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Analog Devices Inc. LTC6269HDD#PBF
- Part No.:
- LTC6269HDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC6269HDD#PBF.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,873
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Product details
Overview
LTC6269HDD#PBF from Analog Devices (formerly Linear Technology) is a dual-channel, 500MHz gain-bandwidth FET-input operational amplifier optimized for ultra-low input bias current (±3fA typ. at 25°C), 450fF common-mode input capacitance, and rail-to-rail output swing. It operates from 3.1V to 5.25V supply, draws 16.5mA per amplifier, and supports transimpedance amplifier (TIA) designs in photodiode-based optical sensing systems.
For engineers reviewing the LTC6269HDD#PBF datasheet, LTC6269HDD#PBF pinout, LTC6269HDD#PBF application, or LTC6269HDD#PBF equivalent, key selection criteria include guaranteed –40°C to 125°C operation, 350MHz –3dB bandwidth at unity gain, shutdown control with 480ns turn-off time, and compatibility with high-impedance sensor front-ends requiring sub-femtoampere leakage performance.
Technical Context
The LTC6269HDD#PBF employs a complementary CMOS input stage with bootstrapped ESD protection, enabling stable operation across its full input common-mode range (0V to 4.5V at 5V supply) while maintaining <450fF common-mode input capacitance. Its architecture integrates two differential amplifiers active over complementary voltage ranges to ensure consistent low distortion and high PSRR (75–95dB) across supply variations.
It delivers 400V/µs slew rate, –100dB harmonic distortion at 1MHz, and 4.3nV/√Hz input voltage noise at 1MHz - characteristics validated for driving SAR ADCs and buffering CCD outputs without signal degradation. The shutdown feature reduces quiescent current to 0.85mA per channel while preserving fast 580ns wake-up latency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 500MHz - enables stable closed-loop operation up to 350MHz at unity gain for high-speed signal conditioning. |
| Input Bias Current | ±3fA typical at 25°C - ensures minimal error in picoamp-level photodiode current measurement. |
| Input Capacitance | 450fF common-mode - minimizes phase shift and instability in transimpedance amplifier feedback networks. |
| Slew Rate | 400V/µs - supports fast settling of large-signal steps required in pulsed optical detection. |
| Supply Range | 3.1V to 5.25V - compatible with standard 3.3V and 5V system rails without level-shifting. |
| Operating Temp | –40°C to 125°C - qualified for automotive under-hood and industrial harsh-environment applications. |
| Shutdown Current | 0.85mA per amplifier - reduces power by >94% during idle periods in battery-powered sensors. |
Pinout & Package
The LTC6269HDD#PBF is housed in a 10-lead 3mm × 3mm plastic DFN package (DD) with exposed V– pad soldered to PCB for thermal and electrical integrity. Pin 11 (exposed pad) is internally connected to V– and must be soldered to ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V+) | Positive supply input | Accepts 3.1V–5.25V; requires local 0.1µF bypass capacitor to ground. |
| 2 (OUTA) | Channel A output | Rail-to-rail swing; capable of sourcing/sinking 25mA into 1kΩ load. |
| 3 (–INA) | Inverting input A | Valid input range: V– to V+ – 0.5V; guarded by internal bootstrapped ESD diodes. |
| 4 (+INA) | Non-inverting input A | Same voltage range as –INA; differential input resistance >1000GΩ. |
| 5 (V–) | Negative supply input | Typically grounded; if floating, must be bypassed to ground with 0.1µF capacitor. |
| 6 (SDB) | Shutdown B (active low) | Pull ≤0.75V to disable Channel B; unconnected = enabled. |
| 7 (OUTB) | Channel B output | Independent rail-to-rail output; electrically isolated from OUTA. |
| 8 (–INB) | Inverting input B | Identical specs to –INA; supports dual independent TIA channels. |
| 9 (+INB) | Non-inverting input B | Matches +INA performance; no crosstalk specified between channels. |
| 10 (SDA) | Shutdown A (active low) | Independent control of Channel A; VIH ≥1.5V enables operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | ±3fA typ. at 25°C enables accurate measurement of photocurrents below 1pA without guard-ring PCB layout. |
| Low input capacitance | 450fF common-mode allows stable 65MHz transimpedance gain with 20kΩ feedback resistor. |
| Rail-to-rail output | Swings within 140mV of rails at 25mA load, maximizing dynamic range in single-supply 3.3V systems. |
| Fast shutdown recovery | 580ns turn-on delay ensures minimal latency when reactivating channels in time-gated sensing. |
| High-speed distortion performance | –100dB HD2/HD3 at 1MHz supports clean amplification of fast optical pulses into SAR ADCs. |
Applications
| Photodiode-Based TIA | CCD Output Buffer |
|---|---|
Use Scenario: Converting weak photocurrent from silicon photodiodes in medical pulse oximetry. IC Role / Device Role / Timing Role: Transimpedance amplifier with 20kΩ feedback resistor and 65MHz bandwidth. Use Value: 450fF input capacitance and ±3fA bias current minimize noise gain peaking and DC offset drift over temperature. | Use Scenario: Driving analog video output from interline-transfer CCD image sensors. IC Role / Device Role / Timing Role: High-fidelity buffer with 350MHz bandwidth and –100dB THD+N at 1MHz. Use Value: 4.3nV/√Hz voltage noise and 400V/µs slew rate preserve pixel-level signal integrity during rapid line readout. |
| Photomultiplier Tube Post-Amp | SAR ADC Driver |
