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Analog Devices Inc. AD8561ARUZ
- Part No.:
- AD8561ARUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD8561ARUZ.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,338
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Product details
Overview
AD8561ARUZ from Analog Devices is a single ultrafast 7 ns rail-to-rail input comparator with latch function, operating from 3 V to 10 V single supply or ±5 V dual supplies. It delivers matched rising/falling propagation delay (ΔtP ≤ 2.0 ns), 0 V to +3.0 V input common-mode range including ground, and TTL/CMOS-compatible digital outputs - enabling precise clock recovery in high-speed serial links.
For engineers reviewing the AD8561ARUZ datasheet, AD8561ARUZ pinout, AD8561ARUZ application, or AD8561ARUZ equivalent, this page provides verified technical context, real-world timing behavior, latch timing constraints, package-specific thermal data, and validated drop-in alternatives for industrial timing and line receiver designs.
Technical Context
The AD8561ARUZ uses a PNP differential input stage enabling rail-to-rail input common-mode operation down to ground and up to +3.0 V on single supply, with input bias current flowing out of both inputs (–3 μA typical). Its latch circuit accepts TTL/CMOS logic levels (VIL ≤ 0.8 V, VIH ≥ 2.0 V) and requires 1.0 ns setup and 1.2 ns hold time relative to latch enable edge.
Propagation delay is specified at 6.75 ns (typ) for 200 mV step with 100 mV overdrive, with <1 ns dispersion across temperature (–40°C to +85°C) and load capacitance (≤50 pF). Output drive capability supports 3.2 mA sink/source while maintaining VOL ≤ 0.4 V and VOH ≥ 2.4 V - compatible with standard TTL loads without external pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 6.75 ns typical (200 mV step, 100 mV overdrive) - enables sub-10 ns timing-critical decisions in clock distribution paths. |
| Input Common-Mode Range | 0 V to +3.0 V on single +5 V supply - supports ground-referenced signals and eliminates level-shifting in mixed-voltage systems. |
| Output Drive | 3.2 mA sink/source, VOL ≤ 0.4 V, VOH ≥ 2.4 V - directly interfaces with TTL/CMOS logic without external resistors. |
| Latch Enable Timing | 1.0 ns setup / 1.2 ns hold - allows precise data capture synchronized to high-frequency clocks with minimal timing margin. |
| Supply Range | +3 V to +10 V single supply or ±5 V dual supply - accommodates legacy 5 V systems and modern low-voltage embedded rails. |
| Input Offset Voltage | 2.3 mV max (–40°C to +85°C) - ensures stable threshold detection in precision timing and phase comparison circuits. |
| Power Consumption | 6.0 mA total supply current at +5 V - reduces thermal load in dense timing modules versus older comparators like LT1016 (25 mA). |
Pinout & Package
AD8561ARUZ is packaged in an 8-lead TSSOP (RU-8) with 0.65 mm pitch, 3.0 mm × 4.4 mm body, and coplanarity ≤ 0.10 mm - optimized for automated SMT assembly and thermal performance (θJA = 240°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V+) | Positive Supply | Accepts +3 V to +10 V; powers output stage and internal bias networks. |
| 2 (IN–) | Inverting Input | Differential input node; PNP-based input stage draws current outward. |
| 3 (IN+) | Noninverting Input | Differential input node; same bias behavior as IN–; supports rail-to-rail common-mode. |
| 4 (GND) | Ground Reference | Return path for V+ supply and output stage; must be low-inductance for high-speed stability. |
| 5 (LATCH) | Latch Enable Control | TTL/CMOS-compatible input; high level freezes output state; requires 1 ns setup/1.2 ns hold. |
| 6 (OUT) | Digital Output | Active-pull TTL-compatible output; sinks 3.2 mA, sources 3.2 mA; no external pull-up needed. |
| 7 (V–) | Negative Supply | Accepts 0 V (ground) or –5 V; enables dual-supply operation and extended input range. |
| 8 (NC) | No Connect | Internally unused; must remain unconnected per datasheet - not tied to GND or V–. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | 0 V to +3.0 V on +5 V supply - eliminates need for input voltage translation in ground-referenced signal chains. |
| Matched rising/falling propagation delay | ΔtP ≤ 2.0 ns - preserves duty cycle integrity in clock recovery and phase detector applications. |
| Integrated latch with nanosecond timing | 1.0 ns setup / 1.2 ns hold - enables synchronous sampling of high-speed analog events without external flip-flops. |
| Low power consumption | 6.0 mA total supply current - cuts power by 76% vs. LT1016 (25 mA), critical for thermally constrained PCB layouts. |
| Single-supply compatibility | Operates from +3 V to +10 V - supports battery-powered instrumentation and industrial 3.3 V/5 V systems. |
Applications
| High-Speed Clock Recovery | Line Receiver for Serial Data |
|---|---|
|
Use Scenario: Recovering clean clock signals from jittered NRZ data streams in optical transceivers or SATA receivers. IC Role / Device Role / Timing Role: Comparator acting as zero-crossing detector with matched delay to preserve input duty cycle at output. Use Value: ΔtP ≤ 2.0 ns ensures recovered clock maintains original data stream's 50% duty cycle within ±1%, reducing bit error rate. |
Use Scenario: Converting differential LVDS or PECL signals to single-ended TTL levels for FPGA or ASIC interface. IC Role / Device Role / Timing Role: High-speed line receiver with 7 ns propagation delay and 3.2 mA drive strength. Use Value: 6.75 ns typical tP and 3.2 mA output support >100 Mbps data rates with deterministic timing margins. |
| Phase Detector in PLL Loops | Read Channel Detection in Storage Controllers |
|
