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Analog Devices Inc. LTC6754IUD#PBF
- Part No.:
- LTC6754IUD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 12-WFQFN Exposed Pad
- Datasheet:
-
LTC6754IUD#PBF.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 12QFN
- Quantity:
- Payment:
- Shipping:
Inventory:562
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Product details
Overview
LTC6754IUD#PBF from Analog Devices (formerly Linear Technology) is a high-speed rail-to-rail input comparator with LVDS-compatible differential outputs, designed for timing-critical signal conditioning in high-frequency data paths. It delivers 1.8ns propagation delay, 1ns overdrive dispersion (10mV–125mV), 890Mbps toggle rate, and 1.5psRMS jitter at 245.76MHz - enabling precise clock/data recovery in serial link receivers and time-of-flight measurement systems.
For engineers reviewing the LTC6754IUD#PBF datasheet, LTC6754IUD#PBF pinout, LTC6754IUD#PBF application, or LTC6754IUD#PBF equivalent, key selection considerations include its dual-supply architecture (VCCI/VCCO), adjustable hysteresis via LE/HYST pin, output latching capability, shutdown wake-up time of 120ns, and QFN-12 package with exposed thermal pad tied to VEE.
Technical Context
The LTC6754IUD#PBF employs a fully differential rail-to-rail input stage composed of complementary PNP/NPN pairs, enabling operation across VEE − 0.2V to VCCI + 0.1V. Its internal gain stage drives an LVDS output driver with common-mode feedback that maintains VOCM = 1.26V ± 10mV and VOD = 362mV typical under 5V supply.
It features independent input (VCCI) and output (VCCO) supplies - a defining architectural trait of the QFN variant - allowing isolation between sensitive analog inputs and noisy digital loads, plus flexible logic-level translation. The LE/HYST pin simultaneously controls hysteresis (0–40mV) and enables output latching, while SHDN provides active-low power-down with 1.05mA total shutdown current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 1.8ns typ. at 50mV overdrive - enables sub-nanosecond timing alignment in high-speed sampling and clock regeneration circuits. |
| Overdrive Dispersion | 1ns max. (10mV–125mV) - ensures consistent timing across varying signal amplitudes, critical for jitter-sensitive line receivers. |
| Toggle Rate | 890Mbps typ. - supports direct interface to 10Gbps-class serial data streams when used in CDR front-ends or retimers. |
| Differential Output Voltage | 362mV typ. into 100Ω - matches standard LVDS receiver thresholds without external termination adjustment. |
| Input Supply Range | 2.4V to 5.25V (VCCI–VEE) - accommodates industrial and telecom rails while maintaining rail-to-rail input common-mode range. |
| Shutdown Current | 1.05mA typ. total - reduces system standby power in battery-backed or energy-conscious instrumentation. |
| RMS Jitter | 1.5ps at 245.76MHz, 200mVP–P, 10Hz–122.88MHz BW - meets stringent phase-noise requirements for SONET/OTN and precision TDR applications. |
Pinout & Package
The LTC6754IUD#PBF is housed in a 12-lead 3mm × 3mm plastic QFN package (UD) with exposed thermal pad (Pin 13) soldered to PCB ground plane for thermal management (θJA = 68°C/W). Pin numbering follows top-view orientation with Pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 4) | Positive comparator input | Rail-to-rail capable (VEE − 0.2V to VCCI + 0.1V); differential pair node for high-precision threshold detection. |
| –IN (Pin 5) | Negative comparator input | Complementary input node; matched to +IN for <1ns dispersion and low offset drift (18µV/°C). |
| VCCI (Pin 2) | Input stage positive supply | Isolates input biasing from output noise; enables independent supply scaling (e.g., 5V input / 2.4V output). |
| VCCO (Pin 1) | Output stage positive supply | Drives LVDS output stage; decoupled from VCCI to prevent supply coupling into sensitive analog front-end. |
| VEE (Pins 3, 9, 13) | Negative supply / ground reference | Common return for both stages; exposed pad (Pin 13) must be soldered for thermal and electrical integrity. |
| Q (Pin 12) | Positive LVDS output | Swings VOCM ± VOD/2 (1.26V ± 181mV); requires 100Ω differential termination to maintain LVDS compliance. |
| Q̅ (Pin 10) | Negative LVDS output | Complementary to Q; differential swing defines valid logic state per ANSI/TIA-644-A LVDS standard. |
