Overview
The AD8564AR-REEL7, produced by Analog Devices Inc., is a quad 7 ns single-supply comparator. This device is designed to operate with either a 5 V single supply or ±5 V dual supplies, while maintaining CMOS- and TTL-compatible outputs. The AD8564 is notable for its fast 7 ns propagation delay, making it suitable for high-speed timing circuits, line receivers, and data communications applications. It is pin compatible with the MAX901 and offers lower supply currents compared to similar devices. The AD8564 is available in 16-lead TSSOP, 16-lead narrow body SOIC, and 16-lead plastic DIP packages, and it is specified over the industrial temperature range of −40°C to +125°C.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Propagation Delay | tP | 200 mV step with 100 mV overdrive | 6.75 | 9.8 | ns | |
| Propagation Delay | tP | 100 mV step with 5 mV overdrive | 8 | 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 | 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 | 80 | dB | ||
| Analog Supply Current | I+ANA | −40°C ≤ TA ≤ +125°C | 10.5 | 14.0 | mA | |
| Digital Supply Current | IDIG | VO = 0 V, RL = ∞ | 6.0 | 7.0 | mA |
Key Features
- Fast 7 ns propagation delay, suitable for high-speed timing circuits and line receivers.
- Single 5 V supply operation or ±5 V dual supplies with separate input and output supplies.
- CMOS- and TTL-compatible outputs with wide output swing.
- Low power consumption with independent analog and digital supplies, providing excellent protection from supply pin interaction.
- 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.
- Pin compatible with the MAX901 and has lower supply currents.
Applications
- High-speed timing circuits.
- Line receivers.
- Data communications.
- High-speed V-to-F converters.
Q & A
- What is the propagation delay of the AD8564?
The propagation delay of the AD8564 is typically 7 ns, with a maximum of 9.8 ns for a 200 mV step with 100 mV overdrive.
- What are the supply voltage options for the AD8564?
The AD8564 can operate with either a single 5 V supply or ±5 V dual supplies.
- What are the output types of the AD8564?
The AD8564 has CMOS- and TTL-compatible outputs.
- What is the common-mode rejection ratio (CMRR) of the AD8564?
The CMRR of the AD8564 is typically 85 dB for 0 V ≤ VCM ≤ 3.0 V).
- What is the power supply rejection ratio (PSRR) of the AD8564?
The PSRR of the AD8564 is typically 80 dB for 4.5 V ≤ V+ANA and V+DIG ≤ 5.5 V).
- 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).
- In what temperature range is the AD8564 specified?
The AD8564 is specified over the industrial temperature range of −40°C to +125°C).
- What packages are available for the AD8564?
The AD8564 is available in 16-lead TSSOP, 16-lead narrow body SOIC, and 16-lead plastic DIP packages).
- Is the AD8564 pin compatible with any other comparators?
Yes, the AD8564 is pin compatible with the MAX901).
- What are some common applications of the AD8564?
The AD8564 is commonly used in high-speed timing circuits, line receivers, data communications, and high-speed V-to-F converters).
