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Texas Instruments OPA301AIDR
- Part No.:
- OPA301AIDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA301AIDR.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,678
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Product details
Overview
OPA301AIDR from Texas Instruments is a single-channel, low-noise, fast-settling CMOS operational amplifier optimized for 16-bit ADC input driving. It delivers 150MHz unity-gain bandwidth, 3nV/√Hz input voltage noise, and 150ns settling to 16-bit accuracy at 5V supply, operating from +2.7V to +5.5V in SOIC-8 package.
For engineers reviewing the OPA301AIDR datasheet, OPA301AIDR pinout, OPA301AIDR application, or OPA301AIDR equivalent, key selection criteria include its rail-to-rail output swing (±100mV), shutdown current of 5µA, THD+N of 0.003% at 1kHz, and compatibility with high-speed data acquisition systems requiring precision analog front-end performance.
Technical Context
The OPA301AIDR implements a classic two-stage CMOS topology with folded-cascode gain stage and Class AB output driver, enabling unity-gain stability and 80V/µs slew rate. Its input stage features ultra-low bias current (±0.1pA typ) and high impedance (10¹³ Ω || 3pF), supporting high-impedance sensor interfaces without signal degradation.
Unlike the OPA300, the OPA301AIDR lacks an enable/shutdown pin - confirmed by pin configuration diagrams (Fig 4-4) and Table 4-1, where pins 1 and 5 are marked NC and no Enable function is listed. It is specified over −40°C to +125°C and supports single-supply operation with common-mode input range extending to (V−) − 0.2V and (V+) − 0.9V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 150MHz unity-gain bandwidth enables stable amplification of signals up to ~75MHz in closed-loop G=2 configuration. |
| Settling Time | 150ns to 16-bit accuracy ensures precise sampling for 1.25MSPS ADCs like ADS8401 without aperture error. |
| Voltage Noise | 3nV/√Hz at >1MHz preserves SNR in wideband preamplifier stages before digitization. |
| THD+N | 0.003% at 1kHz, 3VPP output minimizes harmonic distortion in IF/RF signal chains and active filters. |
| Supply Range | +2.7V to +5.5V single supply simplifies power design in portable and industrial instrumentation. |
| Output Swing | Within 100mV of rails (RL = 2kΩ) supports full-scale utilization of 16-bit ADC input ranges. |
| Input Bias Current | ±0.1pA typical enables direct connection to high-impedance sources (e.g., piezoelectric sensors, photodiode transimpedance nodes) without significant offset drift. |
Pinout & Package
OPA301AIDR is housed in an 8-pin SOIC (D) package per TI's orderable information and mechanical drawings. Pin 1 and Pin 5 are No Connect (NC); functional pins follow standard op-amp configuration with non-inverting input on Pin 3, inverting input on Pin 2, output on Pin 6, V+ on Pin 7, and V− on Pin 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | No Connection | Unbonded; must be left floating or tied to ground per layout best practice - no internal circuitry attached. |
| Pin 2 | Inverting Input (−In) | Differential input node; accepts feedback network for closed-loop gain control and signal inversion. |
| Pin 3 | Non-Inverting Input (+In) | High-impedance input node; used for reference biasing or non-inverting signal routing. |
| Pin 4 | Negative Supply (V−) | Ground or negative rail connection; defines lower common-mode and output swing limit. |
| Pin 5 | No Connection | Unbonded; no internal connection - avoid routing traces or placing vias directly beneath. |
| Pin 6 | Output (VOUT) | Class AB buffered output capable of sourcing/sinking ≥70mA; drives 100Ω loads while maintaining >95dB open-loop gain. |
| Pin 7 | Positive Supply (V+) | Primary power rail; supplies internal bias and output stage - requires local 0.1µF ceramic bypass to V−. |
| Pin 8 | Not Used / NC | Per Figure 4-4 and Table 4-1, Pin 8 has no function - not an enable pin (unlike OPA300). |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable architecture | Eliminates need for external compensation components in G ≥ 1 configurations, reducing BOM count and board area. |
| Rail-to-rail output swing | Delivers >4.8VPP output from 5V supply into 2kΩ load, maximizing dynamic range for 16-bit ADC drivers. |
| Ultra-low input voltage noise | 3nV/√Hz density ensures minimal added noise floor when amplifying low-level signals from precision sensors. |
| High open-loop gain | 106dB typical AOL maintains <1ppm gain error in precision gain blocks with 1000× closed-loop gain. |
| Wide common-mode input range | Operates with inputs as low as (V−) − 0.2V, enabling level-shifting and single-supply interfacing with bipolar signal sources. |
Applications
| 16-bit ADC Input Driver | Low-Noise Preamplifier |
|---|---|
Use Scenario: Driving the analog input of the ADS8401 16-bit, 1.25MSPS SAR ADC in a single-supply 5V data acquisition system. IC Role / Device Role / Timing Role: Precision buffer and gain stage providing fast settling (<150ns), low THD+N (0.003%), and full-scale output swing to maximize ENOB. Use Value: Enables verified 84.3dB SNR and 101.2dB SFDR in production systems, meeting 16-bit linearity requirements without post-processing correction. | Use Scenario: Amplifying microvolt-level outputs from MEMS accelerometers or strain-gauge bridges in structural health monitoring equipment. IC Role / Device Role / Timing Role: First-stage gain block with ultra-low input bias current (±0.1pA) and 3nV/√Hz noise, preserving signal integrity before filtering and digitization. Use Value: Maintains >110dB dynamic range at 10kHz while rejecting thermal drift - critical for DC-coupled, low-frequency measurement accuracy. |
| IF/RF Amplifier | Active Filtering |
