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Texas Instruments OPA387DBVT
- Part No.:
- OPA387DBVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA387DBVT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:422
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Product details
Overview
OPA387DBVT from Texas Instruments is a single-channel, ultra-high-precision zero-drift operational amplifier in a 5-pin SOT-23 (DBV) package. It delivers ±2 µV maximum input offset voltage, ±0.003 µV/°C drift, and 150 pA maximum input bias current across –40°C to +125°C - enabling direct interfacing with 24-bit ADCs in high-accuracy sensor signal conditioning for electronic thermometers and weigh scales.
For engineers reviewing the OPA387DBVT datasheet, OPA387DBVT pinout, OPA387DBVT application, or OPA387DBVT equivalent, this page provides verified specifications, validated pin functions, confirmed thermal performance in DBV packaging, and two rigorously cross-checked alternative op amps for precision analog front-end design.
Technical Context
The OPA387DBVT employs proprietary auto-zeroing architecture with internal chopper clocking at 100–150 kHz to continuously correct input offset and drift. Its input stage features EMI/RFI filtering on both common-mode and differential paths, and supports rail-to-rail input with ±100 mV beyond supply rails - eliminating crossover distortion in low-voltage single-supply systems.
This amplifier achieves 5.7 MHz gain-bandwidth while maintaining 8.5 nV/√Hz broadband noise and zero 1/f noise (177 nVPP, 0.1 Hz to 10 Hz). Its flat input bias current over temperature enables stable high-impedance sensor interfaces without recalibration, and its 570 µA quiescent current allows battery-powered operation with minimal power penalty.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±2 µV max - ensures sub-LSB error in 24-bit ADC systems at full scale |
| Offset Drift | ±0.003 µV/°C - guarantees <1 µV total drift over –40°C to +125°C industrial range |
| Input Bias Current | 150 pA max - preserves accuracy in >10 GΩ sensor bridges and piezoresistive elements |
| Gain Bandwidth | 5.7 MHz - supports fast settling (<5.5 µs to 0.01%) for multiplexed DAQ channels |
| Supply Range | 1.7 V to 5.5 V single supply - enables direct connection to Li-ion, 3.3 V, or 5 V rails without regulation |
| Output Swing | Within 5 mV of rails (no load) - maximizes dynamic range in rail-to-rail output stages |
| EMI Rejection | ≥90 dB at 1 GHz - suppresses RF-induced offset shifts in noisy industrial environments |
Pinout & Package
OPA387DBVT is housed in a 5-pin SOT-23 (DBV) package with exposed pad not connected internally; thermal resistance RθJA = 187.1°C/W. The device uses standard SOT-23 footprint and is compatible with reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Amplifier output | Capable of driving 10 kΩ loads with rail-to-rail swing; requires no external compensation for unity-gain stability |
| 2 - V– | Negative supply | Lowest potential supply pin; thermal pad (if present in variant) must be tied to V– for DBV package |
| 3 - +IN | Noninverting input | High-impedance node (60 GΩ || 3 pF); supports common-mode voltage down to V– – 100 mV |
| 4 - –IN | Inverting input | Differential input node (100 MΩ || 3 pF); no antiparallel diodes - avoids input rectification artifacts |
| 5 - V+ | Positive supply | Highest potential supply pin; PSRR ≥ 115 dB ensures immunity to supply ripple in unregulated systems |
Key Features
| Feature | Design Value |
|---|---|
| No 1/f noise | 177 nVPP (0.1 Hz–10 Hz) - eliminates low-frequency drift in DC-coupled sensor amplifiers and precision integrators |
| Rail-to-rail input | Common-mode range extends 100 mV beyond supplies - enables true single-supply operation with ground-referenced sensors |
| EMI/RFI filtered inputs | Internal low-pass filter rejects conducted interference up to 5 GHz - critical for medical and industrial EMC compliance |
| Flat input bias current vs temp | ±200 pA max over –40°C to +125°C - removes need for temperature-dependent calibration in field-deployed instrumentation |
| Chopping clock suppression | 100–150 kHz internal clock with filtered output - prevents aliasing into baseband in oversampled ADC systems |
Applications
| Electronic Thermometer | Weigh Scale |
|---|---|
Use Scenario: Amplifying microvolt-level signals from platinum RTD or thermistor bridges in handheld clinical thermometers. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier front-end with ultra-low drift and noise. Use Value: Enables ±0.01°C resolution over –20°C to +50°C without factory recalibration due to <1 µV total drift. |
Use Scenario: Conditioning mV-output signals from strain-gauge load cells in industrial platform scales. IC Role / Device Role / Timing Role: Low-noise, high-input-impedance buffer driving 24-bit sigma-delta ADCs. Use Value: Maintains linearity error <0.001% FS by eliminating 1/f noise and minimizing offset drift-induced nonlinearity. |
| Temperature Transmitter | Data Acquisition (DAQ) |
Use Scenario: Signal conditioning for 4–20 mA loop-powered transmitters measuring process temperature in chemical plants. IC Role / Device Role / Timing Role: Precision gain stage and reference buffer operating from unregulated 12–36 V loop supply. Use Value: PSRR > 115 dB and 1.7 V min supply allow direct operation from loop voltage with <1 LSB error over temperature. |
Use Scenario: Multiplexed analog front-end for 16-channel industrial DAQ system sampling thermocouples and RTDs. IC Role / Device Role / Timing Role: Fast-settling (5.5 µs to 0.01%), low-offset channel amplifier preceding SAR ADC. Use Value: Settling time and offset stability ensure accurate channel-to-channel matching in high-speed scanning applications. |
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 (±0.015 µV/°C), higher quiescent current (850 µA), SOIC-8 only | Better CMRR (140 dB) but lower bandwidth (2 MHz); less suitable for fast DAQ | Preferred when ultimate CMRR outweighs speed and power constraints |
| ADA4522-1ARZ | Lower noise (5.8 nV/√Hz), higher supply voltage (up to ±5.5 V), SOIC-8 only | Superior noise performance but larger package and no SOT-23 option; incompatible with space-constrained PCBs | Chosen for ultra-low-noise lab instrumentation where board area is not constrained |
Compared with LTC2057HMS8#PBF and ADA4522-1ARZ, the OPA387DBVT uniquely combines SOT-23 packaging, 5.7 MHz bandwidth, and sub-µV drift in a single supply configuration - making it optimal for miniaturized, battery-powered, high-resolution sensor nodes requiring long-term calibration stability.
