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Texas Instruments OPA355UA/2K5G4
- Part No.:
- OPA355UA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA355UA/2K5G4.pdf
- Description:
- IC CMOS 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,542
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Product details
Overview
OPA355UA/2K5G4 from Texas Instruments is a single-channel, high-speed CMOS operational amplifier optimized for video and wideband signal conditioning. It delivers 450 MHz unity-gain bandwidth, 200 MHz gain-bandwidth product, rail-to-rail output swing within 100 mV of rails, 5.8 nV/√Hz input voltage noise, and digital shutdown with 100 ns enable / 30 ns disable timing - deployed in applications such as HD video buffers and photodiode transimpedance stages.
For engineers reviewing the OPA355UA/2K5G4 datasheet, OPA355UA/2K5G4 pinout, OPA355UA/2K5G4 application, or OPA355UA/2K5G4 equivalent, key selection criteria include its 2.5 V to 5.5 V single-supply operation, ±60 mA continuous output drive, –40°C to +125°C temperature range, and SOIC-8 package compatibility with video routing, ADC input buffering, and optical networking front-ends.
Technical Context
The OPA355UA/2K5G4 implements a voltage-feedback CMOS architecture with unity-gain stability and integrated digital enable control. Its input stage supports common-mode voltage down to 100 mV below ground and up to 1.5 V below V+, enabling true single-supply operation without level-shifting circuitry.
It features thermal shutdown activation at 160°C and recovery at 140°C, rail-to-rail output capable of driving 150 Ω loads with <0.02% differential gain error and <0.05° differential phase error (NTSC), and low 3 pA input bias current enabling high-impedance sensor interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 450 MHz - enables stable 1× gain configurations for video followers and ADC drivers without external compensation. |
| Gain-Bandwidth Product | 200 MHz - supports G = 2 amplification up to 100 MHz or G = 10 up to 20 MHz with predictable closed-loop response. |
| Input Voltage Noise | 5.8 nV/√Hz at 1 MHz - preserves SNR in low-level analog signal chains like photodiode TIA or ultrasound receive paths. |
| Rail-to-Rail Output Swing | Within 100 mV of rails at 150 Ω load - maximizes dynamic range in 3.3 V or 5 V systems without negative supply. |
| Shutdown Current | 3.4 µA per amplifier - reduces system standby power in battery-powered barcode scanners or portable medical devices. |
| Differential Gain/Phase | 0.02% / 0.05° (NTSC, RL = 150 Ω) - meets broadcast-grade video fidelity requirements for SD/HD composite video processing. |
| Enable/Disable Time | 100 ns / 30 ns - supports high-speed multiplexing and gated sampling in time-division systems. |
Pinout & Package
OPA355UA/2K5G4 is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, rated for –40°C to +125°C operation, with exposed pad not present and moisture sensitivity level (MSL) 1 per JEDEC J-STD-020.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output terminal; high-current capable (±60 mA continuous), high-impedance when disabled. |
| 2 | V– | Negative supply pin; referenced to system ground in single-supply mode; supports dual-supply operation down to ±1.25 V. |
| 3 | +IN | Noninverting input; CMOS input with 3 pA bias current and common-mode range extending 100 mV below ground. |
| 4 | –IN | Inverting input; matched to +IN for precision differential operation; supports active filter and transimpedance configurations. |
| 5 | NC | No internal connection; must remain unconnected per datasheet; not used for thermal or electrical functions. |
| 6 | OUT (redundant) | Not applicable - OPA355UA/2K5G4 is single-channel; this pin is NC per SOIC-8 pinout (see D package diagram). |
| 7 | V+ | Positive supply pin; operates from 2.5 V to 5.5 V; supplies 8.3 mA quiescent current per amplifier when enabled. |
| 8 | ENABLE | Digital shutdown control; TTL-compatible (VIH ≥ 2 V, VIL ≤ 0.8 V); places output in high-Z state when low. |
Key Features
| Feature | Design Value |
|---|---|
| Video-optimized distortion performance | 0.02% differential gain / 0.05° differential phase error ensures minimal color fidelity loss in NTSC/PAL video signal paths. |
| Single-supply rail-to-rail I/O | Input common-mode extends to V– – 0.1 V and output swings to within 100 mV of both rails - eliminates need for dual supplies in portable imaging systems. |
| Fast enable/disable switching | 100 ns turn-on and 30 ns turn-off times allow use as a synchronous gate in time-division multiplexed data acquisition. |
| Low-input-bias-current CMOS input | 3 pA typical input bias current enables direct interface with high-impedance sources such as photodiodes and piezoelectric sensors. |
| Integrated thermal protection | Shuts down at 160°C junction temperature and recovers at 140°C - prevents permanent damage during sustained overload or poor PCB thermal design. |
Applications
| Video Processing | Photodiode Transimpedance Amplifiers |
|---|---|
|
Use Scenario: Driving 75 Ω coaxial video lines in HD surveillance camera modules with composite or component analog outputs. IC Role / Device Role / Timing Role: Buffer and level-shift video signal while preserving amplitude and phase integrity across DC–75 MHz bandwidth. Use Value: Achieves 0.02% differential gain and 0.05° differential phase error at NTSC frequencies, meeting broadcast compliance without external calibration. |
Use Scenario: Converting weak photocurrents from low-light biomedical sensors into robust voltage signals for ADC digitization. IC Role / Device Role / Timing Role: High-gain, low-noise transimpedance amplifier with 5.8 nV/√Hz input noise and 3 pA input bias current. Use Value: Enables sub-picoampere current detection with minimal Johnson-Nyquist noise contribution, critical for fluorescence lifetime measurement systems. |
| ADC Input Buffers | Optical Networking Front-Ends |
|
