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Texas Instruments OPA3355UA/2K5
- Part No.:
- OPA3355UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Video Amps and Modules
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA3355UA/2K5.pdf
- Description:
- IC AMP VOLTAGE FEEDBACK 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,124
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Product details
Overview
OPA3355UA/2K5 from Texas Instruments is a triple-channel, high-speed, rail-to-rail output CMOS operational amplifier with digital shutdown control, designed for video signal conditioning and wideband analog processing. It delivers 200-MHz gain-bandwidth product, 450-MHz unity-gain bandwidth, 5.8 nV/√Hz input voltage noise, 0.02% differential gain, and operates from 2.5 V to 5.5 V single supply. It is used in high-fidelity video multiplexing and photodiode transimpedance stages.
For engineers reviewing the OPA3355UA/2K5 datasheet, OPA3355UA/2K5 pinout, OPA3355UA/2K5 application, or OPA3355UA/2K5 equivalent, this page provides verified electrical specifications, SOIC-14 package details, channel-independent shutdown timing (100 ns enable / 30 ns disable), thermal shutdown behavior, and validated alternatives for video, ultrasound, and optical networking designs.
Technical Context
The OPA3355UA/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 rails at 150 Ω load.
All three amplifiers operate independently with no crosstalk coupling-channel-to-channel isolation exceeds –70 dB at 5 MHz-and each features dedicated ENABLE pins (pins 1–3) that place its output in high-impedance state when disabled, enabling time-multiplexed bus architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 200 MHz - enables stable closed-loop operation up to G = 10 at 20 MHz without peaking. |
| Unity-Gain Bandwidth | 450 MHz - supports 1-V/V video follower configurations with flat response through 75 MHz (0.1-dB flatness). |
| Input Voltage Noise | 5.8 nV/√Hz at 1 MHz - preserves SNR in low-level photodiode and ADC buffer applications. |
| Differential Gain/Phase | 0.02% / 0.05° - meets broadcast-grade NTSC video linearity requirements with 150 Ω load. |
| Quiescent Current per Channel | 8.3 mA at 5 V - balances speed and power for portable or thermally constrained systems. |
| Shutdown Current per Channel | 3.4 µA - reduces total system idle power by >99% when channels are gated off. |
| Enable/Disable Time | 100 ns / 30 ns - allows sub-100-ns windowed signal acquisition and fast output bus arbitration. |
Pinout & Package
OPA3355UA/2K5 is housed in a 14-pin SOIC (D) package measuring 8.65 mm × 3.91 mm, rated for –40°C to +125°C operation. Thermal resistance θJA is 85.3°C/W, supporting moderate-power continuous use without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | ENABLE A/B/C | Dedicated TTL-compatible digital control inputs; low = high-Z output, high = active amplifier. |
| 4 | V+ | Positive supply rail connection shared across all three channels. |
| 5, 10, 12 | +IN A/B/C | Noninverting inputs for independent amplifiers A, B, C. |
| 6, 9, 13 | –IN A/B/C | Inverting inputs for independent amplifiers A, B, C. |
| 7, 8, 14 | OUT A/B/C | High-current rail-to-rail outputs capable of ±60 mA continuous drive into 150 Ω. |
| 11 | V– | Negative supply rail (ground in single-supply mode); common reference for all channels. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Within 100 mV of both rails at 150 Ω load - maximizes dynamic range in 3.3 V or 5 V systems. |
| Independent per-channel shutdown | Three separate ENABLE pins allow selective gating of individual amplifiers without affecting others - critical for multi-path video switching. |
| Low input bias current | 3 pA typical - minimizes offset drift and leakage errors in high-impedance sensor interfaces (e.g., photodiodes). |
| Thermal shutdown protection | Activates at 160°C junction temperature and resets at 140°C - prevents permanent damage during overload or poor heatsinking. |
| Video-optimized distortion performance | –81 dBc 2nd-harmonic, –93 dBc 3rd-harmonic at 1 MHz - ensures clean baseband signal integrity in composite video paths. |
Applications
| Video Processing | Ultrasound Imaging |
|---|---|
|
Use Scenario: NTSC/PAL video signal buffering and level shifting in broadcast equipment and video switchers. IC Role / Device Role / Timing Role: Triple-channel voltage follower with simultaneous enable/disable control for RGB or YUV path selection. Use Value: 0.02% differential gain and 0.05° phase error preserve color fidelity; 75 MHz 0.1-dB flatness supports full SD/HD baseband bandwidth. |
Use Scenario: Low-noise, high-bandwidth amplification of echo return signals in portable ultrasound front-ends. IC Role / Device Role / Timing Role: Triple-channel transimpedance preamplifier stage driving ADCs with synchronized channel gating. Use Value: 5.8 nV/√Hz input noise and 450 MHz unity-gain bandwidth resolve microsecond-scale echo timing with minimal jitter. |
| Optical Networking | Photodiode Transimpedance |
|
Use Scenario: Amplification and conditioning of modulated laser diode feedback signals in tunable transceivers. IC Role / Device Role / Timing Role: High-speed post-amplifier with shutdown capability for power-gated wavelength calibration cycles. Use Value: 100 ns enable time allows precise alignment with optical calibration windows; 200 MHz GBW supports 10+ Gbps signal recovery. |
Use Scenario: Converting photocurrent from PIN or APD detectors into low-impedance voltage signals in fiber-optic receivers. IC Role / Device Role / Timing Role: Low-bias-current, high-slew-rate transimpedance amplifier with rail-to-rail output for wide dynamic range. Use Value: 3 pA input bias current avoids signal loss in high-Rf configurations; 300 V/µs slew rate handles fast optical pulses without droop. |
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 |
|---|---|---|---|
| OPA355IDBVR | Single-channel, SOT-23-6, same core specs but no multi-channel integration or shared supply footprint. | Lacks triple-channel independence and compact SOIC-14 layout; requires three discrete placements for equivalent function. | Choose when board space permits discrete layout and only one channel is needed per node. |
| LMH6629MA/NOPB | Higher 1.5 GHz GBW, 10 nV/√Hz noise, no integrated shutdown; dual-channel only; requires external enable circuitry. | Better suited for RF IF amplification beyond 200 MHz; lacks video-optimized distortion specs and per-channel disable. | Prefer for >500 MHz small-signal gain stages where video linearity is not required. |
Compared with OPA3355UA/2K5, OPA355IDBVR offers identical per-channel performance in smaller form factor but sacrifices channel density and layout efficiency, while LMH6629MA/NOPB trades video-specific linearity and integrated shutdown for raw bandwidth-making OPA3355UA/2K5 optimal for space-constrained, multi-path video and optical systems requiring coordinated channel control.