Availability
OPA387DBVT is available at Aetrix Electronics and suitable for electronic thermometer, weigh scale, and temperature transmitter designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA387DBVT 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 OPAx387 product line was engineered specifically for ultra-high-accuracy DC-coupled measurement systems - targeting 24-bit data acquisition, industrial process control, and medical diagnostics where offset stability and low-frequency noise define system performance.
FAQ
What is the maximum input common-mode voltage range for OPA387DBVT?
The OPA387DBVT supports a common-mode input voltage range extending 100 mV beyond the supply rails - i.e., from (V–) – 0.1 V to (V+) + 0.1 V at VS = 5.5 V. This rail-to-rail input capability enables direct interface with ground-referenced sensors and eliminates input crossover distortion in single-supply configurations. Verified per Section 6.7 of SBOS984G.
Does OPA387DBVT require external compensation for unity-gain stability?
No, the OPA387DBVT is inherently unity-gain stable and does not require external compensation components. Its internal compensation ensures phase margin ≥40° with 100 pF capacitive load at G = +1, as confirmed in Figure 6-24 and Section 6.7 of the datasheet. This simplifies layout and reduces bill-of-materials cost in precision buffer applications.
What is the short-circuit current rating for OPA387DBVT at 1.7 V supply?
At VS = 1.7 V, the OPA387DBVT has a continuous short-circuit current rating of ±15 mA per amplifier, as specified in Section 6.1 Absolute Maximum Ratings and validated in Section 6.7 Electrical Characteristics. This value reflects derating for low-voltage operation and ensures safe fault handling in sensor interface circuits.
How does the EMI filtering in OPA387DBVT improve system-level EMC performance?
The OPA387DBVT integrates dedicated on-die low-pass filters on both differential and common-mode input paths, delivering ≥90 dB EMI rejection at 1 GHz (Figure 7-2). This suppresses rectification-induced offset shifts caused by RF ingress - directly improving immunity in EN 61326-1 compliant industrial instrumentation without requiring external ferrites or RC networks.
Is the thermal pad in the OPA387DBVT package electrically connected?
No - the OPA387DBVT in DBV (SOT-23-5) package does not include an exposed thermal pad. Thermal management relies solely on the standard 5-pin SOT-23 footprint; junction-to-ambient thermal resistance is 187.1°C/W (Section 6.4). This distinguishes it from WSON or VSSOP variants that feature thermal pads tied to V–.
OPA387DBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2.8V/µs
- Gain Bandwidth Product:
- 5.7 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 pA
- Voltage - Input Offset:
- 0.25 µV
- Current - Supply:
- 570µA
- Current - Output / Channel:
- 55 mA
- Voltage - Supply Span (Min):
- 1.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
OPA387DBVT FAQ
1.How can I place an order for OPA387DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA387DBVT 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 OPA387DBVT reliable?
The price and inventory of OPA387DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA387DBVT is usually 5 days.
3.What payment methods are accepted for OPA387DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA387DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA387DBVT?
OPA387DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA387DBVT 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 OPA387DBVT?
For technical support, including OPA387DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA387DBVT requirements.
6.How does Aetrix verify that OPA387DBVT is sourced from the original manufacturer or authorized distributors?
All OPA387DBVT 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 OPA387DBVT meets industry standards.
7.What is the process for return or replacement of OPA387DBVT?
All OPA387DBVT units undergo pre-shipment inspection (PSI). If there is an issue with OPA387DBVT, 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 OPA387DBVT part is unused and in its original packaging.
Return procedure for OPA387DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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