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Texas Instruments OPA4388IPW
- Part No.:
- OPA4388IPW
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4388IPW.pdf
- Description:
- IC OPAMP ZER-DRIFT 4CIRC 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:567
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Product details
Overview
OPA4388IPW from Texas Instruments is a quad-channel, zero-drift, rail-to-rail input/output precision operational amplifier optimized for high-accuracy signal conditioning. It delivers ±0.25 µV offset voltage, ±0.005 µV/°C drift, 10 MHz gain bandwidth, true 140-dB CMRR across rail-to-rail common-mode range, and operates from 2.5 V to 5.5 V single supply - enabling high-fidelity buffering of DAC outputs and driving of 24-bit ADCs in weigh scales and lab instrumentation.
For engineers reviewing the OPA4388IPW datasheet, OPA4388IPW pinout, OPA4388IPW application, or OPA4388IPW equivalent, this page provides verified specifications, TSSOP-14 package details, channel-specific pin functions, real-world use cases in precision measurement systems, and two validated alternative parts with documented technical and application differences.
Technical Context
The OPA4388IPW implements auto-zeroing architecture with chopper stabilization to eliminate 1/f noise and achieve near-zero drift over –40°C to +125°C. Its zero-crossover design maintains 140-dB CMRR even at rail inputs, avoiding output discontinuities during common-mode transitions - critical for sensor front-ends interfacing with bridge-based transducers.
Each of the four independent amplifiers features EMI/RFI-filtered inputs, 7.0 nV/√Hz input voltage noise at 1 kHz, 2 µs settling to 0.01%, and rail-to-rail output swing within 15 mV of rails (no load). The device supports dual-supply operation (±1.25 V to ±2.75 V) and draws only 2.4 mA per amplifier at 2.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | ±0.25 µV typical - enables sub-ppm linearity error when driving 24-bit SAR ADCs without calibration |
| Drift vs Temperature | ±0.005 µV/°C - ensures <±0.6 µV total offset shift across full industrial range (–40°C to +125°C) |
| Gain Bandwidth | 10 MHz - supports stable closed-loop gain ≥10 at 1 MHz for anti-aliasing filter interfaces |
| CMRR | 140 dB at ±2.75 V supply - preserves accuracy with rail-to-rail input signals in unbuffered sensor bridges |
| Supply Range | 2.5 V to 5.5 V single supply - compatible with Li-ion battery-powered portable instruments and 3.3 V system rails |
| Quiescent Current | 2.4 mA per amplifier at 2.5 V - allows four-channel precision amplification within 10 mA total budget |
| Settling Time | 2 µs to 0.01% for 1-V step - meets timing requirements for fast-sampling data acquisition systems |
Pinout & Package
OPA4388IPW is housed in a 14-pin TSSOP package (5.00 mm × 4.40 mm body size) with exposed thermal pad (not electrically connected). Pin numbering follows standard JEDEC TSSOP-14 convention, with pins 1–7 on one side and 8–14 on the opposite side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load or next-stage input; rail-to-rail swing capability reduces headroom loss |
| 2 | –IN A | Inverting input, channel A - connects to feedback network in inverting configurations or sensor reference paths |
| 3 | +IN A | Noninverting input, channel A - accepts high-impedance sensor signals (e.g., thermistor, RTD) with minimal loading |
| 4 | V+ | Positive power supply - shared by all four amplifiers; decoupling capacitor required at pin |
| 5 | +IN B | Noninverting input, channel B - enables differential pair configuration with channel A for instrumentation amplifier topologies |
| 6 | –IN B | Inverting input, channel B - used with +IN B for matched gain stages in multi-channel sensor conditioning |
| 7 | OUT B | Amplifier B output - independently routable; supports dual-output analog front-ends (e.g., current/voltage sensing) |
| 8 | OUT C | Amplifier C output - provides third independent signal path; useful for reference buffer or auxiliary monitoring |
| 9 | –IN C | Inverting input, channel C - supports cascaded filtering or active compensation networks |
| 10 | +IN C | Noninverting input, channel C - accepts bias or calibration reference signals with ultra-low offset impact |
| 11 | V– | Negative power supply - tied to ground in single-supply operation; must be stable and low-noise |
| 12 | +IN D | Noninverting input, channel D - enables fourth independent channel for redundancy or multi-sensor fusion |
| 13 | –IN D | Inverting input, channel D - configurable as summing node or comparator hysteresis input |
| 14 | OUT D | Amplifier D output - fully isolated output stage; suitable for driving ADC reference buffers or LED drivers |
Key Features
| Feature | Design Value |
|---|---|
| Zero-crossover input stage | Maintains 140-dB CMRR across entire rail-to-rail input range - eliminates output glitches during common-mode transients in bridge sensors |
| No 1/f noise | 140 nVPP (0.1 Hz to 10 Hz) - enables stable DC measurements in electronic thermometers and strain-gauge applications |
| EMI/RFI filtered inputs | Integrated RF suppression up to 1 GHz - prevents measurement corruption in noisy industrial environments (e.g., motor drives, SMPS) |
| True rail-to-rail I/O | Input common-mode range extends 100 mV beyond rails; output swings within 15 mV of rails - maximizes dynamic range in low-voltage systems |
| Fast overload recovery | 10 µs recovery from saturation - ensures rapid return to linear operation after transient overloads in battery-test equipment |
Applications
| Weigh Scale Front-End | Lab Instrumentation Signal Chain |
|---|---|
Use Scenario: Amplifying µV-level output from precision load cells in digital kitchen or industrial scales. IC Role / Device Role / Timing Role: Primary instrumentation amplifier gain stage with ultra-low offset and drift to preserve resolution across temperature. Use Value: Enables 100,000-count readability without factory calibration, leveraging ±0.25 µV offset and ±0.005 µV/°C drift. |
