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Texas Instruments OPA353UAG4
- Part No.:
- OPA353UAG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA353UAG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,098
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Product details
Overview
OPA353UAG4 from Texas Instruments (formerly Burr-Brown) is a single, rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, single-supply operation (2.7V–5.5V). It delivers 44MHz gain-bandwidth, 22V/µs slew rate, 5nV/√Hz input voltage noise, <10mV output swing from rails (RL = 10kΩ), and 0.0006% THD+N at 1kHz - making it ideal for driving medium-speed SAR ADCs and video line drivers in space-constrained portable systems.
For engineers reviewing the OPA353UAG4 datasheet, OPA353UAG4 pinout, OPA353UAG4 application, or OPA353UAG4 equivalent, this page provides verified technical context, SO-8 package mapping, real-world application cards for A/D converter buffering and composite video drive, and two validated alternative op-amps with documented functional trade-offs.
Technical Context
The OPA353UAG4 employs a complementary differential input stage enabling rail-to-rail common-mode input range (–0.1V to V+ + 0.1V), with a 400mV transition region where both N- and P-channel pairs conduct. Its class AB common-source output stage achieves 10mV rail-to-rail swing under light load while maintaining >100dB open-loop gain.
It is unity-gain stable and features low input bias current (±0.5pA typ), high PSRR/CMRR (>76dB), and robust capacitive load drive capability - validated up to 100pF in unity-gain configuration without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 44MHz - supports stable closed-loop gain ≥10 up to ~4MHz; sufficient for 500kHz sampling ADC driver with margin. |
| Slew Rate | 22V/µs - enables full-scale 2V step settling in ≤0.22µs (0.1%), critical for fast-settling buffer stages before ADC inputs. |
| Input Voltage Noise | 5nV/√Hz at 100kHz - preserves SNR in audio and precision signal conditioning paths without added noise floor degradation. |
| Output Swing (10kΩ) | Within 10mV of V+ and V– rails - maximizes dynamic range in 3.3V or 5V single-supply systems, e.g., battery-powered data loggers. |
| THD+N | 0.0006% at 1kHz, RL = 600Ω - meets high-fidelity audio and communications line driver requirements without post-filtering. |
| Supply Voltage Range | 2.7V to 5.5V (guaranteed), down to 2.5V operational - compatible with Li-ion, USB, and industrial 3.3V rails without level-shifting. |
| Quiescent Current | 5.2mA typ per amplifier - balances speed and power for always-on sensor interfaces and portable instrumentation. |
Pinout & Package
OPA353UAG4 is housed in an 8-pin SOIC (SO-8) surface-mount package (Package Drawing D), with thermal resistance θJA = 150°C/W. Pin numbering follows standard SOIC top-view convention.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +In | Non-inverting input terminal; accepts rail-to-rail common-mode signals from –0.1V to V+ + 0.1V. |
| 2 | –In | Inverting input terminal; matched to +In for precision closed-loop gain accuracy. |
| 3 | Out | Amplified output node; drives 10kΩ loads to within 10mV of supply rails; capable of ±40mA output current. |
| 4 | V– | Negative supply pin; connects to ground or negative rail; input protection diodes clamp to this pin. |
| 5 | NC | No-connect pin; electrically isolated; must remain unconnected per datasheet. |
| 6 | NC | No-connect pin; electrically isolated; must remain unconnected per datasheet. |
| 7 | V+ | Positive supply pin; operates from 2.7V to 5.5V; requires 0.01µF ceramic bypass capacitor to V–. |
| 8 | NC | No-connect pin; electrically isolated; must remain unconnected per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Common-mode range extends 100mV beyond both supply rails - eliminates need for level-shifting in single-supply sensor front-ends. |
| Rail-to-rail output | Swings to within 10mV of V+ and V– with 10kΩ load - preserves >99% of available voltage headroom for maximum ADC utilization. |
| 75Ω video drive | Stable into 75Ω loads with <0.2% differential gain/phase error - certified for composite video line driving without external buffers. |
| Low THD+N | 0.0006% at 1kHz enables clean audio signal paths and high-SNR communication channel conditioning. |
| Unity-gain stability | No external compensation required in G = 1 configurations - simplifies PCB layout and reduces BOM count for basic buffer applications. |
Applications
| ADC Driver | Composite Video Line Driver |
|---|---|
Use Scenario: Buffering analog sensor outputs before sampling by a 12-bit, 500kHz SAR ADC (e.g., ADS7861) in a portable data acquisition system. IC Role / Device Role / Timing Role: High-speed, low-noise voltage follower that absorbs ADC input capacitance and charge kickback, ensuring monotonic sampling. Use Value: 0.22µs 0.1% settling time and 5nV/√Hz noise prevent aperture uncertainty and SNR degradation in medium-speed digitization. |
Use Scenario: Driving 75Ω coaxial cable in single-supply composite video equipment (e.g., security camera output stage). IC Role / Device Role / Timing Role: G = 2 non-inverting amplifier with AC-coupled input and DC bias network, delivering synchronized NTSC-compatible output. Use Value: 0.17% differential gain and 0.17° phase error preserve color fidelity; rail-to-rail output handles sync tip to peak-white swing without clipping. |
| Cell Phone PA Control Loop | Audio Signal Conditioning |
Use Scenario: Closed-loop feedback amplifier controlling RF power amplifier bias in GSM/EDGE handset transceivers. IC Role / Device Role / Timing Role: Fast-settling error amplifier comparing detected PA output to reference, correcting gain drift in real time. Use Value: 44MHz GBW and 22V/µs slew rate enable sub-microsecond response to PA envelope variations, improving EVM and spectral mask compliance. |
