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Analog Devices Inc. LTC6241CS8#PBF
- Part No.:
- LTC6241CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC6241CS8#PBF.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,387
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Product details
Overview
LTC6241CS8#PBF from Analog Devices (formerly Linear Technology) is a dual, rail-to-rail output, low-noise CMOS operational amplifier in an 8-pin SO package. It delivers 18MHz gain bandwidth, 10V/μs slew rate, and 550nVP-P (0.1Hz–10Hz) input voltage noise - optimized for high-impedance sensor interfaces and precision signal conditioning. Its 1pA max input bias current and 125μV max offset voltage enable accurate amplification of weak signals in medical instrumentation and photodiode front-ends.
For engineers reviewing the LTC6241CS8#PBF datasheet, LTC6241CS8#PBF pinout, LTC6241CS8#PBF application, or LTC6241CS8#PBF equivalent, key selection criteria include guaranteed 1pA input bias current over temperature, rail-to-rail output swing within 30mV of rails, 2.8V to 6V single-supply operation, and dual-channel matching performance critical for differential signal paths and instrumentation-grade designs.
Technical Context
The LTC6241CS8#PBF employs a complementary CMOS input stage with ultra-low input capacitance (3.5pF differential) and 1012Ω common-mode input resistance, enabling stable operation with high-source-impedance transducers. Its unity-gain-stable architecture supports wideband closed-loop configurations without external compensation.
It features matched channel characteristics - including ≤125μV VOS match and ≥76dB CMRR match - verified across –40°C to 85°C, making it suitable for precision dual-amplifier topologies such as fully differential amplifiers and active filters where inter-channel tracking is essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 18MHz - enables stable closed-loop gain up to 10× at 1.8MHz or unity gain at 18MHz for fast signal acquisition. |
| Input Bias Current | 1pA max (–40°C to 85°C) - preserves signal integrity in >1GΩ source impedance circuits like photodiode or pH electrode interfaces. |
| Input Voltage Noise | 550nVP-P (0.1Hz–10Hz) - minimizes low-frequency drift in DC-coupled precision measurement systems. |
| Offset Voltage | 125μV max (0°C to 70°C) - ensures <0.25% error in 50mV full-scale sensor outputs without trimming. |
| Output Swing | Within 30mV of rails (at 1mA load) - maximizes dynamic range in 3V or 5V supply systems, e.g., battery-powered portable diagnostics. |
| Supply Range | 2.8V to 6V single supply - compatible with Li-ion, USB, and industrial 3.3V/5V rails without level-shifting. |
| Channel Matching | VOS match ≤125μV - supports accurate differential amplification and common-mode rejection in instrumentation amplifier front-ends. |
Pinout & Package
Package: 8-lead plastic SO (Small Outline), 150°C max junction temperature, θJA = 190°C/W. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Inverting amplifier output A - drives loads up to 5mA while maintaining rail-to-rail swing. |
| 2 | –IN A | Inverting input A - high-impedance node (1012Ω) for feedback network connection. |
| 3 | +IN A | Non-inverting input A - accepts common-mode voltages from V– to V+ – 0.3V; extends to negative rail. |
| 4 | V– | Negative supply rail - connects to ground or negative voltage; underside metal pad (in DFN variants) is optional PCB tie. |
| 5 | V+ | Positive supply rail - accepts 2.8V to 6V; decoupling capacitor required near pin for stability. |
| 6 | +IN B | Non-inverting input B - electrically isolated from Channel A; identical specs and matching performance. |
| 7 | –IN B | Inverting input B - used for second independent amplifier or differential pair configuration. |
| 8 | OUT B | Inverting amplifier output B - independently buffered; no crosstalk with Channel A at ≤100kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Swings within 30mV of V+ and V– at 1mA load - preserves >98% of available signal swing in low-voltage systems. |
| Ultra-low input bias current | 1pA max over –40°C to 85°C - eliminates leakage-induced offset in piezoelectric, capacitive, or electrochemical sensors. |
| Low 0.1Hz–10Hz noise | 550nVP-P - reduces baseline wander in ECG, EEG, and strain gauge amplifiers requiring sub-μV DC accuracy. |
| Matched dual-channel performance | ≤125μV VOS match and ≥76dB CMRR match - enables high-common-mode-rejection instrumentation amplifier designs without laser trimming. |
| Unity-gain stable | No external compensation required - simplifies layout and reduces BOM count in gain-of-1 buffer and filter applications. |
| Wide supply range | 2.8V to 6V single supply - supports direct interface with 3.3V microcontrollers and 5V data acquisition systems. |
Applications
| Photodiode Amplifier | Medical Instrumentation |
|---|---|
Use Scenario: Transimpedance amplification of nanoamp-level photocurrent from silicon PIN photodiodes in pulse oximetry modules. IC Role / Device Role / Timing Role: Dual-channel LTC6241CS8#PBF configures one op-amp as TIA and the other as active filter or reference buffer. Use Value: 1pA input bias current prevents photocurrent loss; 550nVP-P noise ensures SNR >80dB for <100nA signals at 1Hz bandwidth. |
Use Scenario: Front-end amplification of low-amplitude biopotential signals (ECG, EMG) in portable patient monitors. IC Role / Device Role / Timing Role: Precision dual op-amp provides simultaneous differential gain and right-leg drive (RLD) buffering. Use Value: Matched VOS ≤125μV and CMRR ≥76dB minimize common-mode interference; rail-to-rail output drives 12-bit SAR ADC inputs directly. |
| High-Impedance Transducer Interface | Low-Noise Signal Processing |
