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Texas Instruments OPA2355DGSA/250G4
- Part No.:
- OPA2355DGSA/250G4
- Manufacturer:
- Texas Instruments
- Category:
- Video Amps and Modules
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2355DGSA/250G4.pdf
- Description:
- IC AMP VOLTAGE FEEDBACK 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,005
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Product details
Overview
OPA2355DGSA/250G4 from Texas Instruments is a dual-channel, high-speed CMOS operational amplifier optimized for video and wideband signal conditioning. It delivers 200-MHz gain-bandwidth product, 450-MHz unity-gain bandwidth, rail-to-rail output swing within 100 mV of rails, 5.8 nV/√Hz input voltage noise, and independent digital shutdown per channel (enable time = 100 ns, disable time = 30 ns). It operates from 2.5 V to 5.5 V single supply and drives ±60 mA continuous output current - used in high-fidelity video buffers and photodiode transimpedance stages.
For engineers reviewing the OPA2355DGSA/250G4 datasheet, OPA2355DGSA/250G4 pinout, OPA2355DGSA/250G4 application, or OPA2355DGSA/250G4 equivalent, key selection criteria include its dual-channel independence (–90 dB crosstalk at 5 MHz), differential gain/phase accuracy (0.02% / 0.05°), 0.1-dB gain flatness to 75 MHz, and thermal shutdown protection at 160°C junction temperature.
Technical Context
The OPA2355DGSA/250G4 implements a voltage-feedback CMOS architecture with fully independent channels in a 10-pin VSSOP package. Each amplifier features rail-to-rail output stage, input common-mode range extending 100 mV below ground and up to 1.5 V below V+, and CMOS input bias current ≤3 pA at 25°C.
Its shutdown function uses TTL-compatible enable inputs (EN_A on Pin 5, EN_B on Pin 6) referenced to V– in split-supply mode or ground in single-supply mode. When disabled, output enters high-impedance state and quiescent current drops to 3.4 µA per channel - enabling multiplexed output architectures and battery-sensitive designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 200 MHz - supports stable closed-loop operation up to G = 10 with predictable phase margin. |
| Unity-gain bandwidth | 450 MHz - enables high-fidelity 1× buffering of >100-MHz signals without peaking or instability. |
| Input voltage noise density | 5.8 nV/√Hz at 1 MHz - preserves SNR in low-level analog front-ends like photodiode TIA stages. |
| Differential gain/phase error | 0.02% / 0.05° - meets broadcast video fidelity requirements for NTSC composite signal amplification. |
| Output drive capability | ±60 mA continuous - sustains full rail-to-rail swing into 150 Ω loads typical of video line drivers. |
| Enable/disable timing | 100 ns enable / 30 ns disable - allows precise gating in time-multiplexed signal paths without bus contention. |
| Supply voltage range | 2.5 V to 5.5 V single supply - compatible with modern low-voltage SoC I/O domains and portable systems. |
Pinout & Package
OPA2355DGSA/250G4 is housed in a 10-pin Very Thin Shrink Small-Outline Package (VSSOP) with 0.5-mm pitch and 3.00 mm × 3.00 mm body size. Thermal resistance is RθJA = 171.1°C/W, supporting operation from –40°C to +125°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A (Pin 1) | Channel A output | High-drive rail-to-rail output node; enters high-Z when ENABLE A = LOW. |
| –IN A (Pin 2) | Channel A inverting input | Differential input terminal; supports DC-coupled feedback networks with <3 pA bias current. |
| +IN A (Pin 3) | Channel A noninverting input | DC-coupled input with common-mode range down to V– – 0.1 V - enables ground-referenced sensor interfaces. |
| V– (Pin 4) | Negative supply | Reference for enable logic and input common-mode range in split-supply configurations. |
| ENABLE A (Pin 5) | Channel A shutdown control | TTL-compatible input; internal 100-kΩ pullup to V+ ensures default ON if left floating. |
| ENABLE B (Pin 6) | Channel B shutdown control | Independent enable for second channel - enables selective power gating in multi-channel systems. |
| +IN B (Pin 7) | Channel B noninverting input | Electrically isolated from Channel A; –90 dB crosstalk at 5 MHz prevents inter-channel interference. |
