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Analog Devices Inc. LTC6081IMS8#TRPBF
- Part No.:
- LTC6081IMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC6081IMS8#TRPBF.pdf
- Description:
- IC CMOS 2 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,790
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Product details
Overview
LTC6081IMS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual, precision CMOS rail-to-rail input/output operational amplifier optimized for microvolt-level signal conditioning in high-impedance sensor interfaces. It delivers 70 µV max offset voltage, 0.8 µV/°C max offset drift, 1 pA max input bias current at ≤85°C, 1.3 µVP-P 0.1Hz–10Hz noise, and 120 dB open-loop gain - enabling accurate amplification of thermocouple, strain gauge, and photodiode outputs in industrial instrumentation.
For engineers reviewing the LTC6081IMS8#TRPBF datasheet, LTC6081IMS8#TRPBF pinout, LTC6081IMS8#TRPBF application, or LTC6081IMS8#TRPBF equivalent, this page provides verified package mapping (8-lead MSOP), validated dual-amplifier circuit role, confirmed –40°C to 85°C operating range, and two field-tested alternative op-amps with documented performance trade-offs in precision DC-coupled designs.
Technical Context
The LTC6081IMS8#TRPBF integrates complementary PMOS/NMOS input stages to achieve true rail-to-rail common-mode input range (V– to V+) and output swing (within 1 mV of rails at light load). Its 3.6 MHz gain-bandwidth product and unity-gain stability support precision closed-loop configurations without external compensation.
Each amplifier consumes only 330 µA supply current at 3 V, with independent shutdown capability absent in the MS8 package (unlike the DFN variant). The device maintains ≥95 dB CMRR over 0–3.5 V common-mode range and ≥98 dB PSRR across 2.7–5.5 V supply, ensuring robustness against power rail noise and ground shifts in mixed-signal systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 70 µV max at 25°C - enables sub-millivolt accuracy in DC-coupled sensor front-ends without trimming |
| Offset Drift | 0.8 µV/°C max - limits thermal-induced error to <6 µV over 75°C ambient shift |
| Input Bias Current | 1 pA max at TA ≤ 85°C - preserves gain accuracy with >1 GΩ feedback networks |
| 0.1Hz–10Hz Noise | 1.3 µVP-P - supports resolution of <1 µV signals in low-frequency measurement systems |
| Supply Range | 2.7 V to 5.5 V - compatible with single Li-ion, 3.3 V, and 5 V logic-supply domains |
| CMRR | 100 dB min - rejects common-mode interference from noisy PCB traces or shared grounds |
| PSRR | 98 dB min - suppresses ripple and switching noise from adjacent DC/DC converters |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3.00 mm × 3.00 mm footprint, exposed pad connected to V–.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Amplifier A output - drives loads up to 5 mA sink/source while maintaining rail-to-rail swing |
| 2 | –INA | Inverting input of Amplifier A - high-impedance node requiring guard ring layout for leakage control |
| 3 | +INA | Noninverting input of Amplifier A - accepts input common-mode voltages from V– to V+ |
| 4 | V– | Negative supply rail - also connects to exposed thermal pad for improved heat dissipation |
| 5 | V+ | Positive supply rail - decoupling capacitor required within 1 cm for PSRR optimization |
| 6 | OUTB | Amplifier B output - electrically isolated from OUTA; channel separation >120 dB at 10 kHz |
| 7 | –INB | Inverting input of Amplifier B - independent of Amplifier A; no crosstalk in dual-channel designs |
| 8 | +INB | Noninverting input of Amplifier B - supports differential sensing when paired with +INA/–INA |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Input range extends to both supply rails; output swings within 1 mV of V+ and V– at 0.5 mA load |
| Ultra-low input bias | 1 pA max ensures <0.05°C error in K-type thermocouple amplifiers using 1 MΩ gain resistors |
| Low 1/f noise | 1.3 µVP-P 0.1Hz–10Hz enables stable microvolt threshold detection in slow-scan applications |
| High DC precision | 120 dB open-loop gain and 100 dB CMRR maintain gain accuracy to 0.001% in 100× closed-loop configurations |
| Wide supply range | 2.7 V to 5.5 V operation allows direct interface with ADCs, microcontrollers, and battery-powered sensors |
Applications
| Thermocouple Amplifier | Strain Gauge Interface |
|---|---|
Use Scenario: Amplifying low-level mV outputs from K-type thermocouples across –40°C to 500°C industrial temperature ranges. IC Role / Device Role / Timing Role: Precision DC-coupled first-stage amplifier with cold-junction compensation reference buffering. Use Value: 1 pA input bias contributes <0.05°C error; 70 µV offset translates to <0.5°C system offset before calibration. | Use Scenario: Conditioning Wheatstone bridge outputs from metal foil or semiconductor strain gauges in load cells and pressure transducers. IC Role / Device Role / Timing Role: Low-noise, high-input-impedance buffer and gain stage for ratiometric bridge excitation schemes. Use Value: 1.3 µVP-P noise enables resolution of <10 µε mechanical strain; rail-to-rail output maximizes ADC dynamic range. |
| Photodiode Transimpedance | Microvolt Threshold Detector |
Use Scenario: Converting nanoamp photocurrents from UV/VIS photodiodes into measurable voltage signals in spectrophotometers. IC Role / Device Role / Timing Role: Low-bias-current transimpedance amplifier with guarded input and stable 3.6 MHz bandwidth. Use Value: 1 pA input bias prevents signal corruption in 1 GΩ feedback designs; 120 dB AVOL ensures gain accuracy >99.99%. | Use Scenario: Detecting sub-millivolt fault conditions in medical ECG front-ends or battery cell monitoring circuits. IC Role / Device Role / Timing Role: High-precision comparator driver with hysteresis control and low-drift reference buffering. Use Value: 0.8 µV/°C drift limits threshold drift to ±6 µV over full operating range; 70 µV offset sets absolute detection floor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2051IMS8#TRPBF | Zero-drift architecture; 0.5 µV max offset, 0.015 µV/°C drift; higher 1.5 µVP-P noise; 1.1 mA supply current per amp | Better DC accuracy but higher noise and power - suited for ultra-stable DC gain, not low-frequency signal integrity | Select when offset drift dominates error budget; avoid if 0.1–10 Hz noise or battery life is critical |
| LTC6078IMS8#TRPBF | Lower power (170 µA/amp); same 70 µV offset; 1.5 µVP-P noise; 1.5 MHz GBW; no shutdown | Reduced bandwidth and higher noise - appropriate for lower-speed, power-constrained sensor nodes | Select when supply current <200 µA is mandatory and 3.6 MHz GBW is unnecessary |
Compared with LTC2051IMS8#TRPBF, LTC6081IMS8#TRPBF trades zero-drift stability for lower noise and 40% less supply current; compared with LTC6078IMS8#TRPBF, it delivers 2.4× higher bandwidth and 15% lower noise at only 1.9× the quiescent power - making it optimal for precision, medium-speed analog front-ends.
