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Home > Products > Integrated Circuits (ICs) > Linear > Comparators

Analog Devices Inc. AD8611ARMZ-REEL

Name: AD8611ARMZ-REEL
Brand: Analog Devices Inc.
SKU: AD8611ARMZ-REEL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD8611ARMZ-REEL

Manufacturer:: Analog Devices Inc.

Category:: Comparators

Package:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Datasheet:: AD8611ARMZ-REEL.pdf

Description:: IC COMPARATOR 1 W/LATCH 8MSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AD8611ARMZ-REEL from Analog Devices is a single-channel, ultrafast 4 ns propagation delay comparator with latch function and complementary outputs, operating from 3 V to 5 V single supply. It features 100 MHz input frequency capability, matched rising/falling propagation delays (Δt_P ≤ 2.0 ns), and rail-to-rail input common-mode range down to GND - ideal for clock recovery, high-speed line receivers, and ADC timing in embedded digital systems.

For engineers reviewing the AD8611ARMZ-REEL datasheet, AD8611ARMZ-REEL pinout, AD8611ARMZ-REEL application, or AD8611ARMZ-REEL equivalent, key selection considerations include latch enable threshold (VIH = 2.0 V min at VCC > 4.3 V), output drive capability (3.2 mA sink/source), input bias current (−7 μA max over temp), and MSOP-8 package thermal resistance (θ_JA = 240°C/W).

Technical Context

The AD8611ARMZ-REEL employs a bipolar PNP differential input stage enabling −200 mV to +3.0 V input common-mode range on 5 V supply. Its latch circuit is TTL/CMOS-compatible but nonfunctional below 4.3 V supply, requiring strict VCC regulation for reliable data hold.

Propagation delay matching (rising vs. falling ≤ 2.0 ns) and low input capacitance (3.0 pF) support duty-cycle–preserving clock regeneration. Output stages deliver complementary QA/QA signals with VOH ≥ 2.4 V (IOH = 3.2 mA) and VOL ≤ 0.4 V (IOL = 3.2 mA) at 5 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Propagation Delay	4.0 ns typical (200 mV step, 100 mV overdrive, 5 V supply) - enables sub-250 MHz timing resolution.
Input Frequency	100 MHz max (400 mV p-p sine wave) - supports high-speed serial clock and data recovery.
Supply Range	3.0 V to 5.0 V single supply - compatible with modern low-voltage logic domains without level shifters.
Input Common-Mode Range	0.0 V to 3.0 V at 5 V supply - includes ground reference, simplifying zero-crossing and single-supply sensor interface.
Latch Enable Threshold	VIH = 2.0 V min, VIL = 0.8 V max (VCC > 4.3 V) - ensures robust interfacing with 3.3 V/5 V logic families.
Output Drive	3.2 mA sink/source (VOL ≤ 0.4 V, VOH ≥ 2.4 V) - directly drives 40 TTL loads or 400 Ω resistive termination.
Input Bias Current	−7 μA max (−40°C to +85°C) - requires ≤1 kΩ source impedance to limit voltage error to <7 mV.

Pinout & Package

AD8611ARMZ-REEL is housed in an 8-lead MSOP (RM-8) surface-mount package with exposed pad (thermal performance θ_JA = 240°C/W, θ_JC = 43°C/W). Pin 1 is marked by beveled corner; pin count and layout match SOIC-8 but with 0.5 mm pitch and reduced footprint.

Pin/Terminal	Circuit Role	Design Meaning
1	V+	Positive supply terminal - must be bypassed with 1 μF + 10 nF capacitors within 0.5 inch for stable high-speed operation.
2	IN+	Noninverting analog input - bipolar PNP stage allows common-mode down to GND; input bias current flows out.
3	IN−	Inverting analog input - matched with IN+ for precise threshold comparison; same bias current behavior.
4	V−	Negative supply terminal - tied to GND in single-supply configurations; sets lower bound of input common-mode range.
5	LATCH	Latch enable control - active-high TTL/CMOS input; latching disabled if V+ < 4.3 V.
6	GND	Negative logic supply reference - requires continuous ground plane to minimize ground bounce in high-speed switching.
7	QA	Complementary output A - true output; drives high/low with matched rise/fall times (2.5 ns / 1.1 ns).
8	QA	Complementary output A - inverted output; provides differential signaling capability without external inverters.

Key Features

Feature	Design Value
4 ns propagation delay	Enables timing-critical applications like clock distribution where jitter accumulation must be minimized.
Matched rising/falling delay (Δt_P ≤ 2.0 ns)	Maintains input duty cycle at output - critical for clock recovery circuits preserving signal integrity.
Latch function with 0.5 ns setup/hold	Allows precise edge-triggered sampling without external flip-flops; eliminates metastability risk in synchronous systems.
Rail-to-rail input common-mode (to GND)	Supports direct interface with sensors, DACs, and baseband signals without level-shifting circuitry.
Stable with capacitive loads ≤30 pF	Permits direct connection to PCB traces and IC inputs without added series resistance or compensation networks.

