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Texas Instruments OPA2388IDR
- Part No.:
- OPA2388IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2388IDR.pdf
- Description:
- IC OPAMP ZER-DRIFT 2CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,159
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Product details
Overview
OPA2388IDR from Texas Instruments is a dual-channel, precision zero-drift operational amplifier with ±0.25 µV offset voltage, ±0.005 µV/°C drift, 10 MHz gain bandwidth, true rail-to-rail input/output, and 7.0 nV/√Hz input voltage noise at 1 kHz - designed for high-accuracy signal conditioning in precision ADC/DAC interfaces, weigh scales, and temperature transmitters.
For engineers reviewing the OPA2388IDR datasheet, OPA2388IDR pinout, OPA2388IDR application, or OPA2388IDR equivalent, this page delivers verified specifications, package mapping to SOIC-8, real-world use cases in lab instrumentation and battery test systems, and validated alternative options for design continuity and sourcing resilience.
Technical Context
The OPA2388IDR employs auto-zeroing and chopper-stabilized architecture to eliminate 1/f noise and achieve zero-crossover behavior, delivering 140-dB CMRR across rail-to-rail common-mode range. Its EMI/RFI-filtered inputs and fast 2 µs settling to 0.01% support high-fidelity measurement in noisy industrial environments.
Specified over –40°C to +125°C with dual-supply operation (±1.25 V to ±2.75 V) or single-supply (2.5 V to 5.5 V), it maintains <±7.5 µV max offset and >120 dB open-loop gain across temperature - enabling stable DC-coupled gain stages without calibration drift in long-term embedded sensor systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | ±0.25 µV typical - enables sub-16-bit linearity preservation when driving 24-bit SAR or delta-sigma ADCs without trimming. |
| Offset Drift | ±0.005 µV/°C - ensures <±0.6 µV total drift over full industrial temperature range, eliminating thermal nulling circuits. |
| Gain Bandwidth | 10 MHz - supports stable unity-gain buffering of fast analog signals up to ~1 MHz with minimal phase lag. |
| Input Voltage Noise | 7.0 nV/√Hz at 1 kHz - low enough for µV-level thermocouple or strain gauge amplification without dominating system noise floor. |
| CMRR | 140 dB (typical, ±2.75 V supply) - rejects common-mode interference in unshielded sensor cables and high-impedance bridge configurations. |
| Supply Range | 2.5 V to 5.5 V single or ±1.25 V to ±2.75 V dual - compatible with Li-ion battery rails and standard 3.3 V/5 V logic domains. |
| Quiescent Current | 2.4 mA per amplifier (typical, 2.5 V supply) - balances ultra-low drift performance with moderate power budget in always-on monitoring nodes. |
Pinout & Package
OPA2388IDR is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm, with exposed pad not present and RoHS-compliant lead finish. Thermal resistance RθJA = 120.0°C/W enables operation up to +125°C ambient with standard PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives ADC reference buffer or DAC output stage with rail-to-rail swing (≤15 mV from rails, RL = 10 kΩ). |
| 2 | –IN A | Inverting input, channel A - accepts feedback network for precision gain configuration; high ZID (100 MΩ || 2 pF) minimizes loading error. |
| 3 | +IN A | Noninverting input, channel A - connects directly to low-leakage sensor sources (e.g., thermistor divider) with ±30 pA bias current. |
| 4 | V– | Negative supply terminal - referenced to ground in single-supply mode; must be decoupled with 0.1 µF ceramic near pin. |
| 5 | +IN B | Noninverting input, channel B - electrically isolated from channel A; supports dual-sensor differential acquisition (e.g., cold-junction + thermocouple). |
| 6 | –IN B | Inverting input, channel B - used for matched gain-setting with channel A in instrumentation-grade dual-path designs. |
| 7 | OUT B | Amplifier B output - independently buffered; no crosstalk (<–100 dB) between channels enables simultaneous high-speed sampling. |
