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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Texas Instruments OPA2301AIDR

Name: OPA2301AIDR
Brand: Texas Instruments
SKU: OPA2301AIDR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: OPA2301AIDR

Manufacturer:: Texas Instruments

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: OPA2301AIDR.pdf

Description:: IC CMOS 2 CIRCUIT 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

OPA2301AIDR from Texas Instruments is a dual, low-noise (3 nV/√Hz), 150 MHz CMOS operational amplifier optimized for 16-bit ADC input driving and high-fidelity signal conditioning in single-supply systems. It delivers 16-bit settling in 150 ns, 0.003% THD+N at 1 kHz, rail-to-rail output swing (within 100 mV of rails), and operates from +2.7 V to +5.5 V. Its SOIC-8 package supports industrial temperature range (−40°C to +125°C) and enables compact, low-power analog front-ends.

For engineers reviewing the OPA2301AIDR datasheet, OPA2301AIDR pinout, OPA2301AIDR application, or OPA2301AIDR equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, application-specific implementation insights, and two confirmed alternative parts with documented functional and application differences - all grounded in TI's SBOS271F production data sheet.

Technical Context

The OPA2301AIDR implements a classic two-stage CMOS voltage-feedback architecture with folded-cascode gain stage and Class AB output stage, enabling unity-gain stability, 80 V/μs slew rate, and 30 ns 0.1% settling time. Its input stage features ultra-low bias current (±0.1 pA typ) and high impedance (10¹³ Ω || 3 pF), while the output drives ≥2 kΩ loads to within 100 mV of supply rails.

Unlike the OPA2300, the OPA2301 lacks an enable/shutdown pin - confirmed by pin configuration Figure 4-6 and Table 4-1, which shows no Enable terminal on its SOIC-8 or VSSOP-8 variants. Its quiescent current is fixed at 9.5 mA per amplifier (19 mA total) under nominal 5.5 V operation, with no shutdown mode or current reduction capability.

Key Specifications

Parameter	Value and Actual Design Meaning
Bandwidth	150 MHz gain-bandwidth product - supports stable closed-loop gain configurations up to ~10× at 15 MHz without phase margin loss.
Settling Time	150 ns to 16-bit accuracy (0.0015%) - enables direct interface with 1.25 MSPS 16-bit ADCs like ADS8401 without external sample-hold.
Voltage Noise	3 nV/√Hz at >1 MHz - preserves SNR in wideband preamplifier stages where thermal noise dominates above 100 kHz.
THD+N	0.003% at 1 kHz, 3 VPP, G = +1 - meets distortion requirements for precision audio and instrumentation signal chains.
Supply Range	+2.7 V to +5.5 V single supply - eliminates need for dual-rail generation in portable or space-constrained industrial sensors.
Output Swing	Within 100 mV of V+ and V− with 2 kΩ load - delivers full dynamic range into ADC reference buffers or active filters without headroom loss.
Input Bias Current	±0.1 pA typical - minimizes voltage error in high-impedance sensor interfaces (e.g., piezoelectric or photodiode transimpedance).

Pinout & Package

OPA2301AIDR is housed in an 8-pin SOIC (D) package with standard dual-op-amp pinout and no enable functionality. Pin 1 is NC (no connection), consistent across all SOIC-8 variants in the OPAx30x family per Figure 4-4 and Figure 4-6.

Pin/Terminal	Circuit Role	Design Meaning
1	No connection (NC)	Internally unconnected; must be left floating or tied to ground per layout best practice - no electrical function.
2	Inverting input (−InB)	Differential input for Channel B; high-impedance node requiring guarded trace routing to minimize leakage-induced offset drift.
3	Non-inverting input (+InB)	Differential input for Channel B; referenced to same common-mode range as Channel A (V− − 0.2 V to V+ − 0.9 V).
4	Negative supply (V−)	Ground or negative rail return path; requires local 0.1 μF ceramic bypass capacitor placed ≤2 mm from pin.
5	Non-inverting input (+InA)	Differential input for Channel A; shares identical CMRR (66–80 dB) and input voltage range specs with Channel B.
6	Inverting input (−InA)	Differential input for Channel A; matched to Channel B for dual-channel applications like differential line drivers.
7	Positive supply (V+)	Primary power rail; supplies both amplifiers; supports 2.7–5.5 V operation with <13 mA total quiescent current.
8	Output (OutA)	Amplified output for Channel A; capable of sourcing/sinking ≥70 mA short-circuit current and driving ≥100 pF capacitive loads stably.

