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Analog Devices Inc. LTC6240HVIS8#PBF
- Part No.:
- LTC6240HVIS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC6240HVIS8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:503
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Product details
Overview
LTC6240HVIS8#PBF from Analog Devices (formerly Linear Technology) is a single-channel, rail-to-rail output, low-noise CMOS operational amplifier optimized for precision signal conditioning in high-impedance sensor interfaces. 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 over –40°C to +85°C. It is widely used in photodiode amplifiers and medical instrumentation front-ends.
For engineers reviewing the LTC6240HVIS8#PBF datasheet, LTC6240HVIS8#PBF pinout, LTC6240HVIS8#PBF application, or LTC6240HVIS8#PBF equivalent, key selection criteria include guaranteed 1pA max IB at temperature, rail-to-rail output swing within 30mV of rails, ±5V HV supply capability, HVI-grade temperature rating, and SO-8 package compatibility with guard ring PCB layouts.
Technical Context
The LTC6240HVIS8#PBF employs a proprietary CMOS input stage with ultra-low input capacitance (3.5pF differential) and guarded layout to minimize leakage and noise coupling. Its unity-gain-stable architecture supports wideband closed-loop configurations up to 18MHz while maintaining ≥60° phase margin into 1kΩ loads with 5pF capacitive load.
It features dual-supply operation (±2.5V to ±5.5V) or single-supply (2.8V to 6V), with input common-mode range extending to the negative rail and output swing limited only by 30mV headroom to each supply. The HVI grade guarantees full electrical performance across –40°C to +85°C, including 2.5μV/°C max VOS drift and 104dB min PSRR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 18MHz - enables stable unity-gain buffers and 10× gain amplifiers up to ~1.8MHz without compensation. |
| Input Bias Current | 1pA max (–40°C to +85°C) - preserves signal integrity in >1GΩ source impedances like photodiodes and piezoelectric sensors. |
| 0.1Hz–10Hz Noise | 550nVP-P - critical for DC-coupled, low-frequency measurement systems such as ECG and pH sensors. |
| Input Offset Voltage | 125μV max (–40°C to +85°C) - ensures <0.5% error in 25mV full-scale transducer outputs without trimming. |
| Output Swing | Rail-to-rail, within 30mV of V+ and V– - maximizes dynamic range in low-voltage (3V) or bipolar (±5V) supplies. |
| Supply Range | 2.8V to 6V single or ±2.5V to ±5.5V dual - supports legacy 5V systems and modern low-power 3V designs alike. |
| Slew Rate | 10V/μs - handles fast step inputs (e.g., pulse oximetry LED drive feedback) with minimal distortion. |
Pinout & Package
Package: 8-lead plastic SO (SO-8), 5.0mm × 6.2mm body, 1.27mm pitch, RoHS-compliant lead-free finish. Designed for PCB guard ring implementation to suppress leakage currents in high-impedance nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unused; must be left floating or tied to ground per layout best practice. |
| 2 (V–) | Negative Supply Rail | Reference for internal biasing; connects to ground (single-supply) or negative rail (dual-supply). |
| 3 (+IN) | Inverting Input | High-impedance CMOS node; requires guard ring and short trace routing to minimize leakage and noise pickup. |
| 4 (–IN) | Non-Inverting Input | High-impedance CMOS node; symmetric layout with +IN recommended for matched parasitics. |
| 5 (OUT) | Amplifier Output | Class AB rail-to-rail output stage capable of sourcing/sinking 5mA while staying within 30mV of rails. |
| 6 (NC) | No Connect | Internally unused; no connection required. |
| 7 (NC) | No Connect | Internally unused; no connection required. |
| 8 (V+) | Positive Supply Rail | Power supply input; decoupling capacitor (0.1μF ceramic) required within 5mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1pA max over –40°C to +85°C enables direct interfacing with >10GΩ sources without guard ring degradation. |
| Low 0.1Hz–10Hz noise | 550nVP-P supports high-resolution DC measurements in medical and analytical instruments. |
| Rail-to-rail output swing | Swings to within 30mV of both supply rails, preserving >95% of available signal range in 3V systems. |
| HVI temperature grade | Specified and tested from –40°C to +85°C - eliminates derating concerns in industrial and automotive under-hood environments. |
| High CMRR & PSRR | ≥80dB CMRR and ≥80dB PSRR ensure immunity to supply ripple and common-mode interference in noisy environments. |
Applications
| Photodiode Amplifier | Medical Instrumentation Front-End |
|---|---|
Use Scenario: Transimpedance amplification of weak photocurrents from silicon PIN photodiodes in pulse oximeters and spectrophotometers. IC Role / Device Role / Timing Role: Precision transimpedance amplifier with ultra-low IB and low VOS to convert sub-nA currents to measurable voltages without saturation or drift. Use Value: Enables detection of <100pA photocurrents with <1μV RMS noise floor and <0.1% gain error over temperature. | Use Scenario: First-stage amplification of low-amplitude bio-signals (ECG, EEG) with high source impedance (>1MΩ) and strict DC accuracy requirements. IC Role / Device Role / Timing Role: High-input-impedance, low-drift, low-noise instrumentation amplifier input stage. Use Value: Delivers <1μVP-P 0.1–10Hz noise and <125μV offset to support 16-bit+ resolution in battery-powered portable diagnostics. |
| High-Impedance Transducer Interface | Charge-Coupled Amplifier |
Use Scenario: Signal conditioning for piezoresistive pressure sensors and MEMS accelerometers with GΩ-level Thévenin resistance. IC Role / Device Role / Timing Role: Low-bias-current voltage follower or non-inverting amplifier driving ADC input stages. Use Value: Prevents signal attenuation and thermal drift errors caused by IB-induced voltage drops across sensor resistors >1GΩ. | Use Scenario: Integrating amplifier for charge output sensors (e.g., accelerometers, acoustic emission transducers) requiring femtocoulomb-level resolution. IC Role / Device Role / Timing Role: Ultra-low IB, low VOS, and low 1/f noise integrator core with precision feedback capacitor. Use Value: Achieves <10fC input-referred charge noise and <100pC full-scale range stability over 8-hour monitoring periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, low-input-bias op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4530-1ARZ | 0.1fA typical IB, 20μV max VOS, 2.8MHz GBW, SO-8 package | Better IB and VOS, but lower bandwidth limits AC response in fast photodiode apps | Select when femtoampere-level IB dominates design priority over speed. |
| OPA377AIDR | 0.2pA max IB, 150μV max VOS, 10MHz GBW, SO-8 package | Lower cost, wider temp range (–40°C to +125°C), but higher noise (7.5nV/√Hz) and no HV option | Select for cost-sensitive industrial sensors where ±5V operation is not required. |
Compared with ADA4530-1ARZ and OPA377AIDR, the LTC6240HVIS8#PBF uniquely balances 1pA max IB, 18MHz bandwidth, ±5.5V operation, and HVI-grade reliability-making it optimal for high-speed, high-precision analog front-ends where both speed and leakage control are non-negotiable.
