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Texas Instruments OPA2388ID
- Part No.:
- OPA2388ID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2388ID.pdf
- Description:
- IC OPAMP
- Quantity:
- Payment:
- Shipping:
Inventory:1,683
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Product details
Overview
OPA2388ID from Texas Instruments is a dual-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, and 10 MHz gain bandwidth while operating from ±1.25 V to ±2.75 V (or 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 OPA2388ID datasheet, OPA2388ID pinout, OPA2388ID application, or OPA2388ID equivalent, this page provides verified electrical specifications, SOIC-8 package details, true RRIO performance context, and validated alternatives for precision analog front-end design - with emphasis on low-noise, zero-crossover CMRR, and fast 2 µs settling to 0.01%.
Technical Context
The OPA2388ID implements auto-zeroing architecture with chopper-stabilized input stage to eliminate 1/f noise and achieve near-zero drift over –40°C to +125°C. Its zero-crossover design maintains 140 dB CMRR across full rail-to-rail common-mode range, eliminating output discontinuities during input transitions near supply rails.
It features EMI/RFI-filtered inputs, 7.0 nV/√Hz broadband noise at 1 kHz, and 140 nVPP integrated noise (0.1 Hz–10 Hz). The device drives capacitive loads up to 100 pF without instability and supports unity-gain stable operation with 5 V/µs slew rate and 0.0005% THD+N at 1 kHz.
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 <±0.75 µV total offset shift over –40°C to +125°C industrial range. |
| Gain Bandwidth | 10 MHz - supports stable closed-loop gain ≥10 at 1 MHz for anti-aliasing filter interfaces. |
| Supply Range | ±1.25 V to ±2.75 V (dual) or 2.5 V to 5.5 V (single) - compatible with Li-ion battery-powered and industrial 3.3 V/5 V systems. |
| CMRR | 140 dB at ±2.75 V - preserves signal integrity in high-common-mode-noise environments like motor current sensing. |
| Settling Time | 2 µs to 0.01% for 1-V step - meets timing budgets for multiplexed precision data acquisition at >100 kSPS. |
| Input Noise | 7.0 nV/√Hz @ 1 kHz; 140 nVPP (0.1–10 Hz) - eliminates 1/f noise contribution in DC-coupled sensor amplifiers. |
Pinout & Package
OPA2388ID is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm, rated for –40°C to +125°C operation. Thermal resistance RθJA = 120.0°C/W supports moderate-power analog signal chains without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives ADC reference buffer or transducer signal path with rail-to-rail swing. |
| 2 | –IN A | Inverting input, channel A - accepts feedback network for precision gain configuration (e.g., I/V conversion). |
| 3 | +IN A | Noninverting input, channel A - connects to low-impedance sensor source or reference voltage node. |
| 4 | V– | Negative supply terminal - must be decoupled with 0.1 µF ceramic capacitor to ground for noise immunity. |
| 5 | +IN B | Noninverting input, channel B - isolated from channel A for dual-sensor differential measurement. |
| 6 | –IN B | Inverting input, channel B - enables independent gain/offset adjustment per channel in multi-channel systems. |
| 7 | OUT B | Amplifier B output - supports simultaneous dual-path signal conditioning (e.g., temperature + voltage monitoring). |
| 8 | V+ | Positive supply terminal - accepts 2.5–5.5 V single or ±1.25–±2.75 V dual supply with tight PSRR (±0.1 µV/V). |
Key Features
| Feature | Design Value |
|---|---|
| Zero-crossover RRIO | Maintains 140 dB CMRR across entire input range (V– –0.1 V to V+ +0.1 V), eliminating output glitches during rail transitions. |
| No 1/f noise | Flat 7.0 nV/√Hz spectral density down to 0.1 Hz - critical for DC-stable thermopile or strain gauge amplification. |
| EMI/RFI filtered inputs | Integrated RF rejection suppresses >100 MHz interference from switching power supplies without external LC filters. |
| Fast overload recovery | 10 µs recovery from saturation - prevents dead time in closed-loop current control or fast-settling DAC buffers. |
| True rail-to-rail output | Swings within 15 mV of rails (no load) - maximizes dynamic range for 3.3 V ADCs without level-shifting circuitry. |
Applications
| Weigh Scale Front-End | Lab Instrumentation Signal Chain |
|---|---|
Use Scenario: Amplifying µV-level bridge outputs from precision load cells under varying temperature and EMI conditions. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier core with matched gain/offset tracking between channels A and B. Use Value: ±0.25 µV offset and ±0.005 µV/°C drift enable <1 ppm total error over temperature - meeting Class III legal-for-trade accuracy requirements. |
Use Scenario: Buffering high-resolution DAC outputs (e.g., 20-bit DAC856x) into multiplexed ADC sampling paths. IC Role / Device Role / Timing Role: Precision output driver with 2 µs 0.01% settling ensuring no aperture error in synchronized sample-and-hold systems. Use Value: Zero-crossover behavior prevents distortion during full-scale DAC transitions, preserving SFDR >110 dB. |
| Temperature Transmitter | Battery Test System |
Use Scenario: Conditioning Pt100/RTD signals in 4–20 mA loop-powered transmitters with wide ambient temperature variation. IC Role / Device Role / Timing Role: Low-drift, low-noise PGA stage preceding ΣΔ ADC, powered from 3.3 V regulated supply. Use Value: 140 nVPP (0.1–10 Hz) noise and 126 dB open-loop gain ensure <0.001°C resolution over –40°C to +85°C. |
Use Scenario: Measuring microampere-level leakage currents during battery formation and aging tests. IC Role / Device Role / Timing Role: Ultra-low-input-bias-current (±30 pA typ.) transimpedance amplifier for femtoampere current sensing. Use Value: Input bias current drift <±0.05 pA/°C minimizes thermal EMF-induced offset drift in guarded test fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2057HMS8#PBF | Higher offset drift (±0.025 µV/°C), lower GBW (3 MHz), no EMI filtering. | Less suitable for high-frequency precision DAC buffering; better for ultra-low-drift DC-only applications. | Choose when long-term DC stability outweighs speed and EMI robustness. |
| ADA4522-2ARZ | Lower noise (5.8 nV/√Hz), higher quiescent current (1.8 mA/channel), same zero-drift architecture. | Preferred for ultra-low-noise sensor interfaces where power budget allows >3.6 mA total supply current. | Choose when 1.2 nV/√Hz noise reduction justifies 2× higher IQ and larger PCB footprint. |
Compared with LTC2057HMS8#PBF and ADA4522-2ARZ, the OPA2388ID offers superior combination of speed (10 MHz GBW), EMI immunity, and industry-standard SOIC-8 packaging - making it optimal for cost-sensitive, space-constrained, high-EMI industrial signal chains requiring both precision and responsiveness.
