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Texas Instruments OPA4340UA/2K5G4
- Part No.:
- OPA4340UA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4340UA/2K5G4.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,125
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Product details
Overview
OPA4340UA/2K5G4 from Texas Instruments is a quad rail-to-rail input/output operational amplifier optimized for single-supply, low-voltage signal conditioning in data acquisition and A/D converter driving applications. It delivers 5.5 MHz gain-bandwidth, 6 V/µs slew rate, <1 mV output swing from rails (at 100 kΩ), 750 µA per channel quiescent current, and operates from 2.7 V to 5.5 V supply.
For engineers reviewing the OPA4340UA/2K5G4 datasheet, OPA4340UA/2K5G4 pinout, OPA4340UA/2K5G4 application, or OPA4340UA/2K5G4 equivalent, key selection criteria include rail-to-rail I/O performance at 5 V, channel separation >120 dB at DC, THD+N of 0.0007% at 1 kHz, and SOIC-14 package compatibility with space-constrained analog front-ends.
Technical Context
The OPA4340UA/2K5G4 uses a complementary CMOS input stage enabling rail-to-rail input common-mode range extending 500 mV beyond both supply rails, paired with a class AB output stage delivering rail-to-rail output swing within 1 mV at light loads. Its unity-gain stable architecture supports direct connection to sampling ADCs like the ADS7816 without external compensation.
Designed for single-supply operation down to 2.7 V, it maintains specified performance across –40°C to 85°C, with input bias current ≤10 pA, open-loop gain ≥100 dB (RL = 10 kΩ), and PSRR/CMRR >80 dB over its full input voltage range - critical for precision buffer and I/V conversion roles in low-noise analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 5.5 MHz - enables stable unity-gain buffering of signals up to ~100 kHz with minimal phase lag |
| Slew rate | 6 V/µs - supports fast settling (1 µs to 0.1%) for 2-V step inputs, essential for driving sampling ADCs |
| Output swing from rail | 1 mV (RL = 100 kΩ) - maximizes dynamic range in 5-V systems by preserving >4.998 V peak-to-peak output |
| Quiescent current | 750 µA per channel - allows four-channel precision amplification with only 3 mA total supply current |
| Input offset voltage | ±150 µV (typ) - ensures <0.003% gain error in 5-V full-scale sensor interfaces |
| THD + noise | 0.0007% at 1 kHz - meets high-fidelity audio and precision measurement requirements |
| Input bias current | ±0.2 pA (typ) - minimizes voltage error across high-impedance sources (e.g., photodiode transimpedance) |
Pinout & Package
The OPA4340UA/2K5G4 is housed in a 14-pin SOIC package (8.65 mm × 3.91 mm body), surface-mount compatible, rated for –40°C to 85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load or ADC input; rail-to-rail swing enables full 0–5 V utilization |
| 2 | –IN A | Inverting input A - accepts feedback network or differential signal; part of rail-to-rail input pair |
| 3 | +IN A | Noninverting input A - connects to sensor or reference; extends 500 mV below ground and above V+ |
| 4 | V+ | Positive supply - accepts 2.7–5.5 V single supply; bypass with 0.01 µF ceramic capacitor |
| 5 | +IN B | Noninverting input B - independent channel input; identical specs to Channel A |
| 6 | –IN B | Inverting input B - supports dual-channel configuration without crosstalk (typical channel separation >120 dB) |
| 7 | OUT B | Amplifier B output - electrically isolated from Channel A; suitable for multi-sensor conditioning |
| 8 | NC | No internal connection - must be left floating or tied to ground; not bonded internally |
| 9 | –IN C | Inverting input C - third independent amplifier input; matches A/B electrical characteristics |
| 10 | +IN C | Noninverting input C - supports simultaneous 3-channel signal conditioning in compact layout |
| 11 | V– | Negative supply - typically ground in single-supply systems; provides return path for all four channels |
| 12 | +IN D | Noninverting input D - fourth channel input; enables full quad-channel analog front-end integration |