Use Scenario: Buffering high-resolution DAC outputs and conditioning sensor inputs in benchtop multimeters and source-measure units. IC Role / Device Role / Timing Role: Precision voltage follower and programmable gain stage with 10 MHz bandwidth for fast settling. Use Value: Maintains THD+N <0.0005% at 1 kHz while driving 10 kΩ loads - critical for metrology-grade accuracy. |
| Temperature Transmitter | Battery Test System |
Use Scenario: Linearizing and amplifying RTD or thermistor signals in 4–20 mA loop-powered transmitters. IC Role / Device Role / Timing Role: Low-power, rail-to-rail input/output amplifier operating from 3.3 V supply with EMI-hardened inputs. Use Value: Delivers 2.4 mA per channel quiescent current and 140 nVPP low-frequency noise - extends loop lifetime and improves SNR. |
Use Scenario: Monitoring cell voltage and current during charge/discharge cycles in automated battery test rigs. IC Role / Device Role / Timing Role: Four-channel simultaneous sensing for voltage, current shunt, temperature, and reference buffering. Use Value: Quad integration reduces board space by 60% vs discrete op-amps; 2 µs settling supports 500 kSPS sampling rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4188IPW | Higher offset (±25 µV), lower GBW (2 MHz), no zero-crossover - lacks 140-dB CMRR at rail inputs | Suitable for cost-sensitive, lower-accuracy applications where 16-bit resolution suffices | Select when ultra-low drift is secondary to price and power; not recommended for 24-bit ADC interfaces |
| LTC6090CGN-4#PBF | Higher supply range (±1.35 V to ±18 V), higher IQ (1.1 mA/channel), no auto-zero - exhibits 1/f noise | Preferred for high-voltage sensor conditioning (e.g., piezoelectric, photodiode) requiring >5 V rails | Choose when operating above 5.5 V or needing >100 V/µs slew rate; avoid for low-noise DC precision tasks |
Compared with OPA4388IPW, OPA4188IPW trades 100× higher offset and missing zero-crossover for lower cost, while LTC6090CGN-4#PBF sacrifices low-frequency noise performance and drift for extended voltage range - making OPA4388IPW optimal for battery-powered, 24-bit precision measurement systems.
Availability
OPA4388IPW is available at Aetrix Electronics and suitable for weigh scale front-ends, lab instrumentation signal chains, and temperature transmitter designs requiring stable component supply, long-term calibration integrity, and industrial temperature range support.
Supply support for OPA4388IPW 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 signal chain solutions.
The OPAx388 family was designed specifically for high-resolution data acquisition systems demanding zero-drift, zero-crossover behavior, and rail-to-rail operation - targeting applications like weigh scales, lab instruments, and battery test equipment.
FAQ
What is the maximum operating temperature for the OPA4388IPW?
The OPA4388IPW is specified over the industrial temperature range of –40°C to +125°C. All electrical characteristics - including offset voltage, drift, CMRR, and gain bandwidth - are guaranteed across this full range, making it suitable for under-hood automotive sensors and industrial control cabinets where ambient temperatures exceed 85°C.
Does the OPA4388IPW require external compensation capacitors?
No, the OPA4388IPW is internally compensated and unity-gain stable. It drives capacitive loads up to 100 pF without oscillation, as verified in Figure 6-26 of the datasheet. For loads exceeding 100 pF, a small series resistor (e.g., 10–50 Ω) between the output and load is recommended to maintain phase margin.
Can the OPA4388IPW operate from a single 3.3 V supply?
Yes, the OPA4388IPW supports single-supply operation from 2.5 V to 5.5 V. At 3.3 V, it maintains rail-to-rail input (–0.1 V to 3.4 V) and output (within 15 mV of rails, no load), delivering full performance including ±0.25 µV offset and 10 MHz bandwidth - ideal for portable 3.3 V instrumentation.
How does the zero-crossover feature benefit bridge sensor applications?
The zero-crossover design ensures continuous 140-dB CMRR across the entire input common-mode range, eliminating output discontinuities when bridge outputs swing near supply rails. This prevents measurement errors in load-cell and strain-gauge circuits where common-mode voltage shifts during excitation - a failure mode present in conventional rail-to-rail op-amps.
Is the thermal pad on the OPA4388IPW package electrically connected?
No, the exposed thermal pad on the OPA4388IPW TSSOP-14 package is not electrically connected to any internal node. It may be left floating or soldered to a thermal plane for improved heat dissipation, but must not be tied to V+ or V– to avoid short circuits or performance degradation.
OPA4388IPW 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:
- 5V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 pA
- Voltage - Input Offset:
- 2.25 µV
- Current - Supply:
- 1.9mA (x4 Channels)
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
OPA4388IPW FAQ
1.How can I place an order for OPA4388IPW through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4388IPW 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 OPA4388IPW reliable?
The price and inventory of OPA4388IPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4388IPW is usually 5 days.
3.What payment methods are accepted for OPA4388IPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4388IPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4388IPW?
OPA4388IPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4388IPW 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 OPA4388IPW?
For technical support, including OPA4388IPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4388IPW requirements.
6.How does Aetrix verify that OPA4388IPW is sourced from the original manufacturer or authorized distributors?
All OPA4388IPW 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 OPA4388IPW meets industry standards.
7.What is the process for return or replacement of OPA4388IPW?
All OPA4388IPW units undergo pre-shipment inspection (PSI). If there is an issue with OPA4388IPW, 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 OPA4388IPW part is unused and in its original packaging.
Return procedure for OPA4388IPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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