| 8 | V+ | Positive supply terminal - accepts 2.5–5.5 V; PSRR >124 dB suppresses ripple from switching PSU outputs feeding the op amp. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-crossover rail-to-rail I/O | 140-dB CMRR maintained across full (V–)–0.1 V to (V+) + 0.1 V input range - eliminates output discontinuity errors in precision level-shifting applications. |
| No 1/f noise | 140 nVPP (0.1 Hz–10 Hz) - removes low-frequency drift artifacts critical for DC-coupled weigh scale and electronic thermometer front ends. |
| EMI/RFI filtered inputs | Integrated RF suppression on input pins reduces susceptibility to GSM/ISM-band interference without external RC filters - simplifies layout in compact sensor modules. |
| Fast overload recovery | 10 µs recovery from saturation - prevents data loss during transient overvoltage events in battery test equipment with dynamic load switching. |
| Industry-standard SOIC-8 | Pb-free, RoHS-compliant 8-pin SOIC package with 1.27 mm pitch - drop-in replaceable in existing layouts using standard reflow profiles (J-STD-020). |
Applications
| High-Precision Weigh Scale Front End | Lab Instrumentation Signal Chain |
|---|---|
|
Use Scenario: Amplifying µV-level output from 350 Ω load cell bridges in digital kitchen or industrial scales under varying temperature and vibration. IC Role / Device Role / Timing Role: Dual-channel precision instrumentation amplifier core - one channel for bridge excitation regulation, second for differential signal gain and offset correction. Use Value: ±0.25 µV offset and ±0.005 µV/°C drift ensure <0.001% full-scale error over –10°C to +40°C, eliminating factory recalibration. |
Use Scenario: Conditioning sensor outputs (RTD, thermocouple, pH electrode) in portable multimeters and benchtop DMMs requiring 6½-digit resolution. IC Role / Device Role / Timing Role: Low-noise, zero-drift buffer and programmable-gain stage preceding 24-bit delta-sigma ADCs. Use Value: 7.0 nV/√Hz noise and 10 MHz GBW enable clean 100 kHz signal acquisition without aliasing or SNR degradation. |
| Battery Test System Voltage Monitor | Temperature Transmitter Analog Output |
|
Use Scenario: Measuring cell voltage during charge/discharge cycling in automated battery formation testers with ±100 µV accuracy requirements. IC Role / Device Role / Timing Role: High-impedance, rail-to-rail input buffer isolating DUT from measurement circuitry while rejecting common-mode noise from switching loads. Use Value: 140-dB CMRR and EMI filtering prevent false voltage readings caused by PWM-driven contactors or DC-DC converters sharing chassis ground. |
Use Scenario: Converting 4–20 mA loop transmitter output to precise 0–5 V or ±2.5 V analog signal for PLC analog inputs in HVAC or process control. IC Role / Device Role / Timing Role: Precision output driver with true rail-to-rail swing ensuring full 0–5 V compliance even at 2.5 V supply - critical for low-voltage IoT gateways. Use Value: ≤15 mV output headroom at 10 kΩ load guarantees monotonic 0–5 V span without clipping at extremes, meeting IEC 61000-4-5 surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2188AIDR | Higher offset drift (±0.035 µV/°C), lower GBW (2 MHz), no EMI filtering - uses different auto-zero architecture. | Acceptable for lower-bandwidth DC sensors (e.g., pressure transducers) but unsuitable for fast-settling ADC drivers. | Select OPA2188AIDR only if cost sensitivity outweighs need for 10 MHz bandwidth and 2 µs settling in time-critical acquisition. |
| LTC2057HMS8#PBF | Lower noise (5.5 nV/√Hz), higher quiescent current (1.1 mA/channel), SO-8 package - requires separate VOS trim pin. | Better for ultra-low-noise µV applications (e.g., EEG front ends), but lacks integrated EMI filtering and rail-to-rail output swing. | Choose LTC2057HMS8#PBF when sub-6 nV/√Hz noise dominates design priority and board space allows external trim components. |
Compared with OPA2188AIDR and LTC2057HMS8#PBF, the OPA2388IDR uniquely combines 10 MHz bandwidth, zero-crossover rail-to-rail I/O, and EMI-hardened inputs - making it optimal for high-speed, high-accuracy sensor signal chains where layout simplicity and wide supply range are critical.
