Analog Devices Inc. ADCMP553BRM

Overview

ADCMP553BRM from Analog Devices is a single-supply, high-speed PECL/LVPECL comparator in an 8-lead MSOP package, delivering 500 ps propagation delay, 125 ps overdrive dispersion, and differential latch control. It operates from 3.3 V supply, supports −0.2 V to 1.3 V common-mode input range, and drives 50 Ω PECL loads directly-used in high-speed instrumentation front ends and logic analyzer trigger circuits.

For engineers reviewing the ADCMP553BRM datasheet, ADCMP553BRM pinout, ADCMP553BRM application, or ADCMP553BRM equivalent, key selection criteria include propagation delay stability under varying overdrive, latch timing margins (tS/tH = 100 ps), output rise/fall times (440/410 ps), hysteresis programmability (not applicable to ADCMP553), and MSOP thermal performance (θJA = 130°C/W).

Technical Context

The ADCMP553BRM implements a differential input stage with 750 MHz equivalent input bandwidth and >70 dB PSRR, enabling precise threshold detection in noisy, high-frequency signal paths. Its latch enable inputs feature internal pull-ups and support track-and-hold operation with 450 ps latch-to-output delay and 700 ps minimum pulse width.

Unlike the ADCMP552, the ADCMP553 lacks a dedicated hysteresis pin and contains only one comparator channel. Its outputs are fully compatible with both PECL and 3.3 V LVPECL logic families, sourcing/sinking sufficient current to drive 50 Ω terminations referenced to VCC − 2.0 V without external level-shifting circuitry.

Key Specifications

Pinout & Package

ADCMP553BRM is housed in an 8-lead MSOP (Mini Small Outline Package) with exposed pad for thermal enhancement. The package measures 3.0 mm × 3.0 mm × 0.85 mm (JEDEC MO-187 variant), optimized for high-density, high-speed PCB layouts requiring low parasitic inductance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADCMP553BRM, ADCMP572 offers faster raw delay but sacrifices latch capability and PECL drive; MAX999 provides broader supply flexibility and lower cost but trades 9× longer propagation delay-making ADCMP553BRM optimal for deterministic, latch-synchronized PECL timing paths.

Availability

ADCMP553BRM is available at Aetrix Electronics and suitable for automatic test equipment, high-speed oscilloscope front ends, and logic analyzer trigger circuits requiring stable component supply, guaranteed traceable sourcing, and long-term industrial temperature support.

Supply support for ADCMP553BRM 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, headquartered in Norwood, MA, with design and manufacturing expertise spanning precision, power, and high-speed domains.

The ADCMP55x family was developed specifically for ultra-high-speed timing-critical applications-including ATE, instrumentation, and communications infrastructure-where sub-nanosecond propagation delay stability and low overdrive dispersion are mandatory.

FAQ

What is the maximum operating frequency supported by the ADCMP553BRM?

The ADCMP553BRM supports a maximum toggle rate exceeding 800 MHz with >50% output swing, verified under typical conditions (VCC = 3.3 V, TA = 25°C). This capability stems from its 440 ps rise and 410 ps fall times, enabling reliable operation in high-speed clock recovery and data slicing applications where ADCMP553BRM maintains timing integrity across wide bandwidths.

Does the ADCMP553BRM include programmable hysteresis like the ADCMP552?

No, the ADCMP553BRM does not include a hysteresis control pin. Programmable hysteresis is exclusive to the ADCMP552 (via HYSA/HYSB pins). The ADCMP553BRM has fixed internal hysteresis of ±0.5 mV, as specified in Table 1 of the Rev. B datasheet. For designs requiring adjustable hysteresis, ADCMP553BRM users must implement external feedback networks or select ADCMP552 instead.

Can the ADCMP553BRM operate from a 5 V supply?

Yes, the ADCMP553BRM supports input supply voltages from 3.135 V to 5.25 V per Absolute Maximum Ratings (Table 2). At 5 V, it delivers higher output swing (VOH ≈ 3.85 V, VOL ≈ 1.85 V into 50 Ω to VCC − 2 V) and increased power dissipation (up to 75 mW with load). System designers must verify thermal margin using θJA = 130°C/W and ensure proper 5 V bypassing per layout guidelines in the ADCMP553BRM datasheet.

What is the purpose of the complementary LEA/LEA pins on the ADCMP553BRM?

The complementary LEA and LEA pins implement differential latch enable control: one is active-high and the other active-low, ensuring robust noise immunity and precise edge-triggered latching. When used together, they define compare (transparent) or latch (sample-and-hold) modes. Internal pull-ups set the default to tracking mode if left unconnected-enabling simplified implementation of ADCMP553BRM in systems where latching is optional.

How does the ADCMP553BRM handle input common-mode voltage outside the specified range?

The ADCMP553BRM specifies a safe input common-mode range of −0.2 V to VCC − 2.0 V. Operation beyond these limits risks parametric degradation or damage: voltages below −0.5 V or above +3.5 V violate Absolute Maximum Ratings and may cause irreversible ESD stress or input stage saturation. For signals exceeding this range, external clamping or level-shifting circuitry is required before applying them to ADCMP553BRM inputs.