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Analog Devices Inc. LTC6241IDD#PBF
- Part No.:
- LTC6241IDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC6241IDD#PBF.pdf
- Description:
- IC CMOS 2 CIRCUIT 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,757
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Product details
Overview
LTC6241IDD#PBF from Analog Devices (formerly Linear Technology) is a dual, rail-to-rail output, low-noise CMOS operational amplifier optimized for high-impedance sensor interfacing and precision signal conditioning. It delivers 18MHz gain bandwidth, 10V/μs slew rate, 550nVP-P 0.1Hz–10Hz noise, 125μV max input offset voltage, and 0.2pA typical input bias current at 25°C - enabling accurate amplification of weak signals in medical instrumentation and photodiode front-ends.
For engineers reviewing the LTC6241IDD#PBF datasheet, LTC6241IDD#PBF pinout, LTC6241IDD#PBF application, or LTC6241IDD#PBF equivalent, key selection criteria include its guaranteed 1pA max input bias current over temperature, rail-to-rail output swing within 30mV of rails, 2.8V to 6V single-supply operation, and DFN-8 package suitability for space-constrained analog signal chains requiring low leakage and low noise.
Technical Context
The LTC6241IDD#PBF implements a complementary CMOS input stage with ultra-low input bias current and low input capacitance (3.5pF differential), enabling stable operation with high-source-impedance transducers. Its unity-gain-stable architecture supports wideband closed-loop configurations without external compensation.
It features matched dual amplifiers with guaranteed channel-to-channel VOS match ≤300μV and CMRR ≥76dB over –40°C to 85°C, supporting differential signal processing and common-mode rejection in noisy industrial environments. The device operates from a minimum 2.8V supply and maintains full performance up to 6V, with PSRR >80dB across its operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 18MHz - enables stable amplification of signals up to ~10MHz in unity-gain buffer or moderate-gain configurations |
| Input Bias Current | 0.2pA typ, 1pA max (–40°C to 85°C) - preserves signal integrity in picoamp-level photodiode or piezoelectric sensor interfaces |
| 0.1Hz–10Hz Noise | 550nVP-P - critical for DC-coupled, low-frequency measurement systems like ECG front-ends |
| Input Offset Voltage | 125μV max (–40°C to 85°C) - ensures <0.5% gain error in 100mV full-scale sensor outputs without trimming |
| Output Swing | Within 30mV of rails at 1mA load - maximizes dynamic range in low-voltage (3V/5V) data acquisition systems |
| Supply Range | 2.8V to 6V single supply - compatible with modern low-power microcontrollers and ADC reference voltages |
| Slew Rate | 10V/μs - supports fast settling for pulse-shaped sensor outputs and multiplexed analog inputs |
Pinout & Package
The LTC6241IDD#PBF is housed in an 8-lead (3mm × 3mm) plastic DFN package with underside thermal pad connected to V– (PCB connection optional). Pin 1 is marked by a dot; the exposed pad improves thermal performance and must be soldered for rated θJA = 43°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads up to 10mA while maintaining rail-to-rail swing |
| 2 | –IN A | Inverting input of Amplifier A - high-impedance node (1012Ω) for feedback network connection |
| 3 | +IN A | Non-inverting input of Amplifier A - accepts common-mode voltages from V– to V+ – 0.3V |
| 4 | V– | Negative supply rail - also connects to exposed thermal pad; serves as reference for output swing and input common-mode range |
| 5 | V+ | Positive supply rail - supports single-supply operation from 2.8V to 6V |
| 6 | OUT B | Amplifier B output - independently buffered; matches OUT A in AC/DC performance |
| 7 | –IN B | Inverting input of Amplifier B - electrically isolated from Amplifier A; enables dual-channel signal paths |
| 8 | +IN B | Non-inverting input of Amplifier B - identical input characteristics to +IN A; supports matched differential pair design |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 0.2pA typical at 25°C - minimizes voltage error across high-value feedback resistors (>100MΩ) |
| Rail-to-rail output stage | Swings to within 30mV of V+ and V– at 1mA - preserves >98% of available signal range in 3V systems |
| Low 0.1Hz–10Hz noise | 550nVP-P - enables sub-microvolt resolution in DC-coupled biosignal amplifiers |
| Matched dual amplifier pair | VOS match ≤300μV and CMRR match ≥76dB - reduces common-mode errors in instrumentation-grade difference amplifiers |
| Wide supply range | 2.8V to 6V single supply - eliminates need for charge pumps or LDOs in battery-powered portable instruments |
Applications
| Photodiode Amplifier | Medical ECG Front-End |
|---|---|
Use Scenario: Amplifying nanoamp-level photocurrent from silicon PIN diodes in spectrophotometers or smoke detectors. IC Role / Device Role: Transimpedance amplifier (TIA) with ultra-low input bias current and low input capacitance to maximize bandwidth and SNR. Use Value: 0.2pA input bias current prevents significant dark-current error; 3.5pF input capacitance allows stable 10MHz TIA designs with 10kΩ–1MΩ feedback resistors. | Use Scenario: Conditioning low-amplitude, low-frequency biopotential signals (0.5–100Hz) in portable ECG monitors. IC Role / Device Role: First-stage differential amplifier with high CMRR and low 1/f noise for lead-wire interference rejection. Use Value: 550nVP-P 0.1Hz–10Hz noise ensures <1μV RMS input-referred noise; rail-to-rail output drives 12-bit SAR ADCs directly from 3.3V supplies. |
| High-Impedance pH Sensor Interface | Low-Noise Instrumentation Amplifier Gain Stage |
