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Analog Devices Inc. AD8561ARZ-REEL7
- Part No.:
- AD8561ARZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8561ARZ-REEL7.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,539
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Product details
Overview
AD8561ARZ-REEL7 from Analog Devices is a single ultrafast comparator with 7 ns propagation delay, rail-to-rail input common-mode range (0 V to +3.0 V), latch enable functionality, and CMOS/TTL-compatible push-pull output. It operates from 3 V to 10 V single supply and is used in clock recovery circuits, high-speed line receivers, and phase detection systems where matched rising/falling edge delays preserve duty cycle fidelity.
For engineers reviewing the AD8561ARZ-REEL7 datasheet, AD8561ARZ-REEL7 pinout, AD8561ARZ-REEL7 application, or AD8561ARZ-REEL7 equivalent, this page delivers verified technical context, exact package mapping (SOIC_N, R-8), latch timing constraints (tS = 1 ns, tH = 1.2 ns), differential propagation delay (ΔtP ≤ 2.0 ns), and real-world substitution guidance for LT1016 upgrades.
Technical Context
The AD8561ARZ-REEL7 employs a PNP differential input stage enabling input common-mode voltage operation down to the negative rail (0 V on single supply) and up to +3.0 V - critical for low-voltage signal comparison without level shifting. Its latch function is edge-triggered via Pin 5 with sub-nanosecond setup/hold timing, allowing precise data capture in high-speed sampling systems.
Propagation delay matching (ΔtP ≤ 2.0 ns over temperature) and tightly controlled rise/fall times (3.8 ns / 1.5 ns) ensure minimal duty cycle distortion in clock distribution paths. The device supports dual-supply operation (±5 V) or single-supply (3–10 V), with separate analog and ground supply current paths (I+ = 4.7–7.5 mA, IGND = 2.2–3.8 mA, I− = 2.4–5.5 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 6.75–9.8 ns at 5 V, 200 mV step with 100 mV overdrive - enables sub-100 MHz timing resolution in clock recovery. |
| Input Common-Mode Range | 0 V to +3.0 V on single supply - supports direct interface with 3.3 V logic and low-voltage sensors without biasing. |
| Differential Propagation Delay | ≤ 2.0 ns (rising vs. falling) - preserves input duty cycle in clock distribution and phase detector applications. |
| Latch Setup/Hold Time | tS = 1.0 ns, tH = 1.2 ns - allows synchronization with <1 ns jitter clocks in high-speed sampling systems. |
| Supply Voltage Range | 3 V to 10 V single supply (or ±5 V dual supply) - accommodates industrial, telecom, and portable designs. |
| Output Drive Capability | VOH = 2.6 V min at –3.2 mA, VOL = 0.3 V max at +3.2 mA - directly drives TTL/CMOS loads without external pull-ups. |
| Input Offset Voltage | 7 mV max (–40°C to +85°C) - ensures reliable threshold detection in precision read channel and line receiver circuits. |
Pinout & Package
AD8561ARZ-REEL7 is packaged in an 8-lead narrow-body SOIC (R-8), RoHS-compliant, with 1.27 mm lead pitch and JEDEC MS-012-AA compliance. Dimensions: 5.00 × 4.00 × 1.50 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V+) | Positive Supply | Accepts 3–10 V single supply or +5 V in dual-supply mode; powers input and output stages. |
| 2 (IN–) | Inverting Input | Differential input node with 3 pF capacitance; PNP input stage draws ~3 μA bias current out of this pin. |
| 3 (IN+) | Noninverting Input | Differential input node; identical bias and capacitance behavior as IN–; common-mode range extends to 0 V. |
| 4 (GND) | Ground Reference | Return path for ground supply current (IGND = 2.2–3.8 mA); must be low-inductance for high-speed stability. |
| 5 (LATCH) | Latch Enable Input | TTL/CMOS-compatible control: VIH ≥ 2.0 V, VIL ≤ 0.8 V; triggers output freeze with 1 ns setup and 1.2 ns hold. |
| 6 (OUT) | Digital Output | Push-pull CMOS/TTL output; drives 3.2 mA sink/source; no external pull-up required for logic-level compatibility. |
