Overview
The AD8564ARZ-REEL7, produced by Analog Devices Inc., is a quad 7 ns single-supply comparator. This component is designed to operate with separate input and output supplies, allowing the input stage to be powered from either ±5 V dual supplies or a single 5 V supply, while maintaining CMOS-/TTL-compatible outputs. The fast 7 ns propagation delay and independent analog and digital supplies make it an excellent choice for high-speed timing circuits, line receivers, and data communications applications.
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 | |
| Large Signal Voltage Gain (AVO) | RL = 10 kΩ | 3000 | V/V | ||
| 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 | |
| Analog Supply Current (I+ANA) | −40°C ≤ TA ≤ +85°C | 10.5 | 14.0 | 15.6 | mA |
| Digital Supply Current (IDIG) | VO = 0 V, RL = ∞ | 6.0 | 7.0 | 8.0 | mA |
| Operating Temperature Range | −40°C | +125°C | °C |
Key Features
- 5 V single-supply operation or ±5 V dual supplies
- Fast 7 ns propagation delay
- Low power consumption
- Separate input and output supplies
- TTL/CMOS logic-compatible outputs
- Wide output swing
- Available in TSSOP, SOIC, and PDIP packages
- Pin compatible with MAX901 with lower supply currents
- Similar propagation delays for all four comparators
- Excellent protection from supply pin interaction
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 for a 200 mV step with 100 mV overdrive, ranging from 6.75 ns to 13 ns over the operating temperature range.
- What are the operating supply voltage options for the AD8564?
The AD8564 can operate from either a single 5 V supply or ±5 V dual supplies.
- What are the package options 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 common-mode rejection ratio (CMRR) of the AD8564?
The CMRR of the AD8564 is 65 dB to 85 dB for 0 V ≤ VCM ≤ 3.0 V.
- What is the input capacitance of the AD8564?
The input capacitance of the AD8564 is 3.0 pF.
- What are the logic output voltage levels for the AD8564?
The logic 1 voltage (VOH) is 2.4 V to 3.5 V, and the logic 0 voltage (VOL) is 0.3 V to 0.4 V.
- What is the operating temperature range of the AD8564?
The AD8564 operates over the industrial temperature range of −40°C to +125°C.
- How does the AD8564 protect against supply pin interaction?
The AD8564 has independent analog and digital supplies, providing excellent protection against supply pin interaction.
- Is the AD8564 pin compatible with other comparators?
Yes, the AD8564 is pin compatible with the MAX901 and has lower supply currents.
- What are some typical applications of the AD8564?
The AD8564 is typically used in high-speed timing circuits, line receivers, data communications, and high-speed V-to-F converters.