Use Scenario: Amplification of mV-level outputs from pH electrodes, ion-selective sensors, or MEMS accelerometers with GΩ-level source impedances. IC Role / Device Role / Timing Role: First-stage amplifier in multi-stage signal chain; configured as non-inverting gain-of-100 with guard ring layout. Use Value: 1012Ω input resistance and 3.5pF input capacitance prevent signal attenuation and phase shift at sensor resonance frequencies. |
Use Scenario: Post-processing stage in spectrum analyzers and audio test equipment requiring flat noise floor up to 10MHz. IC Role / Device Role / Timing Role: Final gain stage before ADC sampling; driven by programmable gain amplifier (PGA) output. Use Value: 18MHz GBW and 10V/μs slew rate support clean 5VP-P signals at 1MHz; 7nV/√Hz broadband noise maintains ENOB >10 bits. |
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 | Lower 1/f noise (200nVP-P), higher supply current (1.3mA/ch), ±18V max supply | Better for ultra-low-drift DC applications; less suitable for 3V battery operation due to 4.5V min supply | Select when sub-100nVP-P 0.1–10Hz noise is mandatory and supply headroom allows ≥4.5V. |
| ADA4898-2ARMZ | Higher slew rate (25V/μs), wider GBW (29MHz), but 2.5pA input bias current and 1.2mA supply current | Better for high-speed active filters and composite amplifiers; higher bias current limits use with >100MΩ sources | Select when bandwidth >20MHz and settling time <50ns are required, and source impedance is ≤10MΩ. |
Compared with OPA2189IDR and ADA4898-2ARMZ, the LTC6241CS8#PBF uniquely balances ultra-low input bias current (1pA), low 0.1–10Hz noise (550nVP-P), and 3V compatibility - making it optimal for battery-powered, high-impedance, precision analog front-ends where leakage and low-frequency drift dominate error budgets.
Availability
LTC6241CS8#PBF is available at Aetrix Electronics and suitable for photodiode amplification, medical biopotential sensing, and high-impedance transducer interfacing requiring stable component supply across industrial and healthcare OEM programs.
Supply support for LTC6241CS8#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors for precision measurement, industrial automation, and communications infrastructure.
The LTC6241 belongs to Linear Technology's precision low-noise op amp family, designed specifically for applications demanding ultra-low input bias current, sub-microvolt offset, and rail-to-rail output swing in space-constrained, low-power systems.
FAQ
What is the maximum input bias current specification for LTC6241CS8#PBF over temperature?
The LTC6241CS8#PBF guarantees a maximum input bias current of 1pA over the full operating temperature range of –40°C to 85°C, as specified in the Electrical Characteristics table for the C/I grade. This value is measured and tested per Linear Technology's production test flow and applies to both channels under typical 5V supply conditions.
Can LTC6241CS8#PBF operate from a single 3V supply?
Yes, the LTC6241CS8#PBF is fully specified for single-supply operation from 2.8V to 6V. At 3V supply, it maintains rail-to-rail output swing (within 30mV of rails at 1mA), 125μV max input offset, and 18MHz gain bandwidth - confirmed in the 3V electrical characteristics tables on pages 7 and 11 of the datasheet.
Does LTC6241CS8#PBF require external compensation for unity-gain stability?
No, the LTC6241CS8#PBF is internally compensated for unity-gain stability. It drives capacitive loads up to 5pF without oscillation and supports standard gain configurations (e.g., inverting, non-inverting, differential) without added compensation components - verified across temperature and supply voltage ranges in the Typical Performance Characteristics section.
What is the input common-mode voltage range for LTC6241CS8#PBF at 5V supply?
At 5V single supply (V+ = 5V, V– = 0V), the LTC6241CS8#PBF supports an input common-mode voltage range from 0V (negative rail) to 3.5V, as guaranteed by CMRR performance. This allows direct interfacing with sensors referenced to ground or mid-supply without level-shifting circuitry.
How does channel-to-channel offset matching perform in LTC6241CS8#PBF?
The LTC6241CS8#PBF specifies a maximum VOS match of 125μV over the 0°C to 70°C temperature range, meaning the difference between Channel A and Channel B offset voltages stays within ±125μV. This matching is critical for differential amplification and is validated across production lots per the distribution plots on page 14 of the datasheet.
LTC6241CS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LTC6241CS8#PBF FAQ
1.How can I place an order for LTC6241CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6241CS8#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 LTC6241CS8#PBF reliable?
The price and inventory of LTC6241CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6241CS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC6241CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6241CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6241CS8#PBF?
LTC6241CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6241CS8#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 LTC6241CS8#PBF?
For technical support, including LTC6241CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6241CS8#PBF requirements.
6.How does Aetrix verify that LTC6241CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6241CS8#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 LTC6241CS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC6241CS8#PBF?
All LTC6241CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6241CS8#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 LTC6241CS8#PBF part is unused and in its original packaging.
Return procedure for LTC6241CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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