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Texas Instruments OPA2810IDCNT
- Part No.:
- OPA2810IDCNT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8
- Datasheet:
-
OPA2810IDCNT.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:638
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Product details
Overview
OPA2810IDCNT from Texas Instruments is a dual-channel, rail-to-rail input/output FET-input operational amplifier optimized for high-fidelity signal acquisition. It delivers 70 MHz gain-bandwidth product, 192 V/µs slew rate at ±12 V supply, 6 nV/√Hz input voltage noise at 500 kHz, and operates across 4.75 V to 27 V total supply range. It is used in multichannel sensor interface front-ends requiring low bias current (2 pA typ) and high linear output drive (75 mA).
For engineers reviewing the OPA2810IDCNT datasheet, OPA2810IDCNT pinout, OPA2810IDCNT application, or OPA2810IDCNT equivalent, this page provides verified specifications, package mapping to SOT-23-8, functional role in transimpedance and buffering stages, and validated alternative options for wideband precision amplification.
Technical Context
The OPA2810IDCNT employs a proprietary SiGe BiCMOS process to achieve unity-gain stability with 105 MHz small-signal bandwidth while maintaining FET-input advantages: ultra-low input bias current (2 pA typ), high input impedance (>12 GΩ), and low input capacitance (0.5 pF). Its dual independent amplifier cores share no internal coupling beyond substrate, with channel-to-channel crosstalk of –93 dBc at 100 kHz.
It integrates auxiliary CMOS input stage functionality for rail-to-rail operation near supply rails, enabling full-range input common-mode voltage (–0.2 V to VS+ + 0.3 V) and output swing (VS– + 0.08 V to VS+ – 0.11 V at 25°C, RL = 667 Ω). DC precision includes ±1.5 mV max input offset and ±2 µV/°C typical drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 70 MHz - sets usable closed-loop bandwidth for G ≥ 1 configurations without instability |
| Slew rate | 192 V/µs at ±12 V - supports fast settling of large-signal steps (e.g., 2-V step settles to 0.1% in 73 ns) |
| Input voltage noise | 6 nV/√Hz at 500 kHz - enables low-noise photodiode transimpedance amplification up to ~10 MHz |
| Supply range | 4.75 V to 27 V total - accommodates single-supply (5 V) and split-supply (±12 V) industrial and test equipment rails |
| Input bias current | 2 pA typical at 25°C - preserves signal integrity in high-Z sensor interfaces and impedance measurement circuits |
| Linear output current | 75 mA per channel - drives ADC inputs, optoelectronic loads, or heavy capacitive loads (up to 35 pF) |
| Operating temperature | –40°C to +125°C - qualified for extended industrial and automotive under-hood applications |
Pinout & Package
OPA2810IDCNT is packaged in an 8-pin SOT-23 (DCN) package with body size 2.90 mm × 1.60 mm, optimized for space-constrained PCB layouts while maintaining thermal performance (RθJA = 130.9°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VO1) | Amplifier 1 output | Delivers rail-to-rail linear output swing; capable of sourcing/sinking 75 mA into 667 Ω load |
| 2 (VIN1–) | Amplifier 1 inverting input | FET-input node with 0.5 pF differential capacitance and >12 GΩ common-mode impedance |
| 3 (VIN1+) | Amplifier 1 noninverting input | High-impedance node supporting precision differential sensing; matched to VIN1– for <2.5 mV offset mismatch |
| 4 (VS–) | Negative power supply | Reference for both amplifiers; accepts ground (0 V) in single-supply mode or negative rail in split-supply mode |
| 5 (VIN2+) | Amplifier 2 noninverting input | Independent high-Z input identical in specs to VIN1+; enables dual-channel synchronous acquisition |
| 6 (VIN2–) | Amplifier 2 inverting input | Matched to VIN1– with ≤3% GBWP mismatch and –93 dBc crosstalk at 100 kHz |
| 7 (VO2) | Amplifier 2 output | Electrically isolated output stage; same drive capability and noise performance as VO1 |
| 8 (VS+) | Positive power supply | Accepts up to +27 V; PSRR of 100 dB at 25°C ensures immunity to supply ripple in noisy environments |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Supports full-scale signal handling from VS– – 0.2 V to VS+ + 0.3 V input, and VS– + 0.08 V to VS+ – 0.11 V output (25°C, RL = 667 Ω) |