Use Scenario: Detecting phase difference between reference and feedback clocks in integer-N PLLs for RF synthesizers. IC Role / Device Role / Timing Role: Fast comparator generating UP/DOWN pulses with minimal propagation skew. Use Value: Matched rising/falling delay minimizes static phase error in charge pump current integration. |
Use Scenario: Threshold detection of analog readback signals from magnetic HDD heads or NAND flash sense amplifiers. IC Role / Device Role / Timing Role: Precision window comparator triggering ADC sampling or error correction logic. Use Value: 2.3 mV max offset voltage ensures consistent decision thresholds across temperature for reliable data recovery. |
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 | 10 ns typical propagation delay; +1.25 V to +3.5 V input range; 25 mA supply current; same RU-8 pinout. | Lower speed and narrower input range limit use in >50 Mbps clock recovery; higher power increases thermal density. | Select only when legacy LT1016 footprint reuse is mandatory and speed/power trade-offs are acceptable. |
| MAX961ESA+ | 4.5 ns typical tP; rail-to-rail input (0 V to VCC); 12 mA supply current; SO-8 package (not pin-compatible). | Higher speed enables >200 Mbps line rates but requires PCB redesign; no integrated latch function. | Choose when maximum speed is critical and latch functionality can be implemented externally or omitted. |
Compared with LT1016CN8#PBF and MAX961ESA+, the AD8561ARUZ uniquely balances 7 ns speed, integrated latch, rail-to-rail input, and 6 mA power in a drop-in RU-8 package - making it optimal for space-constrained clock recovery where timing predictability and low thermal impact are essential.
Availability
AD8561ARUZ is available at Aetrix Electronics and suitable for high-speed timing, clock distribution, and line receiver applications requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for AD8561ARUZ 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 DSP technologies, serving industrial, communications, and automotive markets since 1965.
The AD8561 belongs to Analog Devices' precision high-speed comparator product line, designed specifically for timing-critical applications including clock recovery, phase detection, and digital communications where propagation delay matching and latch synchronization are essential.
FAQ
What is the maximum recommended capacitive load for the AD8561ARUZ output?
The AD8561ARUZ output must not drive more than 50 pF of capacitive load. Exceeding this causes ringing and bandwidth reduction, degrading timing accuracy. For loads >50 pF, add a series resistor (e.g., 22 Ω) near the output pin to dampen oscillation while preserving AD8561ARUZ propagation delay integrity.
Does the AD8561ARUZ require external pull-up resistors on its output?
No, the AD8561ARUZ output is actively driven high and low, delivering 3.2 mA source/sink capability with VOH ≥ 2.4 V and VOL ≤ 0.4 V at +5 V supply - fully compatible with TTL/CMOS logic without external pull-ups. Adding a pull-up may distort rise/fall times and is unnecessary for AD8561ARUZ operation.
Can the AD8561ARUZ operate from a 3.3 V supply?
Yes, the AD8561ARUZ is fully specified from +3 V to +10 V single supply. At +3.3 V, propagation delay increases to 8.5 ns (typ), VOH drops to ≥1.21 V, and VOL remains ≤0.3 V - sufficient for interfacing with 3.3 V logic families. Ensure input common-mode stays within 0 V to +1.5 V for optimal performance at 3.3 V, per datasheet Figure 8.
Is the AD8561ARUZ pin-compatible with the LT1016?
Yes, the AD8561ARUZ shares identical pinout and footprint with the LT1016 in TSSOP (RU-8), SOIC (R-8), and PDIP (N-8) packages. This allows direct replacement without PCB changes, though designers must verify input voltage range (0 V to +3.0 V vs. +1.25 V to +3.5 V) and reduced supply current (6 mA vs. 25 mA) for system-level compatibility.
What is the purpose of Pin 8 (NC) on the AD8561ARUZ?
Pin 8 on the AD8561ARUZ is a no-connect terminal - internally unconnected and electrically isolated. It must remain floating and must not be tied to GND, V+, or any other net. Connecting Pin 8 violates the AD8561ARUZ absolute maximum ratings and may cause unpredictable behavior or damage due to internal parasitic coupling paths.
AD8561ARUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tube
- 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-TSSOP
AD8561ARUZ FAQ
1.How can I place an order for AD8561ARUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8561ARUZ 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 AD8561ARUZ reliable?
The price and inventory of AD8561ARUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8561ARUZ is usually 5 days.
3.What payment methods are accepted for AD8561ARUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8561ARUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8561ARUZ?
AD8561ARUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8561ARUZ 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 AD8561ARUZ?
For technical support, including AD8561ARUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8561ARUZ requirements.
6.How does Aetrix verify that AD8561ARUZ is sourced from the original manufacturer or authorized distributors?
All AD8561ARUZ 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 AD8561ARUZ meets industry standards.
7.What is the process for return or replacement of AD8561ARUZ?
All AD8561ARUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8561ARUZ, 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 AD8561ARUZ part is unused and in its original packaging.
Return procedure for AD8561ARUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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