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Texas Instruments OPA340NA/250G4
- Part No.:
- OPA340NA/250G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA340NA/250G4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:131
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Product details
Overview
OPA340NA/250G4 from Texas Instruments is a single-supply, rail-to-rail input/output CMOS operational amplifier optimized for driving sampling analog-to-digital converters (ADCs) such as the ADS7816. It delivers 5.5 MHz gain-bandwidth, 6 V/µs slew rate, and output swing within 1 mV of rails under 100-kΩ load at 5 V supply - enabling high-fidelity signal conditioning in low-voltage data acquisition systems.
For engineers reviewing the OPA340NA/250G4 datasheet, OPA340NA/250G4 pinout, OPA340NA/250G4 application, or OPA340NA/250G4 equivalent, key selection criteria include rail-to-rail input range extending 500 mV beyond supply rails, THD+N of 0.0007% at 1 kHz, and micro-power operation at 750 µA per channel - critical for battery-powered sensor front-ends and PCMCIA interfaces.
Technical Context
The OPA340NA/250G4 uses a complementary N-channel/P-channel input stage to achieve rail-to-rail common-mode input range (–0.3 V to +5.3 V at 5 V supply), with laser trimming minimizing offset mismatch between input pairs. Its class AB output stage drives resistive loads down to 2 kΩ while maintaining open-loop gain ≥94 dB and settling to 0.01% in 1.6 µs for 2-V steps.
Designed for unity-gain stability, it supports capacitive loads up to 1000 pF without external compensation and operates across 2.5 V to 5.5 V supply range - with full specifications guaranteed from –40°C to +85°C and extended operation from –55°C to +125°C.
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 buffering |
| Slew rate | 6 V/µs - supports distortion-free 100-kHz full-scale sine wave output with ≤0.0007% THD+N |
| Input offset voltage | ±150 µV (typ) - ensures ≤0.3 LSB error when driving 12-bit ADCs like ADS7816 with 5-V reference |
| Quiescent current | 750 µA per channel - allows continuous operation in micro-power systems with <1 mA total supply budget |
| Output voltage swing | Within 1 mV of rails (100-kΩ load) - maximizes dynamic range in single-supply 0–5 V data acquisition |
| Input voltage range | –0.3 V to (V+) + 0.3 V - accepts bipolar signals or overvoltage transients without clamping diode conduction |
| THD + noise | 0.0007% at 1 kHz - meets audio-grade signal integrity requirements for communications and active filtering |
Pinout & Package
The OPA340NA/250G4 is packaged in a 5-pin SOT-23 (DBV) surface-mount package with 3.00 mm × 3.00 mm body size, optimized for space-constrained PCB layouts in portable instrumentation and embedded sensors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Amplifier output | Delivers rail-to-rail voltage swing; requires 0.01-µF ceramic bypass capacitor near V+ and GND pins |
| 2 - V− | Negative supply | Connected to ground in single-supply operation; supports input common-mode down to –0.3 V |
| 3 - +IN | Noninverting input | High-impedance node (10¹³ Ω || 3 pF); used for unity-gain buffer or noninverting gain configurations |
| 4 - −IN | Inverting input | High-impedance node; forms feedback network with resistor divider or ADC input capacitance |
| 5 - V+ | Positive supply | Accepts 2.5–5.5 V; must be decoupled locally to suppress supply-induced noise coupling into analog signal path |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Common-mode range extends 500 mV beyond both supply rails - eliminates level-shifting circuitry for 0–5 V sensor outputs |
| Rail-to-rail output | Swings within 1 mV of V+ and V− with 100-kΩ load - preserves >99.9% of available ADC input range |
| Low THD + noise | 0.0007% at 1 kHz - maintains SNR >100 dB for 12-bit precision in audio and measurement applications |
| Micro-size packaging | 5-pin SOT-23 footprint (3.0 × 3.0 mm) - enables integration into ultra-compact modules like PCMCIA cards and IoT edge nodes |
| Wide supply range | Operates from 2.5 V to 5.5 V with full specs guaranteed at 2.7–5 V - supports Li-ion, USB, and dual-cell alkaline power sources |
Applications
| ADC Driver Interface | Audio Signal Conditioning |
|---|---|
|
Use Scenario: Buffering and gain-setting for 12-bit sampling ADCs like ADS7816 in portable data loggers. IC Role / Device Role / Timing Role: Acts as unity-gain buffer to isolate ADC input capacitance and absorb charge injection during sample-and-hold switching. Use Value: Enables accurate 0–5 V full-scale conversion without missing codes, leveraging ±150 µV offset and rail-to-rail swing. |
Use Scenario: Low-noise preamplification and filtering in battery-powered voice recorders and headset amplifiers. IC Role / Device Role / Timing Role: Provides high-fidelity signal amplification with 25 nV/√Hz input voltage noise and 0.0007% THD+N at 1 kHz. Use Value: Preserves speech intelligibility and harmonic content across 20 Hz–20 kHz bandwidth with minimal power consumption. |
| Process Sensor Front-End | PCMCIA Card Analog I/O |
|
Use Scenario: Amplifying millivolt-level outputs from thermocouples and RTDs in industrial control modules. IC Role / Device Role / Timing Role: Serves as precision instrumentation amplifier stage with rail-to-rail input accepting negative common-mode voltages. Use Value: Supports direct connection to grounded-sensor configurations without external biasing, reducing BOM count and layout area. |