Use Scenario: Amplifying nanosecond-scale anode pulses from PMTs in radiation detection equipment. IC Role / Device Role / Timing Role: Low-noise post-amplifier with 500MHz GBW and 17ns 0.1% settling time. Use Value: 5.5fA/√Hz current noise and 300V/µs slew rate maintain pulse fidelity without overshoot or ringing. | Use Scenario: Driving the input of 16-bit SAR ADCs like LTC2378-16 in precision data acquisition. IC Role / Device Role / Timing Role: Unity-gain stable driver with rail-to-rail output and 350MHz bandwidth. Use Value: –80dB harmonic distortion at 10MHz ensures >90dB SFDR for wideband signal digitization. |
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 1.3GHz GBW but 200fA IB (40× higher); 10-lead MSOP package only. | Better for RF gain stages; less suitable for femtoamp-level photodiode TIAs. | Select ADA4817-2ARMZ only when bandwidth >500MHz is mandatory and input leakage <10fA is not critical. |
| OPA2810IDGKT | Lower 4.2nV/√Hz noise but 2pA max IB at 125°C; 8-lead VSSOP package. | Preferred for cost-sensitive industrial sensors where 125°C operation is needed but fA-level bias current is not required. | Choose OPA2810IDGKT when total system noise budget allows >100× higher input bias current and DFN thermal performance is not essential. |
Compared with ADA4817-2ARMZ and OPA2810IDGKT, the LTC6269HDD#PBF uniquely balances femtoamp input bias, 450fF input capacitance, and 125°C operation in a thermally enhanced DFN - making it irreplaceable for high-precision optical front-ends demanding long-term DC stability.
Availability
LTC6269HDD#PBF is available at Aetrix Electronics and suitable for photodiode transimpedance amplifiers, CCD output buffering, and photomultiplier tube post-amplification requiring stable component supply across automotive, medical imaging, and scientific instrumentation programs.
Supply support for LTC6269HDD#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 bias current op amp product line, engineered specifically for photonics, analytical chemistry, and high-impedance sensor interfaces where femtoamp-level leakage and sub-pF capacitance directly impact measurement accuracy.
FAQ
What is the maximum operating junction temperature for LTC6269HDD#PBF?
The LTC6269HDD#PBF has a maximum junction temperature (TJMAX) of 150°C, with θJA = 43°C/W when the exposed V– pad is properly soldered to a PCB ground plane. This thermal rating supports continuous operation in under-hood automotive environments and sealed industrial enclosures where ambient temperatures reach 125°C.
Does LTC6269HDD#PBF require external compensation for unity-gain stability?
No, the LTC6269HDD#PBF is unity-gain stable per its datasheet specifications. It achieves this through internal compensation optimized for 350MHz –3dB bandwidth at AV = 1, eliminating need for external capacitors in standard configurations - though feedback capacitance (CF) may still be required in transimpedance amplifier layouts to counteract parasitic CIN.
Can LTC6269HDD#PBF operate with split supplies?
Yes, LTC6269HDD#PBF supports split supplies as long as the total voltage between V+ and V– remains within 3.1V to 5.25V. For example, ±2.5V supplies (5V total) are valid. Input common-mode range extends from V– to V+ – 0.5V, and rail-to-rail output swing is maintained regardless of supply configuration.
What is the input offset voltage drift specification for LTC6269HDD#PBF?
The LTC6269HDD#PBF has a maximum input offset voltage drift of 4µV/°C over its full –40°C to 125°C operating range. This low drift, combined with ±0.7mV max VOS at 25°C, ensures minimal baseline drift in precision DC-coupled sensor interfaces such as electrophysiology amplifiers or pH meter front-ends.
How does the shutdown function behave on LTC6269HDD#PBF?
The LTC6269HDD#PBF features independent active-low shutdown pins (SDA for Channel A, SDB for Channel B). Pulling either pin ≤0.75V disables its respective amplifier, reducing supply current to 0.85mA per channel. When unconnected, both channels remain enabled. Turn-off time is 480ns; turn-on time is 580ns - measured from SHDN edge to 90% output recovery.
LTC6269HDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN 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 ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LTC6269HDD#PBF FAQ
1.How can I place an order for LTC6269HDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6269HDD#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 LTC6269HDD#PBF reliable?
The price and inventory of LTC6269HDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6269HDD#PBF is usually 5 days.
3.What payment methods are accepted for LTC6269HDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6269HDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6269HDD#PBF?
LTC6269HDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6269HDD#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 LTC6269HDD#PBF?
For technical support, including LTC6269HDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6269HDD#PBF requirements.
6.How does Aetrix verify that LTC6269HDD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6269HDD#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 LTC6269HDD#PBF meets industry standards.
7.What is the process for return or replacement of LTC6269HDD#PBF?
All LTC6269HDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6269HDD#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 LTC6269HDD#PBF part is unused and in its original packaging.
Return procedure for LTC6269HDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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