Availability
LTC6240HVIS8#PBF is available at Aetrix Electronics and suitable for photodiode amplifiers, medical instrumentation front-ends, and high-impedance transducer interfaces requiring stable component supply, long-term manufacturability, and guaranteed parametric performance across extended temperature ranges.
Supply support for LTC6240HVIS8#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC6240 series belongs to ADI's precision op amp product line, engineered specifically for ultra-low-input-bias, low-noise, rail-to-rail signal conditioning in demanding sensor and instrumentation applications.
FAQ
What is the maximum guaranteed input bias current for LTC6240HVIS8#PBF over its operating temperature range?
The LTC6240HVIS8#PBF guarantees a maximum input bias current of 1pA across its full specified operating temperature range of –40°C to +85°C. This value is explicitly tested and documented in the Electrical Characteristics table for the HVI grade, distinguishing it from lower-grade variants that specify 1pA only at 25°C or over narrower ranges. The 1pA limit ensures reliable operation with high-impedance sources such as photodiodes and piezoelectric sensors.
Does LTC6240HVIS8#PBF support ±5V dual-supply operation?
Yes, the LTC6240HVIS8#PBF supports ±5V dual-supply operation as part of its HV (High Voltage) variant designation. The "HV" suffix in the part number indicates guaranteed functionality up to ±5.5V total supply (11V), and the datasheet confirms operation at ±5V with full specification of parameters including CMRR, PSRR, and output swing. This makes LTC6240HVIS8#PBF suitable for legacy industrial and test equipment requiring bipolar rails.
What is the minimum supply voltage required for stable operation of LTC6240HVIS8#PBF?
The LTC6240HVIS8#PBF requires a minimum total supply voltage of 2.8V, whether operated from a single 2.8V–6V rail or dual ±1.4V–±3V rails. This is guaranteed across the full –40°C to +85°C temperature range and verified via power supply rejection ratio testing. Operation below 2.8V may result in degraded gain, increased distortion, or failure to meet rail-to-rail output specifications.
How does the LTC6240HVIS8#PBF achieve rail-to-rail output swing?
The LTC6240HVIS8#PBF achieves rail-to-rail output swing using a complementary Class AB output stage with PMOS and NMOS drivers biased to operate near the supply rails. At 5mA load, the output swings within 30mV of V+ and V–, enabling >95% utilization of the available voltage range in 3V systems. This architecture is fully characterized and guaranteed over temperature, unlike many CMOS op amps where rail-to-rail claims apply only at light loads or 25°C.
Is LTC6240HVIS8#PBF pin-compatible with other members of the LTC624x family?
No, the LTC6240HVIS8#PBF is not pin-compatible with dual (LTC6241) or quad (LTC6242) variants, as those use different pinouts in SO-8 packages - for example, LTC6241IS8 places both inputs and outputs on separate pins without NCs. However, within the single-channel LTC6240 family, the SO-8 variants (including LTC6240HVIS8#PBF) share identical pinout and footprint with LTC6240IS8#PBF and LTC6240HS8#PBF, enabling drop-in replacement across temperature grades.
LTC6240HVIS8#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:
- General Purpose
- Number of Circuits:
- 1
- 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:
- 60 µV
- Current - Supply:
- 2.7mA
- Current - Output / Channel:
- 35 mA
- Voltage - Supply Span (Min):
- 2.8 V
- Voltage - Supply Span (Max):
- 11 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LTC6240HVIS8#PBF FAQ
1.How can I place an order for LTC6240HVIS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6240HVIS8#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 LTC6240HVIS8#PBF reliable?
The price and inventory of LTC6240HVIS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6240HVIS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC6240HVIS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6240HVIS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6240HVIS8#PBF?
LTC6240HVIS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6240HVIS8#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 LTC6240HVIS8#PBF?
For technical support, including LTC6240HVIS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6240HVIS8#PBF requirements.
6.How does Aetrix verify that LTC6240HVIS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6240HVIS8#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 LTC6240HVIS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC6240HVIS8#PBF?
All LTC6240HVIS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6240HVIS8#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 LTC6240HVIS8#PBF part is unused and in its original packaging.
Return procedure for LTC6240HVIS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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