My Inquiry
My Account
Analog Devices Inc. LTC6240HS8#PBF
- Part No.:
- LTC6240HS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC6240HS8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,321
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC6240HS8#PBF from Analog Devices (formerly Linear Technology) is a single, 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, ≤1pA max input bias current at –40°C to 125°C, and operates from 2.8V to 6V supplies - enabling high-fidelity amplification in portable medical instrumentation and photodiode front-ends.
For engineers reviewing the LTC6240HS8#PBF datasheet, LTC6240HS8#PBF pinout, LTC6240HS8#PBF application, or LTC6240HS8#PBF equivalent, key selection criteria include guaranteed 1pA max input bias current over full H-grade temperature range, rail-to-rail output swing within 30mV of rails, 125μV max offset voltage, and SO-8 package compatibility with PCB guard ring layouts for leakage-sensitive designs.
Technical Context
The LTC6240HS8#PBF employs a proprietary CMOS input stage with ultra-low gate leakage, enabling sub-picoampere bias current stability across –40°C to 125°C. Its unity-gain-stable architecture supports direct use in transimpedance configurations without external compensation.
Internal rail-to-rail output stage uses complementary PMOS/NMOS drivers to achieve 30mV headroom to both supply rails under 5mA load, while input common-mode range extends to the negative rail - critical for single-supply operation with ground-referenced sensors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 18MHz - enables stable closed-loop gain ≥10 at 1.8MHz or ≥2 at 9MHz for anti-aliasing filter design. |
| Input Bias Current | ≤1pA max (–40°C to 125°C) - preserves signal integrity in >1GΩ source impedance applications like photodiode amps. |
| 0.1Hz–10Hz Noise | 550nVP-P - ensures minimal baseline drift in DC-coupled medical sensor front-ends. |
| Input Offset Voltage | 125μV max (–40°C to 125°C) - reduces calibration burden in precision weigh-scale and strain-gauge amplifiers. |
| Supply Voltage Range | 2.8V to 6V - supports battery-powered portable devices and industrial 3.3V/5V systems without level-shifting. |
| Slew Rate | 10V/μs - allows clean 1VPP output at 1.6MHz without slewing distortion in active filters. |
| Output Swing | Within 30mV of rails (at 5mA) - maximizes dynamic range in low-voltage data acquisition systems. |
Pinout & Package
Package: 8-lead plastic SO (SO-8), 150°C max junction temperature, θJA = 190°C/W. Designed for PCB guard ring implementation to mitigate leakage paths in high-impedance circuits.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No connect | Unused pad; must be left floating or tied to V– per layout guidelines to avoid parasitic coupling. |
| 2 (V–) | Negative supply | Reference for internal biasing; connects to ground or negative rail; undersides of DFN variants tie here. |
| 3 (+IN) | Inverting input | Differential input node; 3pF common-mode capacitance limits RF pickup in sensitive analog front-ends. |
| 4 (–IN) | Non-inverting input | High-impedance CMOS node; requires guard ring routing to suppress leakage-induced offset drift. |
| 5 (OUT) | Amplifier output | Rail-to-rail capable; drives 10kΩ loads to within 30mV of rails; stable into 5pF capacitive loads. |
| 6 (NC) | No connect | Unused pad; electrically isolated; no internal connection - avoid routing signals nearby. |
| 7 (NC) | No connect | Unused pad; same isolation as Pin 1 and 6 - maintain clearance for ESD robustness. |
| 8 (V+) | Positive supply | Power rail input; PSRR >80dB up to 10kHz ensures immunity to digital supply noise in mixed-signal PCBs. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | Guaranteed ≤1pA max over –40°C to 125°C enables stable transimpedance gain in photodiode amps without drift. |
| Rail-to-rail output swing | Swings to within 30mV of V+ and V– at 5mA load, preserving >95% of supply voltage as usable signal range. |
| Low 0.1Hz–10Hz noise | 550nVP-P supports DC-coupled amplification of microvolt-level bio-signals without 1/f noise corruption. |
| H-grade temperature rating | Specified from –40°C to 125°C ensures performance continuity in automotive engine control and industrial motor drives. |
| Unity-gain stable | Operates unconditionally stable at gain = 1, eliminating need for external compensation in buffer and follower applications. |
Applications
| Photodiode Amplifier | Medical Instrumentation |
|---|---|
Use Scenario: Amplifying weak current from silicon photodiodes in pulse oximetry or spectroscopy systems. IC Role / Device Role: Transimpedance amplifier converting photocurrent to voltage with minimal input loading. Use Value: ≤1pA input bias current prevents signal loss across >1GΩ feedback resistors; 550nVP-P noise preserves SNR in low-light conditions. |
Use Scenario: Front-end amplification of ECG/EEG electrode signals in portable patient monitors. IC Role / Device Role: High-input-impedance, low-drift gain stage before ADC sampling. Use Value: 125μV max offset and 2.5μV/°C drift minimize calibration frequency; rail-to-rail output maximizes ADC utilization. |
| High-Impedance Transducer Amplifier | Low-Noise Signal Processing |
Use Scenario: Conditioning output from piezoresistive pressure sensors or pH electrodes with GΩ-level source impedances. IC Role / Device Role: Precision non-inverting amplifier with guarded input traces. Use Value: Input capacitance of 3pF minimizes phase shift at sensor resonance frequencies; SO-8 package supports guard ring layout. |
Use Scenario: First-stage amplification in battery-powered data loggers capturing low-frequency environmental signals. IC Role / Device Role: Low-power, low-noise gain block preceding anti-aliasing filtering. Use Value: 2.4mA supply current at 125°C enables >1-year operation on coin-cell batteries; 18MHz GBW supports wideband diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4522-1ARZ | 2.5μV max offset (vs 125μV), 5.6nV/√Hz noise (vs 7nV/√Hz), 200pA max input bias (vs 1pA), SO-8 package | Better DC precision but higher input bias limits use with >100MΩ sources; suited for precision voltage references, not photodiodes | Select when ultra-low offset dominates over input bias; verify leakage path integrity with ADA4522's higher IB. |
| OPA376AIDBVR | 25μV max offset, 7.5nV/√Hz noise, 0.2pA typ input bias (but not specified max over temp), SOT-23-5 package | Smaller footprint and lower cost, but no guaranteed 1pA max over –40°C to 125°C; limited thermal margin in high-temp enclosures | Choose for space-constrained consumer designs where full H-grade validation isn't required; avoid in automotive under-hood use. |
Compared with ADA4522-1ARZ and OPA376AIDBVR, the LTC6240HS8#PBF uniquely guarantees ≤1pA input bias current across –40°C to 125°C while maintaining 18MHz bandwidth and SO-8 guard-ring compatibility - making it the only option validated for production-grade photodiode and high-impedance industrial sensor front-ends requiring long-term stability.
