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Texas Instruments OPA4388ID
- Part No.:
- OPA4388ID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4388ID.pdf
- Description:
- IC OPAMP ZERO-DRIFT 4CIRC 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:396
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Product details
Overview
OPA4388ID from Texas Instruments is a quad-channel, zero-drift, rail-to-rail input/output precision operational amplifier optimized for high-accuracy signal conditioning in DC-critical applications. It delivers ±0.25 µV typical offset voltage, ±0.005 µV/°C drift, 10 MHz gain bandwidth, and true rail-to-rail operation from 2.5 V to 5.5 V single supply - enabling direct interfacing with 16-bit+ ADCs in weigh scales and temperature transmitters.
For engineers reviewing the OPA4388ID datasheet, OPA4388ID pinout, OPA4388ID application, or OPA4388ID equivalent, this page provides verified specifications, SOIC-14 package details, quad-channel pin mapping, and validated alternatives for precision analog front-end design - with emphasis on low-offset stability, zero-crossover CMRR, and EMI-filtered inputs.
Technical Context
The OPA4388ID implements auto-zeroing and chopper-stabilized architecture to eliminate 1/f noise and maintain ultra-low offset drift across –40°C to +125°C. Its zero-crossover design preserves 140-dB CMRR at rail-to-rail common-mode input, avoiding output discontinuities during input transitions near supply rails.
Each of its four independent amplifiers features matched input bias current (±30 pA typ), 7.0 nV/√Hz input voltage noise at 1 kHz, and fast 2 µs settling to 0.01% for step responses - supporting high-speed, high-resolution data acquisition without linearity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | ±0.25 µV typical - enables sub-1-ppm error contribution in 24-bit ADC reference buffers |
| Offset Drift | ±0.005 µV/°C - ensures <±0.75 µV total drift over full industrial temperature range |
| Gain Bandwidth | 10 MHz - supports stable unity-gain operation with >60° phase margin into 10-kΩ//100-pF loads |
| Supply Range | 2.5 V to 5.5 V single supply - compatible with Li-ion, USB, and low-voltage industrial rails |
| CMRR | 102–110 dB (typ) over full common-mode range - maintains accuracy with unregulated sensor outputs |
| Input Noise | 140 nVPP (0.1 Hz to 10 Hz) - eliminates flicker noise impact in DC-coupled thermistor circuits |
| Settling Time | 2 µs to 0.01% - meets timing budgets for multiplexed 100-kSPS precision data loggers |
Pinout & Package
OPA4388ID is housed in a 14-pin SOIC (D) package measuring 8.65 mm × 3.90 mm, with exposed pad not present and standard JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives ADC input or DAC buffer with rail-to-rail swing (≤15 mV from rail) |
| 2 | –IN A | Inverting input, channel A - accepts differential signals from instrumentation amps or resistive bridges |
| 3 | +IN A | Noninverting input, channel A - high-impedance node (60 TΩ || 4.5 pF) for sensor voltage sensing |
| 4 | V+ | Positive supply - connects to 2.5–5.5 V rail; PSRR ≥124 dB minimizes supply ripple coupling |
| 5 | +IN B | Noninverting input, channel B - electrically isolated from channel A; no crosstalk per datasheet test |
| 6 | –IN B | Inverting input, channel B - matched offset and drift to channel A for dual-sensor differential pairs |
| 7 | OUT B | Amplifier B output - independently configurable; supports dual-channel simultaneous sampling |
| 8 | OUT C | Amplifier C output - identical AC/DC specs to OUT A/B; validated for multi-channel sensor arrays |
| 9 | –IN C | Inverting input, channel C - pin-confirmed functional in SOIC-14 layout; no NC ties required |
| 10 | +IN C | Noninverting input, channel C - same input impedance and EMI filtering as other channels |
| 11 | V– | Negative supply - referenced to ground in single-supply mode; supports true rail-to-rail input down to V– – 0.1 V |
| 12 | +IN D | Noninverting input, channel D - fully specified per OPA4388 revision D production data |
| 13 | –IN D | Inverting input, channel D - validated for 125°C operation with ≤±800 pA bias current |
| 14 | OUT D | Amplifier D output - delivers 5 V/µs slew rate and 126 dB open-loop gain at 125°C |
Key Features
| Feature | Design Value |
|---|---|
| Zero-crossover input stage | Eliminates output glitches during rail-to-rail common-mode transitions - critical for load-cell bridge excitation |
| EMI/RFI filtered inputs | Integrated RC filters suppress >100 MHz RF interference without external components - reduces PCB-level filtering |
| No 1/f noise | Flat 7.0 nV/√Hz spectral density from 0.1 Hz ensures stable baseline in long-integration lab instruments |
| True RRIO operation | Inputs accept signals from V– – 0.1 V to V+ + 0.1 V; outputs swing within 15 mV of rails - maximizes dynamic range |
| Industrial temp range | Specified from –40°C to +125°C with guaranteed offset drift and CMRR - suitable for under-hood automotive sensors |
Applications
| Weigh Scale Front-End | Lab Instrumentation Amplifier |
|---|---|
|
Use Scenario: Amplifies µV-level output from 4-wire load cells in digital kitchen or industrial scales. IC Role / Device Role / Timing Role: Precision instrumentation amplifier core (gain = 100–500) with matched quad channels for ratiometric bridge referencing. Use Value: ±0.25 µV offset and zero-crossover CMRR prevent nonlinearity errors at full-scale calibration points. |
Use Scenario: Buffers reference voltage and conditions sensor outputs in portable multimeters and oscilloscope front-ends. IC Role / Device Role / Timing Role: Quad-channel signal conditioner for simultaneous voltage, current, and temperature measurements. Use Value: 140 nVPP 0.1–10 Hz noise and 2 µs settling enable 6½-digit resolution without averaging delay. |
| Temperature Transmitter | Battery Test System |
|
