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Texas Instruments OPA350EA/250G4
- Part No.:
- OPA350EA/250G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA350EA/250G4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,474
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Product details
Overview
OPA350EA/250G4 from Texas Instruments is a single-channel, 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, and 5 nV/√Hz input voltage noise, enabling high-fidelity signal conditioning in space-constrained A/D converter driver and video line-driver applications with 600 Ω load capability.
For engineers reviewing the OPA350EA/250G4 datasheet, OPA350EA/250G4 pinout, OPA350EA/250G4 application, or OPA350EA/250G4 equivalent, key selection criteria include rail-to-rail swing within 10 mV of rails at 10 kΩ, THD+N of 0.0006% at 1 kHz, and guaranteed operation from 2.7 V to 5.5 V across −40°C to 85°C.
Technical Context
The OPA350EA/250G4 employs a complementary N/P-channel input stage enabling true rail-to-rail input common-mode range (−0.1 V to V+ + 0.1 V), with a 400 mV transition region where both pairs conduct. Its class AB output stage achieves rail-to-rail output swing-within 10 mV of supply rails under light load-and supports stable unity-gain operation with capacitive loads up to 100 pF.
Designed on a 0.6 µm CMOS process, it features laser-trimmed offset voltage (±150 µV typ), ultra-low input bias current (±0.5 pA typ), and integrated ESD protection (±1000 V HBM). Its open-loop gain exceeds 100 dB at DC and remains ≥84 dB up to 100 kHz, supporting precision closed-loop configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 38 MHz - enables stable unity-gain operation and supports >10 MHz small-signal bandwidth in G = 2 configuration. |
| Slew rate | 22 V/µs - ensures <0.5 µs 0.01% settling for 2-V step, critical for driving medium-speed sampling ADCs. |
| Input voltage noise density | 5 nV/√Hz at 10 kHz - preserves SNR in audio and precision sensor front-ends without requiring external filtering. |
| Total harmonic distortion + noise | 0.0006% at 1 kHz, RL = 600 Ω - meets broadcast-grade video (NTSC) differential gain/phase specs (0.17%/0.17°). |
| Supply voltage range | 2.7 V to 5.5 V - operates from single Li-ion cell (3.0–4.2 V) or regulated 3.3 V/5 V rails without level-shifting. |
| Output swing from rail | 10 mV at 10 kΩ load - maximizes dynamic range in 3.3 V systems, delivering >3.2 VPP output with 3.3 V supply. |
| Input common-mode range | −0.1 V to V+ + 0.1 V - accepts ground-referenced signals and allows direct interfacing with SAR ADC reference buffers. |
Pinout & Package
OPA350EA/250G4 is packaged in an 8-pin MSOP (DGK) with body size 3.00 mm × 3.00 mm, optimized for high-density PCB layouts and thermal performance (RθJA = 169.2°C/W).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No connect (NC) | Internally unconnected; must be left floating or tied to ground per layout best practice. |
| 2 | Inverting input (−In) | Differential input node; high-impedance (1013 Ω || 2.5 pF) with ±0.5 pA bias current. |
| 3 | Noninverting input (+In) | Differential input node; identical impedance and bias characteristics as Pin 2. |
| 4 | Negative supply (V−) | Ground reference for single-supply operation; supports input down to −0.1 V relative to this pin. |
| 5 | No connect (NC) | Internally unconnected; no electrical function; avoid routing signals nearby. |
| 6 | Output (Out) | Class AB rail-to-rail output capable of ±40 mA drive into resistive loads and stable with 100 pF capacitive loads. |
| 7 | Positive supply (V+) | Single-supply input (2.7–5.5 V); requires 0.01 µF ceramic bypass capacitor placed adjacent to this pin. |
| 8 | No connect (NC) | Internally unconnected; electrically isolated; tie to ground only if required for mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Complementary N/P-channel pair extends common-mode range to −0.1 V and V+ + 0.1 V, eliminating level-shifting in 3.3 V systems. |
| Rail-to-rail output stage | Class AB topology delivers 10 mV rail clearance at 10 kΩ, enabling full-scale signal utilization in low-voltage data acquisition. |
| Low-noise, high-speed architecture | 5 nV/√Hz noise + 38 MHz GBW + 22 V/µs slew rate supports 12-bit ADC driving with <0.5 µs 0.01% settling. |
| Laser-trimmed input offset | ±150 µV typical offset (±500 µV max) and ±4 µV/°C drift ensure dc accuracy in precision transducer amplifiers. |
| Unity-gain stability | Stable with CL ≤ 100 pF in G = 1 configuration-no external compensation required for most buffer applications. |
Applications
| Cell Phone PA Control Loop | Driving A/D Converters |
|---|---|
Use Scenario: Closed-loop control of power amplifier output power in GSM/UMTS handset RF front-ends. IC Role / Device Role / Timing Role: Precision current-sense amplifier and error integrator in feedback path, operating from 3.3 V supply. Use Value: Rail-to-rail input accepts 0–3.3 V DAC output; low THD+N prevents spectral regrowth; 22 V/µs slew rate enables fast loop response. |
Use Scenario: Buffering analog input to medium-speed SAR or sigma-delta ADCs (e.g., ADS7861, 500 kSPS). IC Role / Device Role / Timing Role: Charge injection compensator and gain stage preceding sampling capacitor network. Use Value: 38 MHz GBW and 0.5 µs 0.01% settling minimize aperture uncertainty; 600 Ω drive capability matches ADC input impedance. |
| Video Processing (75 Ω) | Audio Line Driver |
Use Scenario: Driving composite NTSC video signals over 75 Ω coaxial cable in portable media players. IC Role / Device Role / Timing Role: DC-coupled line driver with gain = 2, maintaining sync tip and luminance integrity. Use Value: 0.17% differential gain and 0.17° phase error meet SMPTE/EBU broadcast specs; rail-to-rail output delivers full 1.4 VPP signal. |