| –IN B (Pin 8) | Channel B inverting input | Matched to Channel A specs; supports identical feedback topologies across both amplifiers. |
| OUT B (Pin 9) | Channel B output | Functionally identical to OUT A; supports independent loading and termination. |
| V+ (Pin 10) | Positive supply | Power rail for both channels; supplies internal bias and output stage - must be bypassed with ≥1 µF ceramic. |
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 or 5-V systems. |
| Input common-mode range | Extends 100 mV below V– and up to 1.5 V below V+ - supports direct connection to ground-referenced sources. |
| Channel isolation | –90 dB crosstalk at 5 MHz - maintains signal integrity in dual-path applications like stereo audio or differential video. |
| Thermal shutdown | Activates at 160°C junction temperature; resets at 140°C - protects against sustained overload or poor PCB thermal design. |
| Low-power shutdown | Reduces per-channel supply current from 8.3 mA to 3.4 µA - cuts total idle power by >99.9% in gated architectures. |
Applications
| Video Processing | Photodiode Transimpedance Amplifier |
|---|---|
|
Use Scenario: Amplifying composite NTSC video signals in set-top boxes and broadcast monitors. IC Role / Device Role / Timing Role: Dual-channel buffer driving 75-Ω coaxial cables with minimal gain/phase distortion. Use Value: 0.02% differential gain and 0.05° differential phase error preserve color fidelity and luma-chroma alignment. |
Use Scenario: Converting photocurrent from high-speed PIN diodes in optical receivers. IC Role / Device Role / Timing Role: Low-noise transimpedance amplifier with 5.8 nV/√Hz input noise and 200-MHz bandwidth. Use Value: Enables >100-Mbps data recovery in fiber-optic links while maintaining SNR above 60 dB. |
| Ultrasound Beamforming | ADC Input Buffer |
|
Use Scenario: Conditioning echo return signals in portable ultrasound probes with tight power budgets. IC Role / Device Role / Timing Role: Dual-channel variable-gain amplifier stage preceding 12-bit, 40-MSPS ADCs. Use Value: Independent shutdown per channel reduces system power during receive-silent intervals without sacrificing settling speed. |
Use Scenario: Driving SAR ADC inputs in industrial data acquisition modules requiring fast settling and low distortion. IC Role / Device Role / Timing Role: High-speed unity-gain buffer isolating ADC sample-and-hold from source impedance variations. Use Value: 30 ns 0.1% settling time and –93 dBc third-harmonic distortion ensure accurate digitization of 10-MHz analog inputs. |
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 |
|---|---|---|---|
| OPA2356DGSA | No shutdown function; higher 250-MHz GBW but no enable pins. | Suitable where continuous operation is required and power gating is unnecessary. | Select OPA2356DGSA only if shutdown capability is not needed and higher bandwidth is prioritized over power control. |
| LMH6629MA/NOPB | Higher 1.5-GHz GBW, 1000-V/µs slew rate, but no shutdown and higher 12.5-mA quiescent current per channel. | Better for ultra-wideband RF IF amplification; less suitable for battery-powered or thermally constrained designs. | Choose LMH6629MA/NOPB when >500-MHz small-signal bandwidth is mandatory and power efficiency is secondary. |
Compared with OPA2355DGSA/250G4, OPA2356DGSA trades shutdown control for slightly higher bandwidth and simpler enable-free operation, while LMH6629MA/NOPB offers significantly greater speed at the cost of triple the quiescent power and no power-down capability - making OPA2355DGSA/250G4 optimal for dual-channel, low-power, video-accurate signal conditioning.
Availability
OPA2355DGSA/250G4 is available at Aetrix Electronics and suitable for video processing, photodiode transimpedance amplification, and ultrasound beamforming requiring stable component supply, extended temperature support (–40°C to +125°C), and traceable sourcing.
Supply support for OPA2355DGSA/250G4 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 precision amplifiers and high-speed signal chain solutions.
The OPAx355 family was designed specifically for video and wideband analog signal conditioning - delivering broadcast-grade differential gain/phase performance, rail-to-rail output drive, and per-channel shutdown in micro-size packages for space-constrained systems.
