place an order for OPA244UA through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA244UA 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 OPA244UA reliable?
The price and inventory of OPA244UA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA244UA is usually 5 days.
3.What payment methods are accepted for OPA244UA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA244UA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA244UA?
OPA244UA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA244UA 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 OPA244UA?
For technical support, including OPA244UA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA244UA requirements.
6.How does Aetrix verify that OPA244UA is sourced from the original manufacturer or authorized distributors?
All OPA244UA 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 OPA244UA meets industry standards.
7.What is the process for return or replacement of OPA244UA?
All OPA244UA units undergo pre-shipment inspection (PSI). If there is an issue with OPA244UA, 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 OPA244UA part is unused and in its original packaging.
Return procedure for OPA244UA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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