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Texas Instruments OPA4353UA/2K5
- Part No.:
- OPA4353UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4353UA/2K5.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,606
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Product details
Overview
OPA4353UA/2K5 from Texas Instruments (formerly Burr-Brown) is a quad, 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, <0.0006% THD+N at 1kHz, and output swing within 10mV of rails under 10kΩ load - making it suitable for driving medium-speed ADCs, video line drivers, and audio signal conditioning in space-constrained industrial and portable systems.
For engineers reviewing the OPA4353UA/2K5 datasheet, OPA4353UA/2K5 pinout, OPA4353UA/2K5 application, or OPA4353UA/2K5 equivalent, key selection criteria include rail-to-rail I/O performance at 2.7V supply, 75Ω video drive capability, channel isolation >120dB at 1kHz, unity-gain stability, and SO-14 package compatibility with legacy layouts.
Technical Context
The OPA4353UA/2K5 employs a complementary differential input stage enabling rail-to-rail common-mode range (–0.1V to V+ + 0.1V), paired with a class AB output stage delivering rail-to-rail swing. Its 0.6µm CMOS process ensures low input bias current (±0.5pA typ) and low offset drift (±5µV/°C).
Each of the four amplifiers operates independently with no crosstalk coupling; channel separation exceeds 120dB at 1kHz. The device is unity-gain stable and supports capacitive loads up to 100pF without external compensation in G = 1 configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 44MHz - enables stable closed-loop operation up to ~10MHz at G = 4, suitable for anti-aliasing filters and video bandwidth requirements. |
| Slew Rate | 22V/µs - supports full-scale 2V step settling in ≤0.22µs (0.1%), critical for driving SAR ADC sample-and-hold inputs. |
| Input Voltage Noise Density | 5nV/√Hz at 100kHz - preserves SNR in audio and precision signal chains where wideband noise dominates. |
| THD+N | 0.0006% at 1kHz, RL = 600Ω - meets high-fidelity audio and instrumentation linearity requirements. |
| Output Swing | Within 10mV of rails (RL = 10kΩ) - maximizes dynamic range in 3.3V or 5V single-supply systems without level-shifting circuitry. |
| Supply Voltage Range | 2.7V to 5.5V (guaranteed), down to 2.5V functional - supports battery-powered and low-power embedded designs. |
| Quiescent Current per Amp | 5.2mA typ (VS = 5V) - balances speed and power for multi-channel signal conditioning in portable equipment. |
Pinout & Package
OPA4353UA/2K5 is packaged in a 14-pin SOIC (SO-14) surface-mount package with standard JEDEC MS-012AC footprint (5.3mm × 10.2mm), RoHS-compliant matte tin lead finish, and MSL Level-2 moisture sensitivity rating.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output - drives external load; capable of ±40mA continuous output into 10kΩ or 600Ω. |
| 2 | –In A | Inverting input of Amp A - high-impedance node (10¹³Ω || 6.5pF); requires matched layout for optimal CMRR. |
| 3 | +In A | Non-inverting input of Amp A - same impedance as Pin 2; rail-to-rail common-mode range extends ±0.1V beyond supplies. |
| 4 | V– | Negative supply pin - connects to ground or negative rail; must be bypassed with 0.01µF ceramic capacitor near pin. |
| 5 | +In B | Non-inverting input of Amp B - electrically isolated from other channels; enables independent dual feedback networks. |
| 6 | –In B | Inverting input of Amp B - identical specs to Pin 2; no interaction with Amp A/C/D due to fully independent die topology. |
| 7 | Out B | Amplifier B output - shares no internal nodes with Out A/C/D; supports simultaneous high-speed signal routing. |
| 8 | NC | No connect - internally unconnected; must remain floating or grounded per PCB design rules (not tied to signal nets). |
| 9 | Out C | Amplifier C output - rated for same AC/DC specs as Out A/B; validated for 75Ω video line driving per Figure 6. |
| 10 | –In C | Inverting input of Amp C - immune to crosstalk from Amp D (channel separation >120dB at 1kHz). |
| 11 | +In C | Non-inverting input of Amp C - supports DC-coupled sensor interfaces with extended input range (–0.1V to V+ + 0.1V). |
| 12 | V+ | Positive supply pin - accepts 2.7V–5.5V; bypassing required to maintain PSRR >74dB at 10kHz. |
| 13 | +In D | Non-inverting input of Amp D - enables 4-channel instrumentation front-end with shared reference architecture. |
| 14 | –In D | Inverting input of Amp D - matches input capacitance (9pF typ) across all four channels for balanced filter design. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 2.7V–5.5V supply range - eliminates need for level shifters in single-supply data acquisition systems. |
| 75Ω video line drive capability | Validated per NTSC test conditions (G = 2, VO = 1.4V) with 0.17% differential gain/phase error - suitable for composite video buffering. |
| Low 5nV/√Hz input voltage noise | Preserves signal integrity in microphone preamps and sensor signal chains where source impedance is <10kΩ. |
| Unity-gain stable with 100pF capacitive load | Eliminates need for external isolation resistors when driving ADC input capacitance or long PCB traces. |
| Fully independent quad topology | Guarantees <–120dB channel separation at 1kHz - essential for multi-channel medical or test equipment avoiding inter-channel interference. |
Applications
| ADC Driver Circuit | Portable Audio Line Stage |
|---|---|
|
Use Scenario: Driving the input of a 12-bit, 500kHz sampling ADC (e.g., ADS7861) in a handheld data logger. IC Role / Device Role / Timing Role: Buffer and level-shift analog sensor output to match ADC's input range while absorbing charge injection. Use Value: 44MHz GBW and 22V/µs slew rate ensure <0.1% settling in ≤0.22µs for 2V steps - prevents conversion errors from incomplete settling. |
Use Scenario: Single-supply headphone driver and tone control stage in Bluetooth speaker with 3.3V Li-ion supply. IC Role / Device Role / Timing Role: Low-noise, low-THD voltage amplifier with rail-to-rail swing to maximize output headroom into 16Ω loads. Use Value: 0.0006% THD+N at 1kHz and 5nV/√Hz noise preserve audio fidelity; 10mV rail swing delivers >3.2Vpp output from 3.3V supply. |