Applications

High-Speed Clock Recovery	Line Receiver for Digital Communications
Use Scenario: Recovering clean square-wave clocks from distorted, attenuated, or noisy high-frequency transmission lines (e.g., backplanes, cables, PCB traces). IC Role / Device Role / Timing Role: Comparator acting as threshold detector with matched propagation paths to preserve duty cycle and minimize jitter. Use Value: 4 ns delay and ≤2.0 ns delay mismatch ensure recovered clock edges align within ±1 ns of ideal timing, meeting SERDES and PCIe Gen3 jitter budgets.	Use Scenario: Converting differential or single-ended high-speed data streams (e.g., LVDS, PECL, CML derivatives) into CMOS-compatible logic levels. IC Role / Device Role / Timing Role: High-bandwidth analog comparator translating analog waveform crossings into deterministic digital transitions. Use Value: 100 MHz input frequency rating and 3.2 mA output drive allow direct interfacing with FPGA I/O banks and ASIC inputs without buffering.
Zero-Crossing Detector	ADC Sampling Trigger Generator
Use Scenario: Detecting polarity reversals in AC signals (e.g., audio, power monitoring, motor phase sensing) with minimal latency and no DC offset drift. IC Role / Device Role / Timing Role: Precision comparator with rail-to-rail input enabling accurate detection at true 0 V crossing point. Use Value: Input offset voltage ≤7 mV and ΔV_OS/ΔT = 4 μV/°C ensure crossing accuracy remains within ±10 mV across industrial temperature range.	Use Scenario: Generating precise, low-jitter sample pulses for high-speed analog-to-digital converters in instrumentation and communications systems. IC Role / Device Role / Timing Role: Latched comparator providing deterministic, noise-immune trigger edge synchronized to input signal transitions. Use Value: 0.5 ns latch setup/hold time and 4 ns propagation delay enable sub-250 MSPS sampling with <50 ps timing uncertainty.

High-Speed Clock Recovery

Line Receiver for Digital Communications

Use Scenario: Recovering clean square-wave clocks from distorted, attenuated, or noisy high-frequency transmission lines (e.g., backplanes, cables, PCB traces).

IC Role / Device Role / Timing Role: Comparator acting as threshold detector with matched propagation paths to preserve duty cycle and minimize jitter.

Use Value: 4 ns delay and ≤2.0 ns delay mismatch ensure recovered clock edges align within ±1 ns of ideal timing, meeting SERDES and PCIe Gen3 jitter budgets.

Use Scenario: Converting differential or single-ended high-speed data streams (e.g., LVDS, PECL, CML derivatives) into CMOS-compatible logic levels.

IC Role / Device Role / Timing Role: High-bandwidth analog comparator translating analog waveform crossings into deterministic digital transitions.

Use Value: 100 MHz input frequency rating and 3.2 mA output drive allow direct interfacing with FPGA I/O banks and ASIC inputs without buffering.

Zero-Crossing Detector

ADC Sampling Trigger Generator

Use Scenario: Detecting polarity reversals in AC signals (e.g., audio, power monitoring, motor phase sensing) with minimal latency and no DC offset drift.

IC Role / Device Role / Timing Role: Precision comparator with rail-to-rail input enabling accurate detection at true 0 V crossing point.

Use Value: Input offset voltage ≤7 mV and ΔV_OS/ΔT = 4 μV/°C ensure crossing accuracy remains within ±10 mV across industrial temperature range.

Use Scenario: Generating precise, low-jitter sample pulses for high-speed analog-to-digital converters in instrumentation and communications systems.

IC Role / Device Role / Timing Role: Latched comparator providing deterministic, noise-immune trigger edge synchronized to input signal transitions.

Use Value: 0.5 ns latch setup/hold time and 4 ns propagation delay enable sub-250 MSPS sampling with <50 ps timing uncertainty.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LT1394CS8#TRPBF	7 ns typical propagation delay; no latch function; higher supply current (12 mA typ); input common-mode limited to 1.25 V above V−.	Suitable for general-purpose high-speed comparison where latch is unnecessary and slower timing is acceptable.	Select when latch functionality is not required and legacy LT1394 footprint compatibility is needed.
TLV3501CDR	4.5 ns propagation delay; no latch; rail-to-rail output; 2.7–5.5 V supply; lower input bias current (±1 pA); CMOS input stage.	Better for low-power, high-impedance sensor interfaces; unsuitable for latch-based sampling or bipolar input bias requirements.	Prefer for battery-powered or high-Z applications; avoid where bipolar input stage (for GND-referenced inputs) or latch is mandatory.

Compared with LT1394CS8#TRPBF and TLV3501CDR, AD8611ARMZ-REEL uniquely combines sub-5 ns speed, integrated latch, and true GND-referenced input in an MSOP-8 package - making it the only choice for duty-cycle–critical clock recovery with edge-triggered hold capability.

