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Texas Instruments LMH7324SQ/NOPB
- Part No.:
- LMH7324SQ/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LMH7324SQ/NOPB.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 32WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,576
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Product details
Overview
LMH7324SQ/NOPB from Texas Instruments is a quad high-speed comparator with RS(P)ECL outputs, 700 ps propagation delay, 20 ps overdrive dispersion, and operation across 5V–12V supply range. It supports ground-sensing on single-supply configurations and delivers 3.72–3.84 Gb/s toggle rates for digital receiver and signal restoration applications.
For engineers reviewing the LMH7324SQ/NOPB datasheet, LMH7324SQ/NOPB pinout, LMH7324SQ/NOPB application, or LMH7324SQ/NOPB equivalent, key selection criteria include propagation delay stability across overdrive (±20 mV to ±1 V), input common-mode range extending 200 mV below VEE, differential output swing of 300–400 mV, and independent VCCI/VCCO supply rails enabling mixed-logic-family interfacing.
Technical Context
The LMH7324SQ/NOPB integrates four independent comparators with fully differential RS(P)ECL output stages referenced to per-channel VCCO supplies, enabling simultaneous interface to multiple logic families (e.g., LVDS at VCCO = 2.5V, PECL at VCCO = 5V). Each channel features internal hysteresis (22.5 mV @ 5V), 54 dB active gain, and 80–83 dB CMRR.
Input topology extends 200 mV below VEE, supporting true ground-referenced sensing with single 5V supply. Output rise/fall times are 140–145 ps (20%–80%), and propagation delay skew between Q/Q outputs is ≤60 ps, ensuring precise timing alignment in high-speed sampling and window detection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 700 ps typical @ 5V supply, 20 mV–1 V overdrive - enables sub-nanosecond decision timing in real-time signal triggering. |
| Overdrive Dispersion | 18–31 ps max - ensures consistent timing across input signal amplitudes, critical for jitter-sensitive data recovery. |
| Supply Range | 5V to 12V (VCCI and VCCO independent) - allows flexible biasing for input stage and output logic family matching. |
| Input Common-Mode Range | Extends 200 mV below VEE - supports single-supply ground-sensing without level-shifting circuitry. |
| Differential Output Swing | 300–400 mV @ 50 Ω load - meets LVDS input thresholds and interfaces directly with RSPECL receivers. |
| Max Toggle Rate | 3.72 Gb/s @ 5V, 3.84 Gb/s @ 12V - supports high-speed serial link monitoring and clock/data recovery front-ends. |
| Operating Temperature | −40°C to +125°C - qualified for industrial and automotive under-hood signal conditioning applications. |
Pinout & Package
LMH7324SQ/NOPB is housed in a 32-pin WQFN package (5 mm × 5 mm, 0.5 mm pitch) with exposed thermal pad (DAP) for enhanced heat dissipation. All VEE pins are internally connected via antiparallel diodes; VCCI and VCCO supplies are fully independent per comparator quadrant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCI (Pins 9,16,25,32) | Positive supply for input stage | Independent rail sets input common-mode range; decoupling required near each pin for noise immunity. |
| VCCO (Pins 1,8,17,24) | Positive supply for output stage | Defines RS(P)ECL/LVDS output voltage levels; adjustable per quadrant to interface different logic families. |
| VEE (Pins 4,5,12,13,20,21,28,29) | Negative supply reference | Eight bonded pins reduce ground inductance; must be low-impedance connection to minimize timing skew. |
| IN+ / IN− (Pins 10/11,14/15,26/27,30/31) | Differential analog inputs | Supports 200 mV below VEE to VCCI−2 V range; internal hysteresis improves noise margin in noisy environments. |
| Q / Q (Pins 2/3,6/7,18/19,22/23) | Complementary RS(P)ECL outputs | Differential pair provides common-mode noise rejection; termination to VCCO−2 V enables 50 Ω transmission line drive. |
