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Analog Devices Inc. LT6018HS8E#PBF
- Part No.:
- LT6018HS8E#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
LT6018HS8E#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:144
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Product details
Overview
LT6018HS8E#PBF from Analog Devices (formerly Linear Technology) is a 33V ultralow-noise precision operational amplifier in an 8-lead SOIC-8E exposed-pad package, specified for –40°C to 125°C operation. It delivers 30nVP–P (0.1Hz–10Hz), 1.2nV/√Hz broadband noise, ≤50µV max input offset voltage, 0.5µV/°C max drift, and 124dB min CMRR - enabling high-fidelity signal conditioning in precision data acquisition systems.
For engineers reviewing the LT6018HS8E#PBF datasheet, LT6018HS8E#PBF pinout, LT6018HS8E#PBF application, or LT6018HS8E#PBF equivalent, key selection criteria include its H-grade extended temperature range, enable-controlled shutdown (6.2µA), 30V/µs slew rate, 15MHz gain-bandwidth product, and SOIC-8E thermal performance with exposed pad tied to V–.
Technical Context
The LT6018HS8E#PBF employs a proprietary input stage with series Zener diode protection-eliminating conventional input clamping diodes-to maintain ultralow bias current under transient overdrive while preserving DC precision. Its dual-supply architecture supports ±4V to ±16.5V operation, with DGND referenced to V– and EN threshold defined relative to DGND.
It integrates an active enable circuit that transitions fully within 25µs, maintaining output drive capability (not high-Z) during shutdown. The SOIC-8E package features an exposed pad electrically connected to V–, reducing θJA to 36°C/W when properly soldered to a thermal plane-critical for stable operation at 125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Noise (0.1–10Hz) | 30nVP–P: Enables sub-16-bit resolution in low-frequency precision measurement without 1/f noise degradation. |
| Input Offset Voltage | ±50µV max: Ensures <0.001% gain error in 5V full-scale instrumentation amplifiers. |
| Offset Drift | ±0.5µV/°C max: Limits drift-induced error to <6µV across –40°C to 125°C ambient range. |
| CMRR | 124dB min: Rejects >177,000:1 common-mode interference in bridge sensor interfaces. |
| Slew Rate | 30V/µs: Supports clean 10V step response in <0.34µs for fast-settling ADC drivers. |
| GBW Product | 15MHz: Allows stable unity-gain buffering of signals up to ~1.5MHz with <0.1dB flatness. |
| Supply Range | 8V to 33V: Compatible with industrial ±15V rails and wide-input single-supply systems (e.g., 24V PLC I/O). |
| Shutdown Current | 6.2µA typical: Reduces power by >99.9% vs active mode (7.65mA), enabling battery-powered duty-cycled sensing. |
Pinout & Package
LT6018HS8E#PBF uses the SOIC-8E (exposed pad) package: 8-lead plastic SO with thermally enhanced exposed pad (Pin 9) electrically connected to V–. Pad must be soldered to V– plane or floated; floating degrades thermal performance (θJA rises from 36°C/W to >50°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 8) | Enable control input | Active-high logic: ≥1.7V relative to DGND enables amplifier; ≤0.8V disables. Not high-impedance-requires driven interface. |
| DGND (Pin 1) | Enable reference ground | Must be tied to system ground or V–; defines EN threshold and cannot float. Sets VENL/VENH bounds. |
| +IN (Pin 3) | Noninverting input | High-impedance node (50MΩ); optimized for low thermocouple error via matched layout near –IN. |
| –IN (Pin 2) | Inverting input | Same impedance as +IN; differential input range limited to V–+3V to V+–3V for CMRR integrity. |
| V– (Pin 4) | Negative supply rail | Primary return path; bypass capacitor required close to pin. Exposed pad internally tied to this pin. |
| V+ (Pin 7) | Positive supply rail | Supports up to +33V; requires local bypassing. Supplies internal bias and output stage. |
