Overview
The AD8561ARU-REEL, produced by Analog Devices Inc., is an ultrafast single-supply comparator with a propagation delay of just 7 ns. This component is designed for high-speed applications and features separate input and output sections. It can operate with single supplies ranging from 3 V to 10 V and is also compatible with ±5 V dual supplies. The AD8561 is an upgrade to the LT1016, offering lower supply current and a wider common-mode input range that includes the negative supply rail. It is available in 8-lead plastic DIP, 8-lead TSSOP, and 8-lead narrow SOIC surface-mount packages, making it versatile for various design needs.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Propagation Delay | tP | 5 V, 100 mV step with 5 mV overdrive | - | 7 | - | ns |
| Rise Time | tR | 20% to 80% | - | 2.0 | - | ns |
| Fall Time | tF | 80% to 20% | - | 3.8 | - | ns |
| Offset Voltage | VOS | VCM = 0 V | - | 7 | - | mV |
| Input Bias Current | IB | VCM = 0 V, –40°C ≤ TA ≤ +85°C | -6 | -3.0 | -4 | μA |
| Input Common-Mode Voltage Range | VCM | - | 0 | - | +1.5 | V |
| Common-Mode Rejection Ratio | CMRR | 0.1 V ≤ VCM ≤ 1.5 V | - | 60 | - | dB |
| Output High Voltage | VOH | IOH = –3.2 mA, VIN > 250 mV | - | 1.21 | - | V |
| Output Low Voltage | VOL | IOL = +3.2 mA, VIN > 250 mV | - | 0.3 | - | V |
| Positive Supply Current | I+ | –40°C ≤ TA ≤ +85°C | 4.0 | 4.5 | 5.5 | mA |
| Ground Supply Current | IGND | –40°C ≤ TA ≤ +85°C | 1.6 | 2.5 | 3.0 | mA |
Key Features
- Ultrafast 7 ns propagation delay, making it suitable for high-speed timing circuits and line receivers.
- Single supply operation from 3 V to 10 V and compatible with ±5 V dual supplies.
- Low power consumption with lower supply current compared to the LT1016.
- Wider common-mode input range that includes the negative supply rail.
- Available in 8-lead plastic DIP, 8-lead TSSOP, and 8-lead narrow SOIC surface-mount packages.
- Latch function for additional control.
- Closely matched and temperature-tracked propagation delays for rising and falling signals.
Applications
- High-speed timing circuits.
- Clock recovery and clock distribution.
- Line receivers.
- Digital communications.
- Phase detectors.
- High-speed sampling and read channel detection.
- PCMCIA cards.
Q & A
- What is the propagation delay of the AD8561 comparator?
The AD8561 has a propagation delay of 7 ns. - What are the operating supply voltage ranges for the AD8561?
The AD8561 can operate with single supplies from 3 V to 10 V and is also compatible with ±5 V dual supplies. - What are the key package options available for the AD8561?
The AD8561 is available in 8-lead plastic DIP, 8-lead TSSOP, and 8-lead narrow SOIC surface-mount packages. - How does the AD8561 compare to the LT1016?
The AD8561 has the same pinout as the LT1016 but offers lower supply current and a wider common-mode input range. - What are some typical applications of the AD8561?
The AD8561 is used in high-speed timing circuits, clock recovery, line receivers, digital communications, phase detectors, and high-speed sampling. - What is the temperature range over which the AD8561 is specified?
The AD8561 is specified over the industrial temperature range of –40°C to +85°C. - Does the AD8561 have a latch function?
Yes, the AD8561 includes a latch function for additional control. - How does the AD8561 handle common-mode input voltage?
The AD8561 has a wide common-mode input voltage range that includes the negative supply rail. - What is the common-mode rejection ratio (CMRR) of the AD8561?
The CMRR of the AD8561 is 60 dB. - What is the output high voltage of the AD8561?
The output high voltage (VOH) of the AD8561 is 1.21 V when IOH = –3.2 mA and VIN > 250 mV.
