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Texas Instruments OPA2350UA/2K5G4
- Part No.:
- OPA2350UA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2350UA/2K5G4.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,371
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Product details
Overview
OPA2350UA/2K5G4 from Texas Instruments is a dual, 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 analog front-ends-such as driving 12-bit, 500 kSPS ADCs like the ADS7861.
For engineers reviewing the OPA2350UA/2K5G4 datasheet, OPA2350UA/2K5G4 pinout, OPA2350UA/2K5G4 application, or OPA2350UA/2K5G4 equivalent, key selection criteria include its rail-to-rail swing within 10 mV of supply rails at 10 kΩ load, 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 OPA2350UA/2K5G4 implements a complementary N/P-channel input stage enabling true rail-to-rail common-mode input range (−0.1 V to V+ + 0.1 V), with laser trimming to minimize offset mismatch between input pairs. Its class AB output stage supports 600 Ω drive capability while maintaining <10 mV output swing from rails under light loads.
It features unity-gain stability, 122 dB open-loop gain (typ.), and low 0.5 µs 0.01% settling time for 2-V steps-critical for precision sampling systems. Thermal resistance is 140.1°C/W (RθJA, SOIC-8 package), and ESD ratings meet ±1000 V HBM and ±1500 V CDM standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 38 MHz - enables stable closed-loop gain ≥10 up to ~3.8 MHz, suitable for anti-aliasing filters and video gain stages. |
| Slew rate | 22 V/µs - supports full-scale 2-V step response in ≤0.1 µs without slewing distortion, critical for ADC driver fidelity. |
| Input voltage noise density | 5 nV/√Hz at 10 kHz - ensures minimal added noise in audio and sensor signal chains operating above 1 kHz. |
| THD+N | 0.0006% at 1 kHz, RL = 600 Ω, VO = 2.5 VPP - meets broadcast-grade video and high-resolution audio linearity requirements. |
| Output swing from rail | ≤10 mV at 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 - compatible with Li-ion battery (3.0–4.2 V) and standard 3.3 V/5 V logic domains without level-shifting. |
| Quiescent current per amplifier | 5.2 mA (typ.) at VS = 5 V - balances speed and power for always-on analog monitoring circuits. |
Pinout & Package
OPA2350UA/2K5G4 is housed in an 8-pin SOIC (D) package (3.91 mm × 4.90 mm), optimized for automated assembly and thermal performance (RθJA = 140.1°C/W).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output - drives external load; rail-to-rail swing supports direct interface to ADC inputs or DAC buffers. |
| 2 | −In A | Inverting input for channel A - forms feedback node in inverting configurations; high 1013 Ω || 2.5 pF impedance minimizes loading. |
| 3 | +In A | Noninverting input for channel A - accepts rail-to-rail common-mode signals (−0.1 V to V+ + 0.1 V) without clipping. |
| 4 | V− | Negative supply terminal - tied to ground in single-supply use; supports dual-supply operation down to −2.75 V. |
| 5 | +In B | Noninverting input for channel B - electrically isolated from channel A; enables independent differential sensing paths. |
| 6 | −In B | Inverting input for channel B - identical bias and noise characteristics to pin 2; crosstalk <0.15 µV/V ensures channel integrity. |
| 7 | Out B | Amplifier B output - fully independent output stage; no shared circuitry with Out A reduces inter-channel interference. |
| 8 | V+ | Positive supply terminal - bypass with 0.01 µF ceramic capacitor to suppress high-frequency supply noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Common-mode range extends 100 mV beyond both supply rails, enabling direct interfacing to sensors or DACs operating near V− or V+. |
| Rail-to-rail output | Swings to within 10 mV of V+ and V− at 10 kΩ load, preserving >99% of available voltage headroom in low-voltage systems. |
| Low THD+N | 0.0006% at 1 kHz ensures negligible harmonic contamination in audio line drivers and video reconstruction filters. |
| 75-Ω video drive | Capable of driving 75 Ω loads with <0.17% differential gain/phase error, meeting NTSC/PAL broadcast timing accuracy. |
| Unity-gain stable | No external compensation required for G = 1 configurations - simplifies design of buffer stages and active filters. |
Applications
| Cell Phone PA Control Loop | Driving A/D Converters |
|---|---|
Use Scenario: Closed-loop RF power amplifier (PA) output monitoring and correction in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Dual op-amp configured as precision current-sense amplifier (channel A) and comparator reference buffer (channel B). Use Value: Rail-to-rail input captures full PA detector voltage swing (0–3.3 V); 22 V/µs slew rate enables fast loop response to burst-mode transmission transients. |
Use Scenario: Buffering analog sensor outputs into a 12-bit, 500 kSPS SAR ADC (e.g., ADS7861) in portable data loggers. IC Role / Device Role / Timing Role: Channel A provides gain/level-shift; channel B supplies clean reference voltage to ADC REF pin. Use Value: 38 MHz bandwidth and 0.5 µs 0.01% settling ensure accurate sampling without aperture uncertainty; low 5 nV/√Hz noise preserves ENOB. |
| Video Processing | Audio Line Driver |
Use Scenario: RGB or Y/C component video signal amplification and DC restoration in HDMI source devices. IC Role / Device Role / Timing Role: Dual op-amp used as sync-tip clamp (channel A) and video gain stage (channel B) in 75 Ω terminated lines. Use Value: 0.17% differential gain/phase error and 75 Ω drive capability maintain color fidelity and timing accuracy per SMPTE 253M. |
Use Scenario: Balanced/unbalanced line driver in USB-powered audio interfaces supporting 24-bit/96 kHz playback. IC Role / Device Role / Timing Role: Channel A drives left-channel output; channel B drives right-channel output with matched gain and phase. Use Value: 0.0006% THD+N at 1 kHz and 5 nV/√Hz noise preserve dynamic range >110 dB(A); rail-to-rail output eliminates DC-blocking capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2322AIDR | Higher GBW (20 MHz vs 38 MHz), lower noise (4.5 nV/√Hz), but slower slew rate (10 V/µs) and higher quiescent current (1.6 mA per amp). | Better suited for low-power, low-frequency precision sensing; less ideal for fast-settling ADC drivers or video. | Select when ultra-low power (<2 mA) and sub-10 MHz bandwidth suffice; avoid for >200 kHz signal paths requiring fast settling. |
| MCP6V82-E/SN | Zero-drift architecture (0.01 µV/°C offset drift), lower input offset (25 µV max), but narrower GBW (10 MHz) and higher THD+N (0.0015%). | Preferred for DC-coupled sensor front-ends needing long-term offset stability; not recommended for AC-coupled video/audio. | Choose for high-precision instrumentation with static or slowly varying signals; reject for wideband AC applications demanding low distortion. |
Compared with OPA2350UA/2K5G4, OPA2322AIDR trades bandwidth and slew rate for lower power, while MCP6V82-E/SN sacrifices AC performance for superior DC precision-making OPA2350UA/2K5G4 the balanced choice for mixed-signal systems requiring speed, linearity, and rail-to-rail operation.