Use Scenario: Converts RTD or thermistor resistance to 4–20 mA loop output in industrial process control. IC Role / Device Role / Timing Role: Precision current-source driver and cold-junction compensation amplifier in HART-enabled transmitters. Use Value: ±0.005 µV/°C drift ensures <±0.1°C error over –40°C to +85°C ambient without recalibration. |
Use Scenario: Measures voltage, current, and internal resistance of Li-ion cells during charge/discharge cycling. IC Role / Device Role / Timing Role: High-speed, low-drift front-end for 16-bit delta-sigma ADCs sampling at 10 kSPS. Use Value: 10 MHz GBW and 5 V/µs slew rate support accurate pulse-current measurement with minimal phase lag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4188IDR | Higher offset (±25 µV), lower GBW (2 MHz), no zero-crossover - lacks 140-dB CMRR at rail extremes | Suitable for lower-accuracy industrial controls but not for 24-bit ADC drivers | Select when cost sensitivity outweighs sub-ppm linearity requirements |
| LTC2057HMS#PBF | Lower noise (3.5 nV/√Hz), higher quiescent current (1.1 mA/ch), TSSOP-16 only - no SOIC-14 option | Preferred for ultra-low-noise medical sensors; incompatible pinout requires PCB redesign | Choose for battery-powered handheld instruments where noise dominates over power |
Compared with OPA4388ID, OPA4188IDR trades 100× higher offset for lower cost and wider supply range, while LTC2057HMS#PBF improves noise by 50% at 3× quiescent current and non-pin-compatible packaging - making OPA4388ID optimal for space-constrained, high-linearity, rail-to-rail industrial modules.
Availability
OPA4388ID is available at Aetrix Electronics and suitable for merchant PSU monitoring, notebook adapter feedback loops, and high-precision weigh scale manufacturing requiring stable component supply across extended product lifecycles.
Supply support for OPA4388ID 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 precision op-amp innovation.
The OPAx388 family was engineered specifically for high-resolution data acquisition systems demanding zero-drift stability, rail-to-rail fidelity, and immunity to EMI - targeting weigh scales, lab equipment, and industrial transmitters.
FAQ
What is the maximum operating temperature for OPA4388ID?
The OPA4388ID is fully specified from –40°C to +125°C ambient temperature. All key parameters - including offset voltage, drift, CMRR, and open-loop gain - are guaranteed across this industrial temperature range per Revision D production data. Thermal metrics confirm RθJA = 86.4°C/W for the SOIC-14 package, enabling reliable operation in enclosed enclosures without forced airflow.
Does OPA4388ID support true rail-to-rail input and output?
Yes, OPA4388ID supports true rail-to-rail input (V– – 0.1 V to V+ + 0.1 V) and output (within 15 mV of either rail with no load). This is confirmed in Section 6.7 of the SBOS777D datasheet under "Common-mode voltage range" and "Voltage output swing from rail." The zero-crossover architecture ensures continuous, glitch-free operation across the entire input range - unlike conventional RRIO op-amps that exhibit crossover distortion near supply rails.
What is the quiescent current per amplifier for OPA4388ID?
OPA4388ID draws 1.7–2.4 mA per amplifier at VS = ±1.25 V (2.5 V total) and 1.9–2.6 mA per amplifier at VS = ±2.75 V (5.5 V total), with no variation across –40°C to +125°C. As a quad device, total supply current ranges from 6.8 mA to 10.4 mA depending on supply voltage - enabling low-power precision performance in battery-backed instrumentation.
Is OPA4388ID pin-compatible with other OPAx388 variants?
No - OPA4388ID uses a 14-pin SOIC (D) package with dedicated pins for all four channels (including V– on pin 11 and V+ on pin 4), whereas OPA388 (single) uses 5- or 8-pin packages and OPA2388 (dual) uses 8-pin layouts. Pin mapping is unique to the quad version; direct substitution requires PCB redesign. However, electrical behavior and AC/DC specs are consistent across the OPAx388 family.
What load capacitance can OPA4388ID safely drive?
OPA4388ID is characterized to drive ≥100 pF capacitive loads with stable small-signal response (Figure 6-26), and supports resistive loads down to 2 kΩ while maintaining rail-to-rail output swing. For larger capacitive loads (>500 pF), external isolation resistor (e.g., 10–50 Ω) between amplifier output and load is recommended per Figure 6-26 guidance - ensuring phase margin remains >60° in closed-loop configurations.
OPA4388ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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-SOIC
OPA4388ID FAQ
1.How can I place an order for OPA4388ID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4388ID 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 OPA4388ID reliable?
The price and inventory of OPA4388ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4388ID is usually 5 days.
3.What payment methods are accepted for OPA4388ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4388ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4388ID?
OPA4388ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4388ID 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 OPA4388ID?
For technical support, including OPA4388ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4388ID requirements.
6.How does Aetrix verify that OPA4388ID is sourced from the original manufacturer or authorized distributors?
All OPA4388ID 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 OPA4388ID meets industry standards.
7.What is the process for return or replacement of OPA4388ID?
All OPA4388ID units undergo pre-shipment inspection (PSI). If there is an issue with OPA4388ID, 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 OPA4388ID part is unused and in its original packaging.
Return procedure for OPA4388ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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