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Analog Devices Inc. HMC676LC3CTR-R5
- Part No.:
- HMC676LC3CTR-R5
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 16-LFQFN Exposed Pad
- Datasheet:
-
HMC676LC3CTR-R5.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 16SMT
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
HMC676LC3CTR-R5 from Analog Devices (formerly Hittite Microwave) is a SiGe monolithic latched comparator with RSECL output stage, designed for ultra-high-speed signal acquisition in 10 Gbps data paths. It delivers 100 ps propagation delay, 60 ps minimum input pulse width, and 0.2 ps rms random jitter, operating with ±1.75 V differential input range and driving 400 mV into 50 Ω terminated to –2 V - ideal for clock/data restoration in high-speed test and communications systems.
For engineers reviewing the HMC676LC3CTR-R5 datasheet, HMC676LC3CTR-R5 pinout, HMC676LC3CTR-R5 application, or HMC676LC3CTR-R5 equivalent, key selection criteria include latch-mode vs. track-mode operation, resistor-programmable hysteresis, RSECL output compatibility with –2 V termination, and thermal performance under 120 mW dissipation at –40 °C to +85 °C.
Technical Context
The HMC676LC3CTR-R5 integrates three functional blocks: a high-gain input amplifier, a level-sensitive single-shot latch, and an RSECL output buffer. Its latch control uses complementary LE/LE_bar inputs with 8 kΩ impedance and supports both transparent (track) and hold (latch) modes based on differential latch enable state.
Input stage features 50 Ω differential impedance, 350 kΩ common-mode impedance, and 15 µV/°C offset drift; output stage delivers 320–400 mV differential swing with 23 ps rise / 13 ps fall time (20%–80%), while PSRR is 38 dB on both Vcci and Vee rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Equivalent Input Bandwidth | 10 GHz typical - enables accurate digitization of sub-100 ps pulses in broadband ATE and instrumentation. |
| Propagation Delay | 100 ps typical - ensures deterministic timing alignment in 10 Gbps serial data recovery paths. |
| Random Jitter (RJ) | 0.2 ps rms at 10 Gbps - minimizes eye closure in high-speed clock and data restoration circuits. |
| Minimum Pulse Width | 60 ps - supports detection of ultra-narrow pulses in pulse spectroscopy and trigger applications. |
| Power Dissipation | 120 mW at TA = +25 °C - requires thermal management via exposed paddle soldered to Vee ground plane. |
| Hysteresis Control | Resistor-programmable via HYS pin - allows precise noise immunity tuning without external components. |
| Output Swing | 350 mV typical into 50 Ω terminated to –2 V - directly interfaces with standard RSECL logic receivers. |
Pinout & Package
16-lead 3×3 mm ceramic SMT package (alumina body, gold-over-nickel plating, MSL3), with exposed paddle requiring solder connection to Vee (–3 V) for thermal and ESD performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4 | VTP / VTN | Termination return pins for INP/INN - must be connected to respective input termination reference (e.g., –2 V or 2 V). |
| 2, 3 | INP / INN | Differential analog inputs with 50 Ω impedance - accept ±1.75 V differential swing and support AC/DC coupling. |
| 5, 16 | Vcci | +3.3 V supply for input stage - decoupling required near pins to suppress supply noise. |
| 6, 7 | LE / LE_bar | Complementary latch enable inputs - define track (LE–LE_bar low) or latch (LE–LE_bar high) mode; 8 kΩ input impedance. |
| 9, 12 | Vcco | 0 V output stage supply - sets RSECL logic high/low levels when terminated to –2 V. |
| 10, 11 | Q / Q_bar | Complementary RSECL outputs - deliver 350 mV swing, 23 ps rise / 13 ps fall time into 50 Ω loads. |
| 13 | Vee | –3 V negative supply - exposed paddle must be soldered to this node for thermal conduction and ESD path. |
| 14 | HYS | Hysteresis control - open for zero hysteresis; resistor to Vee sets hysteresis per graph (e.g., 10 kΩ ≈ ±1 mV). |
Key Features
| Feature | Design Value |
|---|---|
| Latch/Track Mode Selectability | Configurable via LE/LE_bar differential state - eliminates need for external mode-control logic in adaptive sampling systems. |
| RSECL Output Stage | Drives 400 mV into 50 Ω terminated to –2 V - enables direct interfacing with legacy ECL/PECL receivers without level-shifting. |
| Programmable Hysteresis | Set by single external resistor on HYS pin - provides adjustable noise margin without adding board area or BOM cost. |
