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Analog Devices Inc. LTC6241IS8#TRPBF
- Part No.:
- LTC6241IS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC6241IS8#TRPBF.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,520
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Product details
Overview
LTC6241IS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual, rail-to-rail output, low-noise CMOS operational amplifier in an 8-pin SO package, featuring 18MHz gain bandwidth, 10V/μs slew rate, and 125μV max input offset voltage at –40°C to 85°C. It delivers 550nVP-P 0.1Hz–10Hz noise and 7nV/√Hz input voltage noise density at 1kHz, enabling precision signal conditioning in high-impedance sensor interfaces.
For engineers reviewing the LTC6241IS8#TRPBF datasheet, LTC6241IS8#TRPBF pinout, LTC6241IS8#TRPBF application, or LTC6241IS8#TRPBF equivalent, key selection criteria include guaranteed 1pA max input bias current over temperature, rail-to-rail output swing within 30mV of rails, channel-to-channel VOS match ≤160μV, and operation from 2.8V to 6V single supply or ±2.5V dual supply.
Technical Context
The LTC6241IS8#TRPBF employs a unity-gain-stable CMOS input stage with 1012Ω input resistance and 3.5pF differential input capacitance, optimized for low-frequency precision and high-Z source driving. Its output stage uses complementary common-emitter architecture to achieve rail-to-rail swing while maintaining 10V/μs slew rate and 18MHz GBW under 1kΩ load.
It operates across –40°C to 85°C with guaranteed performance including 125μV max VOS, 2.5μV/°C max TCVOS, and 80dB min PSRR and CMRR over 0–3.5V common-mode range. Channel matching (VOS, CMRR, PSRR) is specified for dual-amplifier correlation in instrumentation topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 18MHz - supports stable closed-loop gain ≥10 at 1.8MHz or ≥2 at 9MHz for anti-aliasing or active filtering. |
| Input Offset Voltage | 125μV max (–40°C to 85°C) - enables sub-1mV error in 10V full-scale 12-bit systems without trimming. |
| 0.1Hz–10Hz Noise | 550nVP-P - critical for DC-coupled medical sensors and strain gauge bridges requiring low-frequency stability. |
| Input Bias Current | 1pA max (–40°C to 85°C) - preserves signal integrity in photodiode, pH probe, and piezoelectric transducer front-ends. |
| Output Swing | Within 30mV of rails at 1mA - maximizes dynamic range in 3V or 5V supply battery-powered data loggers. |
| Supply Range | 2.8V to 6V single or ±2.5V dual - compatible with Li-ion, USB, and industrial 3.3V/5V rails without level-shifting. |
| Slew Rate | 10V/μs - ensures <1.1μs settling to 0.1% for 2V step, suitable for multiplexed ADC driver applications. |
Pinout & Package
Package: 8-pin plastic SO (Small Outline), 150°C max junction temperature, θJA = 190°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads up to 10mA; rail-to-rail swing enables full utilization of ADC reference. |
| 2 | –IN A | Inverting input of Amp A - high-impedance node; guard ring layout recommended for leakage-sensitive designs. |
| 3 | +IN A | Non-inverting input of Amp A - matched to Pin 2 for common-mode rejection in differential configurations. |
| 4 | V– | Negative supply rail - connects to ground (single supply) or negative rail (dual supply); undersurface pad optional for thermal relief. |
| 5 | V+ | Positive supply rail - decoupling capacitor required within 1cm for stability at 18MHz GBW. |
| 6 | +IN B | Non-inverting input of Amp B - electrically isolated from Amp A; enables independent sensor channels on one die. |
| 7 | –IN B | Inverting input of Amp B - matches Pin 6 for channel-to-channel tracking in dual instrumentation amplifiers. |
| 8 | OUT B | Amplifier B output - identical AC/DC specs to Pin 1; supports dual-channel simultaneous sampling. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers >99% of supply voltage range at 1mA load, preserving SNR in low-voltage 12-bit+ data acquisition. |
| Ultra-low input bias current | 1pA max over –40°C to 85°C enables direct connection to >1GΩ sources without significant DC error. |
| Low 1/f noise | 550nVP-P 0.1Hz–10Hz allows stable DC measurements in weigh scales and thermopile amplifiers. |
| Guaranteed channel matching | VOS match ≤160μV ensures <0.016% gain error in dual-opamp I/V converters for differential photodiode arrays. |
| Unity-gain stable | Operates unconditionally stable at gain = 1, eliminating need for external compensation in buffer or follower configurations. |
Applications
| Photodiode Amplifier | Medical ECG Front-End |
|---|---|
Use Scenario: Converting weak current from silicon photodiode (10pA–10nA) into measurable voltage with minimal dark-current error. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with feedback resistor up to 100MΩ, leveraging 1pA input bias and 3.5pF input capacitance for stability. Use Value: Enables detection of sub-nA photocurrents without guard-ring PCB complexity or active bias cancellation circuitry. | Use Scenario: Amplifying microvolt-level cardiac signals (0.5–5mV) in portable ECG monitors with >100dB CMRR requirement. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer, providing high-Z, low-noise, and matched input pairs for common-mode rejection. Use Value: Achieves 105dB CMRR and 550nVP-P low-frequency noise, meeting AHA-recommended baseline wander limits without digital post-processing. |
| High-Impedance pH Probe Interface | Strain Gauge Signal Conditioning |
