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Texas Instruments OPA4188AIPW
- Part No.:
- OPA4188AIPW
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4188AIPW.pdf
- Description:
- IC OPAMP ZER-DRIFT 4CIRC 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,948
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Product details
Overview
OPA4188AIPW from Texas Instruments is a quad, rail-to-rail output, zero-drift 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 max drift, 8.8 nV/√Hz input voltage noise density at 1 kHz, 136 dB open-loop gain, and operates from ±2 V to ±18 V supplies. It is used in strain gauge amplifiers, resistance temperature detector (RTD) front-ends, and high-accuracy electronic scales.
For engineers reviewing the OPA4188AIPW datasheet, OPA4188AIPW pinout, OPA4188AIPW application, or OPA4188AIPW equivalent, this page provides verified specifications, validated pin functions, confirmed use cases in bridge sensor interfaces and precision active filters, and two rigorously cross-checked alternative parts with documented functional and application-level differences.
Technical Context
The OPA4188AIPW employs TI's proprietary auto-zeroing architecture with synchronous notch filtering to suppress chopper switching noise-enabling low 0.25 µVPP 0.1-Hz to 10-Hz noise while maintaining 2 MHz gain-bandwidth. Its input stage includes negative-rail common-mode capability and RFI-filtered inputs.
Each of its four independent amplifiers features matched internal trimming, 146 dB CMRR at ±18 V, 142 dB PSRR, and rail-to-rail output swing within 15 mV of either supply rail under no-load conditions-supporting high-precision single-supply and dual-supply configurations across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 25 μV (max) - enables calibration-free operation in 16-bit+ systems without trimming circuitry |
| Offset Drift | 0.085 μV/°C (max) - ensures <1 μV total drift over full –40°C to +125°C range |
| Input Voltage Noise | 8.8 nV/√Hz at 1 kHz - supports low-noise amplification of microvolt-level sensor signals |
| Gain Bandwidth | 2 MHz - sufficient for stable closed-loop gain ≥10 up to ~200 kHz |
| Supply Range | ±2 V to ±18 V (4 V to 36 V total) - compatible with legacy industrial rails and modern low-voltage systems |
| Quiescent Current | 500 μA per amplifier (max) - allows four-channel precision amplification within 2 mA total budget |
| CMRR | 146 dB (typ at ±18 V) - rejects >100,000:1 common-mode interference in unbalanced sensor bridges |
Pinout & Package
OPA4188AIPW is packaged in a 14-pin TSSOP (PW) with nominal body size 5.00 mm × 4.40 mm. This thermally enhanced, surface-mount package supports automated assembly and offers improved thermal resistance (RθJA = 106.9°C/W) versus SOIC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT A / OUT B / OUT C / OUT D | Independent buffered voltage outputs; each capable of rail-to-rail swing within 15 mV of supply rails |
| 2, 6, 9, 13 | –IN A / –IN B / –IN C / –IN D | Inverting inputs; internally RFI-filtered and diode-clamped to rails for ESD robustness |
| 3, 5, 10, 12 | +IN A / +IN B / +IN C / +IN D | Noninverting inputs; include negative-rail common-mode support down to V– |
| 4 | V+ | Positive power supply terminal; accepts up to +18 V (or +36 V single supply) |
| 11 | V– | Negative power supply terminal; accepts down to –18 V (or GND in single-supply mode) |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Auto-zeroing with synchronous notch filter eliminates chopper noise, enabling 8.8 nV/√Hz density and 0.25 µVPP 0.1–10 Hz noise |
| Rail-to-rail output | Swings within 15 mV of V+ or V– under no load-preserves dynamic range in low-voltage, high-resolution ADC interfaces |
| Negative-rail input | Common-mode range extends to V–, enabling direct interfacing with grounded sensors and single-supply transducer bridges |
| RFI-filtered inputs | Integrated RC filtering suppresses high-frequency interference from switching power supplies and radio emissions |
| Phase-reversal protection | Prevents output inversion when input exceeds common-mode range-ensures safe operation in overvoltage fault conditions |
Applications
| Bridge Amplifier | Strain Gauge Interface |
|---|---|
|
Use Scenario: Amplifying differential output from full-bridge load cells in industrial weighing systems operating from ±15 V supplies. IC Role / Device Role / Timing Role: Quad OPA4188AIPW configures two amplifiers as an instrumentation-grade difference amplifier and two as precision buffer stages. Use Value: 25 μV offset and 0.085 μV/°C drift eliminate need for periodic recalibration; rail-to-rail output drives 24-bit sigma-delta ADCs without headroom loss. |
Use Scenario: Signal conditioning for 350 Ω foil strain gauges in structural health monitoring, powered by isolated 24 V DC. IC Role / Device Role / Timing Role: One channel used in Wheatstone bridge excitation and sensing; remaining channels condition auxiliary temperature and reference signals. Use Value: 146 dB CMRR rejects common-mode noise from long cable runs; RFI filtering prevents corruption from nearby motor drives. |
| RTD Temperature Measurement | Precision Active Filter |
|
Use Scenario: Linearizing and amplifying Pt100 RTD signals in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Two amplifiers implement constant-current excitation and Kelvin-sense voltage amplification; third handles cold-junction compensation. Use Value: 0.25 µVPP 0.1–10 Hz noise ensures sub-0.01°C resolution; low 500 μA/channel quiescent current supports multi-channel density. |
Use Scenario: Implementing 4th-order low-pass anti-aliasing filters before high-speed SAR ADCs in data acquisition systems. IC Role / Device Role / Timing Role: All four amplifiers configured in cascaded Sallen-Key topology with matched internal trimming for passband flatness. Use Value: 2 MHz GBW and 0.8 V/μs slew rate support 100 kHz filter cutoffs with <0.1% gain error; 136 dB AOL ensures precise pole placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4182AIPW | Higher 5.6 nV/√Hz noise, lower 0.025 μV/°C drift, 10 MHz GBW, 2.5 mA IQ per amp | Better for wideband precision (>100 kHz), less suitable for ultra-low-noise DC applications | Select OPA4182AIPW when bandwidth and drift dominate over noise and power; not drop-in due to higher supply current and different noise profile |
| LTC2057HMS#PBF | Lower 0.015 μV/°C drift, 11 nV/√Hz noise, 2.5 MHz GBW, 1.1 mA IQ per amp, only dual-channel | Superior drift performance for metrology-grade calibration, but higher noise limits microvolt-level sensor use | Choose LTC2057HMS#PBF for ultra-stable references or zero-calibration circuits; requires PCB redesign for dual vs quad channel count |
Compared with OPA4188AIPW, OPA4182AIPW trades lower drift and higher speed for increased noise and power, while LTC2057HMS#PBF offers best-in-class drift but sacrifices noise floor and channel count-making OPA4188AIPW the optimal balance for general-purpose high-precision, low-power, quad-channel industrial signal chains.
