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Texas Instruments TLV2387DGKR
- Part No.:
- TLV2387DGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TLV2387DGKR.pdf
- Description:
- DUAL ULTRA-HIGH-PRECISION
- Quantity:
- Payment:
- Shipping:
Inventory:529
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Product details
Overview
TLV2387DGKR from Texas Instruments is a dual-channel, zero-drift, precision operational amplifier optimized for high-accuracy signal conditioning in low-voltage, single-supply systems. It delivers ±10 µV max offset voltage, ±0.01 µV/°C drift, 5.7 MHz gain bandwidth, 8.5 nV/√Hz noise at 1 kHz, and rail-to-rail input extending 100 mV beyond supplies - enabling direct interfacing with 16–24-bit ADCs in weigh scales and temperature transmitters.
For engineers reviewing the TLV2387DGKR datasheet, TLV2387DGKR pinout, TLV2387DGKR application, or TLV2387DGKR equivalent, key selection criteria include ultra-low drift over –40°C to +125°C, 300 pA max input bias current for high-Z sensor front-ends, EMI-filtered inputs for noisy industrial environments, and guaranteed operation from 1.7 V to 5.5 V single supply.
Technical Context
The TLV2387DGKR implements proprietary auto-zeroing with internal clocking (100–150 kHz) to continuously correct input offset and drift without introducing 1/f noise - verified by 177 nVPP (0.1 Hz–10 Hz) and flat 8.5 nV/√Hz spectral density. Its input stage features matched CMOS topology with no antiparallel diodes, enabling true rail-to-rail common-mode range (V– – 100 mV to V+ + 100 mV) and high impedance (>60 GΩ || 3 pF).
Internally filtered EMI rejection exceeds 120 dB at 1 GHz, and the amplifier is unity-gain stable with 40° phase margin into 100 pF. Output swing reaches within 20 mV of rails under no load and maintains >120 dB open-loop gain (AOL) across temperature, supporting high-linearity buffering of DACs and precision sensor outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset voltage | ±10 µV max - ensures <0.0002% error in 5-V full-scale 24-bit ADC systems without calibration |
| Offset drift | ±0.01 µV/°C - guarantees <0.25 µV total drift over –40°C to +125°C, critical for uncalibrated field instrumentation |
| Input bias current | 300 pA max - enables use with >100 MΩ source impedances (e.g., thermistors, piezoresistive sensors) without significant DC error |
| Gain bandwidth | 5.7 MHz - supports stable closed-loop gain ≥10 at 500 kHz, suitable for fast-settling data acquisition channels |
| Supply range | 1.7 V to 5.5 V single supply - operates directly from Li-ion, 3.3-V logic, or regulated 2.5-V rails without level-shifting |
| Input voltage noise | 8.5 nV/√Hz @ 1 kHz - contributes <1.2 µV RMS noise in 10-kHz bandwidth, preserving SNR in precision DAQ |
| Common-mode range | V– – 100 mV to V+ + 100 mV - allows direct sensing of signals below ground or above supply in single-supply configurations |
Pinout & Package
DGK package is an 8-pin VSSOP (2.3 mm × 2.0 mm, 0.5 mm pitch) with exposed thermal pad connected to V– for enhanced thermal performance and EMI immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT A | Output | Amplifier A output; rail-to-rail swing within 20 mV of V–/V+ under no load |
| 2 - –IN A | Input | Inverting input for channel A; matched impedance critical to minimize clock-induced charge injection |
| 3 - +IN A | Input | Noninverting input for channel A; supports common-mode down to V– – 100 mV |
| 4 - V– | Power | Negative supply rail; thermal pad must be soldered to PCB ground plane for thermal stability |
| 5 - +IN B | Input | Noninverting input for channel B; electrically isolated from channel A, no crosstalk >140 dB @ 1 MHz |
| 6 - –IN B | Input | Inverting input for channel B; identical bias current and offset specs as channel A |
| 7 - OUT B | Output | Amplifier B output; independent operation enables dual-sensor conditioning on single IC |
| 8 - V+ | Power | Positive supply rail; PSRR >130 dB ensures immunity to supply ripple in battery-powered systems |
Key Features
| Feature | Design Value |
|---|---|
| No 1/f noise | 177 nVPP (0.1 Hz–10 Hz) - eliminates low-frequency drift artifacts in slow-sampling applications like electronic thermometers |
| EMI-filtered inputs | 120+ dB rejection at 1 GHz - prevents offset shifts from RF interference in motor drives or wireless base stations |
| Rail-to-rail input | V– – 100 mV to V+ + 100 mV - enables direct measurement of signals outside supply rails, e.g., shunt-based current sensing |
| Low quiescent current | 570 µA per amplifier - supports always-on sensor nodes with multi-year battery life at 3.3 V |
| High CMRR | 138 dB typical @ 25°C - rejects common-mode noise from long sensor cables in industrial analog input modules |
Applications
| Electronic Thermometer | Weigh Scale |
|---|---|
Use Scenario: Measures resistance of Pt100/1000 RTD sensors in medical or HVAC thermostats using constant-current excitation and ratiometric ADC conversion. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end; provides low-drift gain and offset correction before 24-bit sigma-delta ADC. Use Value: ±0.01 °C accuracy over –40°C to +85°C without factory calibration, enabled by <0.25 µV total drift and 300 pA bias current. | Use Scenario: Condition signals from micro-strain gauge bridges in platform scales and industrial load cells operating from 3.3-V battery or USB power. IC Role / Device Role / Timing Role: Low-noise, zero-drift difference amplifier with programmable gain; interfaces bridge output to SAR ADC. Use Value: Resolves <10 µg resolution at 10 kg full scale, sustained by 8.5 nV/√Hz noise and 5.7 MHz bandwidth for fast settling. |
| Temperature Transmitter | Analog Input Module |