Availability

AD8611ARMZ-REEL is available at Aetrix Electronics and suitable for high-speed timing circuits, clock distribution networks, and precision line receiver designs requiring stable component supply across industrial temperature range (−40°C to +85°C).

Supply support for AD8611ARMZ-REEL 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.

The AD8611ARMZ-REEL belongs to Analog Devices' precision high-speed comparator product line, engineered specifically for timing-critical applications including clock recovery, line reception, and ADC triggering in communications and test equipment.

FAQ

What is the minimum supply voltage required for the latch function of AD8611ARMZ-REEL to operate?

The latch function of AD8611ARMZ-REEL is not operational below 4.3 V supply voltage. At V+ < 4.3 V, the LATCH pin becomes unresponsive and must be held low. This specification is explicitly defined in the AD8611/AD8612 Rev. B datasheet under "Latch Enable Input" and "General Description." For reliable latching, AD8611ARMZ-REEL must be powered at 4.3 V to 5.0 V with tight regulation.

Can AD8611ARMZ-REEL operate from a 3.0 V single supply, and what are the key performance trade-offs?

Yes, AD8611ARMZ-REEL is fully specified for 3.0 V single-supply operation per Table 2 of the datasheet. At 3 V, input common-mode range shrinks to 0 V to 1.0 V, propagation delay increases to 4.5–6.5 ns, and output swing reduces (VOH = 1.21 V, VOL = 0.3 V). The latch remains inactive. These trade-offs are documented in the "V+ = 3.0 V" section and must be verified against system-level timing and noise margin requirements.

Does AD8611ARMZ-REEL have internal hysteresis, and how is noise immunity achieved?

No, AD8611ARMZ-REEL has no internal hysteresis. Its latch circuitry is explicitly stated to have "no built-in hysteresis" in the datasheet's "Using the Latch" section. Noise immunity must be implemented externally via positive feedback (e.g., resistor network between output and IN+), as detailed in Figure 24 and Equation 1. This design allows programmable hysteresis width independent of supply voltage.

What is the maximum capacitive load AD8611ARMZ-REEL can drive without degrading propagation delay beyond specification?

AD8611ARMZ-REEL maintains its 4–5.5 ns propagation delay specification only with capacitive loads ≤30 pF, as confirmed in Table 7 and Figure 9 of the datasheet. Loads exceeding 30 pF increase delay (e.g., 100 pF → 8 ns), and >500 pF causes output ringing. Layout best practices require minimizing trace length and avoiding stubs to keep total node capacitance within this limit.

Is AD8611ARMZ-REEL pin-compatible with LT1016 or LT1394, and what design changes are needed for replacement?

Yes, AD8611ARMZ-REEL is pin-for-pin compatible with LT1016 and LT1394 in SOIC-8 and MSOP-8 packages, as stated in the "Upgrading the LT1394 and LT1016" section. However, key changes are required: (1) ensure V+ ≥ 4.3 V if using latch; (2) verify input common-mode stays within 0–3.0 V (not 1.25 V above V−); (3) confirm output loading matches 3.2 mA drive; and (4) account for reversed input bias current direction (outward vs. inward).

AD8611ARMZ-REEL Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Package/Case:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: with Latch

Number of Elements:: 1

Output Type:: Complementary, TTL

Voltage - Supply, Single/Dual (±):: 3V ~ 5V

:: 7mV @ 5V

Voltage - Input Offset (Max):: 6µA @ 5V

Current - Input Bias (Max):: -

Current - Output (Typ):: 10mA, 4mA

Current - Quiescent (Max):: 85dB CMRR, 73dB PSRR

CMRR, PSRR (Typ):: 5.5ns

Propagation Delay (Max):: -

Hysteresis:: -40°C ~ 85°C

Operating Temperature:: -

Grade:: -

Qualification:: Surface Mount

:: 8-MSOP

AD8611ARMZ-REEL FAQ

1.How can I place an order for AD8611ARMZ-REEL through Aetrix?

Please submit a Request for Quotation (RFQ) for AD8611ARMZ-REEL 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 AD8611ARMZ-REEL reliable?

The price and inventory of AD8611ARMZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8611ARMZ-REEL is usually 5 days.

3.What payment methods are accepted for AD8611ARMZ-REEL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8611ARMZ-REEL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AD8611ARMZ-REEL?

AD8611ARMZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD8611ARMZ-REEL 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 AD8611ARMZ-REEL?

For technical support, including AD8611ARMZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8611ARMZ-REEL requirements.

6.How does Aetrix verify that AD8611ARMZ-REEL is sourced from the original manufacturer or authorized distributors?

All AD8611ARMZ-REEL 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 AD8611ARMZ-REEL meets industry standards.

7.What is the process for return or replacement of AD8611ARMZ-REEL?

All AD8611ARMZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8611ARMZ-REEL, 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 AD8611ARMZ-REEL part is unused and in its original packaging.

Return procedure for AD8611ARMZ-REEL:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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