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Texas Instruments OPA4350UA/2K5G4
- Part No.:
- OPA4350UA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4350UA/2K5G4.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,856
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Product details
Overview
OPA4350UA/2K5G4 from Texas Instruments is a quad rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, single-supply operation (2.7 V to 5.5 V). It delivers 38 MHz gain-bandwidth, 22 V/µs slew rate, 5 nV/√Hz input voltage noise, and 0.0006% THD+N at 1 kHz - enabling high-fidelity signal conditioning in A/D converter driver, video, and audio applications.
For engineers reviewing the OPA4350UA/2K5G4 datasheet, OPA4350UA/2K5G4 pinout, OPA4350UA/2K5G4 application, or OPA4350UA/2K5G4 equivalent, key selection criteria include rail-to-rail swing within 10 mV of rails, 600 Ω video drive capability, unity-gain stability, and SOIC-14 package compatibility with space-constrained industrial and communications designs.
Technical Context
The OPA4350UA/2K5G4 integrates four independent, laser-trimmed CMOS op-amps on a 0.6 µm process, featuring complementary N/P-channel input stages for true rail-to-rail input (extending 100 mV beyond rails) and a Class AB output stage for rail-to-rail output swing. Each amplifier maintains identical AC/DC specifications across temperature (–40°C to 85°C) and supply (2.7 V to 5.5 V).
Its architecture supports stable unity-gain operation while driving capacitive loads up to 100 pF, with channel separation >120 dB at 100 kHz and open-loop gain ≥122 dB. Input bias current is ultra-low (±0.5 pA typ), and PSRR/CMRR exceed 74 dB over full common-mode range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 38 MHz - enables stable closed-loop gain ≥10 at 3.8 MHz, suitable for anti-aliasing filters and medium-speed ADC buffering. |
| Slew rate | 22 V/µs - supports clean 2.5 VPP output at 1 MHz without slewing distortion in video and data acquisition paths. |
| Input voltage noise density | 5 nV/√Hz at 10 kHz - ensures <1 µVrms integrated noise in 20 kHz audio bandwidth, critical for low-level sensor amplification. |
| THD+N | 0.0006% at 1 kHz, RL = 600 Ω - meets broadcast-grade video (NTSC/PAL) differential gain/phase specs (0.17%/0.17°). |
| Output swing | Within 10 mV of rails (RL = 10 kΩ) - maximizes dynamic range in 3.3 V or 5 V single-supply systems, e.g., portable instrumentation. |
| Supply voltage range | 2.7 V to 5.5 V - operates from Li-ion battery (3.0–4.2 V) or regulated 3.3 V/5 V rails without level-shifting circuitry. |
| Quiescent current per amp | 5.2 mA max - allows four-channel operation at <21 mA total, compatible with power-sensitive embedded controllers. |
Pinout & Package
OPA4350UA/2K5G4 is packaged in a 14-pin SOIC (SO-14) with body size 3.91 mm × 8.65 mm, rated for –40°C to 85°C operation and qualified for industrial applications.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output - drives external load; capable of ±40 mA continuous, 600 Ω video termination. |
| 2 | –In A | Inverting input for Channel A - high-impedance node (10¹³ Ω || 2.5 pF); requires matched trace routing for precision DC gain. |
| 3 | +In A | Noninverting input for Channel A - same impedance as –In A; rail-to-rail common-mode range (–0.1 V to V+ + 0.1 V). |
| 4 | V– | Negative supply pin - connects to ground or negative rail; must be bypassed with 0.01 µF ceramic capacitor near pin. |
| 5 | +In B | Noninverting input for Channel B - electrically isolated from other channels; enables independent signal paths in multi-channel systems. |
| 6 | –In B | Inverting input for Channel B - no crosstalk coupling to Channels A/C/D (channel separation >120 dB at 100 kHz). |
| 7 | Out B | Amplifier B output - identical performance to Out A; supports simultaneous dual-signal processing (e.g., stereo audio, differential ADC inputs). |
| 8 | Out C | Amplifier C output - shares same die but fully independent circuitry; usable for reference buffering or active filtering without interaction. |
| 9 | –In C | Inverting input for Channel C - supports high-precision summing or transimpedance configurations with sub-pA bias current. |
| 10 | +In C | Noninverting input for Channel C - compatible with single-supply sensor interfaces requiring ground-referenced inputs. |
| 11 | V+ | Positive supply pin - accepts 2.7–5.5 V; supplies all four amplifiers; requires local 0.01 µF ceramic decoupling. |
