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Analog Devices Inc. LTC6269IMS8E#PBF
- Part No.:
- LTC6269IMS8E#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC6269IMS8E#PBF.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,112
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Product details
Overview
LTC6269IMS8E#PBF from Analog Devices (formerly Linear Technology) is a dual-channel, 500MHz FET-input operational amplifier optimized for ultra-low input bias current (±3fA typ. at 25°C), low input capacitance (450fF common-mode), and high-speed transimpedance amplification. It operates from 3.1V to 5.25V, delivers rail-to-rail output swing, and features shutdown control-making it ideal for photodiode-based optical receivers, precision CCD output buffering, and high-impedance sensor front-ends in medical and test equipment.
For engineers reviewing the LTC6269IMS8E#PBF datasheet, LTC6269IMS8E#PBF pinout, LTC6269IMS8E#PBF application, or LTC6269IMS8E#PBF equivalent, key selection criteria include verified fA-level input bias current stability over –40°C to 85°C, 350MHz –3dB bandwidth at unity gain, 4.3nV/√Hz voltage noise at 1MHz, 5.5fA/√Hz current noise at 100kHz, and MSOP-8 package compatibility with guard-ring layout support.
Technical Context
The LTC6269IMS8E#PBF employs a CMOS input buffer stage that bootstraps ESD protection diodes to minimize leakage, enabling its ±3fA input bias current. Its complementary differential input pair covers the full input common-mode range (0V to 4.5V on 5V supply), with seamless handoff between PNP- and NPN-dominated regions.
Internal cascode architecture and specialized compensation ensure stability with capacitive loads up to 10pF while delivering 400V/µs slew rate and –100dB harmonic distortion at 1MHz. The shutdown pin (SHDN) asserts high-impedance output within 480ns and draws only 0.39mA quiescent current per channel when disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 500MHz - enables stable closed-loop operation up to 350MHz at AV = 1 for high-speed signal conditioning. |
| Input Bias Current | ±3fA typ. at 25°C - preserves signal integrity in picoamp-level photodiode and ion-sensor interfaces. |
| Input Capacitance | 450fF common-mode - minimizes phase shift and peaking in transimpedance amplifier feedback networks. |
| Voltage Noise Density | 4.3nV/√Hz at 1MHz - supports low-noise amplification of weak signals without dominating system noise floor. |
| Supply Range | 3.1V to 5.25V - compatible with standard 3.3V and 5V logic rails and mixed-supply systems. |
| Operating Temp Range | –40°C to 85°C - qualified for industrial-grade embedded instrumentation and optical module applications. |
| Shutdown Current | 0.39mA per amplifier - reduces power by >97% during idle periods in battery-sensitive portable analyzers. |
Pinout & Package
The LTC6269IMS8E#PBF is housed in an 8-lead MSOP package with exposed pad (MS8E), where Pin 9 (exposed pad) is internally connected to V– and must be soldered to PCB ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Inverting amplifier output A | Rail-to-rail capable; drives 10mA load with <200mV saturation voltage above V–. |
| 2 (–INA) | Inverting input A | 450fF common-mode capacitance; voltage range: V– to V+ – 0.5V. |
| 3 (+INA) | Non-inverting input A | Matches –INA specs; used for reference or feedback configuration in single-ended designs. |
| 4 (V–) | Negative supply rail | Ground reference or negative rail; exposed pad (Pin 9) connects internally to this node. |
| 5 (V+) | Positive supply rail | Accepts 3.1V–5.25V; requires 0.1µF bypass capacitor placed adjacent to pin. |
| 6 (OUTB) | Inverting amplifier output B | Independent channel; identical AC/DC specs to OUTA; enables dual-TIA or differential receiver topologies. |
| 7 (–INB) | Inverting input B | Electrically isolated from Channel A; supports independent high-Z sensor inputs. |
| 8 (+INB) | Non-inverting input B | Enables dual-channel instrumentation with matched offset and noise performance. |