Use Scenario: Converts 4–20 mA loop-powered sensor outputs (e.g., thermocouples, RTDs) to isolated digital data in process control systems. IC Role / Device Role / Timing Role: High-impedance buffer and precision voltage reference driver; conditions signal prior to isolation barrier. Use Value: Maintains 0.05% total error over 15-year field life due to ±0.01 µV/°C drift and 300 pA bias current minimizing resistor self-heating errors. | Use Scenario: Front-end signal conditioning for modular PLC I/O cards accepting multiple sensor types (voltage, current, RTD) with software-configurable ranges. IC Role / Device Role / Timing Role: Dual-channel programmable-gain amplifier (PGA); one channel for sensor gain, second for reference buffering. Use Value: Enables single-board support for ±10 mV to ±10 V inputs with <0.001% nonlinearity, leveraging rail-to-rail input and 120 dB CMRR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189IDGKT | Lower offset (±0.005 µV typ), higher IQ (700 µA), same 5.7 MHz GBW and VSSOP-8 package | Better for metrology-grade calibration equipment; less suitable for battery-constrained nodes | Choose OPA2189IDGKT when sub-µV offset stability is mandatory and power budget allows +23% IQ |
| LTC2057HMS8#PBF | Higher offset drift (±0.03 µV/°C), lower noise (6.5 nV/√Hz), SOIC-8 only, no EMI filtering | Preferred in low-noise audio preamps; lacks EMI hardening for industrial motor drive environments | Choose LTC2057HMS8#PBF where ultra-low broadband noise dominates over EMI immunity and temperature drift |
Compared with OPA2189IDGKT and LTC2057HMS8#PBF, TLV2387DGKR offers the optimal balance of ultra-low drift, integrated EMI filtering, and 570 µA quiescent current - making it uniquely suited for cost-sensitive, field-deployed instrumentation requiring long-term stability without recalibration.
Availability
TLV2387DGKR is available at Aetrix Electronics and suitable for electronic thermometer, weigh scale, and temperature transmitter applications requiring stable component supply across automotive, industrial, and medical device production programs.
Supply support for TLV2387DGKR 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 heritage in precision amplifiers and signal-chain solutions.
The TLVx387 product line was designed specifically for high-resolution data acquisition systems demanding zero-drift performance, low power, and robustness in unregulated or noisy supply environments - targeting sensor signal conditioning in industrial, test & measurement, and medical instrumentation.
FAQ
What is the maximum operating temperature range for TLV2387DGKR?
The TLV2387DGKR 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, enabling reliable deployment in engine control units, factory automation sensors, and outdoor environmental monitoring systems without derating.
Does TLV2387DGKR support true rail-to-rail input and output?
Yes, TLV2387DGKR supports rail-to-rail input with common-mode range extending 100 mV beyond both supply rails (V– – 100 mV to V+ + 100 mV), and rail-to-rail output that swings within 20 mV of V– and V+ under no load. This allows direct interfacing with low-voltage sensors and ADCs without external level-shifting circuitry.
How does the internal zero-drift architecture affect noise performance in TLV2387DGKR?
The TLV2387DGKR's auto-zeroing architecture eliminates 1/f noise entirely, delivering flat 8.5 nV/√Hz voltage noise density from 1 Hz to 100 kHz and only 177 nVPP integrated noise (0.1 Hz–10 Hz). Unlike chopper-stabilized amplifiers with switching artifacts, its internal clock is filtered and does not appear at the output under normal operating conditions.
Can TLV2387DGKR be used in single-supply battery-powered applications?
Yes, TLV2387DGKR operates from 1.7 V to 5.5 V single supply with only 570 µA quiescent current per amplifier. Its rail-to-rail input/output, high PSRR (>130 dB), and low drift make it ideal for battery-powered devices such as portable gas analyzers and handheld multimeters where supply regulation is omitted to reduce size and cost.
Is the TLV2387DGKR pin-compatible with other dual op amps in VSSOP-8 packages?
No, TLV2387DGKR has a non-standard pinout: 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 (e.g., LMV358, TLV2462). Layout must follow TI's DGK pin mapping to ensure proper channel separation and thermal pad grounding.
TLV2387DGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Chopper (Zero-Drift)
- Number of Circuits:
- 2
- Output Type:
- Single Ended, Rail-to-Rail
- Slew Rate:
- 2.8V/µs
- Gain Bandwidth Product:
- 5.7 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 60 pA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 570µA (x2 Channels)
- 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:
- 8-VSSOP
TLV2387DGKR FAQ
1.How can I place an order for TLV2387DGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2387DGKR 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 TLV2387DGKR reliable?
The price and inventory of TLV2387DGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2387DGKR is usually 5 days.
3.What payment methods are accepted for TLV2387DGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2387DGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2387DGKR?
TLV2387DGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2387DGKR 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 TLV2387DGKR?
For technical support, including TLV2387DGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2387DGKR requirements.
6.How does Aetrix verify that TLV2387DGKR is sourced from the original manufacturer or authorized distributors?
All TLV2387DGKR 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 TLV2387DGKR meets industry standards.
7.What is the process for return or replacement of TLV2387DGKR?
All TLV2387DGKR units undergo pre-shipment inspection (PSI). If there is an issue with TLV2387DGKR, 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 TLV2387DGKR part is unused and in its original packaging.
Return procedure for TLV2387DGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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