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Texas Instruments OPA353UA/2K5
- Part No.:
- OPA353UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA353UA/2K5.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,229
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Product details
Overview
OPA353UA/2K5 from Texas Instruments (formerly Burr-Brown) is a single, rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, single-supply operation (2.7V–5.5V). It delivers 44MHz gain-bandwidth, 22V/µs slew rate, 5nV/√Hz input voltage noise, rail-to-rail output swing within 10mV of supply rails (at 10kΩ), and 0.0006% THD+N - making it ideal for driving medium-speed sampling ADCs in space-constrained applications.
For engineers reviewing the OPA353UA/2K5 datasheet, OPA353UA/2K5 pinout, OPA353UA/2K5 application, or OPA353UA/2K5 equivalent, key selection considerations include its SO-8 package compatibility, guaranteed rail-to-rail performance down to 2.5V supply, 75Ω video line drive capability, and unity-gain stability with minimal external compensation.
Technical Context
The OPA353UA/2K5 employs a complementary N/P-channel input stage enabling true rail-to-rail input common-mode range extending 100mV beyond both supply rails, and a class AB common-source output stage delivering rail-to-rail output swing. Its 0.6µm CMOS process ensures low input bias current (±0.5pA typ) and low quiescent current (5.2mA typ per amplifier).
It is unity-gain stable and optimized for driving capacitive loads up to 100pF without external compensation, with small-signal settling time of 0.22µs (0.1%) and overload recovery under 0.1µs. The device operates across –40°C to +85°C and supports full specification compliance at 5V, 2.7V, and 5.5V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 44MHz - enables stable closed-loop operation up to ~40MHz at G=1, suitable for antialiasing filters and high-speed signal conditioning. |
| Slew Rate | 22V/µs - supports clean 2V step response in ≤0.22µs (0.1%), critical for driving SAR ADC inputs without distortion. |
| Input Voltage Noise Density | 5nV/√Hz @ 100kHz - preserves SNR in precision signal chains, especially when buffering low-level sensor or audio signals. |
| THD+N | 0.0006% @ 1kHz, RL=600Ω - meets high-fidelity audio and instrumentation requirements without post-processing correction. |
| Rail-to-Rail Output Swing | Within 10mV of V+ and V− @ 10kΩ load - maximizes dynamic range in 3.3V or 5V systems, e.g., directly interfacing with 12-bit ADC reference ranges. |
| Input Common-Mode Range | –0.1V to (V+) + 0.1V - allows direct sensing of signals near ground or supply rails, essential for single-supply current sensing and level-shifting. |
| Quiescent Current | 5.2mA typ @ VS=5V - balances speed and power efficiency for battery-powered portable instrumentation and IoT front-ends. |
Pinout & Package
OPA353UA/2K5 is housed in an 8-pin SOIC (SO-8) surface-mount package (Package Drawing D), with thermal resistance θJA = 150°C/W. Pin numbering follows standard SO-8 top-view orientation (pin 1 = bottom-left corner, counterclockwise).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (–In) | High-impedance differential input node; accepts signals from –0.1V to (V+) + 0.1V; protected by internal ESD diodes. |
| 2 | Non-Inverting Input (+In) | High-impedance differential input node; same common-mode range and protection as Pin 1. |
| 3 | Output (Out) | Class AB rail-to-rail output capable of ±40mA drive into resistive loads; stable with ≥100pF capacitive loads. |
| 4 | V– (Ground/–VS) | Negative supply terminal; must be bypassed with 0.01µF ceramic capacitor close to pin for stability. |
| 5 | V+ (+VS) | Positive supply terminal (2.7V–5.5V); same bypassing requirement as Pin 4; supports operation down to 2.5V. |
| 6 | NC | No connect - internally unconnected; must remain floating per datasheet. |
| 7 | NC | No connect - internally unconnected; must remain floating per datasheet. |
| 8 | NC | No connect - internally unconnected; must remain floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal utilization in 3.3V systems - e.g., digitizing 0–3.3V sensor outputs without level-shifting circuitry. |
| 44MHz GBW & 22V/µs slew rate | Supports accurate 12-bit ADC driving at ≥500kHz sampling rates while maintaining <0.1% settling error. |
| 5nV/√Hz input voltage noise | Preserves resolution in low-amplitude signal paths - e.g., microphone preamps or strain gauge bridges with <100µV output. |
| 0.0006% THD+N @ 1kHz | Meets broadcast-grade audio line driver specs and eliminates need for post-amplifier filtering in test equipment. |
| 75Ω video line drive capability | Directly drives composite video loads without external buffer transistors - verified per NTSC differential gain/phase specs. |
| Unity-gain stable, SO-8 package | Eliminates external compensation components; drop-in replacement for legacy SO-8 op amps in existing PCB layouts. |
Applications
| Cell Phone PA Control Loop | ADC Driver for Data Acquisition |
|---|---|
Use Scenario: Closed-loop control of RF power amplifier output in GSM/EDGE handsets using DC-coupled feedback. IC Role / Device Role / Timing Role: High-speed error amplifier comparing detected RF envelope to reference, operating from 2.85V battery supply. Use Value: Rail-to-rail I/O enables full use of 0–2.85V DAC reference range; 22V/µs slew rate ensures fast PA settling during burst-mode transmission. |
Use Scenario: Buffering and gain-setting stage before a 12-bit, 500kHz SAR ADC in portable data loggers. IC Role / Device Role / Timing Role: Low-noise, fast-settling driver isolating ADC input capacitance and absorbing charge kickback. Use Value: 0.22µs 0.1% settling guarantees accurate sampling at full rate; 5nV/√Hz noise avoids degrading effective number of bits (ENOB). |
| Composite Video Line Driver | Audio Line-Level Amplifier |
Use Scenario: Single-supply 75Ω driver for CVBS output in set-top boxes and security DVRs. IC Role / Device Role / Timing Role: G=2 non-inverting amplifier with AC-coupled input and DC-bias network for sync-tip clamping. Use Value: Verified 0.17% differential gain/phase error meets NTSC spec; rail-to-rail output swings ±1.4V into 75Ω without clipping. |
