Overview
The AD8561ARUZ, produced by Analog Devices Inc., is an ultrafast single-supply comparator with a propagation delay of 7 ns. This component features separate input and output sections, allowing the input stage to be operated from either ±5 V dual supplies or a single +5 V supply. The AD8561 is designed for high-speed applications and is particularly suitable for timing circuits, line receivers, and clock recovery due to its closely matched propagation delays for rising and falling signals, which track over temperature.
The AD8561 has the same pinout as the LT1016 but offers 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 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 | 5 V, 100 mV Step with 5 mV Overdrive | - | 7 | - | ns |
| Offset Voltage | VOS | -40°C ≤ TA ≤ +85°C | 2.3 | 7 | 8 | mV |
| Input Bias Current | IB | VCM = 0 V, -40°C ≤ TA ≤ +85°C | -6 | -3 | -3.5 | μA |
| Input Common-Mode Voltage Range | VCM | - | 0 | - | 3.0 | V |
| Common-Mode Rejection Ratio | CMRR | 0 V ≤ VCM ≤ +3.0 V | 65 | 85 | - | dB |
| 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 |
| Analog Supply Current | I– | -40°C ≤ TA ≤ +85°C | 2.3 | 4.5 | 5.5 | mA |
Key Features
- Ultrafast 7 ns propagation delay
- Single supply operation: 3 V to 10 V
- Low power consumption
- Low power latch function
- Separate input and output sections
- Wider common-mode input range including the negative supply rail
- Closely matched propagation delays for rising and falling signals
- 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
- Read channel detection
- PCMCIA cards
- Upgrade for LT1016 designs
Q & A
- What is the propagation delay of the AD8561?
The propagation delay of the AD8561 is 7 ns.
- What are the operating voltage ranges for the AD8561?
The AD8561 can operate from single supplies of 3 V to 10 V or from ±5 V dual supplies.
- What are the key package options 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 over which the AD8561 is specified?
The AD8561 is specified over the industrial temperature range of –40°C to +85°C.
- What are some of the key applications for the AD8561?
The AD8561 is used in high-speed timing circuits, clock recovery, line receivers, digital communications, phase detectors, high-speed sampling, and read channel detection.
- 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 is the common-mode rejection ratio (CMRR) of the AD8561?
The CMRR of the AD8561 is 65 dB to 85 dB.
- 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 -3.5 μA over the industrial temperature range.
- Does the AD8561 have a latch function?
Yes, the AD8561 includes a low power latch function.
- What is the offset voltage of the AD8561?
The offset voltage of the AD8561 is typically 7 mV, with a range of 2.3 mV to 8 mV over the industrial temperature range.
