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Texas Instruments OPA2341DGSA/2K5
- Part No.:
- OPA2341DGSA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2341DGSA/2K5.pdf
- Description:
- IC CMOS 2 CIRCUIT 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
OPA2341DGSA/2K5 from Texas Instruments is a dual, rail-to-rail input/output CMOS operational amplifier with shutdown control, designed for low-voltage single-supply operation (2.5V to 5.5V), delivering 5.5MHz gain-bandwidth, 6V/µs slew rate, and 750µA per channel quiescent current - ideal for precision signal conditioning in portable data acquisition systems.
For engineers reviewing the OPA2341DGSA/2K5 datasheet, OPA2341DGSA/2K5 pinout, OPA2341DGSA/2K5 application, or OPA2341DGSA/2K5 equivalent, key selection considerations include its MSOP-10 package, independent dual-channel architecture with <5µV/V channel separation, shutdown current of 10nA, and guaranteed operation from –55°C to +125°C for industrial sensor interfaces.
Technical Context
The OPA2341DGSA/2K5 implements a complementary CMOS input stage enabling rail-to-rail input common-mode range extending 300mV beyond supply rails, paired with a class AB output stage achieving 1mV rail-to-rail swing into 100kΩ. Its unity-gain stable architecture supports driving sampling ADCs with 1µs 0.1% settling time and low THD+N (0.0007% at 1kHz).
Shutdown functionality is controlled via CMOS-compatible enable pins (SD A/SD B) with 1µs turn-off and 3µs turn-on delay; each amplifier operates independently, ensuring minimal crosstalk (<0.2µV/V dc channel separation) and no interaction between channels under dynamic load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V - enables direct interface with 3.3V and 5V microcontrollers without level-shifting. |
| Gain-Bandwidth Product | 5.5MHz - supports stable closed-loop gain ≥10 up to ~500kHz for anti-aliasing filter design. |
| Slew Rate | 6V/µs - ensures faithful reproduction of 1Vpp signals up to ~950kHz without slew-induced distortion. |
| Input Offset Voltage | ±2mV (typ), ±6mV (max) - maintains ≤0.2% error in 12-bit data acquisition systems with 5V full-scale range. |
| Quiescent Current | 0.75mA per channel - allows dual-channel operation on coin-cell or energy-harvesting supplies. |
| Shutdown Current | 10nA - reduces total system standby power to sub-µW levels when amplifiers are inactive. |
| Input Voltage Noise | 25nV/√Hz @ 1kHz - suitable for low-level sensor outputs (e.g., thermopiles, strain gauges) without dominant noise contribution. |
Pinout & Package
OPA2341DGSA/2K5 is housed in a 10-pin MSOP (VSSOP) package (drawing DGS), 3.0mm × 3.0mm footprint, 0.5mm pitch, 1.0mm height - optimized for space-constrained PCB layouts in portable instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V+) | Positive Supply Rail | Accepts 2.5V–5.5V single supply; requires local 0.01µF ceramic bypass to ground. |
| 2 (Out B) | Amplifier B Output | Rail-to-rail swing to within 1mV of V+ or V− with 100kΩ load; drives ADC inputs directly. |
| 3 (–In B) | Inverting Input B | High-impedance node (10¹³Ω || 6pF); accepts signals from –0.3V to V+ +0.3V. |
| 4 (+In B) | Non-inverting Input B | Complementary CMOS input pair enables rail-to-rail common-mode range beyond supply rails. |
| 5 (SD B) | Shutdown Control B | CMOS input: <(V−)+0.8V = disable, >(V−)+2V = active; controls only Channel B independently. |
| 6 (Out A) | Amplifier A Output | Fully independent output; <5µV/V dc coupling to Channel B ensures isolated signal paths. |
| 7 (–In A) | Inverting Input A | Electrically isolated from Channel B; supports differential configurations without crosstalk. |
| 8 (+In A) | Non-inverting Input A | Same rail-to-rail input specification as Channel B; usable across full temperature range. |
| 9 (V−) | Negative Supply Rail | Typically grounded in single-supply systems; establishes reference for rail-to-rail operation. |
