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Analog Devices Inc. LTC6241IS8#PBF
- Part No.:
- LTC6241IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC6241IS8#PBF.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,918
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Product details
Overview
LTC6241IS8#PBF from Analog Devices (formerly Linear Technology) is a dual, rail-to-rail output, low-noise CMOS operational amplifier optimized for precision signal conditioning in space-constrained industrial and medical systems. It delivers 18MHz gain bandwidth, 10V/μs slew rate, 550nVP-P 0.1Hz–10Hz noise, 125μV max input offset voltage, and 1pA max input bias current across –40°C to +85°C. It operates from 2.8V to 6V single supply or ±2.5V dual supply.
For engineers reviewing the LTC6241IS8#PBF datasheet, LTC6241IS8#PBF pinout, LTC6241IS8#PBF application, or LTC6241IS8#PBF equivalent, key selection criteria include ultra-low input bias current for high-impedance sensor interfaces, guaranteed rail-to-rail output swing within 30mV of rails, low 1kHz noise density (7–10nV/√Hz), and SO-8 package compatibility with PCB guard ring layouts.
Technical Context
The LTC6241IS8#PBF implements a complementary CMOS input stage with 1012Ω input resistance and 3.5pF differential input capacitance, enabling stable operation with photodiode and piezoelectric transducers. Its unity-gain-stable architecture supports closed-loop configurations down to gain = +1 without external compensation.
It features matched dual amplifiers with ≤160μV channel-to-channel VOS match and ≥76dB CMRR match over temperature, supporting differential signal processing and instrumentation-grade rejection of common-mode interference in 3V/5V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 18MHz - enables stable closed-loop operation up to 1MHz at gain = 18, suitable for anti-aliasing and active filter stages. |
| Input Offset Voltage | 125μV max (–40°C to +85°C) - ensures <0.025% error in 0.5V full-scale 16-bit ADC front-ends without trimming. |
| Input Bias Current | 1pA max (–40°C to +85°C) - preserves signal integrity in >1GΩ source impedance applications like pH electrodes and photodiode amps. |
| 0.1Hz–10Hz Noise | 550nVP-P - minimizes baseline drift in DC-coupled medical sensors and precision weigh scales. |
| Output Swing | Within 30mV of rails at 1mA load - maximizes dynamic range in low-voltage (3V) battery-powered systems. |
| Supply Range | 2.8V to 6V single supply - supports direct interface with Li-ion (3.0–4.2V) and USB-powered (5V) designs. |
| Slew Rate | 10V/μs - supports 1VP-P signals up to ~1.6MHz without slewing distortion in fast-settling data acquisition paths. |
Pinout & Package
Package: 8-lead plastic SO (SO-8), 5.0mm × 4.0mm body, 1.27mm pitch, RoHS-compliant lead-free finish. Thermal resistance θJA = 190°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT A | Amplifier A output | Capable of sourcing/sinking 5mA while maintaining rail-to-rail swing; requires local 0.1μF bypass capacitor. |
| 2 - –IN A | Inverting input A | High-impedance node; sensitive to PCB leakage-requires guard ring tied to V– or reference potential. |
| 3 - +IN A | Non-inverting input A | Matches –IN A in offset and bias current; used for unity-gain buffers or non-inverting amplifiers. |
| 4 - V– | Negative supply | Ground reference for single-supply operation; undershoot tolerance to –0.3V allows transient margin. |
| 5 - V+ | Positive supply | Accepts 2.8V–6V; overshoot tolerance to V+ + 0.3V protects against supply transients. |
| 6 - +IN B | Non-inverting input B | Electrically isolated from Channel A; enables independent dual-path signal conditioning on one die. |
| 7 - –IN B | Inverting input B | Matched to –IN A for differential pair use; supports common-mode rejection in instrumentation topologies. |
| 8 - OUT B | Amplifier B output | Functionally identical to OUT A; allows dual-channel filtering, I/V conversion, or signal splitting. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Swings to within 30mV of V+ and V– at 1mA load-preserves >98% of available voltage headroom in 3V systems. |
| Ultra-low input bias current | 1pA max over –40°C to +85°C-enables stable biasing of >10GΩ sources without significant voltage error. |
| Low 0.1Hz–10Hz noise | 550nVP-P-reduces low-frequency drift in DC-coupled biosensors and strain gauge bridges. |
| Channel matching | ≤160μV VOS match and ≥76dB CMRR match-supports accurate differential amplification without calibration. |
| Unity-gain stability | No external compensation required-simplifies layout and reduces component count in gain = +1 buffer applications. |
| Wide supply range | Operates from 2.8V to 6V-eliminates need for LDO regulation in battery-powered portable instruments. |
Applications
| Photodiode Amplifier | Medical ECG Front-End |
|---|---|
Use Scenario: High-gain transimpedance amplifier for silicon photodiodes in pulse oximetry. IC Role / Device Role / Timing Role: Converts photocurrent to voltage with minimal dark-current error and Johnson noise contribution. Use Value: 1pA input bias current prevents diode reverse-leakage saturation; 550nVP-P noise ensures >80dB SNR in 1Hz bandwidth. |
Use Scenario: First-stage instrumentation amplifier input buffer in portable ECG monitors. IC Role / Device Role / Timing Role: Provides high-Z, low-noise buffering before differential ADC sampling at 1kSPS. Use Value: Rail-to-rail output swing maintains full 3V ADC range; 125μV VOS limits baseline error to <0.04% of 3V FS. |
