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Texas Instruments LMH7220MKX
- Part No.:
- LMH7220MKX
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMH7220MKX.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,583
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Product details
Overview
LMH7220MKX from Texas Instruments is a high-speed, low-power comparator with LVDS differential output, operating from 2.7V to 12V supply. It delivers 2.9 ns propagation delay, 0.6 ns rise/fall times, and 325 mV differential output swing into 100Ω, enabling >940 Mb/s toggle rate at 5V. It supports ground-sensing applications via input voltage range extending 200 mV below ground and is used in oscilloscope triggering and fast line reception.
For engineers reviewing the LMH7220MKX datasheet, LMH7220MKX pinout, LMH7220MKX application, or LMH7220MKX equivalent, this page provides verified technical context, real-world timing behavior across supply voltages (2.7V/5V/12V), LVDS termination requirements, temperature-stable offset performance (−40°C to +125°C), and validated alternative comparators for high-speed differential signaling designs.
Technical Context
The LMH7220MKX employs a current-mode LVDS output stage with internal 3.25 mA switched current sources and CM feedback loop maintaining 1.2 V common-mode output voltage independent of supply. Its input stage features ESD-protected differential pair with 1.5 kΩ series resistors and base-clamp diodes, supporting rail-to-rail common-mode input down to −0.2 V.
Propagation delay dispersion is characterized across overdrive (20–1000 mV), slew rate (0.05–1 V/ns), and common-mode voltage (0–10 V), with skew between Q and Q outputs limited to ≤0.09 ns at 100 mV overdrive. Input offset voltage drift is ±50 μV/°C, and supply current remains stable at 6.8 mA (typ, 5V) across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 2.9 ns @ 100 mV overdrive, 5V supply - enables sub-3 ns decision latency in time-critical acquisition paths |
| Rise/Fall Time | 0.6 ns (20–80%) - supports clean 100+ ps edge integrity for >1 GHz signal transitions |
| LVDS Output Swing | 320 mV differential (typ) into 100 Ω - meets ANSI/TIA/EIA-644 LVDS standard for noise-immune interconnect |
| Supply Voltage Range | 2.7 V to 12 V - allows single-supply operation in 3.3 V, 5 V, and 12 V systems without level-shifting |
| Input Common-Mode Range | −0.2 V to VCC−2 V - permits direct ground-referenced sensing in single-supply configurations |
| Operating Temperature | −40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| Supply Current | 6.8 mA (typ, 5V, load excluded) - enables low-power high-speed comparison without thermal derating |
Pinout & Package
LMH7220MKX is packaged in a 6-pin SOT-23 (DBV) surface-mount package with 0.95 mm pitch, optimized for high-density PCB layouts and minimal parasitic inductance in high-frequency paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN−) | Inverting input | Differential input node; accepts signals down to −0.2 V relative to GND |
| 2 (GND) | Ground reference | Return path for input stage and LVDS output common-mode regulation |
| 3 (IN+) | Non-inverting input | Differential input node; supports same extended common-mode range as IN− |
| 4 (VCC) | Positive supply | Single- or dual-supply rail (2.7–12 V); powers internal bias and output current sources |
| 5 (OUT Q) | LVDS true output | Current-source-driven output; requires 100 Ω differential termination to GND |
| 6 (OUT Q̄) | LVDS complement output | Complementary current-source-driven output; forms differential pair with OUT Q |
Key Features
| Feature | Design Value |
|---|---|
| LVDS-compliant output stage | Internally regulated 3.25 mA current sources with CM feedback maintain 1.2 V common-mode and 325 mV swing into 100 Ω |
| Extended input voltage range | Operates with inputs as low as −0.2 V (below GND), enabling direct detection of signals referenced to earth or chassis ground |
| Low propagation delay dispersion | ≤0.86 ns overdrive dispersion (20–100 mV) ensures consistent timing across varying signal amplitudes |
| High-speed toggle capability | 940 Mb/s max toggle rate at 5V enables use in pulse-width modulation and digital sampling clock recovery |
| Robust ESD protection | 2.5 kV HBM rating per I/O pin; input clamping diodes and power clamp prevent latch-up during handling or transient events |
Applications
| Acquisition Trigger | Fast Differential Line Receiver |
|---|---|
Use Scenario: Precise edge detection in high-speed data acquisition systems sampling at >100 MSPS. IC Role / Device Role / Timing Role: Comparator generating synchronous trigger pulses with sub-3 ns jitter-sensitive latency. Use Value: Enables deterministic sampling window alignment with <10 ps skew between channels using matched LMH7220MKX units. |
Use Scenario: Receiving high-speed differential signals over backplanes or cables in test equipment. IC Role / Device Role / Timing Role: LVDS line receiver converting differential logic to clean single-ended logic for FPGA capture. Use Value: Delivers 940 Mb/s toggle rate and <5 ps RMS jitter, preserving signal integrity without external equalization. |
| Pulse Height Analyzer | Oscilloscope Triggering |
Use Scenario: Discriminating analog pulse amplitudes in nuclear instrumentation or laser ranging. IC Role / Device Role / Timing Role: High-speed threshold comparator with stable offset (<±9.5 mV) across temperature. Use Value: Maintains consistent amplitude discrimination accuracy from −40°C to +125°C with <50 μV/°C VOS drift. |
Use Scenario: Generating low-jitter, fast-rise trigger signals for real-time oscilloscope front-ends. IC Role / Device Role / Timing Role: Primary trigger comparator with <0.09 ns Q/Q skew ensuring precise horizontal timebase synchronization. Use Value: Reduces trigger jitter-induced waveform distortion by >40% versus non-LVDS comparators at 100 MHz input rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed LVDS comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH7220MA/NOPB | Same die, 8-pin SOIC package - larger footprint, higher parasitic capacitance (~2.5 pF vs. 0.8 pF) | Preferred for prototyping or low-frequency validation where layout density is not constrained | Select when board space allows and solder rework tolerance is prioritized over RF performance |
| ADCMP572BCPZ-R2 | 3.3 V only, 2.3 ns propagation delay, CML output (not LVDS), 1.6 mA supply current | Better suited for ultra-low-power, fixed-voltage 3.3 V systems requiring <2.5 ns latency | Choose only if supply is strictly 3.3 V and CML interface compatibility with downstream logic is confirmed |
Compared with LMH7220MKX, LMH7220MA/NOPB offers identical electrical performance but sacrifices high-frequency layout integrity due to SOIC parasitics, while ADCMP572BCPZ-R2 trades LVDS interoperability and wide supply range for lower latency and power at the cost of voltage and interface inflexibility.
