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Texas Instruments OPA4340UAG4
- Part No.:
- OPA4340UAG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4340UAG4.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,718
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Product details
Overview
OPA4340UAG4 from Texas Instruments is a quad rail-to-rail input/output CMOS operational amplifier optimized for single-supply, low-voltage operation (2.7 V to 5.5 V). It delivers 5.5 MHz gain-bandwidth, 6 V/µs slew rate, and output swing within 1 mV of rails under 100-kΩ load - enabling high-fidelity signal conditioning in A/D converter driver and audio front-end applications.
For engineers reviewing the OPA4340UAG4 datasheet, OPA4340UAG4 pinout, OPA4340UAG4 application, or OPA4340UAG4 equivalent, key selection criteria include rail-to-rail I/O performance at 5 V supply, low 750 µA/channel quiescent current, THD+N of 0.0007% at 1 kHz, and SOIC-14 package compatibility with space-constrained industrial and portable designs.
Technical Context
The OPA4340UAG4 employs a complementary CMOS input stage (N- and P-channel parallel pairs) enabling rail-to-rail input common-mode range extending 500 mV beyond both supply rails. Its class AB output stage supports rail-to-rail output swing with <1 mV rail proximity at light loads and maintains >106 dB open-loop gain up to 100 kΩ load.
It is unity-gain stable and specified across –40°C to +85°C, with thermal metrics including RθJA = 83.8°C/W (SOIC-14) and robust capacitive load drive up to 1000 pF in unity-gain configuration - critical for driving sampling ADC inputs like ADS7816 without external isolation resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 5.5 MHz - enables stable closed-loop gain ≥10 at 500 kHz for anti-aliasing filter interfaces. |
| Slew rate | 6 V/µs - supports full-scale 2-V step settling in ≤1 µs (0.1%), suitable for 100-kSPS+ data acquisition. |
| Input offset voltage | ±150 µV (typ) - ensures ≤0.003% gain error in precision 12-bit ADC driver circuits (e.g., ADS7816). |
| THD+N | 0.0007% at 1 kHz - preserves signal integrity in audio preamplifier and sensor signal chain stages. |
| Quiescent current | 750 µA per channel - allows four independent amplifiers in battery-powered systems with <3 mA total IQ. |
| Supply voltage range | 2.7 V to 5.5 V - operates directly from standard 3.3 V or 5 V rails without LDO regulation. |
| Output voltage swing | Within 1 mV of rails (RL ≥ 100 kΩ) - maximizes dynamic range in single-supply 0–5 V systems. |
Pinout & Package
OPA4340UAG4 is packaged in a 14-pin SOIC (body size 8.65 mm × 3.91 mm), surface-mount, RoHS-compliant package rated for –40°C to +85°C operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load or ADC input; rail-to-rail swing supports full 0–5 V signal range. |
| 2 | –IN A | Inverting input for channel A - used in inverting configurations or feedback networks with matched impedance. |
| 3 | +IN A | Noninverting input for channel A - accepts DC-coupled sensor or reference signals across full rail-to-rail common-mode range. |
| 4 | V+ | Positive power supply - connects to 2.7–5.5 V source; requires local 0.1 µF ceramic bypass capacitor. |
| 5 | +IN B | Noninverting input for channel B - electrically isolated from other channels; enables independent dual-signal processing. |
| 6 | –IN B | Inverting input for channel B - supports differential or inverting gain stages without crosstalk (typical channel separation >120 dB). |
| 7 | OUT B | Amplifier B output - identical AC/DC specs to OUT A; usable for stereo audio or dual-channel sensor buffering. |
| 8 | NC | No internal connection - must be left floating or tied to ground; not bonded internally in SOIC-14 variant. |
| 9 | NC | No internal connection - same as Pin 8; no routing or termination required on PCB. |
| 10 | +IN C | Noninverting input for channel C - extends quad functionality to multi-sensor or multi-stage active filtering. |
| 11 | V– | Negative power supply - typically ground in single-supply systems; establishes reference for rail-to-rail input stage. |
| 12 | +IN D | Noninverting input for channel D - enables fourth independent signal path; supports 4-channel data acquisition front ends. |
| 13 | –IN C | Inverting input for channel C - matches Pin 2/6/15 electrical characteristics; supports matched gain configurations. |
| 14 | OUT D | Amplifier D output - fully specified identically to OUT A/B/C; allows simultaneous 4-channel analog signal conditioning. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 500 mV beyond both supply rails - eliminates level-shifting circuitry when interfacing with 0–5 V sensors or DACs. |
| Rail-to-rail output swing | Within 1 mV of rails (100 kΩ load) - preserves >99.9% of available dynamic range in 5 V systems. |
| Low distortion | 0.0007% THD+N at 1 kHz - meets fidelity requirements for audio line drivers and precision instrumentation. |
| Low quiescent current | 750 µA per channel - enables four-channel operation at <3 mA total, ideal for portable medical or IoT edge nodes. |
| High channel isolation | ≥120 dB DC channel separation - prevents crosstalk in multi-channel data acquisition systems using shared supplies. |
Applications
| ADC Driver | Audio Preamp |
|---|---|
Use Scenario: Driving the analog input of a 12-bit sampling ADC (e.g., ADS7816) in a portable data logger with 0–5 V input range. IC Role / Device Role / Timing Role: Buffer and condition sensor signal prior to sampling; provides charge injection immunity and settles within 1 µs after multiplexer switching. Use Value: Eliminates external level-shifting components and ensures full-scale utilization of ADC's 12-bit resolution via rail-to-rail I/O. |
Use Scenario: Low-noise microphone preamplifier stage in a voice-controlled IoT device operating from a 3.3 V supply. IC Role / Device Role / Timing Role: First-stage gain block with DC-coupled input; provides 20 dB gain while preserving speech-band SNR. Use Value: 25 nV/√Hz input voltage noise and 0.0007% THD+N maintain intelligibility in far-field voice capture. |
