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Texas Instruments OPA350UA/2K5G4
- Part No.:
- OPA350UA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA350UA/2K5G4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,195
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Product details
Overview
OPA350UA/2K5G4 from Texas Instruments is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, single-supply operation. It delivers 38 MHz gain-bandwidth, 22 V/µs slew rate, and 5 nV/√Hz input voltage noise, enabling high-fidelity signal conditioning in space-constrained systems such as portable A/D converter front-ends and video driver circuits.
For engineers reviewing the OPA350UA/2K5G4 datasheet, OPA350UA/2K5G4 pinout, OPA350UA/2K5G4 application, or OPA350UA/2K5G4 equivalent, key selection criteria include its 2.7–5.5 V supply range, ±40 mA output drive capability, 0.0006% THD+N at 1 kHz, and guaranteed rail-to-rail output swing within 10 mV of both rails under 10 kΩ load.
Technical Context
The OPA350UA/2K5G4 employs a complementary N/P-channel input stage enabling true rail-to-rail input common-mode range (−0.1 V to V+ + 0.1 V), with laser-trimmed offset to minimize transition-region distortion. Its class AB output stage supports 600 Ω drive capability while maintaining <10 mV output swing from rails at light loads.
Designed for unity-gain stability, it achieves 38 MHz GBW and 22 V/µs slew rate with only 5.2 mA quiescent current per amplifier. Harmonic distortion remains below −100 dBc up to 100 kHz at G = 1, VO = 2.5 VPP, RL = 600 Ω - critical for precision video and audio signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 38 MHz - enables stable closed-loop gain ≥10 at >3.8 MHz, suitable for anti-aliasing filters ahead of 500 kSPS ADCs. |
| Slew rate | 22 V/µs - supports full-scale 2.5 VPP output transitions in ≤114 ns without slewing-induced distortion. |
| Input voltage noise density | 5 nV/√Hz at 10 kHz - preserves SNR in low-level sensor amplification and audio preamp stages. |
| Total harmonic distortion + noise | 0.0006% at 1 kHz, RL = 600 Ω - meets broadcast-grade video (75 Ω) and CD-quality audio line-driver requirements. |
| Output voltage swing | Within 10 mV of V+ and V− at RL = 10 kΩ - maximizes dynamic range in 3.3 V or 5 V single-supply systems. |
| Supply voltage range | 2.7 V to 5.5 V - operates from Li-ion battery (3.0–4.2 V) or regulated 3.3 V/5 V rails without level-shifting. |
| Quiescent current | 5.2 mA per amplifier - balances speed and power for battery-powered instrumentation and portable test gear. |
Pinout & Package
OPA350UA/2K5G4 is housed in an SOIC-8 (D) package measuring 3.91 mm × 4.90 mm, optimized for automated assembly and thermal performance (RθJA = 140.1°C/W).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No connect (NC) | Internally unconnected; must be left floating or tied to ground per layout best practices. |
| 2 | Inverting input (−In) | Differential input node; accepts signals from −0.1 V to V+ + 0.1 V with rail-to-rail common-mode range. |
| 3 | Noninverting input (+In) | Differential input node; identical common-mode range and bias current (±0.5 pA typ) as Pin 2. |
| 4 | Negative supply (V−) | Ground reference for single-supply operation; supports operation with V− = 0 V (GND). |
| 5 | No connect (NC) | Internally unconnected; no external connection required. |
| 6 | Output (Out) | Class AB rail-to-rail output capable of ±40 mA continuous drive into 600–10 kΩ loads. |
| 7 | Positive supply (V+) | Single-supply input; accepts 2.7–5.5 V; bypass with 0.01 µF ceramic capacitor close to Pin 7 and Pin 4. |
| 8 | No connect (NC) | Internally unconnected; leave unconnected per TI recommended layout. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Common-mode range extends −0.1 V to V+ + 0.1 V - eliminates level-shifting in 3.3 V microcontroller I/O interfacing. |
| Rail-to-rail output | Swings to within 10 mV of both supply rails at 10 kΩ load - preserves >99.6% of available voltage headroom. |
| Low THD+N | 0.0006% at 1 kHz - ensures minimal harmonic contamination in video DAC buffers and audio line drivers. |
| 75 Ω video drive | Specified differential gain/phase error (0.17%/0.17°) - meets NTSC/PAL broadcast video timing fidelity requirements. |
| Unity-gain stable | No external compensation required - simplifies design of gain-of-1 buffers, active filters, and ADC drivers. |
Applications
| Cell Phone PA Control Loop | Driving A/D Converters |
|---|---|
|
Use Scenario: Closed-loop feedback path controlling RF power amplifier output in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Precision DC-coupled error amplifier comparing detected PA output against reference voltage. Use Value: Rail-to-rail input allows direct sensing of 0–3.3 V detector output; low offset (±150 µV typ) minimizes control loop drift. |
Use Scenario: Buffering analog sensor signals before sampling by medium-speed SAR ADCs (e.g., ADS7861). IC Role / Device Role / Timing Role: High-speed, low-noise unity-gain buffer isolating ADC input capacitance and absorbing charge kickback. Use Value: 22 V/µs slew rate settles 2.5 VPP step in <0.5 µs (0.01%); 38 MHz GBW maintains flat frequency response up to 500 kHz. |
| Video Processing | Audio Processing |
|
Use Scenario: Driving 75 Ω coaxial video lines in portable media players or HDMI transmitter front-ends. IC Role / Device Role / Timing Role: Composite video (CVBS) or Y/C line driver with DC restoration and gain control. Use Value: Differential gain/phase error of 0.17%/0.17° meets NTSC broadcast spec; 600 Ω drive capability supports legacy video standards. |
