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Analog Devices Inc. HMC675LP3E
- Part No.:
- HMC675LP3E
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
HMC675LP3E.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,066
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Product details
Overview
HMC675LP3E from Analog Devices (formerly Hittite Microwave) is a SiGe monolithic latched comparator with 10 GHz equivalent input bandwidth, 100 ps propagation delay, and reduced-swing CML (RSCML) outputs. It operates in latch or track mode, supports 10 Gbps data rates, and delivers 0.2 ps rms random jitter - ideal for high-speed ATE and clock/data restoration systems.
For engineers reviewing the HMC675LP3E datasheet, HMC675LP3E pinout, HMC675LP3E application, or HMC675LP3E equivalent, key selection criteria include latch enable timing (45 ps setup, –42 ps hold), resistor-programmable hysteresis, differential input impedance (15 kΩ), RSCML output drive (400 mV into 50 Ω), and –40 °C to +85 °C operating range.
Technical Context
The HMC675LP3E integrates three functional blocks: a high-gain input amplifier, a level-sensitive single latch, and an RSCML output buffer. Its latch control uses complementary LE/LE_bar inputs with 8 kΩ input impedance and supports both transparent (track) and hold (latch) modes based on differential latch enable state.
Input stage features 50 Ω differential impedance and ±1.75 V differential voltage range; output stage delivers 400 mV swing into 50 Ω terminated to ground, with Q/QB rise/fall times of 27 ps/18 ps. Power supply configuration requires Vcci = +3.3 V, Vcco = 0 V, and Vee = –3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Equivalent Input Bandwidth | 10 GHz - enables accurate digitization of ultrafast analog transients up to ~100 ps risetime signals |
| Propagation Delay | 100 ps typ. - ensures minimal latency in high-speed decision circuits like serial data recovery |
| Minimum Pulse Width | 60 ps - supports reliable latching of sub-100 ps logic pulses in pulse spectroscopy or trigger applications |
| Random Jitter (RJ) | 0.2 ps rms at 10 Gbps - critical for maintaining eye opening in high-speed serial links |
| Output Swing | 400 mV into 50 Ω - directly interfaces with standard CML/PECL receivers without external termination or level-shifting |
| Hysteresis Control | Resistor-programmable via HYS pin - allows precise noise immunity tuning from 0 mV to >10 mV depending on Rhys value |
| Power Dissipation | 100 mW - enables dense placement in RF instrumentation without excessive thermal management |
Pinout & Package
16-lead 3×3 mm SMT package (9 mm² footprint) with exposed paddle requiring connection to Vee (–3 V). RoHS-compliant low-stress plastic body, matte Sn lead finish, MSL1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4 | VTP / VTN | Termination return pins for INP/INN - must be tied to appropriate bias voltage (e.g., 2 V for DC-coupled clocks) or ground (for AC-coupled) |
| 2, 3 | INP / INN | Differential analog inputs with 50 Ω impedance - accept ±1.75 V differential swing and support common-mode range of –1.75 V to +1.75 V |
| 5, 16 | Vcci | +3.3 V supply for input amplifier - decoupling required near pins to maintain 10 GHz bandwidth stability |
| 6, 7 | LE / LE_bar | Complementary latch enable inputs - define latch vs. track mode; 8 kΩ input impedance allows flexible termination options |
| 9, 12 | Vcco | 0 V output stage supply - establishes RSCML reference for 400 mV swing into 50 Ω to ground |
| 10, 11 | Q / QB | Differential RSCML outputs - provide true/complement logic states with 27 ps rise / 18 ps fall times |
| 13 | Vee | –3 V negative supply - must connect to exposed paddle for thermal and electrical integrity |
| 14 | HYS | Hysteresis control terminal - 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 Selection | Configurable via LE/LE_bar differential state - eliminates need for external mode-control logic in adaptive sampling systems |
| Resistor-Programmable Hysteresis | Adjustable from 0 mV to >10 mV using single external resistor - enables optimization for varying SNR conditions without redesign |
| RSCML Output Stage | 400 mV swing into 50 Ω - reduces power vs. full-swing CML while maintaining compatibility with industry-standard receivers |
| Low Timing Dispersion | 10 ps overdrive/slew rate dispersion - ensures consistent decision timing across wide input signal amplitudes |
| High Input Bandwidth | 10 GHz equivalent input bandwidth - preserves fidelity of fast-risetime signals in broadband test equipment front-ends |
Applications
| ATE Signal Acquisition | Digital Receiver Front-End |
|---|---|
Use Scenario: Capturing nanosecond-scale waveform edges during IC parametric testing under automated test equipment control. IC Role / Device Role / Timing Role: High-speed latched comparator performing real-time threshold decisions on DUT output signals at up to 10 Gbps. Use Value: 60 ps minimum pulse width and 100 ps propagation delay enable accurate capture of short-duration test pulses without timing ambiguity. |
Use Scenario: Converting analog IF or baseband signals to digital logic levels prior to FPGA-based demodulation in microwave receivers. IC Role / Device Role / Timing Role: Clock- and data-recovery (CDR)-adjacent comparator providing clean, jitter-minimized decision outputs for downstream logic. Use Value: 0.2 ps rms random jitter and deterministic jitter <2 ps preserve eye integrity for reliable bit-error-rate performance at 10 Gbps. |
| Pulse Spectroscopy Triggering | High-Speed Instrumentation Clock Recovery |
Use Scenario: Generating precise trigger events from ultrafast laser-induced transient signals in time-resolved spectroscopy setups. IC Role / Device Role / Timing Role: Latched comparator acting as low-jitter, high-bandwidth discriminator for sub-100 ps optical pulse detection. Use Value: 10 GHz input bandwidth and 10 ps overdrive dispersion ensure consistent triggering across varying pulse amplitudes and shapes. |
Use Scenario: Restoring degraded clock signals from high-loss interconnects in oscilloscopes or bit-error-rate testers. IC Role / Device Role / Timing Role: Comparator-based clock regenerator using track/latch mode to reconstruct jitter-filtered clock edges. Use Value: Programmable hysteresis and 45 ps setup time allow robust operation even with noisy or attenuated clock inputs. |
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 | Lower 6.5 GHz bandwidth; 130 ps propagation delay; CMOS output (not RSCML); no latch enable | Targeted at general-purpose high-speed comparison, not 10 Gbps latch-synchronized acquisition | Choose when RSCML interface or sub-100 ps timing is not required and cost sensitivity dominates |
| HMC874LC3C | Same SiGe process; 13 GHz bandwidth; 85 ps propagation delay; fixed hysteresis only; no programmable latch mode | Optimized for fixed-function clock/data recovery, not configurable ATE or instrumentation use cases | Choose when maximum bandwidth and lowest delay are critical, and latch mode flexibility is unnecessary |
Compared with ADCMP572BCPZ-R7 and HMC874LC3C, the HMC675LP3E uniquely balances 10 GHz bandwidth, programmable hysteresis, dual-mode (latch/track) operation, and RSCML output compatibility - making it the only option supporting adaptive high-speed acquisition in ATE and reconfigurable receiver designs.