| OUT (Pin 6) | Amplifier output | Capable of ±20mA sink/source; remains active (not high-Z) in shutdown-leakage may affect downstream nodes. |
| NC (Pin 5) | No connect | Not bonded internally; must remain unconnected on PCB to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow 1/f noise | 30nVP–P (0.1–10Hz): Critical for DC-stable sensor front-ends (e.g., strain gauge, thermopile) where low-frequency drift dominates error budget. |
| Zener-based input protection | Eliminates input clamping diodes: prevents transient-induced bias current spikes (>100µA) that corrupt low-level signals in multiplexed systems. |
| H-grade temperature range | –40°C to 125°C operation: Validated for automotive engine control, industrial motor drives, and downhole instrumentation where ambient exceeds 85°C. |
| Enable-referenced DGND | DGND pin decouples enable logic from supply rails: allows direct interfacing with 3.3V/5V microcontrollers even in ±15V systems without level shifters. |
| Exposed thermal pad | Reduces θJA to 36°C/W: Enables 125°C continuous operation with only 2-layer PCB copper pour-no heatsink required. |
| Low THD | –115dB at 1kHz: Preserves dynamic range in professional audio line drivers and high-fidelity DAC buffers without harmonic contamination. |
Applications
| ADC Driver Applications | Low Noise Precision Signal Processing |
|---|---|
Use Scenario: Driving 18-bit SAR ADC inputs in automated test equipment requiring <1LSB error over temperature. IC Role / Device Role / Timing Role: Precision buffer isolating ADC sample-and-hold from noisy digital sections while maintaining 0.0015% settling accuracy. Use Value: 30nVP–P noise and 30V/µs slew rate ensure full-scale 10V steps settle to 16-bit accuracy in <1.2µs-enabling 1MSPS throughput without averaging. | Use Scenario: Amplifying µV-level outputs from load cells in weigh scales operating from –25°C to 70°C. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with gain = 100, rejecting common-mode noise from long sensor cables. Use Value: 124dB CMRR and ±0.5µV/°C drift limit total error to <0.01% FS across temperature-meeting OIML Class III metrology requirements. |
| Multiplexed Applications | Professional Audio |
Use Scenario: Channel-selection buffer in 16-channel audio mixer with mechanical relays switching between microphone preamps. IC Role / Device Role / Timing Role: Low-distortion unity-gain follower placed after each channel's gain stage to prevent crosstalk during relay bounce. Use Value: Zener input protection avoids 50µA transient currents during relay closure-preventing audible "pops" and preserving SNR >110dB. | Use Scenario: Output stage for studio-grade headphone amplifier delivering 200mW into 32Ω loads. IC Role / Device Role / Timing Role: High-slew, low-THD buffer driving capacitive headphone cables with minimal phase shift. Use Value: –115dB THD at 1kHz and 30V/µs slew rate eliminate intermodulation distortion in complex musical passages-meeting EBU R68 standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA189IDR | Lower 1/f noise (12nVP–P) but higher supply current (1.3mA vs 7.65mA); no enable pin; SOIC-8 (no exposed pad). | Preferred for ultra-low-noise battery-powered portable instruments where shutdown is unnecessary. | Select OPA189IDR when 1/f noise dominates and thermal constraints allow higher quiescent power. |
| ADA4522-1ARZ | Zero-drift architecture (0.005µV/°C drift) but lower GBW (3MHz) and slower slew (1.8V/µs); SOIC-8, no enable. | Better for DC-critical applications like precision weight scales where long-term drift matters more than bandwidth. | Select ADA4522-1ARZ when offset drift <0.01µV/°C is mandatory and signal bandwidth <100kHz suffices. |
Compared with OPA189IDR and ADA4522-1ARZ, LT6018HS8E#PBF uniquely balances ultralow 1/f noise, high slew rate, integrated shutdown, and H-grade thermal robustness-making it optimal for industrial data acquisition where dynamic range, speed, and environmental resilience are jointly critical.