| Process Sensor Interface | Active Filter Bank |
Use Scenario: Conditioning 4–20 mA current loop outputs from industrial pressure/temperature transmitters into 0–5 V signals. IC Role / Device Role / Timing Role: Transimpedance amplifier + level shifter; converts current to voltage while rejecting common-mode noise on long cables. Use Value: 92 dB CMRR and rail-to-rail input allow direct interface to 4–20 mA receivers without external biasing resistors. |
Use Scenario: Four-channel 2nd-order Sallen-Key low-pass filter for ECG signal conditioning in wearable health monitors. IC Role / Device Role / Timing Role: Quad op-amp implementing independent 40 Hz cutoff filters per lead; rejects 50/60 Hz interference. Use Value: Matched AC specs across all four channels ensure consistent phase response and eliminate inter-lead timing skew. |
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 (UAG4 = tube, UA = reel). | No functional difference; suitable for same PCB layout and firmware. | Select OPA4340UA for automated SMT assembly; OPA4340UAG4 preferred for prototyping or low-volume hand-soldering. |
| MCP6004-E/SL | Lower bandwidth (1 MHz), higher input offset (1.5 mV), but lower cost and wider supply range (1.8–6.0 V). | Acceptable for DC-coupled sensor buffers where speed <100 kHz and 12-bit accuracy are sufficient. | Choose MCP6004-E/SL for cost-sensitive, low-speed industrial controls; retain OPA4340UAG4 for 12-bit+ ADC drivers requiring 5.5 MHz BW. |
Compared with OPA4340UA and MCP6004-E/SL, the OPA4340UAG4 offers superior small-signal bandwidth and precision (±150 µV VOS) at the expense of higher unit cost - making it optimal for high-fidelity, medium-speed signal chains where settling time and distortion directly impact measurement validity.
Availability
OPA4340UAG4 is available at Aetrix Electronics and suitable for industrial process control, portable medical instrumentation, and audio signal conditioning requiring stable component supply and guaranteed long-term sourcing.
Supply support for OPA4340UAG4 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 converters.
The OPA340 family - including OPA4340UAG4 - was designed specifically for single-supply, rail-to-rail signal conditioning in data acquisition, audio, and sensor interface applications demanding high AC performance at low power.
FAQ
What is the maximum operating temperature range for the OPA4340UAG4?
The OPA4340UAG4 is specified over an operating free-air temperature range of –40°C to +85°C and can survive storage from –55°C to +125°C. Its SOIC-14 package exhibits RθJA = 83.8°C/W, supporting reliable operation in thermally constrained industrial enclosures when properly heatsinked or airflow-cooled.
Does the OPA4340UAG4 require external compensation for unity-gain stability?
No - the OPA4340UAG4 is internally compensated and unity-gain stable. It drives pure capacitive loads up to 1000 pF in unity-gain configuration without oscillation, as verified in TI's SBOS073C datasheet Figure 21. For loads >100 pF, adding a 10–20 Ω series resistor at the output improves phase margin without significant DC error.
Can the OPA4340UAG4 operate from a 3.3 V supply?
Yes - the OPA4340UAG4 is fully specified from 2.7 V to 5.5 V, making it compatible with standard 3.3 V logic rails. At 3.3 V, it maintains rail-to-rail input/output swing, 5.5 MHz GBW, and 750 µA/channel quiescent current, enabling direct integration into mixed-signal systems without voltage translation.
How does the rail-to-rail input stage of the OPA4340UAG4 handle signals beyond the supply rails?
The OPA4340UAG4 input stage tolerates voltages up to 0.5 V beyond V+ or V–, provided input current is limited to ≤10 mA (e.g., via series resistor). Exceeding this violates Absolute Maximum Ratings and risks latch-up or permanent damage. The complementary N/P-channel input design ensures smooth transition across the full common-mode range without dead zones.
Is the OPA4340UAG4 pin-compatible with other quad op-amps in SOIC-14 packages?
No - the OPA4340UAG4 has a unique pinout optimized for quad independence (e.g., separate +IN/–IN per channel, NC pins at 8/9). It is not pin-compatible with generic SOIC-14 quad op-amps like LM324 or TL084. Layout reuse requires verification against the official pin diagram in SBOS073C Section 5.
OPA4340UAG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
OPA4340UAG4 FAQ
1.How can I place an order for OPA4340UAG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4340UAG4 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 OPA4340UAG4 reliable?
The price and inventory of OPA4340UAG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4340UAG4 is usually 5 days.
3.What payment methods are accepted for OPA4340UAG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4340UAG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4340UAG4?
OPA4340UAG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4340UAG4 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 OPA4340UAG4?
For technical support, including OPA4340UAG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4340UAG4 requirements.
6.How does Aetrix verify that OPA4340UAG4 is sourced from the original manufacturer or authorized distributors?
All OPA4340UAG4 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 OPA4340UAG4 meets industry standards.
7.What is the process for return or replacement of OPA4340UAG4?
All OPA4340UAG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4340UAG4, 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 OPA4340UAG4 part is unused and in its original packaging.
Return procedure for OPA4340UAG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4340UAG4 Tags
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LM358DT
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LM358DR
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