| Low Overdrive Dispersion | 10 ps typical - ensures consistent timing across varying input amplitudes, critical for jitter-sensitive ATE applications. |
| High Input Bandwidth | 10 GHz equivalent input bandwidth - preserves fast edge integrity in >10 Gbps data acquisition front-ends. |
Applications
| ATE High-Speed Testing | Digital Receiver Front-End |
|---|---|
|
Use Scenario: Capturing 10 Gbps test patterns in automated wafer probe stations with sub-100 ps timing resolution. IC Role / Device Role / Timing Role: Latched comparator performing high-fidelity data sampling synchronized to precision strobe clocks. Use Value: 60 ps minimum pulse width and 100 ps propagation delay enable reliable capture of narrow test pulses without aliasing or metastability. |
Use Scenario: Recovering clock and data from degraded optical or RF baseband signals in coherent receiver subsystems. IC Role / Device Role / Timing Role: Clock/data restoration element converting analog waveforms into clean digital logic for downstream SerDes. Use Value: 0.2 ps rms random jitter and 10 GHz input bandwidth preserve signal integrity during retiming, minimizing BER degradation. |
| Pulse Spectroscopy Systems | High-Speed Trigger Generation |
|
Use Scenario: Detecting nanosecond-scale transient events in laser-induced breakdown spectroscopy or particle detection. IC Role / Device Role / Timing Role: Ultrafast threshold detector triggering acquisition windows with picosecond-level timing precision. Use Value: 10 ps overdrive dispersion and 100 ps propagation delay ensure repeatable trigger latency independent of pulse amplitude. |
Use Scenario: Generating synchronous start pulses for oscilloscopes, digitizers, or time-of-flight measurement units. IC Role / Device Role / Timing Role: Edge-detecting comparator providing deterministic, low-jitter trigger outputs aligned to input transitions. Use Value: 23 ps Q rise time and 13 ps Q fall time produce sharp, well-defined trigger edges compatible with <100 ps system timing budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar latched comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADCMP572BCPZ-R7 | CMOS output, 2.5 V supply, 85 ps propagation delay, no latch mode - operates only as tracking comparator. | Requires external latch or FPGA capture logic; unsuitable for standalone latched sampling at 10 Gbps. | Select when lower power (45 mW) and CMOS interfacing are prioritized over latch functionality and RSECL drive. |
| HMC874LC3C | Same 3×3 mm package, 12 GHz bandwidth, 90 ps propagation delay, but lacks programmable hysteresis and uses PECL outputs (–1.3 V termination). | Higher speed but incompatible termination scheme; requires redesign of output load network and biasing. | Select when >10 GHz bandwidth is mandatory and system already supports PECL signaling with –1.3 V termination. |
Compared with ADCMP572BCPZ-R7 and HMC874LC3C, the HMC676LC3CTR-R5 uniquely combines latch mode, RSECL output with –2 V termination, and resistor-programmable hysteresis in a thermally optimized 3×3 mm package - making it the only drop-in solution for legacy Hittite-based 10 Gbps ATE and instrumentation designs requiring minimal layout change.
Availability
HMC676LC3CTR-R5 is available at Aetrix Electronics and suitable for high-speed ATE systems, digital receiver front-ends, and pulse spectroscopy instruments requiring stable component supply across extended production lifecycles.
Supply support for HMC676LC3CTR-R5 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 acquired Hittite Microwave in 2014 and maintains its high-frequency RF and microwave product lines, emphasizing performance-critical signal chain components for defense, test, and communications.
The HMC676LC3CTR-R5 belongs to Hittite's legacy high-speed comparator family, engineered specifically for sub-100 ps timing accuracy in automated test equipment and broadband instrumentation where deterministic jitter and latch-controlled sampling are essential.
FAQ
What is the operating temperature range for the HMC676LC3CTR-R5?
The HMC676LC3CTR-R5 is specified to operate from –40 °C to +85 °C ambient temperature. Junction temperature must not exceed 125 °C, and thermal design must account for 120 mW power dissipation using the exposed paddle soldered to Vee. Derating begins above 85 °C at 20.4 mW/°C, as defined in the absolute maximum ratings table. This range supports deployment in industrial-grade ATE and instrumentation environments.