Availability
HMC675LP3E is available at Aetrix Electronics and suitable for ATE signal acquisition, digital receiver front-ends, pulse spectroscopy triggering, high-speed instrumentation clock recovery, and broadband communications requiring stable component supply across industrial temperature ranges.
Supply support for HMC675LP3E 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 precision analog, RF, and mixed-signal solutions for demanding test, defense, and communications applications.
The HMC675LP3E belongs to Hittite's legacy high-speed comparator family designed specifically for 10+ Gbps test instrumentation, broadband communications infrastructure, and time-critical measurement systems requiring sub-100 ps timing fidelity.
FAQ
What is the operating temperature range for the HMC675LP3E?
The HMC675LP3E is specified for operation from –40 °C to +85 °C ambient temperature. This range is validated across all key parameters including propagation delay, jitter, and input offset voltage. The device's thermal resistance (junction-to-lead) is 23 °C/W, and derating begins above 85 °C at 43.5 mW/°C. Full performance compliance is guaranteed within this industrial-grade envelope for HMC675LP3E.
How does the HMC675LP3E implement latch versus track mode?
The HMC675LP3E selects latch or track mode via the differential state of LE and LE_bar pins: latch mode activates when LE–LE_bar is high (logic HI), holding the output at the input state just before the latch enable transition; track mode activates when LE–LE_bar is low or both pins float, causing Q/QB to follow INP/INN continuously. This dual-mode capability is intrinsic to the HMC675LP3E architecture and requires no external configuration registers or firmware.
What is the purpose of the HYS pin on the HMC675LP3E?
The HYS pin on the HMC675LP3E provides resistor-programmable hysteresis: leaving it open yields zero hysteresis; connecting it to Vee (–3 V) through a resistor (e.g., 10 kΩ to 100 kΩ) introduces controlled hysteresis (1–10 mV typical) to improve noise immunity. The relationship between Rhys and hysteresis voltage is documented in the datasheet graph, enabling precise tuning for specific signal-to-noise conditions in the HMC675LP3E application.
Can the HMC675LP3E drive 50 Ω loads directly?
Yes - the HMC675LP3E's RSCML output stage is designed to drive 50 Ω loads terminated to ground, delivering a nominal 400 mV differential swing. No external resistors or level-shifting circuitry are needed when interfacing with standard CML/PECL receivers. The output voltage levels (Voh ≈ 0 mV, Vol ≈ –400 mV) and 27 ps/18 ps rise/fall times are fully characterized under this 50 Ω load condition for HMC675LP3E.
What power supplies does the HMC675LP3E require?
The HMC675LP3E requires three independent supplies: Vcci = +3.3 V (input stage), Vcco = 0 V (output stage reference), and Vee = –3 V (negative rail). Total power dissipation is 100 mW (9 mA Icci + 8 mA Icco + 24 mA Iee). All supplies must be well-decoupled; the exposed paddle must be soldered to Vee for thermal and electrical integrity in every HMC675LP3E implementation.
HMC675LP3E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 16-VFQFN Exposed Pad
- Series:
- -
- Packaging:
- Strip
- Product Status:
- Active
- 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):
- 20mA
- Current - Output (Typ):
- 9mA
- Current - Quiescent (Max):
- 35dB PSRR
- CMRR, PSRR (Typ):
- 0.13ns
- Propagation Delay (Max):
- 1mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 16-QFN (3x3)
HMC675LP3E FAQ
1.How can I place an order for HMC675LP3E through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC675LP3E 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 HMC675LP3E reliable?
The price and inventory of HMC675LP3E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC675LP3E is usually 5 days.
3.What payment methods are accepted for HMC675LP3E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC675LP3E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC675LP3E?
HMC675LP3E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC675LP3E 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 HMC675LP3E?
For technical support, including HMC675LP3E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC675LP3E requirements.
6.How does Aetrix verify that HMC675LP3E is sourced from the original manufacturer or authorized distributors?
All HMC675LP3E 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 HMC675LP3E meets industry standards.
7.What is the process for return or replacement of HMC675LP3E?
All HMC675LP3E units undergo pre-shipment inspection (PSI). If there is an issue with HMC675LP3E, 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 HMC675LP3E part is unused and in its original packaging.
Return procedure for HMC675LP3E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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