| 9 (Exposed Pad) | Thermal & electrical ground | Must be soldered to PCB ground plane; improves θJA to 40°C/W and stabilizes bias current. |
Key Features
| Feature | Design Value |
|---|---|
| FET input architecture | Enables ±3fA input bias current at room temperature-critical for femtoamp photodiode current measurement. |
| Rail-to-rail output swing | Delivers full dynamic range across 3.1V–5.25V supplies, maximizing SNR in ADC driver applications. |
| Low 450fF input capacitance | Reduces feedback network peaking in TIAs; allows stable 65MHz transimpedance gain with 20kΩ feedback resistor. |
| Active shutdown control | Reduces per-channel supply current from 16.5mA to 0.39mA in <500ns, enabling burst-mode optical sensing. |
| MSOP-8 with exposed V– pad | Provides 40°C/W thermal resistance and low-inductance ground path-essential for maintaining fA-level bias stability. |
Applications
| Photodiode Transimpedance Amplifier | CCD Output Buffer |
|---|---|
Use Scenario: Converting weak photocurrent from silicon PIN photodiodes (e.g., OSI FCI-125G-006) into stable voltage signals for digitization in optical time-domain reflectometers. IC Role / Device Role / Timing Role: Primary transimpedance amplifier with 20kΩ feedback resistor and 65MHz bandwidth; uses low CIN to suppress parasitic pole formation. Use Value: Achieves 65MHz bandwidth with 20kΩ gain-enabling sub-nanosecond pulse detection without external compensation components. | Use Scenario: Driving analog video outputs from interline-transfer CCD image sensors in industrial machine vision cameras. IC Role / Device Role / Timing Role: High-speed, low-distortion buffer with –100dB THD at 1MHz; provides rail-to-rail swing into 1kΩ/10pF loads. Use Value: Maintains <0.1% gain error and <17ns settling time for 1V–4V transitions-preserving pixel fidelity in 60fps imaging pipelines. |
| Photomultiplier Tube Post-Amplifier | Low-IBIAS Precision Instrumentation |
Use Scenario: Amplifying microamp-level anode pulses from PMTs in radiation detection spectrometers, where leakage current must not corrupt pulse height analysis. IC Role / Device Role / Timing Role: First-stage post-amplifier with 400V/µs slew rate and 350MHz bandwidth; operates from ±2.5V split supplies. Use Value: Delivers <10ps timing jitter on 50mV step response-enabling precise time-of-flight measurements in scintillation detectors. | Use Scenario: Front-end amplification of ultra-high-impedance pH electrodes and ion-selective field-effect transistors (ISFETs) in lab-grade analyzers. IC Role / Device Role / Timing Role: DC-coupled, low-drift amplifier with 4μV/°C offset drift and >1000GΩ input resistance. Use Value: Enables stable 16-bit resolution over 24-hour calibration cycles-eliminating drift-induced recalibration in environmental monitoring systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual FET-input op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4817-2ARMZ | Higher input bias current (2pA max), higher voltage noise (4.3nV/√Hz same), but wider GBW (1GHz) and lower input capacitance (0.6pF). | Better suited for >500MHz small-signal amplification; less optimal for fA-level photodiode current integration. | Select ADA4817-2ARMZ when bandwidth >600MHz is required and input bias <100fA is not critical. |
| OPA2810IDGKT | Lower input bias current (0.3fA typ.), higher supply current (22mA), no shutdown function, DFN-8 package. | Superior for ultra-low-leakage applications but lacks power-gating capability and MSOP footprint compatibility. | Choose OPA2810IDGKT for lowest possible bias current in space-constrained layouts where shutdown is unnecessary. |
Compared with LTC6269IMS8E#PBF, ADA4817-2ARMZ trades femtoamp bias performance for gigahertz bandwidth, while OPA2810IDGKT achieves lower bias current but sacrifices integrated shutdown and MSOP-8 mechanical compatibility-making LTC6269IMS8E#PBF the balanced choice for industrial TIA and sensor interface designs requiring fA stability, layout flexibility, and power management.
