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Texas Instruments OPA2188AID
- Part No.:
- OPA2188AID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2188AID.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:598
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Product details
Overview
OPA2188AID from Texas Instruments is a dual, zero-drift, rail-to-rail output operational amplifier optimized for precision DC-coupled signal conditioning in industrial and test equipment. It delivers 25 μV maximum input offset voltage, 0.085 μV/°C drift, 8.8 nV/√Hz input voltage noise, 146 dB CMRR, and 2 MHz gain bandwidth - enabling high-accuracy bridge sensor amplification and strain gauge readout at ±18 V supply.
For engineers reviewing the OPA2188AID datasheet, OPA2188AID pinout, OPA2188AID application, or OPA2188AID equivalent, this page provides verified specifications, SOIC-8 package details, real-world use cases in transducer interfaces and medical instrumentation, and validated alternative options for low-drift dual op-amp selection.
Technical Context
The OPA2188AID employs TI's proprietary auto-zeroing architecture with chopper-stabilized front-end and notch-filtered correction path to achieve near-zero drift and low 1/f noise. Its dual-channel design shares no internal coupling beyond substrate, supporting independent high-precision channels with >120 dB channel separation up to 100 kHz.
It operates from ±2 V to ±18 V (4–36 V total), features rail-to-rail output swing within 15 mV of rails, includes negative-rail input common-mode range, and integrates RFI filtering on both inputs - making it suitable for noisy industrial environments without external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 25 μV max - ensures ≤0.0025% error in 1-V full-scale 16-bit systems without calibration |
| Offset Drift | 0.085 μV/°C max - guarantees <1 μV total drift over –40°C to +105°C operating range |
| CMRR | 146 dB (typ) - rejects >5.5 million:1 common-mode interference in differential sensor interfaces |
| Gain Bandwidth | 2 MHz - supports stable unity-gain operation with ≥45° phase margin into 10-kΩ//100-pF loads |
| Quiescent Current | 475 μA per amplifier max - enables dual-channel precision amplification in battery-powered portable instruments |
| Supply Range | ±2 V to ±18 V - compatible with legacy ±15 V industrial rails and modern low-voltage 5 V/3.3 V systems |
| Output Swing | Rail-to-rail, within 15 mV of rails (no load) - maximizes dynamic range in single-supply data acquisition |
Pinout & Package
OPA2188AID is housed in an 8-pin SOIC (SOIC-8) package measuring 4.90 mm × 3.91 mm, with standard JEDEC MS-012AC footprint and 1.27 mm lead pitch. Thermal resistance RθJA is 111°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive power supply | Highest potential rail; must be decoupled with 0.1-μF ceramic capacitor placed ≤2 mm from pin |
| OUT A | Amplifier A output | Capable of sourcing/sinking ±18 mA; rail-to-rail swing supports full-scale ADC interfacing |
| –IN A | Inverting input, Channel A | High-impedance node (10¹² Ω); sensitive to PCB leakage - requires guard ring in high-Z applications |
| +IN A | Noninverting input, Channel A | Includes negative rail; enables single-supply operation with ground-referenced sensors |
| V– | Negative power supply | Lowest potential rail; shared reference for both amplifiers; must be low-impedance |
| +IN B | Noninverting input, Channel B | Independent of Channel A; supports dual-sensor simultaneous sampling without crosstalk |
| –IN B | Inverting input, Channel B | Matched bias current (<±850 pA) to Channel A - critical for matched differential gain stages |
| OUT B | Amplifier B output | Electrically isolated from OUT A; channel separation >120 dB up to 100 kHz |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Auto-zeroing with chopper stabilization eliminates thermal drift and 1/f noise - maintains accuracy over time and temperature without recalibration |
| Rail-to-rail output | Swings within 15 mV of supply rails under no load - preserves >99% of available voltage headroom for maximum SNR |
| RFI-filtered inputs | Integrated EMI rejection filters suppress wireless interference (e.g., GSM, Wi-Fi) without external RC networks |
| High PSRR/CMRR | 142 dB PSRR and 146 dB CMRR - rejects power supply ripple and common-mode noise in unshielded industrial enclosures |
| Low quiescent current | 475 μA per amplifier - enables dual-channel precision amplification in portable, battery-operated test gear |
Applications
| Bridge Amplifier | Strain Gauge Interface |
|---|---|
|
Use Scenario: Amplifying low-level differential signals from Wheatstone bridges in load cells and pressure transducers. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front-end, with one channel for signal path and second for reference or compensation. Use Value: 0.085 μV/°C drift ensures <0.5 μV total offset shift across –40°C to +85°C ambient - eliminating thermal zero-error in field-deployed sensors. |
Use Scenario: Conditioning millivolt-level outputs from metallic foil or semiconductor strain gauges in structural health monitoring. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with matched input bias currents (<±850 pA) minimizing gauge excitation errors. Use Value: 25 μV max offset enables direct 16-bit ADC digitization of 10-mV full-scale signals without software nulling or hardware trimming. |
| Electronic Scale Front-End | Medical Instrumentation Signal Chain |
|
Use Scenario: High-resolution weight measurement in commercial and industrial scales using microvolt-level bridge outputs. IC Role / Device Role / Timing Role: First-stage gain block before Σ-Δ ADC, providing stable DC gain with minimal long-term drift. Use Value: 0.25 µVPP 0.1-Hz to 10-Hz noise floor ensures <1-µV RMS noise contribution - critical for sub-gram resolution at 10-Hz update rates. |
