Analog Devices Inc. ADCMP608BKSZ-REEL7

Overview

ADCMP608BKSZ-REEL7 from Analog Devices is a rail-to-rail, single-supply comparator with 40 ns propagation delay, 1 mW power dissipation at 2.5 V, −0.2 V to VCC + 0.2 V input common-mode range, and integrated shutdown pin. It operates from 2.5 V to 5.5 V and delivers TTL/CMOS-compatible output driving up to 15 pF-used in high-speed clock restoration and threshold detection circuits.

For engineers reviewing the ADCMP608BKSZ-REEL7 datasheet, ADCMP608BKSZ-REEL7 pinout, ADCMP608BKSZ-REEL7 application, or ADCMP608BKSZ-REEL7 equivalent, key selection criteria include propagation delay dispersion (<12 ns), shutdown wake-up time (150 ns), input offset voltage (±3 mV typ), rail-to-rail input capability, and SC70-6 package compatibility for space-constrained signal conditioning designs.

Technical Context

The ADCMP608BKSZ-REEL7 uses a dual-front-end input stage enabling rail-to-rail operation across −0.2 V to VCC + 0.2 V, with crossover bias points near 0.8 V and 1.6 V. Its gain stage provides 80 dB active gain and 45 dB CMRR over full supply and temperature range.

The TTL/CMOS-compatible output stage drives 15 pF loads with guaranteed timing, degrades linearly beyond that capacitance, and avoids phase reversal during input overdrive. Shutdown mode reduces supply current to 250–350 µA while placing the output in high-impedance state.

Key Specifications

Pinout & Package

ADCMP608BKSZ-REEL7 is housed in a 6-lead SC70 package (KS-6), measuring 2.20 mm × 1.35 mm × 0.90 mm, optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMH7220MK/NOPB and MAX961ASA+, the ADCMP608BKSZ-REEL7 uniquely balances 40 ns speed, rail-to-rail input, shutdown capability, and SC70-6 footprint-making it optimal for compact, low-power, wide-input-range comparator applications where timing predictability and supply flexibility are jointly critical.

Availability

ADCMP608BKSZ-REEL7 is available at Aetrix Electronics and suitable for high-speed clock restoration, sensor threshold detection, pulse-width modulation feedback, and LVDS-to-CMOS translation requiring stable component supply across automotive, industrial, and test equipment programs.

Supply support for ADCMP608BKSZ-REEL7 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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.

The ADCMP608 product line delivers high-speed comparators optimized for timing-critical signal conditioning-designed specifically for clock/data recovery, fast thresholding, and low-power event detection in space- and power-constrained systems.

FAQ

What is the maximum capacitive load the ADCMP608BKSZ-REEL7 can drive while maintaining its 40 ns propagation delay specification?

The ADCMP608BKSZ-REEL7 is specified for 40 ns propagation delay with a 15 pF capacitive load. Driving larger loads increases slew-limited delay-e.g., at 30 pF, delay increases by ~15–20 ns. For bus or transmission-line applications, a dedicated buffer is recommended to preserve timing integrity. The output stage degrades linearly beyond 15 pF, avoiding oscillation but sacrificing speed predictability.

Does the ADCMP608BKSZ-REEL7 support true rail-to-rail input operation down to −0.2 V relative to ground?

Yes-the ADCMP608BKSZ-REEL7 supports an input common-mode range from −0.2 V to VCC + 0.2 V across its full 2.5 V to 5.5 V supply range. This allows direct interface with AC-coupled signals, bipolar transducers, or DACs with negative headroom, without external clamping or biasing resistors. The dual-front-end architecture enables this extended range via internal crossover points near 0.8 V and 1.6 V.

How does the shutdown feature of the ADCMP608BKSZ-REEL7 affect output state and system timing?

When SDN is pulled low, the ADCMP608BKSZ-REEL7 enters shutdown mode, reducing supply current to 250–350 µA and placing the Q output in high-impedance state-not logic high or low. Wake-up time is 150 ns (output valid after SDN goes high), and shutdown entry takes 300 ns. This behavior supports burst-mode operation but requires external pull-up/down if a defined logic level is needed during shutdown.

Can the ADCMP608BKSZ-REEL7 be used with a single 2.5 V supply and still interface with 3.3 V or 5 V logic systems?

Yes-the ADCMP608BKSZ-REEL7's TTL/CMOS-compatible output delivers VOH ≥ VCC − 0.4 V and VOL ≤ 0.4 V at 0.8 mA load. At 2.5 V supply, VOH ≥ 2.1 V meets 3.3 V logic high thresholds; for 5 V systems, a level shifter or resistor divider may be needed on the output. Input common-mode range remains −0.2 V to 2.7 V, safely covering 0–2.5 V sensor signals.

What layout practices are essential to achieve the specified 40 ns propagation delay and low dispersion in the ADCMP608BKSZ-REEL7?

To achieve the ADCMP608BKSZ-REEL7's specified 40 ns delay and <12 ns overdrive dispersion, place a 0.1 µF ceramic bypass capacitor directly adjacent to the VCC pin with low-inductance vias to ground. Keep input traces short and symmetric, minimize source impedance, avoid shared return paths, and isolate analog inputs from noisy digital routing. Poor bypassing or long input traces increase delay dispersion and risk oscillation due to parasitic feedback.