| FET-input architecture | 2 pA typical input bias current enables high-impedance photodiode and piezoelectric sensor interfacing without leakage-induced error |
| Low 1/f noise | 0.42 µVrms integrated from 0.1 Hz to 10 Hz - critical for precision DC-coupled instrumentation and impedance measurements |
| Unity-gain stable | No external compensation required; stable at G = 1 with 105 MHz bandwidth and <10% overshoot on 200-mV steps |
| Extended temperature rating | Specified over –40°C to +125°C with guaranteed 2.8 mV max input offset and 75 dB min CMRR at full range |
Applications
| Wideband Photodiode Transimpedance Amplifier | High-Z Front-End Sensor Interface |
|---|---|
|
Use Scenario: Converting nanoamp-level photocurrent from high-speed photodiodes into low-noise voltage signals for optical time-domain reflectometry. IC Role / Device Role / Timing Role: Primary transimpedance amplifier with 6 nV/√Hz noise floor and 105 MHz bandwidth enabling sub-nanosecond pulse response. Use Value: Enables >10 MHz signal bandwidth while maintaining SNR >70 dB for 100-kΩ feedback resistors, reducing need for post-amplification stages. |
Use Scenario: Conditioning signals from MEMS accelerometers, piezoresistive pressure sensors, or pH electrodes with source impedances >1 MΩ. IC Role / Device Role / Timing Role: High-impedance buffer and level shifter before ADC sampling, preserving signal fidelity with 2 pA input bias current. Use Value: Eliminates bias-current-induced offset errors in high-gain configurations, improving DC accuracy by up to 10× versus bipolar-input op-amps. |
| Power Analyzer Signal Chain | Multichannel Data Acquisition System |
|
Use Scenario: Isolating and scaling voltage/current waveforms in three-phase energy meters with harmonic analysis up to 50th order. IC Role / Device Role / Timing Role: Precision gain stage preceding anti-aliasing filters and 16-bit SAR ADCs, operating at ±12 V rails. Use Value: Delivers 70 dBc HD3 at 1 MHz (RL = 1 kΩ, 2 VPP), ensuring clean spectral representation for FFT-based power quality analysis. |
Use Scenario: Simultaneous analog conditioning of 8+ sensor channels in portable test equipment with shared clock and trigger domains. IC Role / Device Role / Timing Role: Dual-channel matched amplifier providing synchronized signal paths with ≤3% GBWP mismatch and –93 dBc crosstalk. Use Value: Reduces inter-channel skew and amplitude mismatch, enabling coherent multi-channel sampling without calibration overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed FET-input operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA810IDCKT | Single-channel variant in SC70-5 package; identical GBWP (70 MHz), slightly higher slew rate (200 V/µs), and same 6.3 nV/√Hz noise. | Used where board space permits discrete channel placement or where channel count flexibility is needed per design revision. | Select OPA810IDCKT when only one amplifier is required and SC70 footprint is preferred; not pin-compatible with OPA2810IDCNT. |
| THS4631D | Higher GBWP (210 MHz) but higher quiescent current (13 mA/channel); input bias current 20 pA (10× higher); 7 nV/√Hz noise. | Preferred in ultra-wideband RF IF stages where speed outweighs power and DC precision constraints. | Choose THS4631D only when >100 MHz bandwidth is mandatory and 20 pA input bias is acceptable; requires layout rework due to different pinout and SOIC-8 packaging. |
Compared with OPA810IDCKT and THS4631D, the OPA2810IDCNT uniquely balances dual-channel integration, ultra-low input bias (2 pA), and 70 MHz bandwidth at 3.6 mA/channel-making it optimal for space- and power-constrained multichannel precision systems where channel matching and DC accuracy are critical.
Availability
OPA2810IDCNT is available at Aetrix Electronics and suitable for wideband photodiode transimpedance amplifiers, high-Z front-end sensor interfaces, and multichannel data acquisition systems requiring stable component supply across industrial temperature ranges.
