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Texas Instruments OPA300AID
- Part No.:
- OPA300AID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA300AID.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,465
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Product details
Overview
OPA300AID from Texas Instruments is a single-channel, high-speed, low-noise CMOS operational amplifier optimized for 16-bit ADC input driving. It delivers 150MHz unity-gain bandwidth, 3nV/√Hz input voltage noise, and 150ns 16-bit settling time. Operates from +2.7V to +5.5V single supply with shutdown capability (5µA quiescent current), housed in an SOIC-8 package.
For engineers reviewing the OPA300AID datasheet, OPA300AID pinout, OPA300AID application, or OPA300AID equivalent, key selection criteria include its 150MHz bandwidth, rail-to-rail output swing (±100mV from rails), 0.003% THD+N at 1kHz, enable-controlled power gating, and industrial temperature range (−40°C to +125°C).
Technical Context
The OPA300AID uses a classic two-stage CMOS topology with folded-cascode input and Class AB output stage, enabling both high slew rate (80V/μs) and unity-gain stability. Its differential input pair is biased for optimal speed-stability trade-off, supporting fast settling without external compensation.
It features a CMOS enable input referenced to V−, requiring ≥2.5V above V− to activate and ≤0.8V above V− to disable. When disabled, the output enters high-impedance state-enabling multiplexed analog bus architectures without external isolation switches.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-gain bandwidth | 150MHz - supports stable closed-loop operation up to 150MHz at gain = 1, critical for wideband signal conditioning. |
| 16-bit settling time | 150ns - ensures full 16-bit accuracy within 150ns after step input, matching high-speed ADC sampling clocks. |
| Input voltage noise density | 3nV/√Hz - enables low-noise preamplification of microvolt-level sensor signals without degrading SNR. |
| THD+N @ 1kHz | 0.003% - preserves signal fidelity in precision instrumentation and audio front-ends. |
| Supply voltage range | +2.7V to +5.5V - compatible with Li-ion, USB, and standard logic-supply rails; no dual-supply required. |
| Shutdown current | 5µA - reduces system standby power by >99% vs active mode (9.5mA), extending battery life in portable systems. |
| Output voltage swing | V− + 100mV to V+ − 100mV (RL ≥ 2kΩ) - maximizes dynamic range in single-supply data acquisition chains. |
Pinout & Package
OPA300AID is packaged in an 8-pin SOIC (SO-8, package code D), with exposed pad not present. Pin functions are fully defined per TI SBOS271F Rev F.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Enable | Digital control input; high-impedance CMOS logic that places amplifier in high-Z output state when low. |
| 2 | −In | Inverting input node; differential pair input with 10¹³Ω||3pF impedance and ±0.1pA bias current. |
| 3 | +In | Non-inverting input node; matched to −In for common-mode rejection and precision DC performance. |
| 4 | V− | Negative supply terminal; reference for enable logic and internal biasing; supports single-supply operation down to 2.7V. |
| 5 | NC | No connection - internally unconnected; must be left floating or tied to ground per layout best practice. |
| 6 | VOUT | Analog output; rail-to-rail capable with 75–100mV headroom into 2kΩ load; drives capacitive loads up to ~5pF stably. |
| 7 | V+ | Positive supply terminal; supplies internal bias and output stage; absolute max rating is 7V. |
| 8 | NC | No connection - internally unconnected; must be left floating or tied to ground per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| 150MHz unity-gain bandwidth | Enables accurate amplification of IF/RF signals up to 75MHz in non-inverting configuration without phase loss. |
| 16-bit settling in 150ns | Meets timing budget for 1.25MSPS 16-bit ADCs like ADS8401, eliminating need for external sample-hold circuits. |
| 3nV/√Hz input voltage noise | Preserves SNR in low-amplitude sensor interfaces (e.g., piezoelectric, strain gauge) without requiring gain-stage noise optimization. |
| Shutdown to 5µA | Allows dynamic power management in multi-channel systems-only active channels consume full 9.5mA quiescent current. |
| Rail-to-rail output swing (±100mV) | Maximizes usable ADC input range on single 5V supply, increasing effective resolution by up to 0.7 bits vs limited-swing op amps. |
Applications
| 16-bit ADC Input Driver | Low-Noise Preamplifier |
|---|---|
Use Scenario: Driving the analog input of a 1.25MSPS 16-bit SAR ADC (e.g., ADS8401) in a portable data logger. IC Role / Device Role / Timing Role: High-fidelity buffer and gain stage with precise 150ns settling to meet ADC aperture uncertainty requirements. Use Value: Eliminates external RC filtering and reduces total harmonic distortion to −99.3dB, preserving SFDR >100dB. |
Use Scenario: Amplifying microvolt-level outputs from MEMS accelerometers or thermopile sensors in industrial monitoring. IC Role / Device Role / Timing Role: First-stage low-noise, DC-coupled amplifier with ultra-low input bias current (±0.1pA) and minimal offset drift. Use Value: Maintains 16-bit ENOB over temperature (−40°C to +125°C) without recalibration due to <2.5μV/°C dVOS/dT. |
| IF/RF Signal Conditioning | Active Filtering |
Use Scenario: Buffering and level-shifting 10–50MHz intermediate frequency signals in SDR receiver front-ends. IC Role / Device Role / Timing Role: Wideband voltage follower with 150MHz GBW and 80V/μs slew rate to preserve signal integrity across band. Use Value: Delivers flat gain response (<0.1dB ripple) up to 40MHz and −70dBc 2nd/3rd harmonics at 10MHz. |
