Overview
The AD8564ARU-REEL, produced by Analog Devices Inc., is a quad 7 ns single-supply comparator. This component is designed to operate with either a 5 V single supply or ±5 V dual supplies, while maintaining CMOS- and TTL-compatible outputs. It is particularly suited for high-speed timing circuits and data communications due to its fast 7 ns propagation delay and independent analog and digital supplies, which provide excellent protection against supply pin interaction.
The AD8564 is pin compatible with the MAX901 and offers lower supply currents. It is available in 16-lead TSSOP, 16-lead narrow body SOIC, and 16-lead plastic DIP packages, and is specified over the industrial temperature range of −40°C to +125°C.
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 | ||
| Input Offset Voltage (VOS) | 2.3 | 7 | mV | ||
| 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 | 70 | dB | |
| Analog Supply Current (I+ANA) | −40°C ≤ TA ≤ +125°C | 10.5 | 14.0 | 17 | mA |
| Digital Supply Current (IDIG) | −40°C ≤ TA ≤ +125°C | 6.0 | 7.0 | 8.0 | mA |
Key Features
- Fast 7 ns propagation delay, making it suitable for high-speed timing circuits and line receivers.
- Operates from 5 V single supply or ±5 V dual supplies with CMOS- and TTL-compatible outputs.
- Independent analog and digital supplies to prevent supply pin interaction.
- Pin compatible with the MAX901 and has lower supply currents.
- All four comparators have similar propagation delays, tracking over temperature and voltage.
- High common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR).
- Available in 16-lead TSSOP, 16-lead narrow body SOIC, and 16-lead plastic DIP packages.
- Specified over the industrial temperature range of −40°C to +125°C.
Applications
The AD8564 is ideal for various high-speed applications, including:
- Timing circuits: Due to its fast propagation delay, it is well-suited for timing and clocking applications.
- Data communications: Its high speed and low propagation delay make it a good choice for data communication circuits.
- Line receivers: The component's fast response time and compatibility with CMOS and TTL outputs make it suitable for line receiver applications.
- Industrial control systems: The AD8564's robust performance over a wide temperature range makes it a reliable choice 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 voltage ranges for the AD8564?
The AD8564 can operate from a 5 V single supply or ±5 V dual supplies.
- What are the typical supply currents for the AD8564?
The typical analog supply current is 14 mA, and the typical digital supply current is 7 mA.
- What is the common-mode rejection ratio (CMRR) of the AD8564?
The CMRR is typically 85 dB.
- 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 temperature range for the AD8564?
The AD8564 is specified 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 is the rise and fall time of the AD8564?
The rise time is typically 3.8 ns, and the fall time is typically 1.5 ns).
- What is the power supply rejection ratio (PSRR) of the AD8564?
The PSRR is typically 70 dB).
- What are some typical applications for the AD8564?
The AD8564 is typically used in timing circuits, data communications, line receivers, and industrial control systems).