Availability
OPA2388ID is available at Aetrix Electronics and suitable for weigh scale manufacturing, lab instrument production, and battery test system integration requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA2388ID 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 delivering analog and embedded processing solutions, with deep expertise in precision signal chain design and automotive-grade reliability validation.
The OPAx388 family was engineered specifically for high-resolution data acquisition systems demanding zero-drift, zero-crossover, and true rail-to-rail operation - targeting applications where traditional precision op-amps introduce nonlinearity or settling errors.
FAQ
What is the maximum capacitive load the OPA2388ID can drive without compensation?
The OPA2388ID is specified to drive up to 100 pF capacitive load while maintaining stability and minimal overshoot (<10%) in unity-gain configuration, as confirmed in Figure 6-26 of the SBOS777D datasheet. For loads exceeding 100 pF, external series resistor (typically 10–50 Ω) at the output is recommended to isolate capacitance and preserve phase margin. This capability makes the OPA2388ID suitable for direct connection to ADC input capacitors and long PCB traces in automated test equipment.
Does the OPA2388ID support single-supply operation down to 2.5 V?
Yes, the OPA2388ID operates reliably from 2.5 V to 5.5 V single supply, with full rail-to-rail input and output swing specified across this range. At 2.5 V, it maintains ±0.25 µV typical offset, 10 MHz gain bandwidth, and 2 µs settling to 0.01%, enabling use in battery-powered portable instruments. The device's input common-mode range extends to (V–) –0.1 V and (V+) +0.1 V, allowing direct sensing of ground-referenced signals even at minimum supply.
How does the zero-crossover feature of the OPA2388ID improve performance in precision applications?
The zero-crossover feature ensures continuous, glitch-free operation when the input common-mode voltage crosses the internal amplifier's transition region - a known source of nonlinearity in conventional rail-to-rail op-amps. For the OPA2388ID, this translates to sustained 140 dB CMRR across the full input range (V– –0.1 V to V+ +0.1 V), eliminating output discontinuities that would corrupt measurements in weigh scales or RTD interfaces. This behavior is verified in Figure 6-27 ("No Phase Reversal") of the OPA2388ID datasheet.
Is the OPA2388ID pin-compatible with other devices in the OPAx388 family?
No - the OPA2388ID (SOIC-8) shares pinout with the OPA2388 in VSSOP-8 but differs from the single-channel OPA388 (SOT-23-5, SOIC-8, VSSOP-8) and quad-channel OPA4388 (SOIC-14, TSSOP-14). Pin mapping is identical only between OPA2388 variants: SOIC-8 (D) and VSSOP-8 (DGK) share identical 1–8 pin functions (OUT A, –IN A, +IN A, V–, +IN B, –IN B, OUT B, V+). Cross-referencing requires checking Device Information tables in SBOS777D Section 5.
What is the typical quiescent current per amplifier for the OPA2388ID at 5.5 V supply?
The OPA2388ID draws 1.9–2.6 mA per amplifier at VS = ±2.75 V (5.5 V total), with 2.4 mA typical at TA = 25°C and IO = 0 A, as specified in Section 6.7 Electrical Characteristics of SBOS777D. This current remains stable across –40°C to +125°C, supporting consistent thermal performance in unventilated enclosures. Total device supply current is therefore 3.8–5.2 mA, enabling efficient use in dual-channel precision systems with tight power budgets.
OPA2388ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- 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:
- 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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA2388ID FAQ
1.How can I place an order for OPA2388ID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2388ID 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 OPA2388ID reliable?
The price and inventory of OPA2388ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2388ID is usually 5 days.
3.What payment methods are accepted for OPA2388ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2388ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2388ID?
OPA2388ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2388ID 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 OPA2388ID?
For technical support, including OPA2388ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2388ID requirements.
6.How does Aetrix verify that OPA2388ID is sourced from the original manufacturer or authorized distributors?
All OPA2388ID 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 OPA2388ID meets industry standards.
7.What is the process for return or replacement of OPA2388ID?
All OPA2388ID units undergo pre-shipment inspection (PSI). If there is an issue with OPA2388ID, 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 OPA2388ID part is unused and in its original packaging.
Return procedure for OPA2388ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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