Use Scenario: Driving SAR and pipeline ADC inputs in high-speed data acquisition systems requiring fast settling and low distortion. IC Role / Device Role / Timing Role: Unity-gain stable buffer with 30 ns 0.1% settling time and 300 V/µs slew rate to prevent aperture uncertainty. Use Value: Ensures full-scale step accuracy and <–81 dBc harmonic distortion at 1 MHz, supporting 14-bit+ effective resolution. |
Use Scenario: Amplifying modulated RF signals from tunable laser diodes and PIN photodetectors in 10G/25G optical transceivers. IC Role / Device Role / Timing Role: Wideband post-amplifier with 200 MHz GBW and 450 MHz unity-gain bandwidth for baseband signal conditioning. Use Value: Supports >100 Mbps small-signal response with flat gain to 75 MHz (0.1-dB), enabling precise eye-diagram opening in PAM4 receivers. |
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 |
|---|---|---|---|
| OPA356IDBVR | Higher 450 MHz GBW but no shutdown function; 100 mA output drive; same SOIC-8 footprint. | Lacks enable/disable control - unsuitable for power-gated systems; better for always-on high-fidelity video paths. | Select OPA356IDBVR only when shutdown is unnecessary and maximum bandwidth at G ≥ 2 is required. |
| LMH6629MA/NOPB | Lower 200 MHz GBW, higher 1.9 nV/√Hz noise, no shutdown, ±15 V operation support. | Designed for dual-supply lab instrumentation; incompatible with 2.5–5.5 V single-supply constraints of portable designs. | Choose LMH6629MA/NOPB for precision dual-supply test equipment where ultra-low noise dominates over power management. |
Compared with OPA355UA/2K5G4, OPA356IDBVR trades shutdown capability for marginally improved small-signal bandwidth at higher gains, while LMH6629MA/NOPB offers lower noise but requires dual supplies and lacks enable logic - making OPA355UA/2K5G4 uniquely suited for battery-powered, video-critical, and thermally constrained embedded systems.
Availability
OPA355UA/2K5G4 is available at Aetrix Electronics and suitable for video processing, photodiode signal conditioning, and high-speed ADC buffering requiring stable component supply across industrial, medical, and communications end markets.
Supply support for OPA355UA/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 specializing in analog and embedded processing technologies, with decades of expertise in high-performance op amps and precision signal chain solutions.
The OPA355 series belongs to TI's high-speed voltage-feedback op amp product line, engineered specifically for video fidelity, wideband sensor interfaces, and low-power portable instrumentation demanding GHz-class transient response and sub-degree phase accuracy.
FAQ
What is the operating supply voltage range for OPA355UA/2K5G4?
The OPA355UA/2K5G4 operates from 2.5 V to 5.5 V on a single supply, or ±1.25 V to ±2.75 V on dual supplies. The recommended range is 2.7 V to 5.5 V per datasheet Section 7.3. Operation outside this range may cause parametric degradation or permanent damage, especially above the absolute maximum 7.5 V total supply rating.
Does OPA355UA/2K5G4 support rail-to-rail input and output?
The OPA355UA/2K5G4 supports rail-to-rail output swing (within 100 mV of V+ and V–) but only rail-to-rail *input common-mode* - its input range extends 100 mV below V– and up to 1.5 V below V+, not full rail-to-rail. This allows ground-referenced inputs in single-supply systems but does not support V+–referenced signals at the input pins.
What is the thermal shutdown behavior of OPA355UA/2K5G4?
The OPA355UA/2K5G4 activates thermal shutdown at 160°C junction temperature and resumes normal operation once the junction cools to 140°C. This protection is internal and automatic; no external circuitry is needed. The SOIC-8 package has θJA = 125°C/W, so proper PCB copper area and airflow are essential to avoid repeated cycling under sustained load.
Can OPA355UA/2K5G4 drive a 75 Ω video load directly?
Yes - the OPA355UA/2K5G4 is characterized for 150 Ω loads with 0.02% differential gain error and can drive 75 Ω with appropriate gain-setting resistors and layout attention. TI's typical application circuits (Section 9.3) confirm stable 75 Ω video line driving at 1× gain, though output current must stay within ±60 mA continuous limits to avoid thermal stress.
Is the ENABLE pin of OPA355UA/2K5G4 internally pulled up?
Yes - the ENABLE pin includes an internal 100 kΩ pullup resistor to V+, so the amplifier powers on if the pin is left floating. However, for deterministic operation in noisy environments, TI recommends actively driving the pin to >2 V (enable) or <0.8 V (disable) rather than relying on the pullup, especially in systems with variable supply ramp rates or shared enable buses.
OPA355UA/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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/2K5G4 FAQ
1.How can I place an order for OPA355UA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA355UA/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 OPA355UA/2K5G4 reliable?
The price and inventory of OPA355UA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA355UA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA355UA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA355UA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA355UA/2K5G4?
OPA355UA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA355UA/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 OPA355UA/2K5G4?
For technical support, including OPA355UA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA355UA/2K5G4 requirements.
6.How does Aetrix verify that OPA355UA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA355UA/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 OPA355UA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA355UA/2K5G4?
All OPA355UA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA355UA/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 OPA355UA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA355UA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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