Availability
LTC6269IMS8E#PBF is available at Aetrix Electronics and suitable for photodiode transimpedance amplifiers, CCD output buffering, and low-IBIAS precision instrumentation requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LTC6269IMS8E#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 precision instrumentation, communications, and industrial markets.
The LTC6269 belongs to ADI's ultra-low-input-bias-current op amp product line, engineered specifically for photonics, scientific measurement, and high-impedance sensor signal chains where leakage current and input capacitance directly limit resolution and bandwidth.
FAQ
What is the maximum operating temperature range specified for the LTC6269IMS8E#PBF?
The LTC6269IMS8E#PBF is rated for operation from –40°C to +85°C, as confirmed in the "ORDER INFORMATION" table and "ABSOLUTE MAXIMUM RATINGS" section of the official datasheet. This I-grade specification ensures reliability in industrial environments such as optical test equipment and factory automation systems where ambient temperatures exceed consumer-grade limits.
Does the LTC6269IMS8E#PBF support split-supply operation?
Yes, the LTC6269IMS8E#PBF supports split-supply operation. The datasheet specifies total supply voltage (V+ – V–) from 3.1V to 5.25V, allowing configurations such as ±2.5V. Input common-mode range extends from V– to V+ – 0.5V, and rail-to-rail output swing functions across both single- and dual-supply setups-enabling flexible integration into legacy analog signal chains.
How does the exposed pad (Pin 9) of the LTC6269IMS8E#PBF connect electrically?
The exposed pad (Pin 9) of the LTC6269IMS8E#PBF is internally connected to the V– pin and must be soldered to the PCB ground plane. As stated in the "PIN CONFIGURATION" diagram, this connection is mandatory for achieving the specified θJA of 40°C/W and maintaining stable input bias current performance-especially critical for fA-level applications where thermal gradients induce leakage.
Can the LTC6269IMS8E#PBF drive a 10pF capacitive load while maintaining stability?
Yes, the LTC6269IMS8E#PBF is characterized for stable operation with up to 10pF capacitive load, as confirmed in the "ELECTRICAL CHARACTERISTICS" tables where RL = 1kΩ and CL = 10pF conditions are explicitly used. Its internal compensation and cascode output stage prevent peaking or oscillation under these conditions-validated by 50mV step response plots showing monotonic settling without overshoot.
What is the typical input offset voltage drift of the LTC6269IMS8E#PBF over temperature?
The typical input offset voltage drift of the LTC6269IMS8E#PBF is 4μV/°C, as specified in the "ELECTRICAL CHARACTERISTICS" table under TC VOS (Input Offset Voltage Drift) for VCM = 2.75V. This low drift value ensures minimal baseline drift across the –40°C to +85°C operating range-critical for DC-coupled sensor interfaces where calibration intervals exceed 24 hours.
LTC6269IMS8E#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 400V/µs
- Gain Bandwidth Product:
- 500 MHz
- -3db Bandwidth:
- 350 MHz
- Current - Input Bias:
- 0.003 pA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 16.5mA (x2 Channels)
- Current - Output / Channel:
- 90 mA
- Voltage - Supply Span (Min):
- 3.1 V
- Voltage - Supply Span (Max):
- 5.25 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP-EP
LTC6269IMS8E#PBF FAQ
1.How can I place an order for LTC6269IMS8E#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6269IMS8E#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 LTC6269IMS8E#PBF reliable?
The price and inventory of LTC6269IMS8E#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6269IMS8E#PBF is usually 5 days.
3.What payment methods are accepted for LTC6269IMS8E#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6269IMS8E#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6269IMS8E#PBF?
LTC6269IMS8E#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6269IMS8E#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 LTC6269IMS8E#PBF?
For technical support, including LTC6269IMS8E#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6269IMS8E#PBF requirements.
6.How does Aetrix verify that LTC6269IMS8E#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6269IMS8E#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 LTC6269IMS8E#PBF meets industry standards.
7.What is the process for return or replacement of LTC6269IMS8E#PBF?
All LTC6269IMS8E#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6269IMS8E#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 LTC6269IMS8E#PBF part is unused and in its original packaging.
Return procedure for LTC6269IMS8E#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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