Use Scenario: Buffering high-output-impedance glass electrode signals (≥1GΩ) in handheld pH meters. IC Role / Device Role: Unity-gain voltage follower with guarded input traces to minimize leakage-induced drift. Use Value: 1pA max input bias current limits offset drift to <1mV/hour on 1GΩ source; DFN-8 package enables compact guard-ring PCB layout. | Use Scenario: Second-stage gain amplification in 3-op-amp instrumentation amplifiers for strain gauge bridges. IC Role / Device Role: Precision non-inverting amplifier with matched VOS and CMRR to preserve common-mode rejection ratio. Use Value: Channel-to-channel VOS match ≤300μV ensures <0.01% gain error in matched amplifier pairs; 18MHz GBW supports 10kHz bandwidth at G=100. |
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 |
|---|---|---|---|
| ADA4522-2ARZ | Zero-drift architecture; 0.3μV max VOS, but higher 1/f noise (1.5μVP-P) and lower GBW (3MHz) | Better DC accuracy for <1Hz applications; unsuitable for >1MHz signal conditioning | Select when ultra-low drift dominates over wideband noise performance |
| OPA2189IDR | Zero-drift; 0.005μV/°C drift, 5.2nV/√Hz @1kHz, but 1pA input bias current only at 25°C (rises to 10pA at 85°C) | Superior long-term stability in temperature-varying environments; higher current noise limits high-Z sensor use | Select when offset drift is critical and source impedance <100MΩ |
Compared with ADA4522-2ARZ and OPA2189IDR, the LTC6241IDD#PBF offers superior 0.1Hz–10Hz noise and guaranteed low input bias current over temperature - making it preferred for photodiode, pH electrode, and other ultra-high-impedance sensor interfaces where leakage and 1/f noise dominate system error budgets.
Availability
LTC6241IDD#PBF is available at Aetrix Electronics and suitable for medical instrumentation, portable analytical equipment, and industrial sensor signal conditioning requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for LTC6241IDD#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC6241 belongs to ADI's precision op amp product line, designed specifically for low-noise, low-input-bias-current applications in high-impedance sensor signal chains, medical diagnostics, and portable test equipment.
FAQ
What is the maximum input bias current specification for LTC6241IDD#PBF over its full operating temperature range?
The LTC6241IDD#PBF guarantees a maximum input bias current of 1pA over the full –40°C to +85°C operating temperature range, as specified in the Electrical Characteristics table for the DFN package variant. This value is confirmed for both standard and HV versions under all supply conditions, ensuring reliable performance in high-impedance circuits across environmental extremes.
Does LTC6241IDD#PBF support true rail-to-rail input common-mode range?
No, the LTC6241IDD#PBF does not support rail-to-rail input common-mode range. Its input common-mode voltage range extends to the negative rail (V–) but only up to V+ – 0.3V. At VS = 5V, this means the valid input range is 0V to 4.7V. This limitation is inherent to its CMOS input stage and is explicitly defined in the Absolute Maximum Ratings and Electrical Characteristics sections of the datasheet.
What is the thermal resistance (θJA) of LTC6241IDD#PBF in its DFN-8 package?
The LTC6241IDD#PBF has a junction-to-ambient thermal resistance (θJA) of 43°C/W when mounted on a standard JEDEC 2-layer board with the exposed thermal pad soldered to a 1-inch² copper area. This value assumes proper PCB layout per Linear Technology's DFN thermal guidelines and is significantly lower than SO-8 variants (190°C/W), enabling higher power dissipation in compact layouts.
Can LTC6241IDD#PBF operate from a ±5V dual supply?
No, the standard LTC6241IDD#PBF is rated for single-supply operation from 2.8V to 6V. For ±5V operation, the HV variant (e.g., LTC6241HVIDD#PBF) must be used, which guarantees operation up to ±5.5V total supply (11V). The standard part's absolute maximum total supply voltage is 7V, and exceeding this risks permanent damage.
How is channel-to-channel matching characterized for LTC6241IDD#PBF?
Channel-to-channel matching for LTC6241IDD#PBF is specified as VOS match ≤300μV and CMRR match ≥76dB over –40°C to +85°C. These parameters represent the absolute difference between Amplifier A and Amplifier B under identical test conditions and are measured per Note 5 in the datasheet, where matching is defined as the differential μV/V converted to dB - critical for instrumentation-grade differential amplification.
LTC6241IDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- 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-DFN (3x3)
LTC6241IDD#PBF FAQ
1.How can I place an order for LTC6241IDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6241IDD#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 LTC6241IDD#PBF reliable?
The price and inventory of LTC6241IDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6241IDD#PBF is usually 5 days.
3.What payment methods are accepted for LTC6241IDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6241IDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6241IDD#PBF?
LTC6241IDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6241IDD#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 LTC6241IDD#PBF?
For technical support, including LTC6241IDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6241IDD#PBF requirements.
6.How does Aetrix verify that LTC6241IDD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6241IDD#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 LTC6241IDD#PBF meets industry standards.
7.What is the process for return or replacement of LTC6241IDD#PBF?
All LTC6241IDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6241IDD#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 LTC6241IDD#PBF part is unused and in its original packaging.
Return procedure for LTC6241IDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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