FAQ
What is the operating supply voltage range for the OPA2355DGSA/250G4?
The OPA2355DGSA/250G4 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 supply voltage is 7.5 V (V+ to V–). Operation outside the recommended 2.7 V to 5.5 V range may degrade specifications such as offset voltage drift and CMRR, though functionality is maintained across the full 2.5–5.5 V window. The OPA2355DGSA/250G4 maintains rail-to-rail output swing and 200-MHz GBW across this entire range.
Does the OPA2355DGSA/250G4 support true rail-to-rail input?
No - the OPA2355DGSA/250G4 supports rail-to-rail *output* swing (within 100 mV of V+ and V–), but its input common-mode range extends only to V– – 0.1 V and V+ – 1.5 V. This allows ground-referenced inputs in single-supply use but does not accommodate full rail-to-rail differential input voltage. The OPA2355DGSA/250G4 input stage is CMOS-based with 3 pA typical bias current, optimized for high-impedance sources rather than input voltage extremes.
How does the shutdown feature work on the OPA2355DGSA/250G4?
The OPA2355DGSA/250G4 has two independent shutdown pins: ENABLE A (Pin 5) and ENABLE B (Pin 6). Driving either pin LOW disables its respective amplifier channel, reducing quiescent current from 8.3 mA to 3.4 µA and placing the output in high-impedance state. Enable thresholds are TTL-compatible: <0.8 V for disable, >2.0 V for enable. An internal 100-kΩ pullup to V+ ensures default ON if pins are left unconnected. The OPA2355DGSA/250G4 achieves 100 ns enable and 30 ns disable times.
What is the thermal shutdown behavior of the OPA2355DGSA/250G4?
The OPA2355DGSA/250G4 activates thermal shutdown at 160°C junction temperature, disabling both amplifier channels and forcing outputs to high-impedance state. Normal operation resumes automatically once junction temperature falls below 140°C. This protection is independent of supply voltage or enable state. The OPA2355DGSA/250G4's VSSOP package has RθJA = 171.1°C/W, so sustained >60 mA output current into low-impedance loads without adequate PCB copper pour may trigger shutdown - especially above 85°C ambient.
Can the OPA2355DGSA/250G4 drive a 75-Ω video load directly?
Yes - the OPA2355DGSA/250G4 delivers ±60 mA continuous output current and maintains 0.02% differential gain / 0.05° differential phase into 150 Ω, which covers standard 75-Ω video loads when configured as a double-terminated driver (e.g., 75 Ω series + 75 Ω shunt). Its 450-MHz unity-gain bandwidth and 75-MHz 0.1-dB gain flatness ensure minimal group delay distortion across NTSC/PAL baseband spectra. The OPA2355DGSA/250G4 is explicitly characterized for video applications in the official TI datasheet.
OPA2355DGSA/250G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Applications:
- Voltage Feedback
- Output Type:
- Rail-to-Rail
- Number of Circuits:
- 2
- -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:
- 10-VSSOP
OPA2355DGSA/250G4 FAQ
1.How can I place an order for OPA2355DGSA/250G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2355DGSA/250G4 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 OPA2355DGSA/250G4 reliable?
The price and inventory of OPA2355DGSA/250G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2355DGSA/250G4 is usually 5 days.
3.What payment methods are accepted for OPA2355DGSA/250G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2355DGSA/250G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2355DGSA/250G4?
OPA2355DGSA/250G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2355DGSA/250G4 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 OPA2355DGSA/250G4?
For technical support, including OPA2355DGSA/250G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2355DGSA/250G4 requirements.
6.How does Aetrix verify that OPA2355DGSA/250G4 is sourced from the original manufacturer or authorized distributors?
All OPA2355DGSA/250G4 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 OPA2355DGSA/250G4 meets industry standards.
7.What is the process for return or replacement of OPA2355DGSA/250G4?
All OPA2355DGSA/250G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2355DGSA/250G4, 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 OPA2355DGSA/250G4 part is unused and in its original packaging.
Return procedure for OPA2355DGSA/250G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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