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Texas Instruments OPA355UA/2K5
- Part No.:
- OPA355UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA355UA/2K5.pdf
- Description:
- IC CMOS 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,498
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Product details
Overview
OPA355UA/2K5 from Texas Instruments is a single-channel, high-speed, rail-to-rail output CMOS operational amplifier with shutdown functionality, designed for video and wideband signal conditioning. It delivers 450 MHz unity-gain bandwidth, 200 MHz gain-bandwidth product, 5.8 nV/√Hz input voltage noise, and differential gain/phase of 0.02% / 0.05° - enabling precision NTSC video buffering in broadcast and medical imaging systems.
For engineers reviewing the OPA355UA/2K5 datasheet, OPA355UA/2K5 pinout, OPA355UA/2K5 application, or OPA355UA/2K5 equivalent, key selection criteria include its 100 ns enable time, 30 ns disable time, 8.3 mA quiescent current (enabled), 3.4 µA shutdown current, and SOIC-8 package compatibility with single-supply operation from 2.5 V to 5.5 V.
Technical Context
The OPA355UA/2K5 implements a voltage-feedback CMOS architecture optimized for unity-gain stability and large-signal fidelity. Its input stage supports common-mode range extending 100 mV below ground and up to 1.5 V below V+, while the rail-to-rail output swings within 100 mV of both supply rails at 150 Ω load.
It integrates digital shutdown control with TTL-compatible enable logic referenced to V– in dual-supply mode or ground in single-supply mode, placing the output in high-impedance state during disable. Thermal shutdown activates at 160°C junction temperature and resets at 140°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 450 MHz - enables stable 1× gain configurations for video line drivers and ADC input buffers without peaking. |
| Gain-Bandwidth Product | 200 MHz - supports closed-loop gains ≥2 with usable bandwidth up to 100 MHz (G=2) or 75 MHz (0.1-dB flatness). |
| Input Voltage Noise | 5.8 nV/√Hz at 1 MHz - preserves SNR in photodiode transimpedance and ultrasound receive chains. |
| Differential Gain/Phase | 0.02% / 0.05° - meets broadcast-grade video fidelity requirements for composite NTSC signals. |
| Quiescent Current | 8.3 mA per channel (enabled), 3.4 µA (shutdown) - allows dynamic power scaling in battery-powered barcode scanners. |
| Slew Rate | 300 V/µs (positive), –360 V/µs (negative) - ensures distortion-free reproduction of fast 2-V step signals in <30 ns. |
| Supply Range | 2.5 V to 5.5 V single supply - compatible with Li-ion, USB, and industrial 3.3 V/5 V rails without level-shifting. |
Pinout & Package
OPA355UA/2K5 is packaged in an 8-pin SOIC (D package) with 4.90 mm × 3.91 mm body size, rated for –40°C to +125°C operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - rail-to-rail capable, high-impedance when ENABLE = low. |
| 2 | V– | Negative supply terminal - referenced for enable logic in split-supply configurations. |
| 3 | +IN | Noninverting input - supports input common-mode down to V– – 0.1 V. |
| 4 | –IN | Inverting input - matched to +IN for low offset and drift in precision gain stages. |
| 5 | NC | No internal connection - must remain unconnected per datasheet. |
| 6 | OUT | Not applicable - OPA355UA/2K5 is single-channel; this pin is NC in SOIC-8 variant. |
| 7 | V+ | Positive supply terminal - supplies bias for CMOS input and Class AB output stages. |
| 8 | ENABLE | Digital shutdown control - TTL-compatible; high = active, low = output high-Z and 3.4 µA IQ. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Within 100 mV of V+ and V– at 150 Ω load - maximizes dynamic range in 3.3 V systems. |
| Enable/disable timing | 100 ns enable / 30 ns disable - supports gated amplification and time-division multiplexing of analog signals. |
| Input range includes ground | Common-mode extends to V– – 0.1 V - eliminates need for level-shifting in single-supply sensor interfaces. |
| Low input bias current | 3 pA typical - minimizes voltage error in high-impedance photodiode and piezoelectric transducer circuits. |
| Thermal shutdown protection | Activates at 160°C junction, resets at 140°C - prevents permanent damage during output overload or poor PCB thermal design. |
Applications
| Video Processing | Ultrasound Imaging |
|---|---|
Use Scenario: Driving 75-Ω coaxial cables in SD/HD composite video distribution systems. IC Role / Device Role / Timing Role: Buffer amplifier with 0.02% differential gain accuracy and 75 MHz 0.1-dB flatness. Use Value: Maintains broadcast-compliant color fidelity without external passive equalization. |
Use Scenario: Low-noise amplification of weak echo signals from 5–15 MHz transducers. IC Role / Device Role / Timing Role: First-stage receiver amplifier with 5.8 nV/√Hz noise and >100 MHz small-signal bandwidth. Use Value: Preserves signal-to-noise ratio in time-gain compensation (TGC) paths before ADC sampling. |
| Photodiode Transimpedance | ADC Input Buffer |
Use Scenario: Converting nanoamp-level photocurrents in optical network monitoring modules. IC Role / Device Role / Timing Role: Transimpedance amplifier with 3 pA input bias and wide GBW for fast rise-time response. Use Value: Enables accurate low-light detection without significant DC offset error or bandwidth limitation. |
