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Analog Devices Inc. LTC6417IUDC#PBF
- Part No.:
- LTC6417IUDC#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
LTC6417IUDC#PBF.pdf
- Description:
- IC BUFFER 1 CIRCUIT 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,955
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Product details
Overview
LTC6417IUDC#PBF from Analog Devices (formerly Linear Technology) is a high-speed differential unity-gain buffer IC designed for driving 14- and 16-bit pipeline ADCs with ultra-low noise (1.5nV/√Hz) and exceptional linearity (–80dBc IM3 at 140MHz, 46dBm OIP3). It operates from a single 4.75V–5.25V supply, delivers 4.28VP-P differential swing into 50Ω, and features programmable output clamping and DC-coupled signal path - ideal for IF sampling in communications receivers and high-fidelity data acquisition systems.
For engineers reviewing the LTC6417IUDC#PBF datasheet, LTC6417IUDC#PBF pinout, LTC6417IUDC#PBF application, or LTC6417IUDC#PBF equivalent, key selection considerations include its 1.6GHz –3dB bandwidth, 24mA shutdown current, flow-through QFN-20 pinout optimized for adjacent ADC placement, and VCM-controlled common-mode output offset for AC-coupled interfaces.
Technical Context
The LTC6417IUDC#PBF implements a fully differential, current-feedback-based amplifier architecture with internally biased inputs and a dedicated VCM pin to set output common-mode voltage. Its fast-recovery output clamping (5ns engage, 1ns release) is controlled via CLHI and referenced to internal symmetric low-side limits, while the VOR pin provides overrange signaling with 200MHz bandwidth.
It supports dual power optimization: PWRADJ reduces supply current from 123mA to 74mA, and SHDN enables hardware shutdown to 24mA. The device maintains stable performance across –40°C to 105°C (industrial grade), with specified DC parameters including ±4mV input offset, 18.5kΩ differential input resistance, and 65dB PSRR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3dB Bandwidth | 1.6GHz - enables baseband-to-IF signal conditioning up to 600MHz+ without gain peaking or phase distortion. |
| Differential Output Swing | 4.28VP-P into 50Ω - delivers full-scale drive for 16-bit ADCs without external gain stages. |
| Input Voltage Noise | 1.5nV/√Hz - preserves SNR in high-resolution sampling chains where thermal noise dominates. |
| OIP3 @ 140MHz | 46dBm - ensures minimal intermodulation distortion in crowded RF front-ends and spectrum analyzers. |
| Supply Current (Active) | 123mA typical - balances speed and power for continuous high-dynamic-range operation. |
| Shutdown Current | 24mA - allows rapid power gating during idle cycles without compromising wake-up latency (15ns enable time). |
| Common-Mode Range (VCM) | 0.1V to 2.4V - supports flexible interface matching to ADC reference voltages or transformer-coupled inputs. |
Pinout & Package
The LTC6417IUDC#PBF is housed in a thermally enhanced 20-lead 3mm × 4mm plastic QFN package with exposed pad (Pin 21 = GND). Pin layout follows a flow-through arrangement: inputs (IN+, IN–) on left side, outputs (OUT+, OUT–) on right, and control pins (VCM, CLHI, SHDN, PWRADJ, VOR) distributed for minimal routing crosstalk and optimal ADC adjacency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN– | Differential Input | High-impedance (18.5kΩ diff) inputs with internal bias; accept DC- or AC-coupled signals up to 2.4V single-ended. |
| OUT+, OUT– | Differential Output | Low-impedance (3Ω diff) outputs drive 50Ω loads directly; common-mode offset set by VCM pin. |
| VCM | Common-Mode Control | Sets output common-mode voltage (0.29V–2.25V range); default 1.25V when floating. |
| CLHI | Output Clamp High Threshold | Analog input setting maximum positive output swing; clamping engages within 5ns of overdrive. |
| VOR | Overrange Indicator | Open-drain output asserts low when clamps are active; 200MHz bandwidth supports fast fault detection. |