Availability
OPA2388IDR is available at Aetrix Electronics and suitable for merchant server PSU monitoring, notebook PC adapter feedback loops, and industrial weigh scale production requiring stable component supply and long-term lifecycle assurance.
Supply support for OPA2388IDR 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 signal chain solutions.
The OPAx388 family was engineered specifically for high-resolution data acquisition systems - targeting applications demanding ultra-low offset, zero drift, and rail-to-rail operation without sacrificing speed or noise performance.
FAQ
What is the maximum operating temperature for the OPA2388IDR?
The OPA2388IDR is fully specified from –40°C to +125°C ambient temperature. Its internal auto-zero circuitry remains stable across this range, with offset drift limited to ±7.5 µV max and open-loop gain maintained above 120 dB - enabling reliable deployment in automotive engine control units and industrial motor drives where junction temperatures exceed 100°C.
Does the OPA2388IDR require external capacitors for stability?
No, the OPA2388IDR is unity-gain stable and does not require external compensation capacitors. It drives capacitive loads up to 100 pF with <10% overshoot (per Figure 6-26), and its internal compensation ensures phase margin >60° across all gains and supply voltages - simplifying PCB layout in space-constrained sensor modules.
Can the OPA2388IDR operate from a single 3.3 V supply?
Yes, the OPA2388IDR supports single-supply operation from 2.5 V to 5.5 V. At 3.3 V, it delivers full rail-to-rail input common-mode range (–0.1 V to 3.4 V) and output swing within 15 mV of each rail (with 10 kΩ load), making it ideal for interfacing with 3.3 V microcontrollers and ADCs in portable instrumentation.
How does the EMI filtering in the OPA2388IDR improve system robustness?
The OPA2388IDR integrates on-chip R-C filters on both inputs that attenuate RF energy above 100 MHz - reducing susceptibility to cellular, Wi-Fi, and Bluetooth interference without external components. This prevents erroneous readings in medical devices or smart meters located near wireless transceivers, as confirmed by TI's EMIRR testing (Figure 6-38).
Is the OPA2388IDR pin-compatible with other dual op-amps in SOIC-8 packages?
No - the OPA2388IDR has a nonstandard pinout optimized for dual-channel independence: pins 1/7 are outputs, pins 2/6 are inverting inputs, pins 3/5 are noninverting inputs, and pins 4/8 are supplies. It is not pin-compatible with generic dual op-amps like LM2904 or TL072; layout redesign is required for substitution.
OPA2388IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 pA
- Voltage - Input Offset:
- 0.25 µV
- Current - Supply:
- 1.9mA (x2 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:
- 8-SOIC
OPA2388IDR FAQ
1.How can I place an order for OPA2388IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2388IDR 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 OPA2388IDR reliable?
The price and inventory of OPA2388IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2388IDR is usually 5 days.
3.What payment methods are accepted for OPA2388IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2388IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2388IDR?
OPA2388IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2388IDR 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 OPA2388IDR?
For technical support, including OPA2388IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2388IDR requirements.
6.How does Aetrix verify that OPA2388IDR is sourced from the original manufacturer or authorized distributors?
All OPA2388IDR 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 OPA2388IDR meets industry standards.
7.What is the process for return or replacement of OPA2388IDR?
All OPA2388IDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2388IDR, 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 OPA2388IDR part is unused and in its original packaging.
Return procedure for OPA2388IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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