Use Scenario: Implementing 4th-order anti-aliasing or reconstruction filters in high-resolution DAC/ADC signal chains. IC Role / Device Role / Timing Role: Unity-gain stable, low-distortion building block for MFB and Sallen-Key topologies with tight component tolerance. Use Value: Enables filter Q-factor >10 without peaking or oscillation, even with PCB parasitics up to 2pF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA301AID | No enable pin; 5-pin SOT-23 or 8-pin SOIC; identical bandwidth/noise but lacks shutdown function. | Suitable where continuous operation is required and board space is constrained (SOT-23-5 option available). | Select OPA301AID only if power gating is unnecessary and smaller footprint is prioritized over feature set. |
| LMH6629MA/NOPB | Higher 1.5GHz GBW, 1.3nV/√Hz noise, but 12mA IQ and no shutdown; SOIC-8, same pin count but different pinout. | Better for >100MHz RF gain stages; unsuitable for battery-powered systems due to higher quiescent current. | Choose LMH6629MA/NOPB only when bandwidth >500MHz small-signal gain or sub-2nV/√Hz noise is mandatory. |
Compared with OPA301AID, OPA300AID adds enable control and NC pins in SOIC-8, trading off pin compatibility for power management. Versus LMH6629MA/NOPB, it sacrifices bandwidth and noise performance for 60% lower supply current and integrated shutdown-making it optimal for portable 16-bit data acquisition where power and integration outweigh raw speed.
Availability
OPA300AID is available at Aetrix Electronics and suitable for high-speed data acquisition, portable instrumentation, and industrial sensor interface applications requiring stable component supply across extended temperature ranges.
Supply support for OPA300AID 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 interfaces.
The OPAx30x series-including OPA300AID-is designed specifically for 16-bit resolution signal chains, emphasizing low noise, fast settling, and single-supply operability in compact packages for portable and industrial measurement systems.
FAQ
What is the maximum capacitive load the OPA300AID can drive stably in unity-gain configuration?
The OPA300AID can drive up to ~5pF of capacitive load stably in unity-gain configuration without external compensation, as verified in Figure 5-16 of the SBOS271F datasheet. For larger loads (e.g., >10pF), a series resistor (RS) between output and load is required-e.g., 20Ω for 100pF-to maintain phase margin and prevent peaking. Layout parasitics must be minimized, especially near the output pin, to avoid unintended instability.
Does the OPA300AID support dual-supply operation?
The OPA300AID is specified for single-supply operation from +2.7V to +5.5V, but it can operate on split supplies (e.g., ±2.75V) as long as total voltage remains ≤5.5V and both rails stay within absolute maximum ratings (V+ ≤7V, V− ≥−7V). However, the enable pin is referenced to V−, so logic levels must be referenced accordingly-TI confirms functionality in split-supply setups per Section 6.6 of SBOS271F.
What is the typical output voltage swing of the OPA300AID at 5V supply with 2kΩ load?
At VS = 5V and RL = 2kΩ, the OPA300AID delivers a typical output swing of V− + 100mV to V+ − 100mV (i.e., 0.1V to 4.9V), as specified in Section 5.4 Electrical Characteristics. This rail-to-rail performance ensures >96% of full-scale range utilization for 16-bit ADCs, directly improving effective number of bits (ENOB) in data acquisition systems.
How does the enable function affect output behavior during shutdown?
When the enable pin is driven low (<0.8V above V−), the OPA300AID disables its internal circuitry and places the output in a high-impedance (Hi-Z) state-neither sourcing nor sinking current. This allows multiple OPA300AID outputs to share a common analog bus without contention, as confirmed in Section 6.6 and Figure 5-5 of SBOS271F. Output recovery time is 10µs after enable assertion.
Is the OPA300AID pin-compatible with other members of the OPAx30x family?
No-OPA300AID (SOIC-8 with Enable and two NC pins) is not pin-compatible with OPA301AID (SOIC-8 without Enable, no NC pins) or OPA300AIDBVT (SOT-23-6). Pin mapping differs across variants: OPA300AID uses pins 1 (Enable), 5 & 8 (NC); OPA301AID repurposes those pins for functionality or omits them entirely. Always verify pinout against Figure 4-3 and Table 4-1 in SBOS271F before PCB layout.
OPA300AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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
OPA300AID FAQ
1.How can I place an order for OPA300AID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA300AID 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 OPA300AID reliable?
The price and inventory of OPA300AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA300AID is usually 5 days.
3.What payment methods are accepted for OPA300AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA300AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA300AID?
OPA300AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA300AID 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 OPA300AID?
For technical support, including OPA300AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA300AID requirements.
6.How does Aetrix verify that OPA300AID is sourced from the original manufacturer or authorized distributors?
All OPA300AID 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 OPA300AID meets industry standards.
7.What is the process for return or replacement of OPA300AID?
All OPA300AID units undergo pre-shipment inspection (PSI). If there is an issue with OPA300AID, 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 OPA300AID part is unused and in its original packaging.
Return procedure for OPA300AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA300AID Tags
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