Overview
The AD8561ANZ, produced by Analog Devices Inc., is an ultrafast single-supply comparator with a propagation delay of just 7 ns. This device features separate input and output sections, allowing the input stage to be operated from either ±5 V dual supplies or +5 V single supplies. The AD8561 is designed for high-speed applications, making it suitable for timing circuits, line receivers, clock recovery, and digital communications. It is available in 8-lead plastic DIP, 8-lead TSSOP, and 8-lead narrow SOIC surface-mount packages, and is specified over the industrial temperature range of –40°C to +85°C.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Propagation Delay | tP | V+ = 5 V, 100 mV Step with 5 mV Overdrive | 7 | 8 | ns | |
| Offset Voltage | VOS | –40°C ≤ TA ≤ +85°C | 1 | 7 | 8 | mV |
| Input Bias Current | IB | VCM = 0 V, –40°C ≤ TA ≤ +85°C | –6 | –3 | –2.5 | μA |
| Input Common-Mode Voltage Range | VCM | –5.0 | +3.0 | V | ||
| Positive Supply Current | I+ | –40°C ≤ TA ≤ +85°C | 4.5 | 6.0 | 7.5 | mA |
| Ground Supply Current | IGND | VO = 0 V, RL = ∞, –40°C ≤ TA ≤ +85°C | 2.2 | 3.3 | 3.8 | mA |
Key Features
- Ultrafast 7 ns propagation delay at 5 V single supply operation
- Low power consumption with separate supplies for input and output stages
- Low supply current: 4.5 mA to 7.5 mA for positive supply, and 2.2 mA to 3.8 mA for ground supply
- Wide common-mode input range including the negative supply rail
- Latch function for data retention with setup and hold times of 2 ns to 3 ns and 3 ns respectively
- Available in 8-lead plastic DIP, 8-lead TSSOP, and 8-lead narrow SOIC surface-mount packages
- Specified over the industrial temperature range of –40°C to +85°C
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 and upgrades for LT1016 designs
Q & A
- What is the propagation delay of the AD8561 comparator?
The AD8561 has a propagation delay of 7 ns at 5 V single supply operation.
- What are the available package types for the AD8561?
The AD8561 is available in 8-lead plastic DIP, 8-lead TSSOP, and 8-lead narrow SOIC surface-mount packages.
- What is the temperature range for which the AD8561 is specified?
The AD8561 is specified over the industrial temperature range of –40°C to +85°C.
- What is the common-mode input range of the AD8561?
The common-mode input range of the AD8561 includes –5.0 V to +3.0 V.
- Does the AD8561 have a latch function?
Yes, the AD8561 has a latch function that allows data retention at the output with setup and hold times of 2 ns to 3 ns and 3 ns respectively.
- What are some typical applications of the AD8561?
The AD8561 is typically used in high-speed timing circuits, clock recovery, line receivers, digital communications, phase detectors, and high-speed sampling.
- How does the AD8561 compare to the LT1016?
The AD8561 has the same pinout as the LT1016 but with lower supply current and a wider common-mode input range.
- What is the power supply range for the AD8561?
The AD8561 can operate from 3 V to 10 V single supply or ±5 V dual supplies.
- What is the input bias current of the AD8561?
The input bias current of the AD8561 is typically –3 μA with a range of –6 μA to –2.5 μA over the industrial temperature range.
- Does the AD8561 have built-in hysteresis in its latch circuitry?
No, the latch circuitry in the AD8561 does not have built-in hysteresis.
