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Texas Instruments LMH7324SQX/NOPB
- Part No.:
- LMH7324SQX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LMH7324SQX/NOPB.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 32WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,602
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Product details
Overview
LMH7324SQX/NOPB from Texas Instruments is a quad high-speed comparator with RS(P)ECL outputs, 700 ps propagation delay (5V supply), 20 ps overdrive dispersion, and input common-mode range extending 200 mV below VEE - enabling ground-sensing on single 5V supply. It operates across −40°C to +125°C and targets high-speed signal restoration in digital receivers and sampling systems.
For engineers reviewing the LMH7324SQX/NOPB datasheet, LMH7324SQX/NOPB pinout, LMH7324SQX/NOPB application, or LMH7324SQX/NOPB equivalent, key selection criteria include propagation delay stability across overdrive voltage (±20 mV to ±1 V), Q/Q skew ≤60 ps, RS(P)ECL/LVDS output configurability via independent VCCI/VCCO rails, and 32-pin WQFN thermal performance (36°C/W).
Technical Context
The LMH7324SQX/NOPB integrates four independent comparators, each with differential RS(P)ECL output stages referenced to dedicated VCCO pins and input stages powered by isolated VCCI rails. Its architecture supports dual-supply operation (VCCI = 5–12V, VCCO = 2.5–12V, VEE = 0V) and allows LVDS-level outputs when VCCO = 2.5V.
Input topology includes ESD diodes and clamps between VCCI/VEE and VCCO/VEE, with input bias current ≤−2.2 µA (5V) and hysteresis fixed at 22.5 mV. Output rise/fall times are 145 ps (20%–80%, 5V), and toggle rate reaches 3.72 Gb/s with 2 pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 700 ps typical at 5V supply, 20 mV overdrive - enables sub-nanosecond timing-critical decision circuits. |
| Overdrive Dispersion | 18 ps max (20 mV ↔ 100 mV) - ensures consistent timing across input signal amplitudes in jitter-sensitive links. |
| Supply Range | VCCI/VCCO = 5V to 12V, VEE = 0V - supports interoperability with PECL, LVDS, and TTL logic families via rail selection. |
| Input Common-Mode Range | Extends 200 mV below VEE - permits direct ground-referenced analog input without level-shifting on single 5V supply. |
| Output Configuration | RS(P)ECL-compatible complementary outputs; configurable as LVDS with VCCO = 2.5V and 50Ω termination to VCCO−2V. |
| Operating Temperature | −40°C to +125°C - qualified for industrial and automotive under-hood signal conditioning applications. |
| Package Thermal Resistance | 36°C/W (θJA, 32-pin WQFN) - supports sustained 17 mA/channel output stage current without derating at 85°C ambient. |
Pinout & Package
LMH7324SQX/NOPB uses a 32-pin WQFN (5 mm × 5 mm, 0.5 mm pitch) with exposed thermal pad (DAP). Power and signal pins are partitioned per comparator quadrant (A–D), with dedicated VCCI, VCCO, and VEE pins per section to minimize crosstalk and enable independent logic-level translation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 17, 24 | VCCO (A–D) | Independent positive supply for output stage - sets RS(P)ECL/LVDS output swing; decoupling required per pin. |
| 2–3, 6–7, 18–19, 22–23 | Q / Q (A–D) | Differential RS(P)ECL outputs - referenced to respective VCCO rail; support 50Ω transmission line drive. |
| 4–5, 12–13, 20–21, 28–29 | VEE (A–D) | Negative supply (0V typical); internally connected via antiparallel diodes - requires low-inductance grounding. |
| 9, 16, 25, 32 | VCCI (A–D) | Independent positive supply for input stage - isolates input bias from output noise; supports wide common-mode range. |
| 10–11, 14–15, 26–27, 30–31 | IN− / IN+ (A–D) | Differential analog inputs - accept signals down to VEE −200 mV; internal hysteresis improves noise immunity. |
| 33 | DAP | Exposed thermal pad - must be soldered to PCB ground plane for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-channel integration | Four fully independent comparators in one 5 mm × 5 mm WQFN - reduces board area vs. discrete solutions in multi-channel sampling systems. |
| Supply rail independence | VCCI and VCCO pins separated per channel - enables simultaneous interfacing to mixed-voltage logic (e.g., 5V FPGA core + 2.5V SERDES I/O). |
| Low dispersion timing | ≤20 ps overdrive dispersion and ≤60 ps Q/Q skew - preserves pulse integrity in high-speed trigger and window detection applications. |
| Single-supply ground sensing | Input common-mode extends 200 mV below VEE - eliminates need for negative supply or level shifters in DC-coupled sensor interfaces. |
| Configurable output standards | RS(P)ECL outputs become LVDS-compliant with VCCO = 2.5V and proper 50Ω termination - simplifies migration between logic families. |
Applications
| Digital Receiver Front-End | High-Speed Sampling System |
|---|---|
Use Scenario: Recovering data from degraded high-frequency serial streams in optical or RF receivers. IC Role / Device Role / Timing Role: Threshold decision element converting analog eye-diagram signals into clean digital data streams. Use Value: 700 ps propagation delay and 3.72 Gb/s toggle rate ensure accurate bit recovery at multi-Gbps rates without added latency. |
Use Scenario: Latching analog samples in time-interleaved ADCs or real-time oscilloscopes. IC Role / Device Role / Timing Role: Precision zero-crossing detector generating synchronous strobe pulses aligned to input waveform transitions. Use Value: 20 ps overdrive dispersion minimizes aperture jitter, directly improving effective resolution in sampling systems. |
| Window Comparator | High-Speed Signal Triggering |
Use Scenario: Validating sensor output voltage stays within safety or specification limits (e.g., battery cell monitoring). IC Role / Device Role / Timing Role: Dual-threshold comparator detecting out-of-range conditions with hysteresis-enabled noise rejection. Use Value: Fixed 22.5 mV internal hysteresis prevents chatter near trip points while maintaining nanosecond response to valid excursions. |
