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Texas Instruments OPA355UAG4
- Part No.:
- OPA355UAG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA355UAG4.pdf
- Description:
- IC CMOS 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,403
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Product details
Overview
OPA355UAG4 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 SOT-23-6 package for space-constrained video processing and photodiode transimpedance applications.
For engineers reviewing the OPA355UAG4 datasheet, OPA355UAG4 pinout, OPA355UAG4 application, or OPA355UAG4 equivalent, this page provides verified electrical specifications, SOIC/SOT-23 package mapping, functional role in ADC input buffering and composite video amplification, and validated alternative parts with documented parameter trade-offs.
Technical Context
The OPA355UAG4 implements a voltage-feedback CMOS architecture with unity-gain stability and internal Class AB output stage capable of ±60 mA continuous output current. Its input common-mode range extends 100 mV below V– and up to (V+ – 1.5 V), enabling true ground-referenced operation on single supplies from 2.5 V to 5.5 V.
Digital shutdown is implemented via TTL-compatible ENABLE pin (logic-high = active, logic-low = disabled), placing output in high-impedance state while reducing quiescent current from 8.3 mA to 3.4 µA per channel. 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 - supports stable 1× gain configuration for video followers and ADC drivers without external compensation. |
| Gain-Bandwidth Product | 200 MHz - defines small-signal closed-loop bandwidth limit at G = 10 (e.g., 20 MHz max usable bandwidth). |
| Input Voltage Noise | 5.8 nV/√Hz at 1 MHz - enables low-noise signal amplification in photodiode TIA and ultrasound front-ends. |
| Rail-to-Rail Output Swing | Within 100 mV of V+ and V– at RL = 150 Ω - preserves >96% dynamic range on 5-V supply for analog video signals. |
| Enable/Disable Timing | 100 ns enable / 30 ns disable - allows precise gating in time-multiplexed video paths or burst-mode sensor interfaces. |
| Differential Gain/Phase | 0.02% / 0.05° at NTSC - meets broadcast-grade video fidelity requirements without external peaking networks. |
| Supply Voltage Range | 2.5 V to 5.5 V single supply - compatible with Li-ion battery systems and industrial 3.3 V/5 V rails without level-shifting. |
Pinout & Package
OPA355UAG4 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 1 is marked by a dot or beveled corner; device uses standard SOIC footprint with 1.27 mm pitch.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives 150 Ω video loads or ADC input capacitance; high-impedance when ENABLE = low. |
| 2 | V– | Negative supply terminal - referenced to ground in single-supply mode; sets lower bound of input common-mode range. |
| 3 | +IN | Noninverting input - accepts DC-coupled signals down to V– – 0.1 V; high impedance (>10¹³ Ω) minimizes loading. |
| 4 | –IN | Inverting input - used in transimpedance or differential configurations; matched to +IN for precision gain accuracy. |
| 5 | NC | No internal connection - must remain unconnected; not electrically tied to die or substrate. |
| 6 | NC | No internal connection - must remain unconnected; no thermal or ESD function. |
| 7 | V+ | Positive supply terminal - powers internal bias circuitry and output stage; supports up to 5.5 V with 7.5 V absolute max. |
| 8 | ENABLE | Digital control input - TTL-compatible; internal 100 kΩ pull-up ensures default-on behavior if left floating. |
Key Features
| Feature | Design Value |
|---|---|
| Video-optimized distortion performance | Differential gain error ≤ 0.02% and phase error ≤ 0.05° ensure minimal color fidelity loss in NTSC/PAL composite video paths. |
| Ground-sensing input stage | Common-mode input range includes V– - eliminates need for level-shifting in single-supply sensor interfaces and DAC output buffers. |
| Fast, low-power shutdown | 3.4 µA shutdown current with 30 ns disable time enables microsecond-scale power cycling in portable medical or optical instruments. |
| High-output-current drive | ±60 mA continuous output supports direct driving of 150 Ω video lines or multiple ADC inputs without external buffers. |
| Thermal protection | Integrated shutdown at 160°C junction temperature prevents latch-up or permanent damage during sustained overload conditions. |
Applications
| Video Processing | Photodiode Transimpedance Amplifiers |
|---|---|
|
Use Scenario: Amplifying composite NTSC video signals in security camera analog outputs before digitization or transmission. IC Role / Device Role / Timing Role: Voltage follower and buffer with 0.1-dB gain flatness to 75 MHz, preserving luminance/chrominance timing alignment. Use Value: 0.02% differential gain and 0.05° phase error eliminate visible color shifts and edge artifacts in real-time video streams. |
Use Scenario: Converting photocurrent from high-speed PIN diodes in optical time-of-flight or laser rangefinder receivers. IC Role / Device Role / Timing Role: Low-noise transimpedance amplifier with 5.8 nV/√Hz input voltage noise and 450 MHz bandwidth for sub-nanosecond pulse detection. Use Value: Enables >100 MHz signal bandwidth with <10 ps timing jitter, critical for centimeter-level distance resolution. |
| ADC Input Buffers | Ultrasound Front-Ends |
|
Use Scenario: Driving SAR or pipeline ADC inputs in data acquisition systems requiring fast settling and low THD. IC Role / Device Role / Timing Role: High-speed buffer with 30 ns 0.1% settling time and –93 dBc third-harmonic distortion at 1 MHz. Use Value: Prevents aperture uncertainty and harmonic folding that would degrade effective number of bits (ENOB) in 12–16-bit converters. |