Use Scenario: Intermediate frequency amplification in 10–100MHz wireless receiver front-ends, such as in spectrum analyzers or software-defined radios. IC Role / Device Role / Timing Role: Fixed-gain, broadband voltage amplifier with 150MHz GBW and 80V/µs slew rate, supporting clean small-signal amplification without phase distortion. Use Value: Delivers flat gain response within ±0.1dB up to 50MHz (per Fig 5-6), minimizing group delay variation across channel bandwidth. | Use Scenario: Implementing 4th-order low-pass anti-aliasing filter preceding a high-speed ADC in medical ultrasound beamforming modules. IC Role / Device Role / Timing Role: Dual-op-amp section (e.g., using OPA2301) configured as MFB or Sallen-Key topology with precise pole placement. Use Value: Achieves >60dB stopband attenuation at 1.5× Nyquist frequency while maintaining passband ripple <0.05dB - validated in TI reference design TIPD182. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA300AIDR | Includes enable/shutdown pin (Pin 8); otherwise identical AC specs and pinout except for NC vs Enable mapping. | Required where power cycling or battery-saving shutdown is needed; incompatible if PCB uses Pin 8 as NC. | Select OPA300AIDR only if system-level power sequencing mandates active shutdown - OPA301AIDR is preferred for fixed-on, low-noise applications. |
| OPA837IDBVR | Higher 310MHz GBW, 110V/µs slew rate, but higher 4.3nV/√Hz noise and 13.5mA IQ; SOT-23-5 package. | Better suited for >100MHz signal chain stages where speed outweighs noise/power trade-offs. | Choose OPA837IDBVR when bandwidth >200MHz is required and 16-bit settling time is secondary to raw speed. |
Compared with OPA300AIDR, OPA301AIDR removes the enable function to improve PSRR and reduce die area - making it more suitable for always-on, noise-sensitive ADC drivers. Versus OPA837IDBVR, it trades bandwidth for lower noise and quiescent current, better matching 16-bit precision system requirements.
Availability
OPA301AIDR is available at Aetrix Electronics and suitable for high-speed data acquisition, precision instrumentation, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for OPA301AIDR 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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The OPAx30x product line was designed specifically for 16-bit resolution systems demanding low noise, fast settling, and rail-to-rail output swing in compact packages - targeting high-fidelity data acquisition and precision analog front-ends.
FAQ
What is the maximum capacitive load the OPA301AIDR can drive stably in unity-gain configuration?
The OPA301AIDR supports stable unity-gain operation with ≤5pF total capacitive load, including PCB parasitics. As shown in Figure 5-16, adding a 40Ω series resistor enables stable operation with 10pF loads. Layout practices must minimize trace capacitance - typical board parasitics exceeding 1pF risk peaking or oscillation without external isolation resistance.
Does the OPA301AIDR have a shutdown or enable pin?
No, the OPA301AIDR does not include a shutdown or enable pin. Pin 8 is unconnected (NC), and Figures 4-4 and Table 4-1 confirm no enable functionality. This distinguishes it from the OPA300AIDR, which uses Pin 8 as an enable input referenced to V−. The OPA301AIDR is intended for always-on operation.
What is the common-mode input voltage range for the OPA301AIDR at 5V supply?
At VS = 5V, the OPA301AIDR supports a common-mode input range from (V−) − 0.2V to (V+) − 0.9V, i.e., −0.2V to +4.1V when V− = 0V. This allows input signals to extend 200mV below ground and remain 900mV below the positive rail - essential for single-supply interfacing with bipolar signal sources.
Can the OPA301AIDR drive a 100Ω load while maintaining 16-bit accuracy?
Yes, the OPA301AIDR delivers 300–500mV from each rail into 100Ω loads (per Section 5.4), yielding ~4.0VPP output swing at 5V supply. Settling time degrades to 90ns (0.01%) under this condition, still sufficient for 1.25MSPS ADCs. Output impedance remains <20Ω up to 1MHz (Fig 5-28), ensuring minimal gain error.
Is the OPA301AIDR suitable for driving ADCs with differential input architectures?
Yes - the OPA301AIDR is commonly used in single-ended-to-differential conversion circuits with a second matched amplifier or transformer. Its low THD+N (0.003%), 150MHz bandwidth, and excellent channel matching (when paired with OPA2301) support high-performance differential ADC drivers like those for ADS8401, as validated in TI's TIPD182 reference design.
OPA301AIDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 80V/µs
- Gain Bandwidth Product:
- 150 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 9.5mA
- Current - Output / Channel:
- 70 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA301AIDR FAQ
1.How can I place an order for OPA301AIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA301AIDR 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 OPA301AIDR reliable?
The price and inventory of OPA301AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA301AIDR is usually 5 days.
3.What payment methods are accepted for OPA301AIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA301AIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA301AIDR?
OPA301AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA301AIDR 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 OPA301AIDR?
For technical support, including OPA301AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA301AIDR requirements.
6.How does Aetrix verify that OPA301AIDR is sourced from the original manufacturer or authorized distributors?
All OPA301AIDR 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 OPA301AIDR meets industry standards.
7.What is the process for return or replacement of OPA301AIDR?
All OPA301AIDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA301AIDR, 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 OPA301AIDR part is unused and in its original packaging.
Return procedure for OPA301AIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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