| High-Impedance pH Sensor Interface | Low-Voltage Data Acquisition Channel |
Use Scenario: Buffering glass electrode outputs (100MΩ–1GΩ source impedance) in handheld pH meters. IC Role / Device Role / Timing Role: Isolates high-Z electrode from cable capacitance and ADC input loading. Use Value: 1pA bias current avoids >100mV offset error at 100MΩ; 3.5pF input capacitance minimizes phase shift at 10Hz. |
Use Scenario: Signal conditioning stage in battery-powered IoT sensor nodes with 16-bit SAR ADCs. IC Role / Device Role / Timing Role: Scales and filters analog sensor outputs prior to digitization at 100kSPS. Use Value: 18MHz GBW supports 10x oversampling filters; 2.4mA supply current enables >1-year coin-cell life at 100μA avg. |
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), no guaranteed 1pA IB spec. | Better for sub-10Hz EEG; less suitable for >1GΩ photodiode or pH electrodes due to higher bias current. | Choose when ultra-low 0.1–10Hz noise dominates design priority over input bias current. |
| AD8602ARZ-REEL7 | Higher input offset (250μV max), lower GBW (9.5MHz), same SO-8 package and 1pA IB spec. | Acceptable for cost-sensitive industrial sensors where 18MHz bandwidth is unnecessary. | Choose when budget constraints outweigh need for high-speed settling or wideband filtering. |
Compared with OPA2189IDR and AD8602ARZ-REEL7, LTC6241IS8#PBF uniquely balances 1pA input bias current, 18MHz bandwidth, and 550nVP-P low-frequency noise in an industry-standard SO-8 package-making it optimal for dual-channel, high-impedance, wideband precision signal chains.
Availability
LTC6241IS8#PBF is available at Aetrix Electronics and suitable for medical instrumentation, portable test equipment, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for LTC6241IS8#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 acquired Linear Technology in 2017 and maintains its precision analog portfolio with rigorous automotive and industrial qualification standards.
The LTC6241 belongs to Linear's ultra-low-input-bias, low-noise op amp family designed specifically for high-impedance sensor interfacing, medical diagnostics, and battery-powered precision measurement systems.
FAQ
What is the maximum operating temperature range for the LTC6241IS8#PBF?
The LTC6241IS8#PBF is specified for operation from –40°C to +85°C, with all electrical parameters guaranteed across this full industrial temperature range. The 'I' grade designation confirms extended-temperature qualification, distinct from commercial-grade 'C' versions limited to 0°C–70°C.
Does the LTC6241IS8#PBF support true rail-to-rail input common-mode range?
No-the LTC6241IS8#PBF features rail-to-rail *output* swing but only extends its input common-mode range to the negative rail (V–). At 5V supply, VCM is guaranteed from 0V to 3.5V, not up to V+. This allows use with ground-referenced sensors but requires level-shifting for inputs near V+.
Can the LTC6241IS8#PBF drive a 1000pF capacitive load directly?
No-capacitive loads >100pF may cause instability in the LTC6241IS8#PBF due to phase margin reduction. For 1000pF loads, a series isolation resistor (≥200Ω) between the output and capacitor is required, or a dedicated driver buffer should be used to maintain stability and settling performance.
Is the LTC6241IS8#PBF pin-compatible with other SO-8 dual op amps like the LM358?
No-LTC6241IS8#PBF uses a non-standard SO-8 pinout: Pin 1 = OUT A, Pin 2 = –IN A, Pin 3 = +IN A, Pin 4 = V–, Pin 5 = V+, Pin 6 = +IN B, Pin 7 = –IN B, Pin 8 = OUT B. This differs from LM358 (Pin 1 = OUT A, Pin 2 = –IN A, Pin 3 = +IN A, Pin 4 = V–, Pin 5 = +IN B, Pin 6 = –IN B, Pin 7 = OUT B, Pin 8 = V+), making direct replacement impossible without PCB revision.
What is the typical supply current per amplifier for the LTC6241IS8#PBF at 5V?
The typical supply current per amplifier for the LTC6241IS8#PBF is 2.2mA at 5V and 25°C, rising to 2.4mA maximum across –40°C to +85°C. This value is confirmed in the Electrical Characteristics table under "IS Supply Current per Amplifier" for LTC6241 C/I grades at VS = 5V.
LTC6241IS8#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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LTC6241IS8#PBF FAQ
1.How can I place an order for LTC6241IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6241IS8#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 LTC6241IS8#PBF reliable?
The price and inventory of LTC6241IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6241IS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC6241IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6241IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6241IS8#PBF?
LTC6241IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6241IS8#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 LTC6241IS8#PBF?
For technical support, including LTC6241IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6241IS8#PBF requirements.
6.How does Aetrix verify that LTC6241IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6241IS8#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 LTC6241IS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC6241IS8#PBF?
All LTC6241IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6241IS8#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 LTC6241IS8#PBF part is unused and in its original packaging.
Return procedure for LTC6241IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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