| 13 | –IN D | Inverting input D - completes quad configuration; fully independent circuitry prevents interaction |
| 14 | OUT D | Amplifier D output - delivers rail-to-rail output for fourth signal path; same AC performance as OUT A |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input range | Extends 500 mV beyond both supply rails - eliminates level-shifting circuits when interfacing 0–5 V sensors to 5-V ADCs |
| Rail-to-rail output swing | Within 1 mV of rails at 100 kΩ - preserves maximum SNR in 12-bit+ data acquisition systems |
| Low THD + noise | 0.0007% at 1 kHz - enables clean audio signal buffering and high-fidelity sensor signal conditioning |
| Ultra-low input bias current | 0.2 pA typical - avoids loading errors in high-Z pH electrodes, piezoelectric sensors, or photodiode amps |
| Quad-channel independence | No crosstalk between channels - supports simultaneous multi-channel acquisition without calibration drift |
Applications
| Driving Sampling ADCs | Audio Signal Conditioning |
|---|---|
Use Scenario: Buffering and scaling analog sensor outputs before sampling by 12-bit converters such as ADS7816 in portable data loggers. IC Role / Device Role / Timing Role: Precision voltage follower and gain stage ensuring full-rail signal delivery to ADC sample-and-hold input while absorbing charge injection. Use Value: 5.5 MHz bandwidth and 6 V/µs slew rate enable accurate capture of transient events up to 100 kHz without distortion or settling error. | Use Scenario: Low-noise preamplification and filtering of microphone or line-level audio signals in battery-powered audio recorders. IC Role / Device Role / Timing Role: Single-supply rail-to-rail op-amp providing gain, DC blocking, and anti-alias filtering in compact analog front-end. Use Value: 0.0007% THD+N and 25 nV/√Hz input voltage noise preserve signal fidelity across 20 Hz–20 kHz bandwidth. |
| Multi-Channel Sensor Interfaces | Industrial Process Monitoring |
Use Scenario: Simultaneous conditioning of four independent temperature, pressure, or current-loop sensor signals in PLC analog input modules. IC Role / Device Role / Timing Role: Quad-channel precision amplifier with matched specs per channel, eliminating inter-channel gain/offset mismatch. Use Value: Channel separation >120 dB and ±150 µV max offset ensure <0.003% cross-talk and <0.006% measurement error across all four channels. | Use Scenario: Isolating and amplifying 4–20 mA loop signals in factory-floor instrumentation with limited board space and thermal budget. IC Role / Device Role / Timing Role: Low-power, rail-to-rail I/O op-amp converting current-loop signals to precise 0–5 V levels for microcontroller ADCs. Use Value: 750 µA/channel quiescent current enables four-channel operation at <3 mA total, reducing heat and extending system uptime. |
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 | Same die, identical electrical specs; differs only in tape-and-reel packaging (no /2K5G4 suffix) and RoHS compliance status | No functional difference; suitable for same PCB layouts and operating conditions | Select OPA4340UA/2K5G4 for verified 2.5k-unit reel quantity and guaranteed green compliance per TI's latest manufacturing lot |
| MCP6004-E/SL | Lower bandwidth (1 MHz), higher input offset (1.5 mV), but lower quiescent current (1 µA/channel); SOIC-14 package | Better suited for ultra-low-power (<1 µA/channel) sensor interfaces where speed <100 kHz is acceptable | Choose MCP6004-E/SL only if power budget is tighter than 3 mA and 5.5 MHz bandwidth is unnecessary |
Compared with OPA4340UA/2K5G4, the OPA4340UA offers identical performance in different packaging, while the MCP6004-E/SL trades bandwidth and precision for ultra-low power - making the OPA4340UA/2K5G4 optimal for high-fidelity, medium-speed multi-channel signal conditioning where rail-to-rail I/O and low THD are mandatory.
Availability
OPA4340UA/2K5G4 is available at Aetrix Electronics and suitable for data acquisition systems, portable instrumentation, and industrial analog front-ends requiring stable component supply, long-term lifecycle support, and guaranteed green compliance.