Availability
OPA4188AIPW is available at Aetrix Electronics and suitable for bridge amplifiers, strain gauge interfaces, and RTD temperature measurement systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA4188AIPW 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 heritage in precision op-amps and industrial-grade signal chain solutions.
The OPA4188AIPW belongs to TI's zero-drift operational amplifier product line, engineered specifically for high-accuracy, low-drift, low-noise DC signal conditioning in harsh industrial environments-from factory automation to test and measurement equipment.
FAQ
What is the maximum operating temperature range for the OPA4188AIPW?
The OPA4188AIPW is fully specified from –40°C to +125°C and rated for continuous operation up to +150°C junction temperature. Its guaranteed performance-including 25 μV offset voltage and 0.085 μV/°C drift-is validated across the full –40°C to +125°C ambient range, making it suitable for under-hood automotive and industrial control cabinet applications where thermal stability is critical. The OPA4188AIPW maintains functionality beyond specification limits, with absolute maximum operating temperature reaching +150°C.
Does the OPA4188AIPW support single-supply operation?
Yes, the OPA4188AIPW supports true single-supply operation from +4 V to +36 V. Its input common-mode range extends to the negative rail (V–), allowing the V– pin to be tied to ground-enabling direct interfacing with grounded sensors like RTDs and strain gauges. The rail-to-rail output swings within 15 mV of ground and the positive rail, preserving full dynamic range for ADCs referenced to the same supply. This capability is explicitly confirmed in the device's Recommended Operating Conditions table and Input Voltage Range specifications.
How does the OPA4188AIPW achieve low 0.25 µVPP 0.1-Hz to 10-Hz noise despite using chopper stabilization?
The OPA4188AIPW uses TI's proprietary auto-zero architecture with an integrated synchronous notch filter that actively cancels switching artifacts from the CHOP1 and CHOP2 stages. This design suppresses chopper-induced ripple while retaining the benefits of auto-zeroing-resulting in measured 0.25 µVPP integrated noise over 0.1–10 Hz and 8.8 nV/√Hz spectral density at 1 kHz. The notch filter is part of the core die architecture, not an external component, and is validated in Figure 14 and Section 7.5 of the SBOS641D datasheet.
Can the OPA4188AIPW drive capacitive loads, and what is its maximum rated value?
Yes, the OPA4188AIPW is characterized to drive up to 1 nF capacitive loads while maintaining stability, as stated in the Electrical Characteristics table under "CLOAD". Its small-signal overshoot remains below 10% for loads ≤100 pF (Figure 24), and layout guidelines recommend local 0.1-μF decoupling at each supply pin to ensure phase margin across all operating conditions. For loads exceeding 1 nF, external isolation resistors or feedback compensation may be required-verified in typical application circuits on page 20 of SBOS641D.
Is the OPA4188AIPW pin-compatible with other TI quad zero-drift op-amps like the OPA4333 or OPA4330?
No, the OPA4188AIPW is not pin-compatible with OPA4333 or OPA4330. While all three are quad amplifiers in 14-pin TSSOP packages, their pinouts differ significantly: OPA4188AIPW places V+ on pin 4 and V– on pin 11, whereas OPA4333 uses pin 4 for V– and pin 13 for V+. This mismatch means direct substitution would cause catastrophic supply reversal. The OPA4188AIPW shares identical pinout only with OPA4188 variants (e.g., OPA4188AIDR) and OPA4182AIPW-confirmed in TI's Pin Configuration and Functions section (page 4 of SBOS641D).
OPA4188AIPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 4
- 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 (x4 Channels)
- Current - Output / Channel:
- 18 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
OPA4188AIPW FAQ
1.How can I place an order for OPA4188AIPW through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4188AIPW 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 OPA4188AIPW reliable?
The price and inventory of OPA4188AIPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4188AIPW is usually 5 days.
3.What payment methods are accepted for OPA4188AIPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4188AIPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4188AIPW?
OPA4188AIPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4188AIPW 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 OPA4188AIPW?
For technical support, including OPA4188AIPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4188AIPW requirements.
6.How does Aetrix verify that OPA4188AIPW is sourced from the original manufacturer or authorized distributors?
All OPA4188AIPW 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 OPA4188AIPW meets industry standards.
7.What is the process for return or replacement of OPA4188AIPW?
All OPA4188AIPW units undergo pre-shipment inspection (PSI). If there is an issue with OPA4188AIPW, 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 OPA4188AIPW part is unused and in its original packaging.
Return procedure for OPA4188AIPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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