| 7 (V–) | Negative Supply | Accepts 0 V (single supply) or –5 V (dual supply); enables extended common-mode range when used with V+ = +5 V. |
| 8 (NC) | No Connect | Internally unconnected; must remain floating - not usable as thermal pad or ground tie. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range (0 V to +3.0 V) | Enables direct comparison of 3.3 V logic signals and low-voltage sensor outputs without external resistive dividers. |
| Matched rising/falling propagation delay (ΔtP ≤ 2.0 ns) | Maintains output duty cycle fidelity in clock recovery and distribution, reducing jitter accumulation across cascaded stages. |
| Integrated latch with nanosecond timing (tS = 1 ns, tH = 1.2 ns) | Supports precise sampling window control in high-speed ADC front-ends and digital communications receivers. |
| Single-supply operation (3 V to 10 V) | Eliminates need for dual supplies in portable, industrial, and telecom line card designs while retaining full performance. |
| Low input bias current (–3 μA typical) | Minimizes voltage error in high-impedance source applications such as photodiode transimpedance amplifier outputs. |
Applications
| High-Speed Clock Recovery | PCMCIA Card Interface |
|---|---|
|
Use Scenario: Extracting clean clock signals from noisy serial data streams in telecom backplanes and FPGA interconnects. IC Role / Device Role / Timing Role: Comparator acting as zero-crossing detector with latch-enabled edge capture to regenerate synchronous clock edges. Use Value: 7 ns propagation delay and matched edge timing (ΔtP ≤ 2.0 ns) minimize recovered clock jitter and maintain bit-error-rate integrity. |
Use Scenario: Detecting card insertion/removal and validating bus signaling levels in legacy PCMCIA host controllers. IC Role / Device Role / Timing Role: High-speed level translator and status comparator interfacing 3.3 V card logic with 5 V host controller timing domains. Use Value: Single-supply 3–10 V operation and 0 V to +3.0 V input range allow direct connection to PCMCIA card I/O pins without level-shifting circuitry. |
| Digital Communications Line Receiver | Phase Detector in PLL Systems |
|
Use Scenario: Converting differential or single-ended NRZ data into clean logic-level signals for SERDES and optical transceiver modules. IC Role / Device Role / Timing Role: Threshold comparator with latch function capturing data valid windows synchronized to local clock domains. Use Value: Sub-10 ns delay and 3.2 mA output drive support >100 Mbps data rates while driving multiple downstream logic gates. |
Use Scenario: Generating phase error pulses in analog/digital PLLs for frequency synthesis in RF synthesizers and clock generators. IC Role / Device Role / Timing Role: Precision phase comparator comparing reference and feedback clock edges to produce UP/DOWN control pulses. Use Value: Matched propagation delay ensures symmetrical UP/DOWN pulse widths, improving loop stability and reducing steady-state phase error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1016CN8#PBF | Slower propagation delay (10 ns typ), higher supply current (25 mA), narrower input common-mode range (+1.25 V to +3.5 V on +5 V supply). | Lacks latch function; requires external latching logic for sampled-data applications. | Select only if legacy footprint compatibility is mandatory and speed/power trade-offs are acceptable. |
| MAX961ASA+ | Faster propagation delay (4.5 ns typ), rail-to-rail inputs (–0.2 V to VCC + 0.2 V), but no latch function and higher input offset (1.5 mV typ). | Optimized for ultra-high-speed ADC drivers and laser diode modulation, not latch-based sampling. | Prefer for pure speed-critical line receivers; avoid where latch synchronization is required. |
Compared with LT1016CN8#PBF and MAX961ASA+, the AD8561ARZ-REEL7 uniquely combines sub-10 ns speed, integrated latch, and 0 V input capability - making it the only choice for duty-cycle-preserving clock recovery with embedded sample-and-hold control in space-constrained SOIC layouts.
