Texas Instruments LMH7220MK

Overview

LMH7220MK from Texas Instruments is a high-speed, low-power comparator with LVDS differential output, operating from 2.7V to 12V supply, delivering 2.9 ns propagation delay, 0.6 ns rise/fall times, and 325 mV differential swing into 100Ω load-used in oscilloscope triggering and fast line reception.

For engineers reviewing the LMH7220MK datasheet, LMH7220MK pinout, LMH7220MK application, or LMH7220MK equivalent, this page provides verified technical context, real-world timing performance across supply voltages, LVDS interface behavior, thermal stability data, and validated alternative comparators for high-speed acquisition systems.

Technical Context

The LMH7220MK implements a current-mode LVDS output stage with internal CM feedback loop maintaining 1.2 V common-mode voltage independent of supply; its input stage supports common-mode range down to −0.2 V (200 mV below GND) enabling ground-sensing single-supply operation.

Propagation delay dispersion remains ≤0.86 ns over 20–100 mV overdrive, and skew between Q/Q outputs is ≤0.09 ns at 100 mV overdrive-critical for time-critical pulse discrimination in acquisition trigger paths.

Key Specifications

Pinout & Package

LMH7220MK is housed in a 6-pin SOT-23 package (JEDEC MO-178AA), surface-mountable with 0.95 mm pitch, optimized for space-constrained PCB layouts in test equipment and sensor interfaces.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed comparator applications.

Compared with LMH7220MK, TLV3501DBVR lacks native LVDS drive capability and adds system-level translation overhead, while ADCMP572BCPZ-R7 achieves faster delay but mandates negative supply and introduces PECL-to-LVDS interface challenges-LMH7220MK uniquely balances speed, LVDS compliance, and single-supply simplicity.

Availability

LMH7220MK is available at Aetrix Electronics and suitable for oscilloscope triggering, pulse height analysis, and fast differential line reception requiring stable component supply across industrial temperature ranges and long-lifecycle production programs.

Supply support for LMH7220MK 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 conditioning and precision timing solutions.

The LMH7220MK belongs to TI's high-speed comparator product line, engineered specifically for applications demanding sub-3 ns latency, LVDS compatibility, and robust operation from −40°C to +125°C in test & measurement and sensor interface systems.

FAQ

What is the guaranteed propagation delay range for LMH7220MK across temperature and supply voltage?

The LMH7220MK guarantees propagation delay ≤3.8 ns over −40°C to +125°C and 2.7V–12V supply, with typical values of 2.9 ns at 5V/25°C and 3.0 ns at 2.7V/125°C per TI SNOSAL3E datasheet Section 6.5. This ensures predictable timing in temperature-varying acquisition systems without recalibration.

Does LMH7220MK require external termination resistors, and where should they be placed?

Yes, LMH7220MK requires a 100Ω differential termination resistor placed as close as possible to the receiver end of the transmission line-not at the LMH7220MK output pins-to maintain signal integrity and minimize reflections. The device drives the line differentially with 3.25 mA current sources, relying on that external resistor to generate the 325 mV LVDS swing.

Can LMH7220MK operate with a 2.7V single supply while detecting signals at ground potential?

Yes, LMH7220MK supports input common-mode voltages down to −0.2 V (200 mV below GND), enabling direct comparison of 0 V referenced signals-such as TTL or CMOS logic edges-without level-shifting circuitry when powered from a 2.7 V single supply.

How does LMH7220MK maintain LVDS common-mode voltage stability across supply variations?

LMH7220MK uses an internal CM feedback loop tied to a 1.2 V reference (VREF) and equal resistors connecting OUT Q and OUT Q. This architecture holds common-mode voltage at ~1.2 V regardless of VCC changes from 2.7 V to 12 V, ensuring interoperability with standard LVDS receivers across diverse supply domains.

Is LMH7220MK pin-compatible with other comparators in the LMH72xx family?

Yes, LMH7220MK shares identical 6-pin SOT-23 pinout and footprint with LMH7221MK (dual version) and LMH7222MK (quad version), enabling scalable channel count designs without PCB layout changes-though electrical specs (e.g., propagation delay, supply current) differ per variant.