Availability
OPA3355UA/2K5 is available at Aetrix Electronics and suitable for video processing, ultrasound imaging, and optical networking applications requiring stable component supply, long-term manufacturability, and guaranteed SOIC-14 packaging consistency.
Supply support for OPA3355UA/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 delivering analog and embedded processing solutions, with over 50 years of precision amplifier innovation and automotive-grade reliability validation.
The OPAx355 product line was engineered specifically for high-fidelity video signal chains and wideband analog front-ends demanding unity-gain stability, low distortion, and integrated power management-targeting broadcast, medical imaging, and optical infrastructure markets.
FAQ
What is the operating supply voltage range for the OPA3355UA/2K5?
The OPA3355UA/2K5 operates from 2.5 V to 5.5 V on single supply, or ±1.25 V to ±2.75 V on dual supply. The recommended range is 2.7 V to 5.5 V per the datasheet's electrical characteristics table. Operation outside this range may cause parametric degradation or damage, especially above the absolute maximum 7.5 V total supply rating.
Does the OPA3355UA/2K5 support rail-to-rail input?
No-the OPA3355UA/2K5 supports rail-to-rail *output* swing (within 100 mV of rails), but its input common-mode range extends only to (V–) – 0.1 V and (V+) – 1.5 V. It does *not* include the positive rail, unlike true rail-to-rail input op amps. This is confirmed in Section 7.7 of the SBOS195E datasheet under "INPUT VOLTAGE RANGE".
How does the shutdown function behave on the OPA3355UA/2K5?
Each channel of the OPA3355UA/2K5 has its own ENABLE pin (pins 1–3). Driving any ENABLE pin low disables that channel, reducing its quiescent current from 8.3 mA to 3.4 µA and placing its output in high-impedance state. Enable time is 100 ns; disable time is 30 ns. The enable input includes an internal 100-kΩ pullup to V+, so floating pins default to enabled.
What is the thermal shutdown threshold for the OPA3355UA/2K5?
The OPA3355UA/2K5 activates thermal shutdown at 160°C junction temperature and resumes normal operation once the junction cools to approximately 140°C. This hysteresis prevents oscillation near the trip point. The SOIC-14 package has θJA = 85.3°C/W, so sustained 8.3 mA per channel at 5 V (≈125 mW total dissipation) requires adequate PCB copper area to avoid triggering shutdown in still-air conditions.
Can the OPA3355UA/2K5 drive a 50 Ω load?
Yes-but with trade-offs. The OPA3355UA/2K5 delivers ±60 mA continuous output current, sufficient for 50 Ω loads up to ~3 VPP at 5 V supply. However, output voltage swing degrades: at 50 Ω, the swing is limited to ~0.3 V from each rail (per Section 7.7). For full-rail operation, use ≥150 Ω loads. Also note that small-signal bandwidth drops to 100 MHz at G = 2 into 50 Ω (vs. 200 MHz into 1 kΩ).
OPA3355UA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Voltage Feedback
- Output Type:
- Rail-to-Rail
- Number of Circuits:
- 3
- -3db Bandwidth:
- 450 MHz
- Slew Rate:
- 360V/µs
- Current - Supply:
- 8.3 mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 5.5V, ±1.25V ~ 2.75V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-SOIC
OPA3355UA/2K5 FAQ
1.How can I place an order for OPA3355UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA3355UA/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 OPA3355UA/2K5 reliable?
The price and inventory of OPA3355UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA3355UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA3355UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA3355UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA3355UA/2K5?
OPA3355UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA3355UA/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 OPA3355UA/2K5?
For technical support, including OPA3355UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA3355UA/2K5 requirements.
6.How does Aetrix verify that OPA3355UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA3355UA/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 OPA3355UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA3355UA/2K5?
All OPA3355UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA3355UA/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 OPA3355UA/2K5 part is unused and in its original packaging.
Return procedure for OPA3355UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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