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Texas Instruments OPA4350EA/2K5
- Part No.:
- OPA4350EA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
OPA4350EA/2K5.pdf
- Description:
- IC CMOS 4 CIRCUIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,140
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Product details
Overview
OPA4350EA/2K5 from Texas Instruments is a quad rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, single-supply operation. 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 OPA4350EA/2K5 datasheet, OPA4350EA/2K5 pinout, OPA4350EA/2K5 application, or OPA4350EA/2K5 equivalent, key selection considerations include its SOIC-14 package, −40°C to +85°C specified temperature range, 2.7–5.5 V supply operation, rail-to-rail swing within 10 mV of rails, and verified 600 Ω video drive capability.
Technical Context
The OPA4350EA/2K5 integrates four independent, unity-gain-stable amplifiers on a 0.6 µm CMOS process. Each channel features a complementary N/P-channel input stage enabling true rail-to-rail input (extending 100 mV beyond rails) and a Class AB output stage delivering rail-to-rail output swing - critical for maximizing dynamic range in 3.3 V and 5 V systems.
Its architecture supports stable operation with capacitive loads up to 100 pF in unity-gain configuration and maintains low distortion (−100 dBc 2nd/3rd harmonic at 100 kHz) across 1 kΩ to 600 Ω loads - making it suitable for driving sampling ADCs and 75 Ω video lines without external buffers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 38 MHz - enables stable closed-loop gain ≥10 up to ~3.8 MHz, sufficient for anti-aliasing filters and medium-speed ADC buffering. |
| Slew rate | 22 V/µs - supports clean 2.5 VPP output at 100 kHz without slewing distortion, critical for video and fast-settling data acquisition. |
| Input voltage noise density | 5 nV/√Hz at 10 kHz - ensures minimal added noise in precision sensor interfaces and low-level audio preamplification. |
| Total harmonic distortion + noise | 0.0006% at 1 kHz, RL = 600 Ω - meets broadcast-grade video (NTSC/PAL) differential gain/phase specs (0.17%/0.17°). |
| Output swing from rail | ≤10 mV at 10 kΩ load - preserves >99% of available voltage headroom in 3.3 V systems, maximizing SNR in single-supply designs. |
| Supply voltage range | 2.7 V to 5.5 V - operates from standard Li-ion (3.3 V), USB (5 V), and industrial 3.3 V/5 V rails without level-shifting. |
| Quiescent current per amplifier | 5.2 mA typical at 5 V - balances speed and power for multi-channel portable instrumentation where thermal density matters. |
Pinout & Package
OPA4350EA/2K5 is packaged in a 14-pin SOIC (SO-14) with body size 3.91 mm × 8.65 mm, optimized for automated assembly and thermal performance (RθJA = 83.8°C/W).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output - drives external load; capable of ±40 mA continuous, rail-to-rail swing with 10 mV margin at light loads. |
| 2 | −In A | Inverting input for Channel A - high-impedance (10¹³ Ω || 2.5 pF), sensitive to layout; requires matched trace lengths in differential configurations. |
| 3 | +In A | Noninverting input for Channel A - identical impedance to Pin 2; common-mode range extends 100 mV beyond V− and V+ rails. |
| 4 | V− | Negative supply terminal - connects to ground or negative rail; must be bypassed with 0.01 µF ceramic capacitor near the pin. |
| 5 | +In B | Noninverting input for Channel B - electrically isolated from other channels; enables independent biasing for multi-signal conditioning. |
| 6 | −In B | Inverting input for Channel B - shares no internal nodes with Channels A/C/D; crosstalk < −100 dB at 100 kHz. |
| 7 | Out B | Amplifier B output - fully independent; supports simultaneous high-speed operation with Channels A, C, and D without interaction. |
| 8 | Out C | Amplifier C output - pin-compatible with Out A/B/D; allows identical PCB footprint reuse across all four channels. |
| 9 | −In C | Inverting input for Channel C - laser-trimmed input offset (±150 µV typ) applies per channel, not averaged across quad. |
| 10 | +In C | Noninverting input for Channel C - supports rail-to-rail common-mode input down to −0.1 V with 2.7 V supply. |
| 11 | V+ | Positive supply terminal - accepts 2.7–5.5 V; PSRR > 74 dB ensures immunity to digital supply noise in mixed-signal boards. |
| 12 | +In D | Noninverting input for Channel D - enables four independent gain stages in one IC, reducing component count in multi-channel data loggers. |
| 13 | −In D | Inverting input for Channel D - input bias current ≤0.5 pA allows high-Z sensor interfacing (e.g., piezoelectric, pH electrodes). |
| 14 | Out D | Amplifier D output - same AC/DC specs as Out A; supports simultaneous 4-channel analog front-end without performance trade-offs. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal utilization in 3.3 V systems: input accepts −0.1 V to V+ + 0.1 V; output swings to within 10 mV of V−/V+ at 10 kΩ. |
| Low THD+N (0.0006%) | Meets broadcast video linearity requirements (NTSC/PAL) without post-compensation, eliminating need for external distortion correction. |
| 75 Ω video drive capability | Delivers 1.4 VPP into 75 Ω with <0.17% differential gain error - certified for direct connection to coaxial video outputs without series termination. |
| Quad-channel independence | Channel separation >130 dB at 100 kHz ensures no crosstalk-induced modulation in simultaneous multi-tone or multi-sensor applications. |
| Unity-gain stability | Operates unconditionally stable at G = 1 with CL ≤ 100 pF - eliminates need for external compensation in buffer and gain-of-one configurations. |
| Laser-trimmed input offset | ±150 µV typical offset (±500 µV max) reduces DC error in precision transducer signal chains without external nulling circuitry. |
Applications
| Cell Phone PA Control Loop | Driving A/D Converters |
|---|---|
Use Scenario: Closed-loop control of power amplifier output power in GSM/UMTS handsets using RSSI feedback. IC Role / Device Role / Timing Role: Error amplifier comparing detected RF envelope to reference voltage; requires fast settling (<500 ns) and low noise to suppress AM noise. Use Value: 22 V/µs slew rate and 38 MHz bandwidth enable sub-microsecond response to PA gain transients, improving EVM and spectral mask compliance. |