| 10 (SD A) | Shutdown Control A | Independent enable/disable for Channel A; allows asymmetric power management per channel. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables maximum dynamic range in 3.3V systems: input accepts 0–3.3V, output delivers 0–3.3V with <1mV headroom. |
| Independent dual-channel shutdown | Per-amplifier SD pins allow selective power gating - e.g., keep Channel A active for bias while disabling Channel B during idle cycles. |
| Low input bias current (±0.6pA typ) | Preserves signal integrity in high-impedance sensor interfaces (e.g., pH electrodes, piezoelectric transducers) without loading errors. |
| Specified over –55°C to +125°C | Validates performance in automotive engine compartments, industrial PLCs, and downhole equipment without derating. |
| 0.1% settling time: 1µs | Meets timing budgets for 100kSPS SAR ADCs with pipeline latency ≤10µs, including anti-aliasing filter settling. |
Applications
| Industrial Sensor Signal Conditioning | Data Acquisition Front-End |
|---|---|
Use Scenario: Amplifying low-level mV-range outputs from RTDs, thermocouples, or bridge sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Dual-channel OPA2341DGSA/2K5 provides simultaneous excitation current sourcing (Channel A) and ratiometric measurement amplification (Channel B) with matched drift. Use Value: 76dB CMRR and ±2µV/°C offset drift ensure ≤0.1°C measurement error over –40°C to +85°C ambient without calibration. |
Use Scenario: Buffering and filtering analog inputs prior to 12-bit SAR ADCs in portable test equipment. IC Role / Device Role / Timing Role: OPA2341DGSA/2K5 serves as unity-gain buffer with RC anti-aliasing network, synchronized to ADC sample clock via shutdown control. Use Value: 1µs 0.1% settling guarantees full-scale accuracy at 100kSPS; shutdown cuts channel power between samples, reducing average current by 99.5%. |
| Portable Medical Instrumentation | Process Control Loop Interface |
Use Scenario: Biopotential signal amplification (ECG, EEG) in battery-powered patient monitors with strict power budgets. IC Role / Device Role / Timing Role: OPA2341DGSA/2K5 configures as high-input-impedance instrumentation amplifier front-end with independent shutdown per electrode channel. Use Value: 0.75mA/channel quiescent current and 10nA shutdown current extend AA battery life to >12 months in intermittent-use devices. |
Use Scenario: Converting 4–20mA loop currents to voltage for PLC analog inputs in factory automation systems. IC Role / Device Role / Timing Role: OPA2341DGSA/2K5 operates as precision I/V converter (Channel A) and loop-powered sensor excitation driver (Channel B). Use Value: Rail-to-rail output swings to 0–5V across full 4–20mA range; ±6mV max offset ensures <0.05% FSR error in 16-bit control systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | No shutdown function; lower offset (±2µV), higher IQ (17µA), same MSOP-10 package. | Better for ultra-precision DC-coupled systems where power gating is unnecessary. | Select OPA2333AIDR when µV-level offset stability outweighs need for shutdown; not drop-in due to missing SD pins. |
| MCP6V82-E/MS | Zero-drift architecture; 0.25µV max offset, 1.1mA IQ, no shutdown, 8-pin MSOP package. | Superior for long-term DC stability in weigh scales or precision thermometry. | Choose MCP6V82-E/MS for zero-drift requirements; requires PCB redesign due to 8-pin vs. 10-pin pinout and absent shutdown controls. |
Compared with OPA2341DGSA/2K5, OPA2333AIDR trades shutdown capability for nanovolt-level offset stability, while MCP6V82-E/MS eliminates 1/f noise at the cost of higher quiescent current and no power-gating - making OPA2341DGSA/2K5 optimal for battery-powered, multi-channel, moderate-precision signal chains requiring dynamic power control.
Availability
OPA2341DGSA/2K5 is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable data loggers, and medical monitoring equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2341DGSA/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 is a global semiconductor leader specializing in analog and embedded processing technologies, with over 50 years of innovation in precision amplifiers and signal chain solutions.