| SHDN | Hardware Shutdown Enable | Active-low digital input; reduces supply current to 24mA and disables outputs within 40ns. |
| PWRADJ | Power Adjustment | Analog input scaling supply current from 74mA to 123mA; default 1.5V when floating. |
| V+, GND | Power Supply | Single 4.75V–5.25V rail; exposed pad must be soldered to PCB ground for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Enables direct placement adjacent to Linear/Analog Devices' high-speed ADCs (e.g., LTC2209), minimizing trace length and parasitic inductance. |
| Programmable output clamping | Adjustable high-swing limit (CLHI) with symmetric low-swing limit and sub-5ns response prevents ADC input overload without external diodes. |
| DC-coupled signal path | Eliminates coupling capacitors and associated low-frequency drift, enabling true baseband and zero-IF applications. |
| VCM-controlled common-mode output | Allows precise alignment of output common-mode voltage to ADC input requirements, even with transformer-coupled or resistor-terminated sources. |
| Industrial temperature grade | Specified performance from –40°C to 105°C case temperature, validated for embedded instrumentation and aerospace data links. |
Applications
| Communications Receiver IF Stage | High-Speed Data Acquisition System |
|---|---|
Use Scenario: Driving the analog input of an LTC2209 16-bit ADC sampling at 153.6Msps in a 140MHz IF receiver chain. IC Role / Device Role / Timing Role: Differential buffer providing gain-of-1, low-noise amplification and fast clamping to protect ADC input during signal transients. Use Value: Achieves 75.4dB SNR and 88dBc SFDR at –1dBFS, enabled by 1.5nV/√Hz noise and –80dBc IM3 at 140MHz. | Use Scenario: Conditioning sensor outputs (e.g., CCD, photodiode arrays) before digitization in precision test equipment. IC Role / Device Role / Timing Role: Unity-gain driver isolating sensitive analog front-end from ADC input capacitance and nonlinearities. Use Value: Maintains >90dB CMRR and <±4mV offset across temperature, ensuring measurement accuracy without calibration drift. |
| Radar Signal Processing Front-End | High-Fidelity Spectrum Analyzer Input Stage |
Use Scenario: Buffering wideband pulsed RF signals (DC–600MHz) prior to digitization in L-band radar receivers. IC Role / Device Role / Timing Role: High-linearity, low-distortion driver preserving pulse fidelity and dynamic range under large-signal conditions. Use Value: Delivers –60dBc HD3 and 34dBm OIP3 at 600MHz, supporting accurate pulse amplitude and timing analysis. | Use Scenario: Driving the input of a 14-bit ADC in a benchtop spectrum analyzer requiring >70dB spurious-free dynamic range. IC Role / Device Role / Timing Role: Low-noise, high-OIP3 buffer enabling clean capture of weak signals adjacent to strong interferers. Use Value: 46dBm OIP3 at 140MHz and 1.5nV/√Hz noise floor minimize internally generated distortion and thermal noise floor elevation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential ADC driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4940-1ARZ | Lower bandwidth (1GHz), higher input bias current (±3.5µA), no integrated clamping or VOR pin. | Better suited for lower-frequency, cost-sensitive designs where clamping is implemented externally. | Select when system-level clamping is already present and 1GHz bandwidth suffices. |
| LMH5401RTVR | Higher supply current (160mA), wider supply range (3.3V–5.25V), no PWRADJ or SHDN pins. | Optimized for 3.3V systems and ultra-high slew rate (11,000V/µs), but lacks power management features. | Select for 3.3V-only designs requiring >10,000V/µs slew rate and no low-power modes. |
Compared with ADA4940-1ARZ and LMH5401RTVR, the LTC6417IUDC#PBF uniquely integrates fast programmable clamping, VCM control, and dual-stage power adjustment (PWRADJ + SHDN) in a compact QFN-20, making it optimal for space-constrained, high-dynamic-range IF sampling systems requiring robustness and configurability.