Supply support for OPA4340UA/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 precision amplifiers and data converter interface solutions.
The OPA340 family-including OPA4340UA/2K5G4-is designed specifically for single-supply, rail-to-rail signal conditioning in data acquisition, sensor interfacing, and audio applications where dynamic range, low distortion, and low power are critical.
FAQ
What is the maximum supply voltage rating for the OPA4340UA/2K5G4?
The OPA4340UA/2K5G4 has an absolute maximum supply voltage of 5.5 V. It is fully specified for operation from 2.7 V to 5.5 V, with recommended continuous operation within this range. Exceeding 5.5 V may cause permanent damage, as stated in the Absolute Maximum Ratings table of the SBOS073C datasheet. The OPA4340UA/2K5G4 maintains rail-to-rail I/O functionality and specified AC performance across this entire supply range.
Does the OPA4340UA/2K5G4 support true rail-to-rail input and output simultaneously?
Yes, the OPA4340UA/2K5G4 supports true rail-to-rail input and output simultaneously. Its complementary CMOS input stage allows common-mode voltage range from –0.3 V to (V+) + 0.3 V, and its class AB output stage delivers output swing within 1 mV of both rails under light loads (100 kΩ). This capability is confirmed in Section 7.3.2 and 7.3.3 of the SBOS073C datasheet and enables full utilization of 0–5 V signal ranges in single-supply systems using the OPA4340UA/2K5G4.
What is the thermal resistance (RθJA) of the OPA4340UA/2K5G4 in its SOIC-14 package?
The junction-to-ambient thermal resistance (RθJA) for the OPA4340UA/2K5G4 in the SOIC-14 package is 83.8°C/W, as specified in Table 6.4 of the SBOS073C datasheet. This value assumes standard JEDEC 2-layer board conditions. The device also features RθJB (junction-to-board) of 59.5°C/W, indicating efficient heat transfer to the PCB - important for sustained operation in compact, thermally constrained designs using the OPA4340UA/2K5G4.
Can the OPA4340UA/2K5G4 drive capacitive loads without oscillation?
Yes, the OPA4340UA/2K5G4 can drive capacitive loads up to ~1000 pF in unity-gain configuration without instability, as documented in Section 7.3.4 and Figure 21 of the SBOS073C datasheet. For larger loads or higher gains, stability is enhanced by adding a 10–20 Ω series resistor at the output. This behavior is intrinsic to the OPA4340UA/2K5G4's internal compensation and makes it suitable for driving ADC input capacitance and long traces in real-world layouts.
Is the OPA4340UA/2K5G4 pin-compatible with other members of the OPA340 family?
No, the OPA4340UA/2K5G4 is not pin-compatible with the single (OPA340) or dual (OPA2340) variants due to differing channel count and pin assignments. However, it shares identical per-channel electrical specifications with those devices. The OPA4340UA/2K5G4 uses a dedicated 14-pin SOIC footprint with independent inputs/outputs for all four amplifiers - a layout distinct from the 8-pin SOIC used by OPA340 and OPA2340. Design reuse requires board-level adaptation when migrating to the OPA4340UA/2K5G4.
OPA4340UA/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 6V/µs
- Gain Bandwidth Product:
- 5.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 750µA (x4 Channels)
- Current - Output / Channel:
- 50 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
OPA4340UA/2K5G4 FAQ
1.How can I place an order for OPA4340UA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4340UA/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 OPA4340UA/2K5G4 reliable?
The price and inventory of OPA4340UA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4340UA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA4340UA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4340UA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4340UA/2K5G4?
OPA4340UA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4340UA/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 OPA4340UA/2K5G4?
For technical support, including OPA4340UA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4340UA/2K5G4 requirements.
6.How does Aetrix verify that OPA4340UA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA4340UA/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 OPA4340UA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA4340UA/2K5G4?
All OPA4340UA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4340UA/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 OPA4340UA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA4340UA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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