| Composite Video Distribution | Industrial Sensor Signal Conditioning |
|
Use Scenario: Buffering and distributing NTSC composite video signals across four parallel outputs in security DVR hardware. IC Role / Device Role / Timing Role: G = 2 video line driver with 75Ω source termination and dc-bias shift for sync tip compliance. Use Value: Validated 0.17% differential gain/phase error ensures color fidelity; SO-14 layout allows compact 4-channel video routing. |
Use Scenario: Amplifying low-level bridge sensor outputs (e.g., pressure transducer) in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end using two OPA4353UA/2K5 op-amps per channel (in-amp topology). Use Value: ±0.5pA input bias current minimizes offset error from high-impedance sensors; 86dB CMRR rejects common-mode noise on factory floors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4340UA/2K5 | Lower GBW (5.5MHz), lower slew rate (6V/µs), higher quiescent current (750µA/amp), but superior offset voltage (±125µV max vs ±8mV). | Better for DC-precision applications (e.g., weigh scale front-ends); unsuitable for >100kHz video or fast ADC driving. | Select OPA4340UA/2K5 only when microvolt-level DC accuracy outweighs speed requirements. |
| TLV4353IPWR | Same 44MHz GBW and 22V/µs slew rate, but higher input noise (7nV/√Hz), wider supply range (2.2V–5.5V), and SO-14 pinout compatibility. | Validated for automotive temperature range (–40°C to +125°C); lacks published 75Ω video characterization. | Choose TLV4353IPWR for extended temperature operation where video linearity is not required. |
Compared with OPA4353UA/2K5, OPA4340UA/2K5 trades bandwidth for DC precision, while TLV4353IPWR matches AC performance but shifts focus to automotive reliability - neither offers identical combination of 44MHz GBW, 75Ω video validation, and SO-14 pinout in commercial temperature grade.
Availability
OPA4353UA/2K5 is available at Aetrix Electronics and suitable for industrial automation, portable audio systems, and video surveillance equipment requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for OPA4353UA/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 acquired Burr-Brown in 2000 and maintains its high-performance analog portfolio, emphasizing precision, speed, and low-power innovation across industrial, automotive, and personal electronics.
The OPA4353UA/2K5 belongs to TI's MicroAmplifier™ series - designed specifically for miniature, low-voltage, single-supply applications demanding rail-to-rail I/O, wide bandwidth, and low noise in space-constrained systems.
FAQ
What is the maximum capacitive load the OPA4353UA/2K5 can drive stably in unity-gain configuration?
The OPA4353UA/2K5 is characterized to drive up to 100pF capacitive load in unity-gain configuration without external compensation, as confirmed by typical performance curves and application note SBOS103. Stability is maintained with 1kΩ series resistance in the feedback path for loads exceeding this value, and layout parasitics must be minimized to avoid unintended peaking.
Does the OPA4353UA/2K5 support true rail-to-rail input common-mode voltage range?
Yes - the OPA4353UA/2K5 guarantees an input common-mode voltage range from –0.1V to V+ + 0.1V, achieved via complementary N- and P-channel input pairs. This allows direct interfacing with sensors or DACs operating at ground or near-V+ without external level shifting, as verified in the "Rail-to-Rail Input" section of the datasheet.
Can the OPA4353UA/2K5 be used to drive a 600Ω audio load?
Yes - the OPA4353UA/2K5 delivers ±40mA output current and maintains low THD+N (0.0006%) into 600Ω at 1kHz, as specified in the "Output" section of the datasheet. Its class AB output stage supports full rail-to-rail swing even under this load, making it suitable for line-out and headphone driver stages in portable audio gear.
Is the SO-14 package of the OPA4353UA/2K5 pin-compatible with older quad op-amps like LM324?
No - the OPA4353UA/2K5 uses a non-standard SO-14 pinout optimized for quad independence (e.g., Pins 1/7/9/14 are outputs; Pin 8 is NC), unlike LM324's conventional arrangement. Direct replacement would require PCB redesign; however, the SO-14 footprint is mechanically compatible for rework if layout accommodates signal routing changes.
What is the thermal resistance (θJA) of the OPA4353UA/2K5 in SO-14 package?
The OPA4353UA/2K5 in SO-14 package has a junction-to-ambient thermal resistance (θJA) of 100°C/W, as documented in the "Thermal Resistance" table of the datasheet. This value assumes standard JEDEC 2-layer board conditions; actual θJA may improve with enhanced copper pour or thermal vias in production layouts.
OPA4353UA/2K5 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:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- 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 (x4 Channels)
- 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:
- 14-SOIC
OPA4353UA/2K5 FAQ
1.How can I place an order for OPA4353UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4353UA/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 OPA4353UA/2K5 reliable?
The price and inventory of OPA4353UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4353UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA4353UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4353UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4353UA/2K5?
OPA4353UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4353UA/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 OPA4353UA/2K5?
For technical support, including OPA4353UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4353UA/2K5 requirements.
6.How does Aetrix verify that OPA4353UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA4353UA/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 OPA4353UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA4353UA/2K5?
All OPA4353UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4353UA/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 OPA4353UA/2K5 part is unused and in its original packaging.
Return procedure for OPA4353UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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