| DAP (Pin 33) | Thermal pad | Must be soldered to PCB ground plane for thermal management; improves power handling at full 12V operation. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent channels | Four fully isolated comparators with separate VCCI/VCCO supplies - enables multi-threshold detection in single-package window comparators. |
| RS(P)ECL + LVDS-compatible outputs | Configurable output swing via VCCO setting (e.g., 2.5V for LVDS, 5V for PECL) - eliminates external level translators in mixed-signal systems. |
| Sub-1 ns propagation delay with low dispersion | 700 ps typical, ≤31 ps overdrive dispersion - maintains timing integrity across varying input amplitudes in high-speed sampling clocks. |
| Ground-sensing capability | Input common-mode extends 200 mV below VEE - enables direct connection to 0 V referenced sensors without negative supply generation. |
| Industrial temperature range | −40°C to +125°C operation - supports deployment in base station RF front-ends, motor control feedback loops, and automotive radar modules. |
Applications
| Digital Receiver Front-End | High-Speed Signal Restoration |
|---|---|
Use Scenario: Recovering degraded NRZ data streams in optical or RF receivers where intersymbol interference distorts eye diagrams. IC Role / Device Role / Timing Role: High-speed threshold comparator reconstructing clean digital edges from analog waveforms with minimal added jitter. Use Value: 602 fs RMS jitter and 145 ps rise/fall times preserve signal integrity up to 3.84 Gb/s, enabling reliable clock-data recovery. |
Use Scenario: Restoring logic-level signals corrupted by long PCB traces, crosstalk, or impedance mismatches in FPGA-to-ASIC interconnects. IC Role / Device Role / Timing Role: Low-dispersion comparator regenerating sharp transitions while rejecting common-mode noise on differential pairs. Use Value: 83 dB CMRR and complementary Q/Q outputs suppress >99% of coupled noise, improving BER in high-density routing. |
| Zero-Crossing Detector | High-Speed Sampling Trigger |
Use Scenario: Precise AC line synchronization in switched-mode power supplies and motor phase commutation control. IC Role / Device Role / Timing Role: Ground-sensing comparator detecting voltage polarity reversals with nanosecond resolution. Use Value: Input range extending 200 mV below VEE allows direct connection to 0 V referenced AC sources without bias networks. |
Use Scenario: Generating strobe pulses for analog-to-digital conversion in oscilloscopes and time-domain reflectometers. IC Role / Device Role / Timing Role: Ultra-low-skew quad comparator producing synchronized sample-enable signals across multiple ADC channels. Use Value: ΔtPDLH ≤60 ps and ΔtPDHL ≤40 ps ensure <100 ps inter-channel timing mismatch, critical for interleaved sampling accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADCMP572BCPZ-R7 | Single-channel, 250 ps propagation delay, ECL outputs only; no LVDS support; requires −5.2V VEE. | Better suited for ultra-low-jitter clock distribution, not multi-channel threshold detection. | Select when absolute minimum delay (<250 ps) is prioritized over channel count and supply flexibility. |
| TLV3501AIDBVR | Single-channel, 4.5 ns delay, CMOS outputs, 2.7–5.5V supply; no differential outputs or VCCO/VCCI separation. | Targeted at cost-sensitive, lower-speed industrial sensing-not RF or serial data applications. | Select for battery-powered systems requiring micropower operation and simplified single-supply design. |
Compared with ADCMP572BCPZ-R7 and TLV3501AIDBVR, LMH7324SQ/NOPB uniquely delivers quad-channel operation with independently configurable VCCI/VCCO rails, enabling simultaneous interface to multiple logic standards while maintaining sub-ns timing precision-making it optimal for compact, multi-threshold high-speed systems.
Availability
LMH7324SQ/NOPB is available at Aetrix Electronics and suitable for digital receiver front-ends, high-speed signal restoration circuits, and zero-crossing detection systems requiring stable component supply across extended temperature ranges and high-volume production cycles.