| SHDN (Pin 7) | Active-low shutdown control | Pulled low ≤0.8V to enter low-power mode; wake-up time 120ns ensures rapid reactivation in burst-mode systems. |
| LE/HYST (Pin 8) | Latch enable / hysteresis adjust | Voltage-controlled: 0mV hysteresis at ≤0.4V; up to 40mV at 0.8V; latches output when pulled low within 2ns setup window. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supplies (VCCI/VCCO) | Enables noise isolation between analog input and digital output domains; supports mixed-voltage system interfacing without level shifters. |
| Adjustable hysteresis (0–40mV) | Eliminates oscillation on slow or noisy inputs; programmable via resistor or voltage on LE/HYST pin - no external components required for default 4.5mV. |
| Output latching | Captures instantaneous comparator state on LE/HYST assertion; holds output during transient input conditions - essential for glitch-free sampling in TDR or pulse-width measurement. |
| 120ns wake-up from shutdown | Allows dynamic power gating in high-throughput data acquisition systems without compromising real-time responsiveness. |
| LVDS-compatible outputs | Meets ANSI/TIA-644-A electrical specs (362mV diff swing, 1.26V common mode) - interoperable with FPGA transceivers, SERDES PHYs, and dedicated LVDS receivers. |
Applications
| Clock and Data Recovery (CDR) | Time Domain Reflectometry (TDR) |
|---|---|
|
Use Scenario: Extracting clean clock and data edges from degraded high-speed serial signals in optical transport or backplane links. IC Role / Device Role / Timing Role: High-speed comparator acting as edge detector in bang-bang CDR phase detector; leverages 1.8ns delay and 1ns dispersion for minimal timing uncertainty. Use Value: Enables stable lock at >800Mbps with sub-picosecond jitter contribution - directly improves bit error rate in 10G Ethernet and CPRI interfaces. |
Use Scenario: Detecting impedance discontinuities along PCB traces or cables by analyzing reflected pulse timing. IC Role / Device Role / Timing Role: Precision threshold comparator capturing nanosecond-scale reflection arrival times; uses rail-to-rail inputs to handle wide common-mode swings on unterminated lines. Use Value: Achieves <10ps timing resolution due to 1.8ns propagation delay and low jitter - enables sub-millimeter fault localization in high-speed interconnects. |
| High-Speed Line Receivers | Window Comparators |
|
Use Scenario: Receiving differential data from long cables or noisy environments with large common-mode interference. IC Role / Device Role / Timing Role: LVDS translator with 77dB CMRR and separate VCCI/VCCO supplies - rejects supply noise while preserving signal integrity. Use Value: Maintains >890Mbps throughput with <2ps skew between Q/Q̅ outputs - eliminates intersymbol interference in multi-gigabit point-to-point links. |
Use Scenario: Monitoring analog sensor outputs (e.g., temperature, pressure) against upper/lower limits in industrial control systems. IC Role / Device Role / Timing Role: Dual-comparator core configured with adjustable hysteresis to prevent chatter near trip points; LE/HYST pin enables synchronized capture of alarm states. Use Value: Programmable 0–40mV hysteresis eliminates false triggers from sensor noise - improves reliability without adding external resistors or op-amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADCMP600BRMZ | Single-supply (2.5V–5.5V), no separate VCCI/VCCO; 1.5ns delay but fixed 2mV hysteresis; no latching function. | Lacks output latching and adjustable hysteresis - unsuitable for sampled-data capture or noisy sensor monitoring. | Select when board space is constrained and dual-supply isolation is unnecessary; verify LVDS compatibility via external termination. |
| LMH7322MR | 3.3V-only supply; 1.9ns delay; 2.5psRMS jitter at 200MHz; integrated 50Ω output termination. | No shutdown or hysteresis control; output stage not LVDS-compliant - requires level-shifting for FPGA interfacing. | Prefer for cost-sensitive, fixed-voltage designs where jitter tolerance >1.5ps is acceptable and LVDS compliance is not required. |
Compared with ADCMP600BRMZ and LMH7322MR, the LTC6754IUD#PBF uniquely combines dual-supply isolation, programmable hysteresis, output latching, and true LVDS output compliance - making it the only option among the three suitable for jitter-critical CDR and synchronized TDR implementations.