| 12 | +In D | Noninverting input for Channel D - enables fourth independent analog path, e.g., system monitor, calibration reference, or auxiliary signal chain. |
| 13 | –In D | Inverting input for Channel D - maintains same offset voltage drift (±4 µV/°C) and CMRR (74 dB min) as other channels. |
| 14 | Out D | Amplifier D output - completes quad functionality; output swing remains within 25 mV of rails even at 25 mA load (TA = 85°C). |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Input common-mode extends –0.1 V to V+ + 0.1 V; output swings to within 10 mV of V+ and V– under light load - preserves full signal headroom in 3.3 V systems. |
| Low THD+N (0.0006%) | Enables broadcast-compliant video signal amplification (75 Ω drive) without post-filtering, meeting NTSC PAL differential gain/phase requirements. |
| Ultra-low input bias current (±0.5 pA) | Minimizes voltage error in high-impedance sensor interfaces (e.g., pH electrodes, photodiode TIA), eliminating need for guard traces or bias compensation. |
| Unity-gain stable | Operates reliably at G = 1 without external compensation - simplifies design of voltage followers, active filters, and ADC input buffers. |
| Quad-channel isolation | Channel separation >120 dB at 100 kHz ensures no measurable crosstalk between simultaneous analog paths - critical for multi-channel data acquisition. |
| Single-supply operation (2.7 V) | Eliminates dual-rail power supplies in portable and battery-powered equipment, reducing bill-of-materials and PCB area. |
Applications
| Video Signal Amplification | Multi-Channel Data Acquisition |
|---|---|
|
Use Scenario: Amplifying composite NTSC/PAL video signals in set-top boxes and surveillance DVRs with 75 Ω source/load impedance. IC Role / Device Role / Timing Role: OPA4350UA/2K5G4 serves as a unity-gain buffer and line driver, preserving signal integrity across four independent video channels. Use Value: Achieves 0.17% differential gain and 0.17° differential phase error - meets broadcast video fidelity standards without external passive components. |
Use Scenario: Conditioning analog outputs from four-channel sensors (e.g., temperature, pressure, humidity) before multiplexed ADC sampling. IC Role / Device Role / Timing Role: OPA4350UA/2K5G4 provides simultaneous rail-to-rail buffering and anti-aliasing filtering for each sensor channel. Use Value: Delivers <1 µVrms integrated noise and ±150 µV max input offset - ensures 12-bit ADC accuracy without calibration overhead. |
| Cell Phone PA Control Loops | Audio Line-Level Processing |
|
Use Scenario: Monitoring and regulating RF power amplifier output in GSM/UMTS handsets using directional coupler feedback. IC Role / Device Role / Timing Role: OPA4350UA/2K5G4 conditions fast-settling DC envelope signals (0.1% settling in 0.22 µs) for closed-loop PA control. Use Value: 22 V/µs slew rate and 38 MHz bandwidth enable accurate real-time power tracking across 800–2100 MHz bands. |
Use Scenario: Driving stereo line outputs (RCA/jack) and headphone amplifiers in portable media players and smart speakers. IC Role / Device Role / Timing Role: OPA4350UA/2K5G4 acts as output buffer and level shifter in single-supply 3.3 V audio subsystems. Use Value: 5 nV/√Hz noise density and 0.0006% THD+N deliver >105 dB SNR - exceeds CD-quality audio performance benchmarks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4340UA | Lower bandwidth (5.5 MHz), lower slew rate (6 V/µs), higher input offset (250 µV max), same SO-14 package. | Better suited for low-frequency precision instrumentation (e.g., medical sensors), not video or fast ADC drivers. | Select OPA4340UA only when bandwidth <6 MHz suffices and ultra-low offset drift (0.15 µV/°C) is prioritized over speed. |
| TLV2474CDR | Wider supply range (2.7–6 V), higher quiescent current (650 µA/amp), lower GBW (2.8 MHz), no specified 75 Ω drive capability. | Targeted at general-purpose industrial I/O modules where cost is critical and video/audio performance is not required. | Choose TLV2474CDR for cost-sensitive, non-critical signal conditioning where THD+N >0.01% and slew rate <1 V/µs are acceptable. |
Compared with OPA4350UA/2K5G4, OPA4340UA trades bandwidth and slew rate for lower drift and offset, while TLV2474CDR offers lower unit cost at the expense of AC performance and video compliance - making OPA4350UA/2K5G4 the optimal choice for high-fidelity, multi-channel, single-supply signal chains.