Availability
LTC6240HS8#PBF is available at Aetrix Electronics and suitable for photodiode amplification, portable medical instrumentation, and high-impedance transducer interfacing requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LTC6240HS8#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, serving industrial, automotive, communications, and healthcare markets.
The LTC6240 series belongs to Linear Technology's precision op amp product line, engineered specifically for low-noise, low-input-bias, rail-to-rail signal conditioning in high-impedance, wide-temperature applications such as medical sensors and optical detection systems.
FAQ
What is the maximum guaranteed input bias current for LTC6240HS8#PBF over its full operating temperature range?
The LTC6240HS8#PBF guarantees ≤1pA maximum input bias current across its full specified operating temperature range of –40°C to 125°C. This specification is explicitly confirmed in the "ELECTRICAL CHARACTERISTICS" table for the H-grade version (LTC6240H) under Note 7, which states bias current is 100% tested and guaranteed for the S8 package. This makes LTC6240HS8#PBF uniquely suitable for photodiode and electrophysiology applications where leakage current directly impacts accuracy.
Does LTC6240HS8#PBF support true rail-to-rail input common-mode range?
No - the LTC6240HS8#PBF features rail-to-rail *output* swing but only extends its input common-mode range to the negative supply rail (V–), not to the positive rail. Per the datasheet, input voltage range is guaranteed from 0V to 3.5V with 5V supply (V+ = 5V, V– = 0V), meaning the upper limit is 3.5V - 1.5V below V+. This limitation is inherent to its CMOS input stage architecture and must be accounted for in single-supply non-inverting amplifier designs using LTC6240HS8#PBF.
Can LTC6240HS8#PBF drive capacitive loads without instability?
Yes - the LTC6240HS8#PBF is unity-gain stable and characterized to drive up to 5pF capacitive loads without oscillation or excessive ringing, as verified in the "TYPICAL PERFORMANCE CHARACTERISTICS" section (Figure G14, G15). For loads exceeding 5pF, external isolation resistance (e.g., 10–50Ω in series with the output) is recommended. This capability makes LTC6240HS8#PBF suitable for driving ADC inputs and long PCB traces in data acquisition systems without added compensation networks.
What is the minimum supply voltage required for functional operation of LTC6240HS8#PBF?
The LTC6240HS8#PBF requires a minimum total supply voltage of 2.8V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Operation below this voltage is not guaranteed - parameters including gain bandwidth, slew rate, and output swing degrade significantly below 2.8V. At 2.8V supply, the device maintains full rail-to-rail output capability and 125μV max offset, enabling use in single-cell Li-ion (2.8–4.2V) and two-cell alkaline (2.8–3.2V) powered instruments.
Is LTC6240HS8#PBF pin-compatible with other members of the LTC624x family?
No - the LTC6240HS8#PBF (single amplifier, SO-8) is not pin-compatible with the dual LTC6241HS8#PBF or quad LTC6242HGN#PBF, despite sharing the same SO-8 footprint. Pin functions differ: LTC6240HS8#PBF uses Pins 1/6/7 as NC, while LTC6241HS8#PBF assigns those pins to second amplifier inputs/outputs. Interchanging them will cause functional failure. Always verify pin mapping against the specific part's "PIN CONFIGURATION" diagram before board layout - LTC6240HS8#PBF requires dedicated routing.
LTC6240HS8#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:
- 0.2 pA
- Voltage - Input Offset:
- 50 µV
- Current - Supply:
- 2mA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.8 V
- Voltage - Supply Span (Max):
- 6 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LTC6240HS8#PBF FAQ
1.How can I place an order for LTC6240HS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6240HS8#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 LTC6240HS8#PBF reliable?
The price and inventory of LTC6240HS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6240HS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC6240HS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6240HS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6240HS8#PBF?
LTC6240HS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6240HS8#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 LTC6240HS8#PBF?
For technical support, including LTC6240HS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6240HS8#PBF requirements.
6.How does Aetrix verify that LTC6240HS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6240HS8#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 LTC6240HS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC6240HS8#PBF?
All LTC6240HS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6240HS8#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 LTC6240HS8#PBF part is unused and in its original packaging.
Return procedure for LTC6240HS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC6240HS8#PBF Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