Use Scenario: Low-noise headphone/line-level output stage in portable audio codecs and DACs. IC Role / Device Role / Timing Role: Output buffer with G = 2, driving 32 Ω headphones or 10 kΩ line inputs. Use Value: 5 nV/√Hz noise preserves 110 dB SNR; 0.0006% THD+N eliminates audible distortion; 40 mA output supports 32 Ω loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA350UA/2K5 | Same silicon, SOIC-8 package (3.91 mm × 4.90 mm); higher RθJA (140.1°C/W) vs MSOP's 169.2°C/W. | Better thermal margin in high-power-density designs; less suitable for ultra-compact layouts. | Select OPA350UA/2K5 when board space permits larger footprint and thermal dissipation is prioritized over miniaturization. |
| OPA365AIDBVR | Higher GBW (50 MHz), lower noise (4.5 nV/√Hz), but narrower input common-mode range (to V+ − 1.5 V). | Superior for >20 MHz signal chains; unsuitable for ground-swinging inputs in single-supply sensor interfaces. | Choose OPA365AIDBVR only when bandwidth and noise dominate, and input signals remain ≥1.5 V below V+. |
Compared with OPA350UA/2K5, the OPA350EA/250G4 offers superior board-area efficiency and higher thermal resistance for compact battery-powered devices; versus OPA365AIDBVR, it trades 12 MHz bandwidth for guaranteed rail-to-rail input operation essential in low-voltage sensor buffering.
Availability
OPA350EA/250G4 is available at Aetrix Electronics and suitable for cell phone PA control loops, A/D converter driving, video processing, audio line driving, and active filter design requiring stable component supply and long-term industrial availability.
Supply support for OPA350EA/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 op amp innovation and broad manufacturing scale.
The OPA350 series belongs to TI's MicroAmplifier™ portfolio, engineered specifically for low-voltage, rail-to-rail signal conditioning in portable, battery-powered, and space-constrained systems-from handheld medical devices to consumer audio and communications infrastructure.
FAQ
What is the minimum supply voltage for reliable operation of the OPA350EA/250G4?
The OPA350EA/250G4 is fully specified from 2.7 V to 5.5 V and operates down to 2.5 V. At 2.5 V, key parameters including gain-bandwidth (38 MHz), slew rate (22 V/µs), and rail-to-rail input/output swing remain functional, though quiescent current drops to ~5.2 mA per amplifier. For guaranteed performance across temperature, use ≥2.7 V.
Does the OPA350EA/250G4 require external compensation for unity-gain stability?
No, the OPA350EA/250G4 is unity-gain stable and does not require external compensation. It maintains phase margin >60° with capacitive loads up to 100 pF in G = 1 configuration. Layout best practices-such as placing a 0.01 µF ceramic bypass capacitor directly at Pin 7 (V+)-are sufficient for stable operation.
Can the OPA350EA/250G4 drive a 600 Ω load while maintaining rail-to-rail output swing?
Yes-the OPA350EA/250G4 delivers rail-to-rail output swing even into 600 Ω loads: output voltage swings to within 25 mV of each rail at ±2.5 mA output current (per Figure 17). At 2.5 VPP into 600 Ω, THD+N remains 0.0006%, confirming suitability for 75 Ω video line driving per NTSC specifications.
What is the significance of the "transition region" in the OPA350EA/250G4 input stage?
The OPA350EA/250G4's complementary input stage has a 400 mV transition region near V+ − 1.8 V where both N- and P-channel pairs conduct. Within this region, PSRR, CMRR, and THD may degrade slightly. Designers should avoid sustained operation here-e.g., by biasing input signals ≥200 mV below V+-to maintain datasheet-grade performance.
How does the OPA350EA/250G4 compare to the OPA2350 dual version in terms of thermal performance?
The OPA350EA/250G4 (MSOP-8) has RθJA = 169.2°C/W, while the OPA2350 in the same DGK package shares identical thermal metrics. Both exceed the SOIC-8 versions (RθJA = 140.1°C/W for OPA350UA, 140.1°C/W for OPA2350UA). The MSOP's higher thermal resistance is offset by smaller footprint-critical in thermally isolated PCB zones.
OPA350EA/250G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 38 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 150 µV
- 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-VSSOP
OPA350EA/250G4 FAQ
1.How can I place an order for OPA350EA/250G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA350EA/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 OPA350EA/250G4 reliable?
The price and inventory of OPA350EA/250G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA350EA/250G4 is usually 5 days.
3.What payment methods are accepted for OPA350EA/250G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA350EA/250G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA350EA/250G4?
OPA350EA/250G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA350EA/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 OPA350EA/250G4?
For technical support, including OPA350EA/250G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA350EA/250G4 requirements.
6.How does Aetrix verify that OPA350EA/250G4 is sourced from the original manufacturer or authorized distributors?
All OPA350EA/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 OPA350EA/250G4 meets industry standards.
7.What is the process for return or replacement of OPA350EA/250G4?
All OPA350EA/250G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA350EA/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 OPA350EA/250G4 part is unused and in its original packaging.
Return procedure for OPA350EA/250G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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