Supply support for LMH7324SQ/NOPB 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in high-speed signal chain components.
The LMH7324SQ/NOPB belongs to TI's high-speed comparator product line, designed specifically for applications demanding sub-nanosecond timing precision, multi-logic-family interoperability, and robust operation in industrial and communications infrastructure.
FAQ
What is the minimum overdrive voltage required for guaranteed 700 ps propagation delay in LMH7324SQ/NOPB?
The LMH7324SQ/NOPB achieves 700 ps typical propagation delay at 100 mV overdrive under 5V supply conditions (VCCI = VCCO = 5V, VEE = 0V). At 20 mV overdrive, delay increases to 740 ps. For designs requiring strict ≤700 ps timing, ≥50 mV overdrive is recommended per the 5V AC Electrical Characteristics table.
Can LMH7324SQ/NOPB operate with LVDS output levels, and what supply configuration is required?
Yes, LMH7324SQ/NOPB supports LVDS-compatible outputs when VCCO is set to 2.5V. The output swing remains 300–400 mV, meeting LVDS input thresholds (±100 mV), and the complementary Q/Q outputs provide inherent common-mode noise rejection. VCCI may remain at 5V to maintain full input dynamic range.
How many independent power domains does LMH7324SQ/NOPB support, and why is this architecture beneficial?
LMH7324SQ/NOPB supports two independent power domains: VCCI for the input stage and VCCO for the output stage. This separation allows the input to operate from 5V while outputs drive LVDS (2.5V VCCO) or PECL (5V VCCO) loads-enabling seamless interfacing between disparate logic families without external level shifters.
What is the function of the DAP (Pin 33) on LMH7324SQ/NOPB, and how must it be connected?
The DAP (Die Attach Pad) on LMH7324SQ/NOPB is an exposed thermal pad on the underside of the 32-pin WQFN package. It must be soldered to a large PCB copper pour tied to system ground to dissipate heat effectively. Thermal resistance drops from 36°C/W (no DAP connection) to ~25°C/W with proper DAP grounding-critical for sustained 12V operation.
Does LMH7324SQ/NOPB include internal hysteresis, and what is its typical value at 5V supply?
Yes, LMH7324SQ/NOPB features fixed internal hysteresis of 22.5 mV typical at 5V supply (VCCI = VCCO = 5V). This hysteresis improves noise immunity in noisy environments such as motor drives or switching power supplies, eliminating the need for external positive feedback networks.
LMH7324SQ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 32-WFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- Differential, LVDS, RSPECL
- Voltage - Supply, Single/Dual (±):
- 5V ~ 12V, ±2.5V ~ 6V
- :
- 9.5mV @ 5V
- Voltage - Input Offset (Max):
- 5µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 7.5mA
- Current - Quiescent (Max):
- 80dB CMRR, 75dB PSRR
- CMRR, PSRR (Typ):
- 0.74ns
- Propagation Delay (Max):
- 20.8mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 32-WQFN (5x5)
LMH7324SQ/NOPB FAQ
1.How can I place an order for LMH7324SQ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH7324SQ/NOPB 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 LMH7324SQ/NOPB reliable?
The price and inventory of LMH7324SQ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH7324SQ/NOPB is usually 5 days.
3.What payment methods are accepted for LMH7324SQ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH7324SQ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH7324SQ/NOPB?
LMH7324SQ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH7324SQ/NOPB 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 LMH7324SQ/NOPB?
For technical support, including LMH7324SQ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH7324SQ/NOPB requirements.
6.How does Aetrix verify that LMH7324SQ/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH7324SQ/NOPB 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 LMH7324SQ/NOPB meets industry standards.
7.What is the process for return or replacement of LMH7324SQ/NOPB?
All LMH7324SQ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH7324SQ/NOPB, 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 LMH7324SQ/NOPB part is unused and in its original packaging.
Return procedure for LMH7324SQ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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