Use Scenario: Generating precise trigger events for logic analyzers or test equipment capturing transient signal anomalies. IC Role / Device Role / Timing Role: Fast edge detector initiating capture clocks with minimal delay variation across input slew rates. Use Value: 40 ps slew-rate dispersion ensures consistent trigger timing regardless of input edge steepness (0.1–1 V/ns). |
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, CML outputs, no VCCI/VCCO separation - requires external level shifting for LVDS. | Better suited for ultra-low-latency single-event triggering; lacks quad integration and rail-flexible output configuration. | Select when absolute minimum delay (<250 ps) outweighs channel count and output flexibility requirements. |
| TLV3501AIDBVR | Single-channel, 4.5 ns propagation delay, CMOS outputs, 2.7–5.5V supply - no RS(P)ECL/LVDS compatibility. | Targeted at cost-sensitive, lower-speed industrial control; cannot interface directly to high-speed serial I/O standards. | Select only for non-critical timing applications where power efficiency and cost dominate over speed and standard compliance. |
Compared with ADCMP572BCPZ-R7 and TLV3501AIDBVR, the LMH7324SQX/NOPB uniquely delivers quad-channel, rail-flexible RS(P)ECL/LVDS outputs with sub-nanosecond delay and industrial temperature range - making it the only option for space-constrained, multi-standard high-speed decision circuits.
Availability
LMH7324SQX/NOPB is available at Aetrix Electronics and suitable for digital receiver front-ends, high-speed sampling systems, and industrial window comparator designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMH7324SQX/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, embedded processing, and connectivity technologies, with decades of high-speed signal chain innovation.
The LMH7324SQX/NOPB belongs to TI's high-speed comparator product line, engineered specifically for nanosecond-precision decision-making in digital communications, test equipment, and real-time signal acquisition systems.
FAQ
What is the maximum operating supply voltage for LMH7324SQX/NOPB?
The LMH7324SQX/NOPB supports VCCI and VCCO supply voltages from 5V to 12V, with absolute maximum rating of 13.2V (VCCx – VEE). Operation above 12V is not specified and may risk parametric degradation or reliability failure. At 12V, propagation delay increases to 737 ps (20 mV overdrive), and supply currents rise to 8 mA (VCCI) and 17 mA (VCCO) per channel.
Can LMH7324SQX/NOPB generate true LVDS outputs?
Yes, the LMH7324SQX/NOPB can generate LVDS-compatible outputs by setting VCCO = 2.5V and terminating each Q/Q pair to VCCO − 2V (0.5V) through 50Ω resistors. This yields a differential swing of 300–400 mV centered at 1.3V, meeting ANSI TIA/EIA-644-A LVDS specifications. The independent VCCI/VCCO architecture enables this without modifying input-stage biasing.
How is thermal management handled in the LMH7324SQX/NOPB package?
The LMH7324SQX/NOPB uses a 32-pin WQFN with an exposed thermal pad (DAP, Pin 33) that must be soldered to a PCB copper pour connected to system ground. With θJA = 36°C/W, the device dissipates up to 540 mW total (135 mW/channel at 17 mA VCCO current) before exceeding 125°C junction temperature at 85°C ambient - requiring ≥2 cm² of 2-oz copper for reliable operation.
Does LMH7324SQX/NOPB require external hysteresis?
No, the LMH7324SQX/NOPB includes fixed internal hysteresis of 22.5 mV (5V) or 20.8 mV (12V), designed to suppress noise-induced false triggering without external components. This value is trimmed during production and remains stable across temperature (±1 mV from −40°C to +125°C), eliminating design overhead for stability-critical applications like zero-crossing detection.
What is the input voltage range limitation relative to VEE and VCCI for LMH7324SQX/NOPB?
The LMH7324SQX/NOPB input common-mode range extends from VEE − 0.2 V to VCCI − 2 V. For example, with VEE = 0V and VCCI = 5V, inputs may swing from −200 mV to +3 V. Differential input voltage is limited to ±5 V (5V supply) or ±12 V (12V supply), beyond which internal clamps conduct - requiring external limiting if overvoltage transients exceed these bounds.
LMH7324SQX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 32-WFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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)
LMH7324SQX/NOPB FAQ
1.How can I place an order for LMH7324SQX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH7324SQX/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 LMH7324SQX/NOPB reliable?
The price and inventory of LMH7324SQX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH7324SQX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH7324SQX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH7324SQX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH7324SQX/NOPB?
LMH7324SQX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH7324SQX/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 LMH7324SQX/NOPB?
For technical support, including LMH7324SQX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH7324SQX/NOPB requirements.
6.How does Aetrix verify that LMH7324SQX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH7324SQX/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 LMH7324SQX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH7324SQX/NOPB?
All LMH7324SQX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH7324SQX/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 LMH7324SQX/NOPB part is unused and in its original packaging.
Return procedure for LMH7324SQX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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