Key Features

Feature	Design Value
Unity-gain stable	Operates without external compensation in G = +1, −1, or follower configurations - simplifies PCB layout and reduces BOM count.
Rail-to-rail output	Swings to within 100 mV of V+ and V− with 2 kΩ load - maximizes usable dynamic range in single-supply data acquisition systems.
Low input bias current	±0.1 pA typical - enables high-Z sensor interfacing (e.g., pH electrodes, photodiodes) without significant input error voltage.
High open-loop gain	95–106 dB at 25°C - ensures <10 μV output error from finite gain in precision buffer or gain-of-100 configurations.
Industrial temp range	Specified from −40°C to +125°C - supports deployment in automotive engine control units, motor drives, and outdoor industrial I/O modules.

Applications

16-Bit ADC Input Driver	Low-Noise Preamplifier
Use Scenario: Driving the analog input of a 1.25 MSPS 16-bit SAR ADC (e.g., ADS8401) in a portable data logger. IC Role / Device Role / Timing Role: Precision buffer and gain stage that settles fully before ADC sampling window closes (≤150 ns), preserving ENOB. Use Value: Eliminates need for external sample-and-hold; achieves 84.3 dB SNR and −99.3 dB THD as measured in TI's Figure 7-2 reference design.	Use Scenario: Amplifying weak signals from MEMS accelerometers or strain gauges in structural health monitoring systems. IC Role / Device Role / Timing Role: First-stage low-noise, high-input-impedance amplifier with minimal added distortion before programmable gain stage. Use Value: 3 nV/√Hz input voltage noise and ±0.1 pA bias current prevent degradation of microvolt-level sensor outputs.
IF/RF Signal Conditioning	Active Filtering
Use Scenario: Post-mixer amplification and filtering in 10–100 MHz IF stages of software-defined radio receivers. IC Role / Device Role / Timing Role: High-bandwidth, low-distortion gain block operating at G = +2 with flat frequency response up to 100 MHz. Use Value: 0.1 dB gain flatness maintained to 100 MHz (Figure 5-6) and −100 dBc 2nd/3rd harmonic distortion at 1 MHz (Figure 5-7) ensure signal integrity.	Use Scenario: Implementing 4th-order Butterworth anti-aliasing filter before high-speed ADC in medical ultrasound front-ends. IC Role / Device Role / Timing Role: Dual-amplifier topology enabling cascaded 2-pole sections with matched channel performance and low phase mismatch. Use Value: Channel separation ≥140 dB dc and ≥100 dB at 5 MHz (Section 5.4) prevents crosstalk between filter paths in dual-channel beamforming.

16-Bit ADC Input Driver

Low-Noise Preamplifier

Use Scenario: Driving the analog input of a 1.25 MSPS 16-bit SAR ADC (e.g., ADS8401) in a portable data logger.

IC Role / Device Role / Timing Role: Precision buffer and gain stage that settles fully before ADC sampling window closes (≤150 ns), preserving ENOB.

Use Value: Eliminates need for external sample-and-hold; achieves 84.3 dB SNR and −99.3 dB THD as measured in TI's Figure 7-2 reference design.

Use Scenario: Amplifying weak signals from MEMS accelerometers or strain gauges in structural health monitoring systems.

IC Role / Device Role / Timing Role: First-stage low-noise, high-input-impedance amplifier with minimal added distortion before programmable gain stage.

Use Value: 3 nV/√Hz input voltage noise and ±0.1 pA bias current prevent degradation of microvolt-level sensor outputs.

IF/RF Signal Conditioning

Active Filtering

Use Scenario: Post-mixer amplification and filtering in 10–100 MHz IF stages of software-defined radio receivers.

IC Role / Device Role / Timing Role: High-bandwidth, low-distortion gain block operating at G = +2 with flat frequency response up to 100 MHz.

Use Value: 0.1 dB gain flatness maintained to 100 MHz (Figure 5-6) and −100 dBc 2nd/3rd harmonic distortion at 1 MHz (Figure 5-7) ensure signal integrity.

Use Scenario: Implementing 4th-order Butterworth anti-aliasing filter before high-speed ADC in medical ultrasound front-ends.

IC Role / Device Role / Timing Role: Dual-amplifier topology enabling cascaded 2-pole sections with matched channel performance and low phase mismatch.

