Overview
The AD8564ARZ-REEL, produced by Analog Devices Inc., is a quad 7 ns single-supply comparator. This component is designed for high-speed applications, offering fast propagation delays and excellent supply isolation. It can operate from either ±5 V dual supplies or a single 5 V supply, while maintaining CMOS-/TTL-compatible outputs. The AD8564 is particularly suited for timing circuits, line receivers, and high-speed data communications due to its fast 7 ns propagation delay and consistent performance over temperature and voltage variations.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Propagation Delay (tP) | 200 mV step with 100 mV overdrive | 6.75 | 9.8 | 13 | ns |
| Differential Propagation Delay (ΔtP) | 100 mV step with 20 mV overdrive | 0.5 | 2.0 | ns | |
| Rise Time (20% to 80%) | 3.8 | ns | |||
| Fall Time (20% to 80%) | 1.5 | ns | |||
| Common-Mode Rejection Ratio (CMRR) | 0 V ≤ VCM ≤ 3.0 V | 65 | 85 | dB | |
| Power Supply Rejection Ratio (PSRR) | 4.5 V ≤ V+ANA and V+DIG ≤ 5.5 V | 50 | 80 | dB | |
| Analog Supply Current (I+ANA) | −40°C ≤ TA ≤ +125°C | 10.5 | 14.0 | 17 | mA |
| Digital Supply Current (IDIG) | VO = 0 V, RL = ∞ | 6.0 | 7.0 | 8.0 | mA |
| Offset Voltage (VOS) | 2.3 | 7 | mV | ||
| Input Capacitance (CIN) | 3.0 | pF | |||
| Logic 1 Voltage (VOH) | IOH = −3.2 mA, ΔVIN > 250 mV | 2.4 | 3.5 | V | |
| Logic 0 Voltage (VOL) | IOL = 3.2 mA, VIN > 250 mV | 0.3 | 0.4 | V |
Key Features
- Fast 7 ns propagation delay, making it suitable for high-speed timing and data communications circuits.
- Separate input and output supplies, allowing operation from ±5 V dual supplies or a single 5 V supply.
- CMOS-/TTL-compatible outputs.
- Independent analog and digital supplies to prevent supply pin interaction.
- Low power consumption with analog supply current of 10.5 mA to 17 mA and digital supply current of 6.0 mA to 8.0 mA.
- High common-mode rejection ratio (CMRR) of up to 85 dB and power supply rejection ratio (PSRR) of up to 80 dB.
- Pin compatible with the MAX901 and lower supply currents compared to MAX901.
- Operates over the industrial temperature range (−40°C to +125°C).
- Available in 16-lead TSSOP, 16-lead narrow body SOIC, and 16-lead plastic DIP packages.
Applications
The AD8564 is ideal for various high-speed applications, including:
- Timing circuits: The fast propagation delay and consistent performance make it suitable for timing circuits.
- Line receivers: Its ability to handle high-speed signals makes it a good choice for line receiver applications.
- Data communications: The component is well-suited for high-speed data communications due to its fast propagation delay and low power consumption.
- Industrial control systems: The industrial temperature range and robust specifications make it suitable for industrial control systems.
Q & A
- What is the propagation delay of the AD8564?
The propagation delay of the AD8564 is typically 9.8 ns for a 200 mV step with 100 mV overdrive.
- What are the operating supply voltage ranges for the AD8564?
The AD8564 can operate from ±5 V dual supplies or a single 5 V supply.
- What is the common-mode rejection ratio (CMRR) of the AD8564?
The CMRR of the AD8564 is up to 85 dB.
- What is the power supply rejection ratio (PSRR) of the AD8564?
The PSRR of the AD8564 is up to 80 dB.
- What are the typical analog and digital supply currents for the AD8564?
The typical analog supply current is 14.0 mA, and the typical digital supply current is 7.0 mA.
- What are the available package types for the AD8564?
The AD8564 is available in 16-lead TSSOP, 16-lead narrow body SOIC, and 16-lead plastic DIP packages.
- What is the operating temperature range of the AD8564?
The AD8564 operates over the industrial temperature range of −40°C to +125°C.
- Is the AD8564 pin compatible with other comparators?
Yes, the AD8564 is pin compatible with the MAX901.
- What are some typical applications for the AD8564?
The AD8564 is typically used in timing circuits, line receivers, and high-speed data communications.
- How does the AD8564 protect against supply pin interaction?
The AD8564 has independent analog and digital supplies to prevent supply pin interaction.