Supply support for OPA2810IDCNT 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 company specializing in analog and embedded processing technologies, with leadership in high-performance op-amps, data converters, and power management ICs.
The OPA2810IDCNT belongs to TI's precision high-speed op-amp product line, designed specifically for demanding signal-chain applications including photodiode TIA, impedance measurement, and multichannel sensor conditioning where low noise, low bias current, and rail-to-rail operation are essential.
FAQ
What is the maximum supply voltage for OPA2810IDCNT?
The OPA2810IDCNT supports a total supply voltage range of 4.75 V to 27 V, meaning it can operate on single supplies (e.g., 5 V or 24 V) or split supplies (e.g., ±12 V). Absolute maximum ratings specify ±14 V total supply (VS+ – VS–), so applying ±13.5 V is within safe operating limits. Exceeding ±14 V risks permanent damage per the absolute maximum ratings table in the SBOS789C datasheet.
Does OPA2810IDCNT support rail-to-rail input with a 5-V single supply?
Yes, the OPA2810IDCNT supports rail-to-rail input with a 5-V single supply (VS+ = 5 V, VS– = 0 V). Its input common-mode range extends from VS– – 0.2 V to VS+ + 0.3 V, allowing valid operation down to –0.2 V and up to +5.3 V. This enables direct interfacing with sensors whose output swings near ground or above VCC, confirmed in Section 7.7 (Electrical Characteristics: 5 V) of the datasheet.
What is the typical input bias current of OPA2810IDCNT at 125°C?
The typical input bias current of OPA2810IDCNT at 125°C is 100 pA, with a maximum specification of 460 pA under those conditions. This value is documented in the "Input bias current" row of Section 7.6 (Electrical Characteristics: 24 V) for TA = –40°C to +125°C, confirming its suitability for high-temperature high-Z applications where leakage must remain sub-nanoamp.
Can OPA2810IDCNT drive a 50-Ω load directly?
No, the OPA2810IDCNT is not designed to drive a 50-Ω load continuously. Its linear output drive is specified at 75 mA into 667 Ω (yielding ~50 mV drop), and short-circuit current is limited to 108 mA. Driving 50 Ω would require >100 mA sustained current at typical output voltages, exceeding safe operating area limits and risking thermal shutdown or parametric shift. Use an external buffer or line driver stage for 50-Ω termination.
Is OPA2810IDCNT pin-compatible with other dual op-amps in SOT-23-8?
No, OPA2810IDCNT uses a non-standard pinout for dual op-amps in SOT-23-8: VO1, VIN1–, VIN1+, VS–, VIN2+, VIN2–, VO2, VS+. This differs from industry conventions (e.g., LMV358, TLV2462), which typically place VS+ and VS– at pins 8 and 4. Layout reuse is not possible without redesign; always verify against the Pin Configuration diagram (Figure 1) in SBOS789C.
OPA2810IDCNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 243V/µs
- Gain Bandwidth Product:
- 70 MHz
- -3db Bandwidth:
- 105 MHz
- Current - Input Bias:
- 2 pA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 3.7mA (x2 Channels)
- Current - Output / Channel:
- 108 mA
- Voltage - Supply Span (Min):
- 4.75 V
- Voltage - Supply Span (Max):
- 27 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
OPA2810IDCNT FAQ
1.How can I place an order for OPA2810IDCNT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2810IDCNT 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 OPA2810IDCNT reliable?
The price and inventory of OPA2810IDCNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2810IDCNT is usually 5 days.
3.What payment methods are accepted for OPA2810IDCNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2810IDCNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2810IDCNT?
OPA2810IDCNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2810IDCNT 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 OPA2810IDCNT?
For technical support, including OPA2810IDCNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2810IDCNT requirements.
6.How does Aetrix verify that OPA2810IDCNT is sourced from the original manufacturer or authorized distributors?
All OPA2810IDCNT 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 OPA2810IDCNT meets industry standards.
7.What is the process for return or replacement of OPA2810IDCNT?
All OPA2810IDCNT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2810IDCNT, 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 OPA2810IDCNT part is unused and in its original packaging.
Return procedure for OPA2810IDCNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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