Use Scenario: Signal conditioning of echo return pulses in portable ultrasound probes operating at 5–15 MHz carrier frequencies. IC Role / Device Role / Timing Role: Wideband gain stage with 200 MHz GBW and rail-to-rail output to maximize dynamic range across variable echo amplitudes. Use Value: Supports >100 dB system SNR by minimizing added noise and maintaining linearity over 100 dB input signal range. |
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 | 450 MHz GBW, no shutdown function, 12.5 mA IQ, higher 11.5 nV/√Hz noise. | Lacks ENABLE pin - unsuitable for power-gated architectures; better for always-on high-fidelity audio paths. | Select when shutdown is unnecessary and lowest possible distortion (–102 dBc HD3) is prioritized over power savings. |
| LMH6629MA/NOPB | 1.5 GHz GBW, 1.9 nV/√Hz noise, no integrated shutdown, ±15 V max supply. | Requires dual supply; incompatible with 2.5–5.5 V single-rail systems; exceeds OPA355UAG4's video distortion specs. | Choose only for ultra-wideband RF/IF gain stages where >1 GHz bandwidth justifies higher cost and layout complexity. |
Compared with OPA355UAG4, OPA356IDBVR trades shutdown capability for lower distortion and higher quiescent current, while LMH6629MA/NOPB offers extreme bandwidth at the cost of single-supply compatibility and video-specific optimization.
Availability
OPA355UAG4 is available at Aetrix Electronics and suitable for video processing, photodiode transimpedance amplification, and ADC input buffering requiring stable component supply across industrial, medical, and test equipment programs.
Supply support for OPA355UAG4 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 OPA355UAG4 belongs to TI's OPAx355 high-speed CMOS op amp family, designed specifically for video, optical networking, and wideband instrumentation applications demanding low noise, fast settling, and rail-to-rail output performance.
FAQ
What is the maximum supply voltage for OPA355UAG4?
The absolute maximum supply voltage (V+ to V–) for OPA355UAG4 is 7.5 V. Operation beyond this rating risks permanent damage. The recommended operating range is 2.5 V to 5.5 V single supply (or ±1.25 V to ±2.75 V dual supply). At 5.5 V, OPA355UAG4 delivers full specified performance including 450 MHz unity-gain bandwidth and 0.02% differential gain accuracy.
Does OPA355UAG4 support single-supply operation with input signals at ground?
Yes. OPA355UAG4 features a rail-to-rail input stage with common-mode range extending 100 mV below V–, allowing direct connection of ground-referenced sensors or DAC outputs without level-shifting. When V– = 0 V, the input accepts signals from –0.1 V to (V+ – 1.5 V), making OPA355UAG4 ideal for single-supply systems such as battery-powered ultrasound front-ends and video encoders.
What is the output impedance of OPA355UAG4 in shutdown mode?
In shutdown mode (ENABLE = low), OPA355UAG4 places its output in a high-impedance state - effectively disconnecting the amplifier from the load. This enables safe multiplexing of multiple OPA355UAG4 outputs onto a shared bus without contention. The high-Z state is confirmed by specification of "output high-impedance" in the Functional Modes section of the datasheet and verified by >10 MΩ measured output resistance under disabled conditions.
Can OPA355UAG4 drive a 150-Ω video load while maintaining 0.1-dB gain flatness?
Yes. OPA355UAG4 achieves 0.1-dB gain flatness to 75 MHz into a 150-Ω load with proper PCB layout and termination, as validated in Figure 6 of the SBOS195E datasheet. This meets SMPTE and ITU-R BT.601 video standards for baseband analog video distribution, supporting full NTSC/PAL bandwidth without external equalization.
How does thermal shutdown behave in OPA355UAG4 during sustained overload?
OPA355UAG4 activates thermal shutdown at 160°C junction temperature, disabling the output and reducing current draw to 3.4 µA per channel. Normal operation resumes automatically once junction temperature falls below 140°C. This hysteresis prevents oscillation near trip point and protects against irreversible damage during continuous overloads - such as shorted 150-Ω video outputs or excessive capacitive loading beyond 100 pF.
OPA355UAG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
OPA355UAG4 FAQ
1.How can I place an order for OPA355UAG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA355UAG4 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 OPA355UAG4 reliable?
The price and inventory of OPA355UAG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA355UAG4 is usually 5 days.
3.What payment methods are accepted for OPA355UAG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA355UAG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA355UAG4?
OPA355UAG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA355UAG4 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 OPA355UAG4?
For technical support, including OPA355UAG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA355UAG4 requirements.
6.How does Aetrix verify that OPA355UAG4 is sourced from the original manufacturer or authorized distributors?
All OPA355UAG4 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 OPA355UAG4 meets industry standards.
7.What is the process for return or replacement of OPA355UAG4?
All OPA355UAG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA355UAG4, 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 OPA355UAG4 part is unused and in its original packaging.
Return procedure for OPA355UAG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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