Availability
OPA2350UA/2K5G4 is available at Aetrix Electronics and suitable for cell phone PA control loops, A/D converter driving, video processing, and audio line driver applications requiring stable component supply and consistent parametric performance across production lots.
Supply support for OPA2350UA/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 specializing in analog and embedded processing technologies, with decades of expertise in high-performance op-amps and precision signal-chain solutions.
The OPAx350 series was designed specifically for low-voltage, single-supply systems demanding rail-to-rail I/O, high speed, and low noise-targeting portable instrumentation, communications infrastructure, and consumer video/audio equipment.
FAQ
What is the maximum operating temperature range for the OPA2350UA/2K5G4?
The OPA2350UA/2K5G4 is specified over −40°C to +85°C for reliable operation in commercial and industrial environments. It can survive storage and transient operation from −55°C to +150°C, though parametric performance is only guaranteed within the −40°C to +85°C range. This makes OPA2350UA/2K5G4 suitable for automotive cabin electronics and industrial PLC analog modules where ambient temperatures exceed 70°C.
Does the OPA2350UA/2K5G4 require external compensation for unity-gain stability?
No, the OPA2350UA/2K5G4 is internally compensated and unity-gain stable-no external capacitors or resistors are needed for G = 1 configurations. This simplifies PCB layout and reduces BOM count in buffer and follower applications. The device maintains phase margin >60° across its full operating voltage (2.7 V–5.5 V) and temperature (−40°C–85°C) ranges, as verified in the SBOS099D datasheet Figure 1.
Can the OPA2350UA/2K5G4 drive a 75-Ω video load while maintaining broadcast timing specifications?
Yes-the OPA2350UA/2K5G4 is characterized for 75-Ω video drive with 0.17% differential gain error and 0.17° differential phase error at NTSC frequencies, meeting SMPTE 253M requirements. Its 22 V/µs slew rate and 38 MHz bandwidth ensure minimal group delay across baseband video (0–5.5 MHz), and rail-to-rail output eliminates need for DC-restoration clamps in AC-coupled video paths.
What is the typical input bias current of the OPA2350UA/2K5G4, and how does it affect high-impedance sensor interfaces?
The OPA2350UA/2K5G4 exhibits a typical input bias current of ±0.5 pA at 25°C, with a maximum of ±10 pA over −40°C to +85°C. This ultra-low bias enables direct connection to high-impedance sources (e.g., piezoelectric sensors, pH electrodes, or photodiode transimpedance nodes) without significant DC error or signal attenuation. Input impedance remains >1013 Ω || 2.5 pF, minimizing loading effects on sensitive nodes.
How does the rail-to-rail input stage of the OPA2350UA/2K5G4 behave near the supply rails, and what design precautions apply?
The OPA2350UA/2K5G4 uses complementary N/P-channel input pairs, with a 400-mV transition region near (V+) − 1.8 V where both pairs conduct. Within this region, PSRR, CMRR, and THD may degrade-so critical AC signals should avoid this zone. Designers should ensure input common-mode voltage stays ≥−0.1 V and ≤V+ + 0.1 V, and limit input overvoltage to <300 mV beyond rails with ≤10 mA current limiting, as specified in the SBOS099D Absolute Maximum Ratings table.
OPA2350UA/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- 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 (x2 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:
- 8-SOIC
OPA2350UA/2K5G4 FAQ
1.How can I place an order for OPA2350UA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2350UA/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 OPA2350UA/2K5G4 reliable?
The price and inventory of OPA2350UA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2350UA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA2350UA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2350UA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2350UA/2K5G4?
OPA2350UA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2350UA/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 OPA2350UA/2K5G4?
For technical support, including OPA2350UA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2350UA/2K5G4 requirements.
6.How does Aetrix verify that OPA2350UA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA2350UA/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 OPA2350UA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA2350UA/2K5G4?
All OPA2350UA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2350UA/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 OPA2350UA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA2350UA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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