Availability
LTC6081IMS8#TRPBF is available at Aetrix Electronics and suitable for industrial instrumentation, medical sensor interfaces, and test-and-measurement equipment requiring stable component supply, long-term lifecycle support, and guaranteed –40°C to 85°C operation.
Supply support for LTC6081IMS8#TRPBF 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 acquired Linear Technology in 2017 and maintains its legacy of high-performance analog ICs for precision signal conditioning, power management, and data conversion.
The LTC6081IMS8#TRPBF belongs to Linear's precision op-amp product line, engineered specifically for DC-accurate, low-noise amplification in high-impedance sensor signal chains where microvolt-level errors must be minimized.
FAQ
What is the maximum operating temperature range for the LTC6081IMS8#TRPBF?
The LTC6081IMS8#TRPBF is specified for operation from –40°C to +85°C, with electrical performance guaranteed across this full industrial temperature range. Its offset voltage drift is limited to 0.8 µV/°C max, and supply current remains stable at 330 µA per amplifier at 3 V over temperature - making LTC6081IMS8#TRPBF suitable for uncooled industrial environments.
Does the LTC6081IMS8#TRPBF support rail-to-rail input and output operation?
Yes, the LTC6081IMS8#TRPBF features true rail-to-rail input and output operation. Its input common-mode range extends from V– to V+, and its output swings to within 1 mV of either rail under light load conditions. This capability is enabled by a composite PMOS/NMOS input stage and push-pull output stage - critical for maximizing dynamic range in single-supply systems using LTC6081IMS8#TRPBF.
What is the input bias current specification for the LTC6081IMS8#TRPBF at 85°C?
The LTC6081IMS8#TRPBF guarantees a maximum input bias current of 40 pA at temperatures ≤85°C, with typical values near 0.2 pA at 25°C. This ultra-low bias enables high-accuracy amplification with megaohm-level source impedances - for example, contributing only 0.05°C error in K-type thermocouple circuits using 1 MΩ gain resistors. The specification is explicitly confirmed in the Electrical Characteristics table for the I-grade (LTC6081I) MS8 package.
Is the LTC6081IMS8#TRPBF pin-compatible with other packages in the LTC6081 family?
No, the LTC6081IMS8#TRPBF (8-lead MSOP) is not pin-compatible with the LTC6081DD variants (10-lead DFN), which include dedicated SHDN_A/SHDN_B pins. The MS8 package has no shutdown functionality and uses a different pinout: pins 1–4 and 5–8 map exclusively to OUTA/–INA/+INA/V– and V+/OUTB/–INB/+INB respectively. Substituting LTC6081IMS8#TRPBF for a DFN version requires PCB layout revision.
What is the gain-bandwidth product of the LTC6081IMS8#TRPBF and how does it affect stability?
The LTC6081IMS8#TRPBF has a guaranteed minimum gain-bandwidth product of 2.5 MHz and a typical value of 3.6 MHz. It is unity-gain stable, meaning it can be configured with closed-loop gains ≥1 without external compensation. Phase margin exceeds 70° at 10 kΩ load, supporting robust transient response in precision instrumentation circuits using LTC6081IMS8#TRPBF - including thermocouple amplifiers and strain gauge buffers.
LTC6081IMS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- 3.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 90 µV
- Current - Supply:
- 330µA (x2 Channels)
- Current - Output / Channel:
- 24 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LTC6081IMS8#TRPBF FAQ
1.How can I place an order for LTC6081IMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6081IMS8#TRPBF 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 LTC6081IMS8#TRPBF reliable?
The price and inventory of LTC6081IMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6081IMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6081IMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6081IMS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6081IMS8#TRPBF?
LTC6081IMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6081IMS8#TRPBF 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 LTC6081IMS8#TRPBF?
For technical support, including LTC6081IMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6081IMS8#TRPBF requirements.
6.How does Aetrix verify that LTC6081IMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6081IMS8#TRPBF 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 LTC6081IMS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6081IMS8#TRPBF?
All LTC6081IMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6081IMS8#TRPBF, 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 LTC6081IMS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC6081IMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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