Analog Devices Inc. LT1711IMS8#TRPBF

Overview

LT1711IMS8#TRPBF from Analog Devices (formerly Linear Technology) is a single ultrafast rail-to-rail input/output comparator with internal TTL/CMOS-compatible latch, optimized for 2.4V–12V single or ±2.4V–±6V dual supplies. It delivers 4.5ns propagation delay at 20mV overdrive, rail-to-rail input common-mode range extending 100mV beyond both rails, and complementary outputs capable of sinking 10mA to within 0.5V of GND or sourcing 10mA to within 0.7V of V+. It is widely used in high-speed sampling circuits, crystal oscillator timing loops, and pulse width modulators.

For engineers reviewing the LT1711IMS8#TRPBF datasheet, LT1711IMS8#TRPBF pinout, LT1711IMS8#TRPBF application, or LT1711IMS8#TRPBF equivalent, key selection criteria include propagation delay vs. overdrive, latch timing parameters (tSU = 1ns, tLPD = 5ns), rail-to-rail input tolerance beyond supply rails, output drive capability under 10mA load, and guaranteed operation across –40°C to +85°C industrial temperature range.

Technical Context

The LT1711IMS8#TRPBF employs a high-gain, low-offset differential input stage with matched NPN/PNP pairs enabling rail-to-rail common-mode operation down to –0.1V and up to V+ + 0.1V. Its complementary push-pull output stage directly interfaces to TTL/CMOS logic without level-shifting components.

Internal latch functionality is edge-agnostic and held active while LATCH ENABLE (Pin 5) remains high; built-in 100mV hysteresis prevents false triggering from slow or noisy control signals. Propagation delay is specified with 10pF load and tested at 2.7V, 5V, and ±5V supplies - with differential delay ∆tPD ≤ 1.5ns ensuring precise timing matching between rising/falling edges.

Key Specifications

Pinout & Package

LT1711IMS8#TRPBF is housed in an 8-lead MSOP (Mini Small Outline Package) with 0.65mm lead pitch, 3.0mm × 3.0mm body, and exposed pad for thermal enhancement. Pin 1 is V+, Pin 2 is +IN, Pin 3 is –IN, Pin 4 is V–, Pin 5 is LATCH ENABLE, Pin 6 is GND, Pin 7 is Q (noninverting output), and Pin 8 is Q̅ (inverting output).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT1711IMS8#TRPBF, LT1719IS6#TRMPBF simplifies supply design in single-rail systems but removes latch functionality and dual-supply operation, while LMH7322MA/NOPB offers dual-channel density at the cost of higher power and no integrated latch - making LT1711IMS8#TRPBF uniquely balanced for latch-critical, supply-flexible industrial timing applications.

Availability

LT1711IMS8#TRPBF is available at Aetrix Electronics and suitable for high-speed sampling circuits, crystal oscillator timing loops, and current-sense protection systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LT1711IMS8#TRPBF 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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The LT1711IMS8#TRPBF belongs to Linear's UltraFast™ comparator family, designed specifically for applications demanding sub-5ns decision latency, rail-to-rail signal handling, and robust latch-controlled data retention in automated test equipment and precision timing systems.

FAQ

What is the maximum operating temperature range for the LT1711IMS8#TRPBF?

The LT1711IMS8#TRPBF is specified and guaranteed over the industrial temperature range of –40°C to +85°C. Its absolute maximum junction temperature is 150°C, and thermal resistance θJA is 250°C/W in the MS8 package. Derating is required above 70°C ambient when operating at full supply current and switching frequency; layout with proper copper pour and thermal vias improves sustained performance.

Does the LT1711IMS8#TRPBF require external hysteresis for stable operation?

The LT1711IMS8#TRPBF does not require external hysteresis for basic comparator operation, as its internal architecture provides inherent stability. However, external positive feedback is recommended in noisy environments or for threshold-level discrimination to prevent multiple toggling. The rail-to-rail inputs and complementary outputs allow flexible hysteresis configuration - e.g., connecting Q or Q̅ back to –IN or +IN via resistor networks - without common-mode constraints.

Can the LT1711IMS8#TRPBF operate from a single 3.3V supply?

Yes, the LT1711IMS8#TRPBF operates from a single 3.3V supply, as its minimum single-supply voltage is 2.4V and maximum is 12V. At 3.3V, it maintains 4.5ns typical propagation delay (with slight increase at lower overdrive), rail-to-rail input range (–0.1V to 3.4V), and output swing (VOH ≥ 2.8V, VOL ≤ 0.4V at 1mA). Performance is fully characterized at 2.7V, 5V, and ±5V, and validated by design correlation at 3.3V.

What is the purpose of the LATCH ENABLE pin on the LT1711IMS8#TRPBF?

The LATCH ENABLE pin (Pin 5) on the LT1711IMS8#TRPBF controls an internal transparent latch that holds the comparator's output state. When driven high, the latch captures and retains the current Q/Q̅ logic levels; when low, the outputs follow input transitions in real time. With 1ns setup time and 100mV hysteresis, it enables reliable synchronization to external clocks in high-speed trigger systems - a feature absent in most competing comparators like the LMH7322 or LT1719.

How does the LT1711IMS8#TRPBF handle input voltages exceeding the supply rails?

The LT1711IMS8#TRPBF guarantees correct operation with input voltages extending 100mV beyond both supply rails (i.e., down to V– – 0.1V and up to V+ + 0.1V), and protects against phase reversal under such conditions. Internal Schottky clamp diodes prevent substrate conduction during overdrive, enabling safe use in applications like overvoltage detection in power supplies or current-sense amplifiers where transients exceed rail limits - a key reliability advantage over non-rail-to-rail comparators.