The OPA2341DGSA/2K5 belongs to TI's microAmplifier™ series - engineered specifically for low-voltage, space-constrained, single-supply applications demanding rail-to-rail performance, low power, and robust industrial temperature operation.
FAQ
What is the operating temperature range for the OPA2341DGSA/2K5?
The OPA2341DGSA/2K5 is fully specified from –55°C to +125°C and operates reliably from –55°C to +150°C. Electrical parameters such as input offset voltage drift (±2µV/°C), CMRR (76dB min), and quiescent current (0.75–1.2mA) are guaranteed across the full –55°C to +125°C range, making it suitable for under-hood automotive and industrial control environments where thermal stress is critical. The OPA2341DGSA/2K5 junction temperature must not exceed 150°C.
Does the OPA2341DGSA/2K5 support true rail-to-rail input and output?
Yes, the OPA2341DGSA/2K5 supports true rail-to-rail input and output. Its complementary CMOS input stage extends the common-mode voltage range to (V−) − 0.3V and (V+) + 0.3V, while the class AB output stage delivers swing to within 1mV of either rail into a 100kΩ load. This capability is verified across the full –55°C to +125°C temperature range and enables full utilization of 3.3V or 5V supply rails in single-supply systems without external level-shifting circuitry.
How does the shutdown feature work on the OPA2341DGSA/2K5?
The OPA2341DGSA/2K5 features two independent CMOS-compatible shutdown pins: SD A (Pin 10) and SD B (Pin 5). Driving either pin below (V−) + 0.8V disables the corresponding amplifier, reducing its quiescent current to 10nA. Asserting above (V−) + 2V activates the channel. Turn-off time is 1µs and turn-on time is 3µs. This per-channel control allows asymmetric power management - for example, keeping one amplifier active for bias generation while shutting down the other during ADC conversion idle periods.
Can the OPA2341DGSA/2K5 drive capacitive loads, and what is the recommended approach?
The OPA2341DGSA/2K5 can drive up to 1000pF in unity-gain configuration without instability. For larger capacitive loads (e.g., ADC input capacitance + PCB trace), TI recommends adding a 10Ω–20Ω series resistor between the output and load. This isolates the op amp's output impedance from the capacitive reactance, improving phase margin. With RL = 10kΩ and RS = 20Ω, the resulting DC error is only ~0.2%, preserving accuracy while ensuring stability - a technique validated in the OPA2341DGSA/2K5 typical characteristics and application diagrams.
What are the absolute maximum ratings for the OPA2341DGSA/2K5 supply voltage and input voltage?
The OPA2341DGSA/2K5 has an absolute maximum supply voltage of 6.0V (V+ to V−), and input terminals are diode-clamped to the rails - limiting the absolute maximum input voltage to (V−) − 0.5V and (V+) + 0.5V. Exceeding these values risks permanent damage. For inputs swinging beyond the rails by >300mV, TI mandates current limiting to ≤10mA using external series resistors, as shown in Figure 3 of the SBOS202A datasheet. These limits apply regardless of operating temperature or duration.
OPA2341DGSA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 6V/µs
- Gain Bandwidth Product:
- 5.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.6 pA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 750µA (x2 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
OPA2341DGSA/2K5 FAQ
1.How can I place an order for OPA2341DGSA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2341DGSA/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 OPA2341DGSA/2K5 reliable?
The price and inventory of OPA2341DGSA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2341DGSA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA2341DGSA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2341DGSA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2341DGSA/2K5?
OPA2341DGSA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2341DGSA/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 OPA2341DGSA/2K5?
For technical support, including OPA2341DGSA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2341DGSA/2K5 requirements.
6.How does Aetrix verify that OPA2341DGSA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA2341DGSA/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 OPA2341DGSA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA2341DGSA/2K5?
All OPA2341DGSA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2341DGSA/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 OPA2341DGSA/2K5 part is unused and in its original packaging.
Return procedure for OPA2341DGSA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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