Availability
LTC6417IUDC#PBF is available at Aetrix Electronics and suitable for high-speed data acquisition, communications infrastructure, radar signal processing, and precision instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LTC6417IUDC#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 LTC6417IUDC#PBF belongs to ADI's high-speed amplifier product line, engineered specifically for ultra-low-noise, high-linearity differential signal conditioning in demanding RF and data converter applications.
FAQ
What is the operating temperature range for the LTC6417IUDC#PBF?
The LTC6417IUDC#PBF is rated for industrial operation from –40°C to 105°C case temperature (TC), with full performance guaranteed across this range per datasheet Note 3. This makes it suitable for deployment in harsh environments such as base station radios, avionics data recorders, and industrial test equipment where ambient temperatures exceed commercial-grade limits.
How does the VCM pin affect the output common-mode voltage of the LTC6417IUDC#PBF?
The VCM pin on the LTC6417IUDC#PBF directly sets the output common-mode voltage (VOUTCM) with a gain of 0.82V/V. When VCM is set to 1.25V, VOUTCM defaults to approximately 1.2V; the actual value varies between 0.29V (at VCM = 0.1V) and 2.25V (at VCM = 2.4V). This allows precise matching to the input common-mode requirement of downstream ADCs like the LTC2209 without external level-shifting circuitry.
Can the LTC6417IUDC#PBF drive a 50Ω differential load without external components?
Yes, the LTC6417IUDC#PBF is explicitly designed to drive a 50Ω differential load directly, delivering up to 4.28VP-P output swing with –80dBc IM3 and 46dBm OIP3 at 140MHz. Its low 3Ω differential output impedance and flow-through pinout eliminate the need for series resistors or external termination networks in standard 50Ω system architectures.
What is the purpose of the CLHI and VOR pins on the LTC6417IUDC#PBF?
The CLHI pin sets the upper threshold for the LTC6417IUDC#PBF's fast output clamping circuit (engagement in 5ns), while the VOR pin is an open-drain indicator that asserts low when either clamp is active. Together, they provide hardware-level protection for downstream ADC inputs and real-time overrange detection without software intervention - critical for burst-mode or transient-heavy signal paths.
Does the LTC6417IUDC#PBF support DC-coupled operation?
Yes, the LTC6417IUDC#PBF supports true DC-coupled operation with no external biasing required. Its inputs are internally biased, and the output common-mode voltage is controlled via the VCM pin. The device maintains specified DC performance - including ±4mV input offset and 63dB CMRR - across the full –40°C to 105°C range, enabling precision baseband and zero-IF applications.
LTC6417IUDC#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- Amplifier Type:
- Buffer
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 10000V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.6 GHz
- Current - Input Bias:
- 2 µA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 123mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.75 V
- Voltage - Supply Span (Max):
- 5.25 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x4)
LTC6417IUDC#PBF FAQ
1.How can I place an order for LTC6417IUDC#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6417IUDC#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 LTC6417IUDC#PBF reliable?
The price and inventory of LTC6417IUDC#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6417IUDC#PBF is usually 5 days.
3.What payment methods are accepted for LTC6417IUDC#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6417IUDC#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6417IUDC#PBF?
LTC6417IUDC#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6417IUDC#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 LTC6417IUDC#PBF?
For technical support, including LTC6417IUDC#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6417IUDC#PBF requirements.
6.How does Aetrix verify that LTC6417IUDC#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6417IUDC#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 LTC6417IUDC#PBF meets industry standards.
7.What is the process for return or replacement of LTC6417IUDC#PBF?
All LTC6417IUDC#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6417IUDC#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 LTC6417IUDC#PBF part is unused and in its original packaging.
Return procedure for LTC6417IUDC#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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