OPA345NA/3KIn StockTexas Instruments
Texas Instruments OPA345NA/3K is a single-supply rail-to-rail CMOS op-amp with 3MHz GBW, 1.8V–5.5V supply range, SOT-23-5 package. In stock from $0.873/unit (qty 6000), MOQ 115 pcs, global shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT-23-5
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- OPA345NA/3K Datasheet PDF
- Category
- operational-amplifiers
- Price
- From $0.8730(MOQ 115)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Rail-to-rail input and output for maximum dynamic range on single supply
- 3MHz gain-bandwidth product suits audio and sensor signal conditioning
- 1.8V to 5.5V single-supply operation ideal for battery-powered designs
- Low supply current (~150µA typical) for power-sensitive applications
- SOT-23-5 space-saving package, tape-and-reel 3000 pcs for SMT assembly
Applications
Widely used in portable medical devices, handheld instruments, and IoT sensor nodes where single-supply operation and rail-to-rail output swing are critical. Also suited for active filters, DAC output buffers, and low-power precision signal conditioning circuits running from Li-ion or 3.3V regulated rails.
Specifications
| Pbfree Code | Yes |
| YTEOL | 1 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | VOLTAGE-FEEDBACK |
| Average Bias Current-Max (IIB) | 0.00001 µA |
| Bias Current-Max (IIB) @25C | 0.000001 µA |
| Common-mode Reject Ratio-Min | 76dB |
| Common-mode Reject Ratio-Nom | 92dB |
| Frequency Compensation | YES (AVCL>=5) |
| Input Offset Current-Max (IIO) | 0.00001 µA |
| Input Offset Voltage-Max | 1000 µV |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e4 |
| Low-Bias | YES |
| Low-Offset | NO |
| Micropower | YES |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power | NO |
| Programmable Power | NO |
| Qualification Status | Not Qualified |
| Slew Rate-Nom | 2V/us |
| Supply Current-Max | 0.25mA |
| Supply Voltage Limit-Max | 7.5V |
| Supply Voltage-Nom (Vsup) | 5.5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Unity Gain BW-Nom | 3000 |
| Voltage Gain-Min | 31600 |
| Wideband | NO |
| Package | SOT-23-5 |
Compliance & Regulatory
| RoHS Status | Compliant |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for OPA345NA/3K:
SOT-23-5, single-supply, rail-to-rail output; lower cost alternative for non-critical general-purpose amplification
Frequently Asked Questions
What is the supply voltage range for OPA345NA/3K?
The OPA345NA/3K operates from a single supply of 1.8V to 5.5V, or dual supplies of ±0.9V to ±2.75V. This wide range makes it ideal for 3.3V and 5V digital systems as well as 1-cell or 2-cell battery-powered applications.
What package does OPA345NA/3K use, and what does the NA/3K suffix mean?
OPA345NA/3K uses the SOT-23-5 (5-pin small-outline transistor) surface-mount package. The 'NA' suffix designates the SOT-23-5 package, while '3K' indicates tape-and-reel packaging with 3000 pieces per reel — standard for SMT pick-and-place assembly.
What are typical applications for the OPA345?
The OPA345 is commonly used in portable medical instrumentation, handheld test equipment, IoT sensor front-ends, active low-pass filters, DAC output buffers, and battery-monitoring circuits. Its rail-to-rail output and low 1.8V minimum supply make it a strong choice wherever signal swing and power budget are constrained.
What is the gain-bandwidth product of the OPA345?
The OPA345 has a typical gain-bandwidth product (GBW) of 3MHz at unity gain. This suits audio-frequency signal conditioning, sensor amplification up to several hundred kHz, and general-purpose amplification tasks where bandwidth above 3MHz is not required.
Are there pin-compatible alternatives to OPA345NA/3K?
Pin-compatible alternatives in the same SOT-23-5 footprint include the OPA348 (1MHz, lower power), MCP6001 by Microchip (1MHz, 1.8V), and LMV321 by various manufacturers. For higher bandwidth with the same supply range, consider OPA365 (50MHz). Always verify supply voltage and output swing requirements against your design.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 115+ | $1.7428 | $200.42 |
| 149+ | $1.6847 | $251.02 |
| 199+ | $1.5104 | $300.57 |
| 1000+ | $0.9300 | $930.00 |
| 3000+ | $0.8910 | $2673.00 |
| 6000+ | $0.8730 | $5238.00 |
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