Does the HMC676LC3CTR-R5 support both latch and track modes, and how is mode selection implemented?
Yes, the HMC676LC3CTR-R5 supports both latch (hold) and track (transparent) modes. Mode selection is controlled differentially via the LE and LE_bar pins: latch mode activates when LE–LE_bar is high; track mode activates when LE–LE_bar is low or both pins are floating. The latch is level-sensitive, not edge-triggered, and internal timing parameters (e.g., tS = 45 ps setup, tH = –42 ps hold) define valid acquisition windows. This dual-mode capability is intrinsic to the HMC676LC3CTR-R5 architecture and requires no external configuration registers.
What is the recommended termination for the RSECL outputs of the HMC676LC3CTR-R5?
The HMC676LC3CTR-R5 RSECL outputs require 50 Ω termination to –2 V (Vcco – 2 V), delivering a nominal 350 mV differential swing. Vcco is supplied at 0 V, so termination resistors must connect between each Q/Q_bar output and a –2 V rail. Input termination (INP/INN) may be referenced to –2 V (for DC coupling) or ground (for AC coupling), depending on source common-mode voltage. Proper termination is essential to achieve specified jitter, propagation delay, and output swing values in the HMC676LC3CTR-R5.
How is hysteresis configured on the HMC676LC3CTR-R5, and what is its practical impact?
Hysteresis on the HMC676LC3CTR-R5 is configured by connecting a resistor (Rhys) between the HYS pin and Vee (–3 V); open circuit yields zero hysteresis. Per the hysteresis vs. Rhys graph, a 10 kΩ resistor provides ~±1 mV hysteresis, improving noise immunity without degrading propagation delay. This feature directly reduces false triggering in noisy high-speed environments such as ATE test heads or RF receiver IF stages - a key differentiator of the HMC676LC3CTR-R5 versus fixed-threshold comparators.
Is the HMC676LC3CTR-R5 pin-compatible with other Hittite comparators like the HMC674LC3C or HMC874LC3C?
No, the HMC676LC3CTR-R5 is not pin-compatible with HMC674LC3C or HMC874LC3C. While all use the same 16-lead 3×3 mm package footprint, pin functions differ significantly: HMC676LC3CTR-R5 assigns pins 6/7 to complementary LE/LE_bar, whereas HMC874LC3C uses those pins for Vee and output enables. Additionally, HMC676LC3CTR-R5 places Vee on pin 13 with mandatory paddle connection, unlike HMC674LC3C's Vee distribution. Board-level replacement requires full schematic and layout revision - the HMC676LC3CTR-R5 must be treated as a unique pinout.
HMC676LC3CTR-R5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 16-LFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- -
- Voltage - Supply, Single/Dual (±):
- 3.3V
- :
- 5mV
- Voltage - Input Offset (Max):
- 15µA
- Current - Input Bias (Max):
- 40mA
- Current - Output (Typ):
- 8mA
- Current - Quiescent (Max):
- 38dB PSRR
- CMRR, PSRR (Typ):
- 0.13ns
- Propagation Delay (Max):
- 1mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 16-SMT (3x3)
HMC676LC3CTR-R5 FAQ
1.How can I place an order for HMC676LC3CTR-R5 through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC676LC3CTR-R5 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 HMC676LC3CTR-R5 reliable?
The price and inventory of HMC676LC3CTR-R5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC676LC3CTR-R5 is usually 5 days.
3.What payment methods are accepted for HMC676LC3CTR-R5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC676LC3CTR-R5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC676LC3CTR-R5?
HMC676LC3CTR-R5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC676LC3CTR-R5 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 HMC676LC3CTR-R5?
For technical support, including HMC676LC3CTR-R5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC676LC3CTR-R5 requirements.
6.How does Aetrix verify that HMC676LC3CTR-R5 is sourced from the original manufacturer or authorized distributors?
All HMC676LC3CTR-R5 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 HMC676LC3CTR-R5 meets industry standards.
7.What is the process for return or replacement of HMC676LC3CTR-R5?
All HMC676LC3CTR-R5 units undergo pre-shipment inspection (PSI). If there is an issue with HMC676LC3CTR-R5, 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 HMC676LC3CTR-R5 part is unused and in its original packaging.
Return procedure for HMC676LC3CTR-R5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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