Use Scenario: Low-noise line-level preamplifier and headphone driver in portable audio codecs. IC Role / Device Role / Timing Role: Single-supply audio op-amp providing gain, filtering, and output buffering with minimal added noise. Use Value: 5 nV/√Hz input voltage noise preserves SNR in 24-bit audio paths; 0.0006% THD+N ensures transparent signal reproduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA365AIDBVR | Higher GBW (50 MHz), lower noise (4.5 nV/√Hz), but higher IQ (8.5 mA) and narrower supply range (2.2–5.5 V). | Better suited for >1 MSPS ADC drivers and wideband active filters where speed outweighs power budget. | Select OPA365AIDBVR when bandwidth >40 MHz is required and quiescent current >5 mA is acceptable. |
| MCP6001T-E/OT | Lower speed (1 MHz GBW), higher offset (1.5 mV max), but ultra-low IQ (100 µA) and wider temp range (−40°C to 125°C). | Targeted at cost-sensitive, low-power sensor interfaces where precision and speed are secondary to battery life. | Select MCP6001T-E/OT for always-on sensor nodes or industrial monitoring where 38 MHz bandwidth is unnecessary. |
Compared with OPA350UA/2K5G4, OPA365AIDBVR trades higher power for greater bandwidth and lower noise, while MCP6001T-E/OT sacrifices speed and precision for micropower operation - making OPA350UA/2K5G4 the balanced choice for high-fidelity, medium-speed, single-supply signal chains.
Availability
OPA350UA/2K5G4 is available at Aetrix Electronics and suitable for cell phone PA control loops, A/D converter driving, and video processing applications requiring stable component supply across industrial temperature ranges (−40°C to 85°C) and long-term production continuity.
Supply support for OPA350UA/2K5G4 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 over 90 years of innovation in precision analog ICs and broad portfolio support for industrial, automotive, and communications markets.
The OPA350 series belongs to TI's MicroAmplifier™ line, designed specifically for low-voltage, rail-to-rail signal conditioning in portable, space-constrained, and high-fidelity applications including data acquisition, video, and audio systems.
FAQ
What supply voltage range does the OPA350UA/2K5G4 support?
The OPA350UA/2K5G4 operates from a single supply of 2.7 V to 5.5 V, with functional operation down to 2.5 V. This range supports direct integration with 3.3 V microcontrollers and Li-ion battery-powered systems without external regulation. All electrical specifications in the datasheet are guaranteed across the 2.7–5.5 V range at temperatures from −40°C to 85°C.
Is the OPA350UA/2K5G4 unity-gain stable?
Yes, the OPA350UA/2K5G4 is explicitly unity-gain stable and requires no external compensation components. Its internal compensation ensures phase margin >60° in G = 1 configurations, even when driving capacitive loads up to 100 pF. This makes it ideal for buffer, active filter, and ADC driver applications where simplicity and reliability are critical.
What is the output voltage swing specification for the OPA350UA/2K5G4?
The OPA350UA/2K5G4 delivers rail-to-rail output swing: typically within 10 mV of both V+ and V− when loaded with 10 kΩ, and within 25–200 mV under 1 kΩ loads depending on output current. This performance is maintained across the full −40°C to 85°C temperature range, maximizing usable dynamic range in low-voltage systems.
Does the OPA350UA/2K5G4 support rail-to-rail input?
Yes, the OPA350UA/2K5G4 features true rail-to-rail input with a common-mode voltage range extending from −0.1 V to V+ + 0.1 V. This is achieved via a complementary N/P-channel input stage, enabling direct interface with sensors, DACs, or microcontroller outputs operating at the supply rails - eliminating the need for external level-shifting circuitry.
What is the total harmonic distortion + noise (THD+N) performance of the OPA350UA/2K5G4?
The OPA350UA/2K5G4 achieves 0.0006% THD+N at 1 kHz, RL = 600 Ω, VO = 2.5 VPP, and G = 1. This corresponds to −104 dBc harmonic content, meeting broadcast video (NTSC/PAL) and CD-quality audio line-driver requirements. Performance remains below −80 dBc up to 100 kHz under identical conditions.
OPA350UA/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 22V/µs
- Gain Bandwidth Product:
- 38 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 5.2mA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA350UA/2K5G4 FAQ
1.How can I place an order for OPA350UA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA350UA/2K5G4 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 OPA350UA/2K5G4 reliable?
The price and inventory of OPA350UA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA350UA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA350UA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA350UA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA350UA/2K5G4?
OPA350UA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA350UA/2K5G4 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 OPA350UA/2K5G4?
For technical support, including OPA350UA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA350UA/2K5G4 requirements.
6.How does Aetrix verify that OPA350UA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA350UA/2K5G4 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 OPA350UA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA350UA/2K5G4?
All OPA350UA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA350UA/2K5G4, 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 OPA350UA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA350UA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA350UA/2K5G4 Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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