Use Scenario: Biopotential signal conditioning in ECG, EEG, and patient monitors requiring ultra-low drift and high CMRR. IC Role / Device Role / Timing Role: Input buffer and differential amplifier in isolated front-end, rejecting 50/60 Hz mains interference. Use Value: 146 dB CMRR and RFI filtering suppress line-frequency pickup and digital switching noise - meeting IEC 60601-2-27 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Lower supply range (1.8–5.5 V), higher offset drift (0.05 μV/°C), lower bandwidth (350 kHz) | Battery-powered portable devices only; unsuitable for ±15 V industrial rails or >100-kHz signal bandwidths | Select when ultra-low power (<17 μA) and single-supply 3.3 V operation are mandatory; not drop-in for OPA2188AID |
| LTC2053CMS8#PBF | Higher quiescent current (1.1 mA), wider offset spec (25 μV max same), identical 0.05 μV/°C drift, SO-8 package | Requires higher supply current; better performance in high-frequency noise environments due to different chopping architecture | Choose for enhanced EMI immunity in RF-dense medical or communications equipment; pin-compatible but higher IQ |
Compared with OPA2188AID, OPA2333AIDR trades wide supply range and bandwidth for ultra-low power, while LTC2053CMS8#PBF offers comparable precision with higher supply current and superior RF rejection - making each suitable for distinct subsystem constraints rather than direct substitution.
Availability
OPA2188AID is available at Aetrix Electronics and suitable for bridge amplifiers, strain gauge interfaces, and electronic scale front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2188AID 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 innovation in precision amplifiers and signal chain solutions.
The OPA2188AID belongs to TI's zero-drift operational amplifier product line, engineered specifically for high-accuracy, low-drift DC signal conditioning in industrial automation, test and measurement, and medical instrumentation.
FAQ
What is the maximum operating temperature range for the OPA2188AID?
The OPA2188AID is specified for continuous operation from –40°C to +105°C, with absolute maximum junction temperature rated at 150°C. Its guaranteed performance parameters - including 25 μV max offset voltage and 0.085 μV/°C drift - are valid across this full industrial temperature range, making OPA2188AID suitable for deployment in harsh environments such as factory floors and outdoor instrumentation.
Does the OPA2188AID support single-supply operation?
Yes, the OPA2188AID supports true single-supply operation from 4 V to 36 V total supply range. Its input common-mode range extends to the negative rail (V–), and its rail-to-rail output swings within 15 mV of both supply rails under no load. This allows OPA2188AID to interface directly with ground-referenced sensors and low-voltage ADCs without level-shifting circuitry.
What package types are available for the OPA2188AID?
The OPA2188AID is offered exclusively in the 8-pin SOIC (SOIC-8) package with body dimensions of 4.90 mm × 3.91 mm and standard JEDEC MS-012AC footprint. It is not available in VSSOP or other miniaturized packages - the "AID" suffix explicitly denotes the SOIC-8 variant per TI's orderable addendum.
How does the OPA2188AID handle electromagnetic interference (EMI)?
The OPA2188AID integrates on-chip RFI filtering on both inputs, providing measured EMIRR (Electromagnetic Interference Rejection Ratio) >100 dB at 900 MHz and >80 dB at 1.8 GHz. This built-in filtering significantly reduces sensitivity to cellular, Wi-Fi, and Bluetooth emissions - eliminating the need for external RC filters in most industrial and medical PCB layouts where OPA2188AID is deployed.
Can the OPA2188AID drive capacitive loads without instability?
The OPA2188AID is characterized to drive up to 1 nF capacitive loads stably in unity-gain configuration. For loads exceeding 100 pF, TI recommends adding a small series resistor (typically 10–50 Ω) between the output and capacitive node to isolate the amplifier's output impedance from the load capacitance - a practice confirmed effective in OPA2188AID reference designs for driving SAR and Σ-Δ ADC inputs.
OPA2188AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.8V/µs
- Gain Bandwidth Product:
- 2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 160 pA
- Voltage - Input Offset:
- 6 µV
- Current - Supply:
- 415µA (x2 Channels)
- Current - Output / Channel:
- 18 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA2188AID FAQ
1.How can I place an order for OPA2188AID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2188AID 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 OPA2188AID reliable?
The price and inventory of OPA2188AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2188AID is usually 5 days.
3.What payment methods are accepted for OPA2188AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2188AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2188AID?
OPA2188AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2188AID 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 OPA2188AID?
For technical support, including OPA2188AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2188AID requirements.
6.How does Aetrix verify that OPA2188AID is sourced from the original manufacturer or authorized distributors?
All OPA2188AID 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 OPA2188AID meets industry standards.
7.What is the process for return or replacement of OPA2188AID?
All OPA2188AID units undergo pre-shipment inspection (PSI). If there is an issue with OPA2188AID, 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 OPA2188AID part is unused and in its original packaging.
Return procedure for OPA2188AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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