Use Scenario: Low-distortion preamplifier and active filter stage in battery-powered headphone amplifiers or voice recorders. IC Role / Device Role / Timing Role: Unity-gain buffer and 10kHz low-pass filter (Figure 9) shaping audio band while rejecting RF interference. Use Value: 0.0006% THD+N and 5nV/√Hz noise ensure transparent audio reproduction; rail-to-rail I/O maximizes dynamic range on 3.3V supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA365AIDBVR | Higher GBW (50MHz), lower noise (4.5nV/√Hz), but higher IQ (8.5mA); same SO-8 package. | Better suited for >1MHz signal chains; less optimal for ultra-low-power battery apps due to 60% higher quiescent current. | Select when bandwidth/noise margin is critical and supply current budget allows ≥8mA per channel. |
| MCP6001T-E/OT | Lower speed (1MHz GBW), higher noise (17nV/√Hz), but ultra-low IQ (100µA); SOT-23-5 only. | Targeted at cost-sensitive, low-frequency sensor interfaces - not viable for ADC driving or video. | Choose only for sub-100kHz DC-coupled applications where power is paramount and performance margins are relaxed. |
Compared with OPA353UAG4, OPA365AIDBVR offers measurable bandwidth and noise improvements at the cost of higher supply current, while MCP6001T-E/OT trades all high-speed capability for extreme power efficiency - making OPA353UAG4 the balanced choice for 100kHz–500kHz mixed-signal interface tasks.
Availability
OPA353UAG4 is available at Aetrix Electronics and suitable for data acquisition, video processing, and portable instrumentation requiring stable component supply, RoHS-compliant packaging, and guaranteed -40°C to +85°C operation.
Supply support for OPA353UAG4 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 acquired Burr-Brown in 2000 and maintains its precision analog portfolio, emphasizing high-performance, low-power, and application-optimized signal chain solutions.
The OPA353UAG4 belongs to TI's MicroAmplifier™ series - designed specifically for miniature, single-supply systems demanding rail-to-rail operation, high speed, and low noise in portable and space-constrained electronics.
FAQ
What is the maximum operating supply voltage for OPA353UAG4?
The OPA353UAG4 is fully specified from 2.7V to 5.5V, with absolute maximum rating of 5.5V. It can operate down to 2.5V, though some parameters like output swing and bandwidth may degrade slightly below 2.7V. Always use 0.01µF ceramic bypass capacitors from V+ to V– for stable operation across the full OPA353UAG4 supply range.
Does OPA353UAG4 support rail-to-rail input and output simultaneously?
Yes - the OPA353UAG4 supports rail-to-rail input common-mode range (–0.1V to V+ + 0.1V) and rail-to-rail output swing (within 10mV of V+ and V– with 10kΩ load). This simultaneous capability enables full utilization of supply voltage in single-supply designs, such as 3.3V data acquisition front-ends where OPA353UAG4 drives ADC inputs without level-shifting circuitry.
Can OPA353UAG4 drive a 75Ω video load directly?
Yes - the OPA353UAG4 is characterized for 75Ω video line driving with 0.17% differential gain error and 0.17° differential phase error using NTSC test signals. Its class AB output stage delivers sufficient current (±40mA) and maintains stability without external buffers, making OPA353UAG4 suitable for composite video output stages in security cameras and portable monitors.
Is OPA353UAG4 unity-gain stable?
Yes - the OPA353UAG4 is explicitly unity-gain stable and requires no external compensation in G = 1 configurations. Its internal compensation ensures ≥45° phase margin with 100pF capacitive loads in unity-gain, as confirmed in the "Small-Signal Overshoot vs Load Capacitance" typical curve. This simplifies design of high-fidelity buffers where OPA353UAG4 is used to isolate sensitive nodes.
What is the input bias current specification for OPA353UAG4?
The OPA353UAG4 has a typical input bias current of ±0.5pA at +25°C, with a maximum of ±10pA over –40°C to +85°C. This ultra-low value minimizes voltage errors in high-impedance sensor interfaces (e.g., photodiode transimpedance amps), and remains stable across temperature - critical for precision OPA353UAG4 applications like medical instrumentation and analytical equipment.
OPA353UAG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 22V/µs
- Gain Bandwidth Product:
- 44 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 5.2mA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA353UAG4 FAQ
1.How can I place an order for OPA353UAG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA353UAG4 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 OPA353UAG4 reliable?
The price and inventory of OPA353UAG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA353UAG4 is usually 5 days.
3.What payment methods are accepted for OPA353UAG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA353UAG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA353UAG4?
OPA353UAG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA353UAG4 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 OPA353UAG4?
For technical support, including OPA353UAG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA353UAG4 requirements.
6.How does Aetrix verify that OPA353UAG4 is sourced from the original manufacturer or authorized distributors?
All OPA353UAG4 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 OPA353UAG4 meets industry standards.
7.What is the process for return or replacement of OPA353UAG4?
All OPA353UAG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA353UAG4, 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 OPA353UAG4 part is unused and in its original packaging.
Return procedure for OPA353UAG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA353UAG4 Tags
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LM358DT
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LM358DR
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