Use Scenario: Signal conditioning for analog I/O functions on credit-card-sized PCMCIA peripherals. IC Role / Device Role / Timing Role: Functions as compact, low-quiescent-current buffer for DAC outputs and sensor inputs in space-limited add-in cards. Use Value: Delivers 5.5 MHz bandwidth and 6 V/µs slew rate in 3.0 × 3.0 mm SOT-23 package - meeting PCMCIA mechanical and thermal constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | Zero-drift architecture; 0.1 µV/°C offset drift vs. OPA340NA/250G4's ±2.5 µV/°C; 350 kHz GBW vs. 5.5 MHz | Better DC precision for low-frequency sensor amplification; lower bandwidth limits use with >100 kHz ADCs | Select OPA333AIDBVR when sub-µV offset stability dominates over speed; avoid for ADS7816 interface where 5.5 MHz GBW ensures clean settling |
| MCP6001T-E/OT | Lower quiescent current (100 µA) but reduced performance: 1 MHz GBW, 0.6 V/µs slew rate, 4.5 mV max offset | Suitable for cost-sensitive, low-speed monitoring; insufficient slew rate for 12-bit ADC driving at full throughput | Choose MCP6001T-E/OT only for static or slow-varying signals; OPA340NA/250G4 remains preferred for time-critical sampling applications |
Compared with OPA333AIDBVR and MCP6001T-E/OT, the OPA340NA/250G4 uniquely balances high-speed precision (5.5 MHz, 6 V/µs) with rail-to-rail operation and micro-power consumption - making it the optimal choice for 12-bit ADC driver and audio signal chain roles where both bandwidth and dynamic range are essential.
Availability
OPA340NA/250G4 is available at Aetrix Electronics and suitable for data acquisition, portable instrumentation, and audio signal conditioning requiring stable component supply and long-term production continuity.
Supply support for OPA340NA/250G4 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 innovation in precision amplifiers and data converter interfaces.
The OPA340 series belongs to TI's MicroAmplifier™ line, designed specifically for single-supply, rail-to-rail signal conditioning in space- and power-constrained systems - including ADC drivers, portable audio, and industrial sensor front-ends.
FAQ
What is the operating supply voltage range for the OPA340NA/250G4?
The OPA340NA/250G4 operates from 2.5 V to 5.5 V, with full electrical specifications guaranteed over 2.7 V to 5 V. This wide range supports direct integration with Li-ion batteries, USB-powered systems, and dual-cell alkaline supplies - all while maintaining rail-to-rail input/output performance and 750 µA quiescent current.
Does the OPA340NA/250G4 require external compensation for unity-gain stability?
No, the OPA340NA/250G4 is internally compensated for unity-gain stability and drives capacitive loads up to 1000 pF without oscillation. When driving >100 pF, adding a 10–20 Ω series resistor at the output improves phase margin and reduces ringing - a technique validated in TI's SBOS073C datasheet Figure 25.
How does the rail-to-rail input stage of the OPA340NA/250G4 handle signals beyond the supply rails?
The OPA340NA/250G4 input stage includes parallel N-channel and P-channel differential pairs, allowing common-mode input from –0.3 V to (V+) + 0.3 V. Inputs exceeding rails by >500 mV must be current-limited to ≤10 mA using series resistors - a requirement documented in Section 7.3.2 of the SBOS073C datasheet.
Can the OPA340NA/250G4 drive the ADS7816 12-bit ADC directly?
Yes - the OPA340NA/250G4 is explicitly characterized for ADS7816 interface in noninverting and inverting configurations (Figures 26 and 27, SBOS073C). Its 6 V/µs slew rate, 1.6 µs 0.01% settling time, and rail-to-rail output ensure accurate sampling without missing codes, even at full 100-kSPS throughput.
What package type is used for the OPA340NA/250G4, and what are its thermal characteristics?
The OPA340NA/250G4 uses the 5-pin SOT-23 (DBV) package with 3.00 mm × 3.00 mm body size. Its junction-to-ambient thermal resistance (RθJA) is 207.9 °C/W, and junction-to-board (RθJB) is 36.0 °C/W - enabling reliable operation in compact layouts with moderate airflow or standard PCB copper pour.
OPA340NA/250G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- 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
- 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:
- SOT-23-5
OPA340NA/250G4 FAQ
1.How can I place an order for OPA340NA/250G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA340NA/250G4 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 OPA340NA/250G4 reliable?
The price and inventory of OPA340NA/250G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA340NA/250G4 is usually 5 days.
3.What payment methods are accepted for OPA340NA/250G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA340NA/250G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA340NA/250G4?
OPA340NA/250G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA340NA/250G4 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 OPA340NA/250G4?
For technical support, including OPA340NA/250G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA340NA/250G4 requirements.
6.How does Aetrix verify that OPA340NA/250G4 is sourced from the original manufacturer or authorized distributors?
All OPA340NA/250G4 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 OPA340NA/250G4 meets industry standards.
7.What is the process for return or replacement of OPA340NA/250G4?
All OPA340NA/250G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA340NA/250G4, 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 OPA340NA/250G4 part is unused and in its original packaging.
Return procedure for OPA340NA/250G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA340NA/250G4 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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