Availability
LT6018HS8E#PBF is available at Aetrix Electronics and suitable for precision data acquisition, industrial sensor interfaces, and automotive engine control units requiring stable component supply across extended temperature ranges.
Supply support for LT6018HS8E#PBF 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
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, acquired Linear Technology in 2017 to strengthen its precision signal chain portfolio.
The LT6018HS8E#PBF belongs to ADI's precision op amp product line, engineered specifically for applications demanding simultaneous low noise, low drift, high CMRR, and robust operation in harsh thermal environments.
FAQ
What is the maximum operating temperature for LT6018HS8E#PBF?
The LT6018HS8E#PBF is specified for continuous operation from –40°C to +125°C ambient temperature. Its SOIC-8E package with exposed pad achieves θJA = 36°C/W when the pad is soldered to V–, allowing reliable operation at 125°C junction temperature with proper PCB thermal design. This H-grade rating exceeds standard industrial (–40°C to 85°C) parts like LT6018IS8E#PBF.
Does LT6018HS8E#PBF have true high-impedance shutdown?
No, LT6018HS8E#PBF does not enter high-impedance shutdown. When disabled (VEN ≤ 0.8V relative to DGND), the output remains actively driven and may conduct leakage current (up to ±10µA at 125°C). This can bias downstream components-e.g., in a unity-gain buffer, VOUT may rise to ~6V due to leakage through input protection diodes. External isolation switches may be needed for true signal disconnection.
How does the DGND pin function in LT6018HS8E#PBF?
The DGND pin (Pin 1) serves as the reference for the EN pin's logic thresholds and must be connected to system ground or V–. It defines VENL (≤0.8V) and VENH (≥1.7V) relative to itself-not to V– or V+. If DGND = 0V, EN requires 0–0.8V (off) or 1.7–15V (on); if DGND = –15V (in ±15V systems), EN requires –15V to –14.2V (off) or –13.3V to 15V (on). DGND cannot float.
Can LT6018HS8E#PBF drive capacitive loads?
Yes, LT6018HS8E#PBF can directly drive up to 100pF in unity-gain configuration without instability. For larger loads (e.g., 500pF), adding a 10–50Ω series resistor between OUT and the load restores phase margin. Its robust output stage maintains stability even with reactive loads common in cable-driven audio or sensor interfaces-verified in Figure 19 of the datasheet.
What is the significance of the exposed pad on LT6018HS8E#PBF?
The exposed pad (Pin 9) on LT6018HS8E#PBF is electrically connected to V– and serves as the primary thermal path. Soldering it to a V– copper pour reduces θJA from >50°C/W (unconnected) to 36°C/W, enabling full 125°C operation without external heatsinking. It must never be used as the sole V– power connection-the dedicated Pin 4 V– lead must carry all supply current to avoid bond-wire overstress.
LT6018HS8E#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 30V/µs
- Gain Bandwidth Product:
- 15 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 150 nA
- Voltage - Input Offset:
- 7 µV
- Current - Supply:
- 7.2mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 8 V
- Voltage - Supply Span (Max):
- 33 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
LT6018HS8E#PBF FAQ
1.How can I place an order for LT6018HS8E#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6018HS8E#PBF 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 LT6018HS8E#PBF reliable?
The price and inventory of LT6018HS8E#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6018HS8E#PBF is usually 5 days.
3.What payment methods are accepted for LT6018HS8E#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6018HS8E#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6018HS8E#PBF?
LT6018HS8E#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6018HS8E#PBF 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 LT6018HS8E#PBF?
For technical support, including LT6018HS8E#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6018HS8E#PBF requirements.
6.How does Aetrix verify that LT6018HS8E#PBF is sourced from the original manufacturer or authorized distributors?
All LT6018HS8E#PBF 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 LT6018HS8E#PBF meets industry standards.
7.What is the process for return or replacement of LT6018HS8E#PBF?
All LT6018HS8E#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6018HS8E#PBF, 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 LT6018HS8E#PBF part is unused and in its original packaging.
Return procedure for LT6018HS8E#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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