Use Scenario: Low-distortion line-out stage in USB DACs and portable audio players. IC Role / Device Role / Timing Role: Unity-gain buffer or G=2 amplifier driving 10kΩ headphones or line inputs. Use Value: 0.0006% THD+N ensures audibility threshold remains below –102dB; SO-8 footprint simplifies layout in tight audio PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA355UA/2K5 | Higher bandwidth (200MHz), higher supply current (9.5mA), same SO-8 package and rail-to-rail I/O. | Better suited for >10MHz signal paths (e.g., high-speed active filters), but less optimal for battery-powered low-power designs. | Select OPA355UA/2K5 only when >100MHz GBW is required; OPA353UA/2K5 offers better power/speed trade-off for ≤5MHz applications. |
| MCP6001T-E/OT | Lower bandwidth (1MHz), lower supply current (100µA), SOT-23-5 package, rail-to-rail I/O, but no 75Ω video drive validation. | Targeted at ultra-low-power sensor interfaces, not high-fidelity video/audio or fast ADC driving. | Choose MCP6001T-E/OT for sub-100kHz, µA-level power budgets; OPA353UA/2K5 remains preferred for speed-critical, low-noise roles. |
Compared with OPA355UA/2K5 and MCP6001T-E/OT, the OPA353UA/2K5 uniquely balances 44MHz bandwidth, 5nV/√Hz noise, and 5.2mA quiescent current in a standard SO-8 footprint - making it the optimal choice for cost-sensitive, space-constrained, medium-speed analog signal chains requiring verified video/audio performance.
Availability
OPA353UA/2K5 is available at Aetrix Electronics and suitable for cell phone PA control loops, ADC driver circuits, composite video line drivers, and audio line-level amplifiers requiring stable component supply and long-term production continuity.
Supply support for OPA353UA/2K5 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 full technical and manufacturing continuity for the OPA353 series. TI is a global semiconductor leader with deep expertise in precision analog ICs.
The OPA353 series belongs to TI's MicroAmplifier™ portfolio, designed specifically for low-cost, miniature, single-supply applications demanding rail-to-rail performance, low noise, and high speed - particularly in portable communications and data acquisition.
FAQ
What is the minimum supply voltage for reliable operation of the OPA353UA/2K5?
The OPA353UA/2K5 is fully specified from 2.7V to 5.5V, but functional operation is guaranteed down to 2.5V. At 2.5V, key parameters including gain-bandwidth (44MHz), slew rate (22V/µs), and rail-to-rail output swing remain valid per datasheet limits - enabling use in Li-ion battery-powered devices across full discharge range.
Does the OPA353UA/2K5 require external compensation for unity-gain stability?
No - the OPA353UA/2K5 is internally compensated and unity-gain stable. It drives ≥100pF capacitive loads in G=1 configuration without oscillation or peaking, as confirmed by typical performance curves and application notes. No external compensation capacitor is needed unless optimizing for specific settling behavior in high-Z feedback networks.
Can the OPA353UA/2K5 drive a 75Ω video load compliantly?
Yes - the OPA353UA/2K5 is explicitly characterized for 75Ω composite video line driving per NTSC standards, achieving 0.17% differential gain error and 0.17° differential phase error at G=2. Its rail-to-rail output delivers ±1.4V into 75Ω, meeting broadcast-level video signal integrity requirements without external buffers.
What are the NC pins on the OPA353UA/2K5 SO-8 package, and how should they be handled?
Pins 6, 7, and 8 on the OPA353UA/2K5 SO-8 package are no-connect (NC) terminals - internally unconnected and electrically isolated. They must remain unconnected on the PCB; routing traces or applying solder to these pins may compromise reliability or cause parametric shifts. Refer to TI's OPA353 datasheet Package Drawing D for mechanical confirmation.
How does the OPA353UA/2K5's rail-to-rail input stage behave near the supply rails?
The OPA353UA/2K5 uses complementary N/P-channel input pairs, creating a 400mV transition region near (V+) – 2.0V where both pairs conduct. Input signals crossing this region may exhibit minor gain variation; for critical precision applications, keep common-mode voltage ≥200mV away from (V+) – 2.0V or use the device in configurations where the input stays outside this zone - as detailed in Figure 2 of the OPA353 datasheet.
OPA353UA/2K5 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:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 22V/µs
- Gain Bandwidth Product:
- 44 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 3 mV
- 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
OPA353UA/2K5 FAQ
1.How can I place an order for OPA353UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA353UA/2K5 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 OPA353UA/2K5 reliable?
The price and inventory of OPA353UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA353UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA353UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA353UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA353UA/2K5?
OPA353UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA353UA/2K5 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 OPA353UA/2K5?
For technical support, including OPA353UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA353UA/2K5 requirements.
6.How does Aetrix verify that OPA353UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA353UA/2K5 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 OPA353UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA353UA/2K5?
All OPA353UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA353UA/2K5, 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 OPA353UA/2K5 part is unused and in its original packaging.
Return procedure for OPA353UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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