Availability
AD8561ARZ-REEL7 is available at Aetrix Electronics and suitable for high-speed timing, clock distribution, and digital communications line receiver applications requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for AD8561ARZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets since 1965.
The AD8561ARZ-REEL7 belongs to Analog Devices' high-speed comparator product line, engineered specifically for applications demanding nanosecond-level timing accuracy, latch-controlled sampling, and robust single-supply operation in noise-sensitive environments.
FAQ
What is the maximum input common-mode voltage for AD8561ARZ-REEL7 on a +5 V single supply?
The AD8561ARZ-REEL7 supports an input common-mode voltage range of 0 V to +3.0 V when operated on a +5 V single supply. Exceeding +3.0 V may increase input bias current and degrade propagation delay performance, as confirmed in Figure 8 of the datasheet. For signals above +3.0 V, level-shifting or attenuation is recommended to maintain specified timing accuracy.
Does AD8561ARZ-REEL7 require external pull-up resistors on its output pin?
No, AD8561ARZ-REEL7 features a push-pull CMOS/TTL-compatible output stage that delivers VOH ≥ 2.6 V at –3.2 mA and VOL ≤ 0.3 V at +3.2 mA. External pull-up resistors are unnecessary for standard logic interfacing. A 5 kΩ pull-up to V+ may be added only to increase output swing in low-voltage (e.g., 3 V) applications - per Application Note page 7.
Can AD8561ARZ-REEL7 replace LT1016 in existing designs without layout changes?
Yes, AD8561ARZ-REEL7 is pin compatible with LT1016 in the same SOIC-8 (R-8) package and shares identical pinout per Figure 18–20 and "Replacing the LT1016" section. However, differences in input range (0–3 V vs. +1.25–3.5 V), lower supply current (5 mA vs. 25 mA), and latch functionality require verification of input signal levels and system timing margins before drop-in replacement.
What is the latch enable timing requirement for reliable data capture in AD8561ARZ-REEL7?
For reliable latch operation, AD8561ARZ-REEL7 requires a minimum setup time (tS) of 1.0 ns and hold time (tH) of 1.2 ns relative to the LATCH pin transition. This means the input signal must be stable ≥1 ns before and ≥1.2 ns after the LATCH edge. Data appears at the output within 8 ns after LATCH returns low, as specified in the "Setup and Hold Times for Latching the Output" section.
Is AD8561ARZ-REEL7 suitable for dual-supply (±5 V) operation?
Yes, AD8561ARZ-REEL7 supports dual-supply operation with V+ = +5 V and V– = –5 V, enabling input common-mode range extension to –5.0 V to +3.0 V. This configuration is explicitly validated in the Electrical Specifications table (Rev. D, page 3) and improves noise immunity in bipolar signal conditioning paths such as audio or sensor front-ends.
AD8561ARZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- CMOS, Complementary, TTL
- Voltage - Supply, Single/Dual (±):
- 3V ~ 10V, ±1.5V ~ 5V
- :
- 7mV @ 5V
- Voltage - Input Offset (Max):
- 6µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 6mA, 3.3mA, 5.5mA
- Current - Quiescent (Max):
- 85dB CMRR, 65dB PSRR
- CMRR, PSRR (Typ):
- 9.8ns
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
AD8561ARZ-REEL7 FAQ
1.How can I place an order for AD8561ARZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8561ARZ-REEL7 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 AD8561ARZ-REEL7 reliable?
The price and inventory of AD8561ARZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8561ARZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8561ARZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8561ARZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8561ARZ-REEL7?
AD8561ARZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8561ARZ-REEL7 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 AD8561ARZ-REEL7?
For technical support, including AD8561ARZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8561ARZ-REEL7 requirements.
6.How does Aetrix verify that AD8561ARZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8561ARZ-REEL7 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 AD8561ARZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8561ARZ-REEL7?
All AD8561ARZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8561ARZ-REEL7, 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 AD8561ARZ-REEL7 part is unused and in its original packaging.
Return procedure for AD8561ARZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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