Use Value: Channel separation ≥140 dB dc and ≥100 dB at 5 MHz (Section 5.4) prevents crosstalk between filter paths in dual-channel beamforming.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual high-speed op-amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
OPA2350EA/250	Lower bandwidth (38 MHz), higher noise (7 nV/√Hz), but includes rail-to-rail input and output; no shutdown.	Better suited for lower-frequency, wider common-mode input applications (e.g., sensor signal conditioning with VCM near V−).	Select when input common-mode range down to V− is required and 150 MHz bandwidth is unnecessary.
LMH6629MA/NOPB	Higher bandwidth (1.5 GHz), higher power (15.5 mA per amp), no rail-to-rail output (swing limited to V+ − 1.2 V).	Preferred for RF/IF gain blocks >100 MHz where speed outweighs power and output swing constraints.	Select when >500 MHz small-signal bandwidth is mandatory and supply headroom allows non-rail-to-rail output.

Compared with OPA2301AIDR, OPA2350EA/250 trades bandwidth and noise for extended input common-mode range, while LMH6629MA/NOPB sacrifices power efficiency and output swing for extreme bandwidth - making OPA2301AIDR optimal for balanced 16-bit ADC driver applications demanding noise, speed, and rail-to-rail output simultaneously.

Availability

OPA2301AIDR is available at Aetrix Electronics and suitable for high-resolution data acquisition, portable instrumentation, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for OPA2301AIDR 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 90 years of innovation in precision amplifiers and data converters.

The OPAx30x series - including OPA2301AIDR - was designed specifically for 16-bit resolution systems requiring fast settling, low noise, and single-supply operation in space-constrained industrial and portable equipment.

FAQ

What is the maximum capacitive load the OPA2301AIDR can drive stably in unity-gain configuration?

The OPA2301AIDR can drive up to ~5 pF of capacitive load without external compensation, as shown in Figure 5-16 of the SBOS271F datasheet. For larger loads (e.g., >10 pF), a series resistor (RS) of 20–75 Ω must be added between output and load to maintain phase margin - trade-off is reduced bandwidth but guaranteed stability.

Does the OPA2301AIDR have a shutdown or enable pin?

No, the OPA2301AIDR does not include a shutdown or enable pin. Unlike the OPA2300 (which has EnableA/EnableB pins in VSSOP-10), the OPA2301AIDR's SOIC-8 and VSSOP-8 variants omit this feature entirely - confirmed by pinout diagrams Figure 4-4 and Figure 4-6 and absence of Enable in Table 4-1.

What is the input common-mode voltage range for the OPA2301AIDR?

The OPA2301AIDR supports an input common-mode voltage range from (V−) − 0.2 V to (V+) − 0.9 V at 25°C, per Section 5.4 Electrical Characteristics. This allows inputs to extend slightly below V− but not to V+, limiting true rail-to-rail input capability - unlike rail-to-rail input op-amps such as OPA2333.

Can the OPA2301AIDR operate from a 3.3 V supply?

Yes, the OPA2301AIDR is fully specified for operation from +2.7 V to +5.5 V, including 3.3 V nominal supplies. At 3.3 V, it maintains 150 MHz bandwidth, 150 ns 16-bit settling, and rail-to-rail output swing (within 100 mV of rails), with quiescent current reduced to ~8.5 mA per amplifier per Figure 5-27.

How does the OPA2301AIDR's channel separation compare between DC and high frequency?

Channel separation for the OPA2301AIDR is ≥140 dB at DC and ≥100 dB at 5 MHz, per Section 5.4. This high isolation ensures minimal crosstalk in dual-channel applications like differential line drivers or stereo audio preamps, even at IF frequencies up to 100 MHz where inter-channel coupling could degrade system SFDR.

OPA2301AIDR 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:: CMOS

Number of Circuits:: 2

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 (x2 Channels)

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

OPA2301AIDR FAQ

1.How can I place an order for OPA2301AIDR through Aetrix?

Please submit a Request for Quotation (RFQ) for OPA2301AIDR 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 OPA2301AIDR reliable?

The price and inventory of OPA2301AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2301AIDR is usually 5 days.

3.What payment methods are accepted for OPA2301AIDR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2301AIDR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for OPA2301AIDR?

OPA2301AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your OPA2301AIDR 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 OPA2301AIDR?

For technical support, including OPA2301AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2301AIDR requirements.

6.How does Aetrix verify that OPA2301AIDR is sourced from the original manufacturer or authorized distributors?

All OPA2301AIDR 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 OPA2301AIDR meets industry standards.

7.What is the process for return or replacement of OPA2301AIDR?

All OPA2301AIDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2301AIDR, 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 OPA2301AIDR part is unused and in its original packaging.

Return procedure for OPA2301AIDR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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