Use Scenario: Reading mV-level output from glass electrode pH probes (100MΩ–1GΩ source impedance) in handheld analyzers. IC Role / Device Role / Timing Role: Unity-gain buffer isolating probe from ADC input, using ultra-low IB to prevent electrode polarization drift. Use Value: Maintains <1mV measurement error over 24h due to <1pA bias current, eliminating frequent recalibration in field-deployed units. | Use Scenario: Amplifying Wheatstone bridge outputs (1–10mV full-scale) from metal foil strain gauges in structural health monitoring. IC Role / Device Role / Timing Role: Precision differential amplifier with matched VOS and TCVOS to reject thermal gradients across dual op-amps. Use Value: Delivers <0.02% nonlinearity over –20°C to 70°C via 2.5μV/°C max offset drift and 160μV channel match. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189IDR | Zero-drift architecture; 0.003μV/°C TCVOS, but 5.2nV/√Hz noise (vs. 7nV/√Hz) and 20MHz GBW. | Better DC accuracy over temperature; higher noise limits use in low-frequency sensor apps below 10kHz. | Select OPA2189IDR when long-term DC stability dominates over low-frequency noise floor. |
| AD8622ARZ | FET input; 1pA max IB same, but 12MHz GBW, 5.5V/μs slew, and 650nVP-P 0.1–10Hz noise. | Lower bandwidth and higher 1/f noise reduce suitability for fast-sampling or high-resolution DC apps. | Select AD8622ARZ only if cost sensitivity outweighs need for 18MHz GBW and lowest 0.1–10Hz noise. |
Compared with OPA2189IDR and AD8622ARZ, the LTC6241IS8#TRPBF offers superior 0.1–10Hz noise performance and higher slew rate, making it optimal for precision DC-coupled applications where both low-frequency stability and moderate speed are required-without zero-drift chopper artifacts.
Availability
LTC6241IS8#TRPBF is available at Aetrix Electronics and suitable for photodiode amplification, portable medical instrumentation, and high-impedance sensor signal conditioning requiring stable component supply across industrial and medical product lifecycles.
Supply support for LTC6241IS8#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC6241 belongs to ADI's legacy Linear Technology precision op amp family, engineered for ultra-low input bias current and low 1/f noise in demanding sensor interface and instrumentation applications.
FAQ
What is the maximum guaranteed input bias current for LTC6241IS8#TRPBF over its full operating temperature range?
The LTC6241IS8#TRPBF guarantees ≤1pA maximum input bias current across its specified –40°C to 85°C operating temperature range, as confirmed in the Electrical Characteristics table for LTC6241 S8 packages under "IB Input Bias Current" with "l" notation indicating full-range specification. This value applies to both amplifiers in the dual configuration and is critical for high-impedance transducer interfacing.
Does LTC6241IS8#TRPBF support true rail-to-rail output swing, and what is the worst-case voltage drop at rated load?
Yes, the LTC6241IS8#TRPBF provides rail-to-rail output swing with worst-case saturation voltages of ≤30mV above V– and ≤30mV below V+ at 1mA load, per the "VOL" and "VOH" specifications in the Electrical Characteristics tables. At 5mA load, the drop increases to ≤190mV - verified under –40°C to 85°C conditions with 5V supply, ensuring usable dynamic range in 3.3V and 5V systems.
What is the minimum supply voltage required for functional operation of LTC6241IS8#TRPBF, and is it specified over temperature?
The LTC6241IS8#TRPBF requires a minimum total supply voltage of 2.8V, guaranteed over its full –40°C to 85°C operating range (denoted by "l" in datasheet tables). This allows reliable operation from single-cell Li-ion (3.0V min) or regulated 3.3V rails without brownout risk, and is validated by PSRR testing per Note 10 in the datasheet.
How does the 0.1Hz–10Hz noise specification of LTC6241IS8#TRPBF impact its suitability for DC-coupled sensor applications?
The 550nVP-P 0.1Hz–10Hz noise of LTC6241IS8#TRPBF directly determines baseline stability in DC-coupled applications like pH meters and thermopile detectors. This low 1/f noise floor ensures <1μV peak-to-peak drift over 10 seconds, enabling accurate sub-millivolt measurements without AC coupling or software averaging - a key differentiator versus higher-noise general-purpose op amps.
Is LTC6241IS8#TRPBF unity-gain stable, and what evidence confirms this in the datasheet?
Yes, the LTC6241IS8#TRPBF is explicitly specified as unity-gain stable in the product description ("unity gain stable CMOS op amps") and confirmed by phase margin >60° at 18MHz GBW in Figure G13 (Gain Bandwidth and Phase Margin vs Temperature) under 1kΩ load and 5pF capacitive load. No external compensation is required for gain ≥1 configurations, simplifying TIA and buffer designs.
LTC6241IS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 18 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 2.5mA (x2 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.8 V
- Voltage - Supply Span (Max):
- 6 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LTC6241IS8#TRPBF FAQ
1.How can I place an order for LTC6241IS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6241IS8#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 LTC6241IS8#TRPBF reliable?
The price and inventory of LTC6241IS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6241IS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6241IS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6241IS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6241IS8#TRPBF?
LTC6241IS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6241IS8#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 LTC6241IS8#TRPBF?
For technical support, including LTC6241IS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6241IS8#TRPBF requirements.
6.How does Aetrix verify that LTC6241IS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6241IS8#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 LTC6241IS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6241IS8#TRPBF?
All LTC6241IS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6241IS8#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 LTC6241IS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC6241IS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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