Use Scenario: Driving SAR or pipeline ADC inputs requiring fast settling and low distortion. IC Role / Device Role / Timing Role: Unity-gain stable buffer with 30 ns 0.1% settling time and –93 dBc third-harmonic distortion. Use Value: Prevents aperture uncertainty and code-dependent errors in 10+ bit data acquisition systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA356UA/2K5 | No shutdown function; higher 400-MHz GBW but no ENABLE pin; 10.5 mA IQ. | Preferred where continuous operation is required and power cycling is unnecessary. | Select OPA356UA/2K5 only if shutdown capability is not needed and higher small-signal bandwidth is critical. |
| LMH6629MA/NOPB | Higher 720-MHz GBW, 10 nV/√Hz noise, no integrated shutdown, SOIC-8 package. | Better suited for RF IF amplification above 100 MHz; less optimized for video differential gain. | Choose LMH6629MA/NOPB when >200 MHz closed-loop bandwidth is mandatory and video fidelity is secondary. |
Compared with OPA355UA/2K5, OPA356UA/2K5 trades shutdown capability for marginally higher bandwidth and slightly higher quiescent current, while LMH6629MA/NOPB offers significantly higher GBW but lacks video-optimized distortion performance and power management features.
Availability
OPA355UA/2K5 is available at Aetrix Electronics and suitable for video processing, ultrasound imaging, and photodiode transimpedance amplifier designs requiring stable component supply across automotive, industrial, and medical production programs.
Supply support for OPA355UA/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 is a global semiconductor leader specializing in analog and embedded processing technologies, with over 50 years of innovation in precision amplifiers and signal chain solutions.
The OPA355 series belongs to TI's high-speed precision op amp product line, engineered specifically for wideband video, medical imaging, and optical networking applications demanding low noise, rail-to-rail output, and integrated power management.
FAQ
What is the operating supply voltage range for the OPA355UA/2K5?
The OPA355UA/2K5 operates from 2.5 V to 5.5 V on a single supply, or ±1.25 V to ±2.75 V on dual supplies. Absolute maximum ratings limit total supply voltage to 7.5 V. The device maintains specified performance across –40°C to +125°C ambient temperature, with quiescent current increasing to 14 mA at maximum temperature.
How does the ENABLE pin function on the OPA355UA/2K5?
The ENABLE pin on the OPA355UA/2K5 controls amplifier activation: logic high (≥2 V) enables normal operation with 8.3 mA quiescent current; logic low (≤0.8 V) disables the amplifier, reducing current to 3.4 µA and placing the output in high-impedance state. Enable time is 100 ns; disable time is 30 ns. An internal 100-kΩ pullup ensures default-on behavior if left floating.
Can the OPA355UA/2K5 drive a 75-Ω video load while maintaining NTSC compliance?
Yes - the OPA355UA/2K5 delivers 0.02% differential gain and 0.05° differential phase into 150 Ω, and maintains 75 MHz 0.1-dB gain flatness. When configured as a unity-gain buffer driving 75-Ω coax, it meets NTSC broadcast specifications without external equalization, as verified in TI's SBOS195E datasheet Figure 19.
What is the maximum continuous output current rating for the OPA355UA/2K5?
The OPA355UA/2K5 supports ±60 mA continuous output current per channel. Exceeding this value is not recommended, as shown in Figures 21–23 of the datasheet. Peak output current reaches ±100 mA at 5 V supply, but thermal limits and output voltage swing degradation occur beyond ±60 mA under sustained load.
Does the OPA355UA/2K5 feature thermal shutdown protection?
Yes - the OPA355UA/2K5 includes integrated thermal shutdown that activates at 160°C junction temperature and automatically resets when junction temperature falls below 140°C. This protects against damage during output short-circuit events or inadequate PCB heat sinking, as documented in Section 7.7 and 8.3.3 of the SBOS195E datasheet.
OPA355UA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 360V/µs
- Gain Bandwidth Product:
- 200 MHz
- -3db Bandwidth:
- 450 MHz
- Current - Input Bias:
- 3 pA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 8.3mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA355UA/2K5 FAQ
1.How can I place an order for OPA355UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA355UA/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 OPA355UA/2K5 reliable?
The price and inventory of OPA355UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA355UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA355UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA355UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA355UA/2K5?
OPA355UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA355UA/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 OPA355UA/2K5?
For technical support, including OPA355UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA355UA/2K5 requirements.
6.How does Aetrix verify that OPA355UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA355UA/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 OPA355UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA355UA/2K5?
All OPA355UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA355UA/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 OPA355UA/2K5 part is unused and in its original packaging.
Return procedure for OPA355UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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