Availability
LTC6754IUD#PBF is available at Aetrix Electronics and suitable for clock and data recovery, time domain reflectometry, and high-speed line receiver applications requiring stable component supply, guaranteed temperature performance (–40°C to +85°C), and long-term industrial lifecycle support.
Supply support for LTC6754IUD#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 RF ICs, serving precision instrumentation, communications, and industrial markets.
The LTC6754 belongs to Linear's high-speed comparator product line, engineered specifically for sub-2ns timing accuracy, LVDS interoperability, and robust operation in noise-prone high-frequency signal chains - targeting applications in test equipment, optical networking, and advanced sensing.
FAQ
What is the operating temperature range for the LTC6754IUD#PBF?
The LTC6754IUD#PBF is specified for operation from –40°C to +85°C (Industrial grade). This range is confirmed in the Order Information table and applies to all electrical characteristics unless otherwise noted. The device's thermal design - including the exposed VEE pad in the QFN package - ensures reliable performance across this full range with θJA = 68°C/W.
Does the LTC6754IUD#PBF require external termination for LVDS outputs?
Yes, the LTC6754IUD#PBF requires a 100Ω differential load between Q and Q̅ pins to meet LVDS specifications. The device itself does not integrate termination; the 362mV differential output voltage and 1.26V common-mode voltage are defined under this 100Ω condition. External termination must be placed as close as possible to the receiver to maintain signal integrity at >800Mbps.
How is hysteresis adjusted on the LTC6754IUD#PBF?
Hysteresis on the LTC6754IUD#PBF is adjusted via the LE/HYST pin (Pin 8): floating yields ~4.5mV; connecting to VEE through a resistor sets hysteresis from 0mV to 40mV; applying 0.8V produces maximum hysteresis. The relationship is monotonic and characterized across temperature - no calibration is needed. This same pin also enables output latching when driven low.
Can the LTC6754IUD#PBF operate with different voltages on VCCI and VCCO?
Yes - the LTC6754IUD#PBF is explicitly designed for independent VCCI and VCCO supplies, each ranging from 2.4V to 5.25V relative to VEE. Example configurations include VCCI = 5V / VCCO = 2.4V (maximizing input range while minimizing output power) or VCCI = 3.3V / VCCO = 3.3V (single-rail simplification). Both supplies must remain within absolute maximum ratings (≤5.5V total).
What is the function of the exposed pad (Pin 13) on the LTC6754IUD#PBF?
The exposed pad (Pin 13) on the LTC6754IUD#PBF is electrically connected to VEE and must be soldered to a PCB copper pour tied to system ground. It serves dual purposes: thermal dissipation (reducing θJA from 256°C/W in SC70 to 68°C/W in QFN) and low-impedance grounding for the output stage - critical for maintaining LVDS common-mode stability and minimizing ground bounce at 890Mbps.
LTC6754IUD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 12-WFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- LVDS
- Voltage - Supply, Single/Dual (±):
- 2.4V ~ 5.25V
- :
- 4mV @ 5V
- Voltage - Input Offset (Max):
- 1.5µA
- Current - Input Bias (Max):
- 11mA
- Current - Output (Typ):
- 14.7mA
- Current - Quiescent (Max):
- 77dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 2.8ns
- Propagation Delay (Max):
- 4.5mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 12-QFN (3x3)
LTC6754IUD#PBF FAQ
1.How can I place an order for LTC6754IUD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6754IUD#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 LTC6754IUD#PBF reliable?
The price and inventory of LTC6754IUD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6754IUD#PBF is usually 5 days.
3.What payment methods are accepted for LTC6754IUD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6754IUD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6754IUD#PBF?
LTC6754IUD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6754IUD#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 LTC6754IUD#PBF?
For technical support, including LTC6754IUD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6754IUD#PBF requirements.
6.How does Aetrix verify that LTC6754IUD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6754IUD#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 LTC6754IUD#PBF meets industry standards.
7.What is the process for return or replacement of LTC6754IUD#PBF?
All LTC6754IUD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6754IUD#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 LTC6754IUD#PBF part is unused and in its original packaging.
Return procedure for LTC6754IUD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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