Use Scenario: Buffering and gain-setting stage before 12-bit, 500 kSPS sampling ADC (e.g., ADS7861) in portable data acquisition. IC Role / Device Role / Timing Role: Anti-aliasing filter driver and charge injection compensator; must settle to 0.01% in <500 ns after ADC sample command. Use Value: 0.5 µs 0.01% settling time and 600 Ω drive capability eliminate external buffer, reducing board area and power in space-constrained designs. |
| Video Processing | Audio Processing |
Use Scenario: RGB or YUV component video line driver in set-top boxes and digital signage, terminating into 75 Ω coaxial cable. IC Role / Device Role / Timing Role: DC-coupled video amplifier with gain = 2, driving 75 Ω load while maintaining NTSC/PAL timing integrity. Use Value: 0.17% differential gain and 0.17° phase error ensure color fidelity and sync pulse stability over temperature and supply variation. |
Use Scenario: Low-noise preamplifier and tone-control stage in battery-powered portable audio recorders. IC Role / Device Role / Timing Role: First-stage microphone amplifier with 40 dB gain and active bass/treble filtering; requires ultra-low self-noise. Use Value: 5 nV/√Hz input voltage noise and 0.0006% THD+N preserve dynamic range >105 dB(A), exceeding CD-quality audio specifications. |
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 |
|---|---|---|---|
| TLV2464IDR | Lower bandwidth (6.4 MHz), higher quiescent current (550 µA/ch), no 600 Ω video drive spec. | Better DC precision (offset drift 2 µV/°C) but insufficient speed for >100 kHz video or fast-settling ADC drivers. | Select when ultra-low offset drift dominates over speed/noise; avoid for video or >200 kHz signal paths. |
| AD8604ARUZ | Higher noise (12 nV/√Hz), lower slew rate (5 V/µs), same 38 MHz GBW but not characterized for 600 Ω drive. | Superior PSRR (105 dB) suits noisy digital supply environments, but THD+N (0.001%) limits video/audio fidelity. | Prefer for precision DC-coupled sensor interfaces; not recommended for broadcast video or high-SNR audio paths. |
Compared with TLV2464IDR and AD8604ARUZ, OPA4350EA/2K5 uniquely combines 38 MHz bandwidth, 22 V/µs slew rate, 5 nV/√Hz noise, and guaranteed 75 Ω video drive - making it the only quad op amp in its class qualified for simultaneous high-speed, low-distortion, and low-noise operation.
Availability
OPA4350EA/2K5 is available at Aetrix Electronics and suitable for video processing, data acquisition, and portable communications equipment requiring stable component supply and long-term production continuity.
Supply support for OPA4350EA/2K5 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 designing analog ICs, embedded processors, and system-on-chip solutions for industrial, automotive, and communications markets.
The OPAx350 series was developed specifically for low-voltage, single-supply signal conditioning - targeting A/D converter drivers, portable audio, and video line drivers where rail-to-rail swing, speed, and low noise are simultaneously required.
FAQ
What is the maximum operating temperature range for the OPA4350EA/2K5?
The OPA4350EA/2K5 is specified from −40°C to +85°C for commercial operation, with extended functionality validated from −55°C to +150°C. Its SOIC-14 package achieves RθJA = 83.8°C/W, supporting reliable operation in thermally constrained enclosures when mounted on 2-layer PCBs with standard copper pour.
Does the OPA4350EA/2K5 require external compensation for unity-gain stability?
No, the OPA4350EA/2K5 is unity-gain stable and does not require external compensation. It maintains phase margin >45° with capacitive loads up to 100 pF in G = 1 configuration, as confirmed by TI's SBOS099D datasheet Figure 21 and application note SLOA059.
Can the OPA4350EA/2K5 drive a 75 Ω video load directly?
Yes, the OPA4350EA/2K5 is explicitly characterized for 75 Ω video drive: 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 without external components.
What is the input common-mode voltage range of the OPA4350EA/2K5?
The OPA4350EA/2K5 supports rail-to-rail input: common-mode voltage ranges from −0.1 V to (V+) + 0.1 V across the full supply range (2.7 V to 5.5 V). This is enabled by its complementary N/P-channel input stage, allowing direct interface with sensors or DACs operating near supply rails.
How does the OPA4350EA/2K5 handle input signals exceeding the supply rails?
Input terminals are diode-clamped to V− and V+. Signals exceeding the rails by >0.3 V must be current-limited to ≤10 mA using series resistors - as specified in Absolute Maximum Ratings. The OPA4350EA/2K5 tolerates momentary overvoltage if this condition is met, preventing latch-up or damage.
OPA4350EA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 16-SSOP
OPA4350EA/2K5 FAQ
1.How can I place an order for OPA4350EA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4350EA/2K5 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 OPA4350EA/2K5 reliable?
The price and inventory of OPA4350EA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4350EA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA4350EA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4350EA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4350EA/2K5?
OPA4350EA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4350EA/2K5 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 OPA4350EA/2K5?
For technical support, including OPA4350EA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4350EA/2K5 requirements.
6.How does Aetrix verify that OPA4350EA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA4350EA/2K5 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 OPA4350EA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA4350EA/2K5?
All OPA4350EA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4350EA/2K5, 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 OPA4350EA/2K5 part is unused and in its original packaging.
Return procedure for OPA4350EA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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