Availability
OPA4350UA/2K5G4 is available at Aetrix Electronics and suitable for video signal processing, multi-channel data acquisition, and portable audio systems requiring stable component supply, long-term industrial lifecycle support, and guaranteed SOIC-14 packaging consistency.
Supply support for OPA4350UA/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 delivering analog and embedded processing solutions, with over 50 years of innovation in precision amplifiers and signal chain ICs.
The OPAx350 series was designed specifically for single-supply, rail-to-rail signal conditioning in space-constrained, low-voltage applications - including portable instrumentation, communications infrastructure, and consumer video/audio equipment.
FAQ
What is the maximum operating temperature range for the OPA4350UA/2K5G4?
The OPA4350UA/2K5G4 is specified for operation from –40°C to +85°C and can function continuously from –55°C to +150°C. Its thermal resistance (RθJA) is 83.8°C/W in the SOIC-14 package, enabling reliable performance in industrial enclosures without forced airflow when power dissipation remains below 150 mW per amplifier.
Does the OPA4350UA/2K5G4 support true rail-to-rail input with signals extending beyond the supply rails?
Yes - the OPA4350UA/2K5G4 features complementary N/P-channel input stages that allow the input common-mode voltage to extend 100 mV beyond both V+ and V– rails. However, operation within the 400-mV transition region (typically V+ – 2.0 V to V+ – 1.6 V) may degrade PSRR, CMRR, and THD; TI recommends avoiding sustained input signals in this zone for precision applications.
Can the OPA4350UA/2K5G4 drive a 75 Ω video load directly?
Yes - the OPA4350UA/2K5G4 is explicitly characterized for 75 Ω video drive capability. At G = 2 and VO = 1.4 VPP, it achieves 0.17% differential gain error and 0.17° differential phase error, meeting NTSC/PAL broadcast standards. Output current capability of ±40 mA ensures stable 2.5 VPP drive into 600 Ω, and thus robust 1 VPP into 75 Ω with appropriate gain setting.
Is the OPA4350UA/2K5G4 unity-gain stable, and what compensation is required?
Yes - the OPA4350UA/2K5G4 is internally compensated for unity-gain stability and requires no external components for G ≥ 1 operation. Its phase margin exceeds 60° at unity gain with 100 pF capacitive load, and Figure 21 in the datasheet confirms stable step response with ≤10% overshoot under these conditions.
How does channel separation perform in the OPA4350UA/2K5G4 at high frequencies?
Channel separation in the OPA4350UA/2K5G4 exceeds 120 dB at 100 kHz and remains >80 dB up to 1 MHz, due to fully independent internal circuitry and optimized SOIC-14 layout. This ensures negligible crosstalk between simultaneous analog paths - critical for multi-channel data acquisition and stereo audio where inter-channel isolation directly impacts measurement accuracy and stereo imaging.
OPA4350UA/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 22V/µs
- Gain Bandwidth Product:
- 38 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 5.2mA (x4 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
OPA4350UA/2K5G4 FAQ
1.How can I place an order for OPA4350UA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4350UA/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 OPA4350UA/2K5G4 reliable?
The price and inventory of OPA4350UA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4350UA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA4350UA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4350UA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4350UA/2K5G4?
OPA4350UA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4350UA/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 OPA4350UA/2K5G4?
For technical support, including OPA4350UA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4350UA/2K5G4 requirements.
6.How does Aetrix verify that OPA4350UA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA4350UA/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 OPA4350UA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA4350UA/2K5G4?
All OPA4350UA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4350UA/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 OPA4350UA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA4350UA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4350UA/2K5G4 Tags
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