Availability
LMH7220MKX is available at Aetrix Electronics and suitable for oscilloscope triggering, pulse height analysis, and fast differential line reception requiring stable component supply across automotive, industrial, and test equipment programs.
Supply support for LMH7220MKX 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 delivering analog, embedded processing, and connectivity solutions with focus on reliability, precision, and energy efficiency.
The LMH7220MKX belongs to TI's high-speed comparator product line, engineered specifically for applications demanding sub-3 ns latency, LVDS-compatible outputs, and robust operation across extended industrial temperature ranges.
FAQ
What is the minimum supply voltage required for reliable operation of the LMH7220MKX?
The LMH7220MKX operates reliably from 2.7 V to 12 V. At 2.7 V, it maintains 3.0 ns propagation delay (typ), 0.64 ns rise time, and 315 mV differential output swing into 100 Ω - all within specification. Below 2.7 V, performance degrades rapidly and is not guaranteed; therefore, 2.7 V is the absolute minimum functional supply voltage for LMH7220MKX.
Does the LMH7220MKX require external termination resistors, and if so, what value and placement is recommended?
Yes, the LMH7220MKX requires a 100 Ω differential termination resistor placed as close as possible to the receiver end of the transmission line - not at the LMH7220MKX output pins. This matches the LVDS standard and ensures proper 325 mV swing and common-mode stability. Placing the resistor at the source causes reflections and violates LVDS signaling integrity requirements for LMH7220MKX.
Can the LMH7220MKX inputs safely handle signals below ground potential?
Yes. The LMH7220MKX input voltage range extends to −0.2 V relative to GND (per DC specs at VCC = 2.7–12 V), enabling true ground-sensing functionality. This allows direct connection of sensors referenced to earth or chassis ground without level-shifting circuitry - a key design enabler confirmed in the LMH7220MKX datasheet Section "Input Voltage Range".
What is the maximum toggle rate supported by the LMH7220MKX at 5V supply?
At 5 V supply and 25°C, the LMH7220MKX achieves a maximum toggle rate of 940 Mb/s (typ) with ±50 mV overdrive and 2 pF load. This is measured under standardized conditions defined in the LMH7220MKX datasheet AC Electrical Characteristics table and reflects its capability as a high-speed decision element in serial data paths.
How does temperature affect the propagation delay of the LMH7220MKX?
Propagation delay of the LMH7220MKX increases slightly with temperature: from 2.9 ns (typ) at 25°C to 3.29 ns (typ) at 125°C under 100 mV overdrive and 5 V supply. This 0.39 ns variation over full temperature range is documented in Figure 14 of the LMH7220MKX datasheet and remains within system timing budgets for most high-speed trigger applications.
LMH7220MKX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Complementary, Differential, LVDS
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 12V, ±1.35V ~ 6V
- :
- 9.5mV @ 5V
- Voltage - Input Offset (Max):
- 0.5µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 6.8mA
- Current - Quiescent (Max):
- 70dB CMRR, 74dB PSRR
- CMRR, PSRR (Typ):
- 7ns
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-THIN
LMH7220MKX FAQ
1.How can I place an order for LMH7220MKX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH7220MKX 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 LMH7220MKX reliable?
The price and inventory of LMH7220MKX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH7220MKX is usually 5 days.
3.What payment methods are accepted for LMH7220MKX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH7220MKX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH7220MKX?
LMH7220MKX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH7220MKX 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 LMH7220MKX?
For technical support, including LMH7220MKX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH7220MKX requirements.
6.How does Aetrix verify that LMH7220MKX is sourced from the original manufacturer or authorized distributors?
All LMH7220MKX 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 LMH7220MKX meets industry standards.
7.What is the process for return or replacement of LMH7220MKX?
All LMH7220MKX units undergo pre-shipment inspection (PSI). If there is an issue with LMH7220MKX, 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 LMH7220MKX part is unused and in its original packaging.
Return procedure for LMH7220MKX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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