Analog Devices Inc. AD8611ARM-R2

The AD8611ARM-R2, produced by Analog Devices Inc., is an ultrafast, single-supply comparator with a propagation delay of 4 ns. This device is part of the AD8611/AD8612 family, which includes single and dual comparators with latch function and complementary output. The AD8611 is designed to operate over the industrial temperature range of −40°C to +85°C and is available in 8-lead MSOP and narrow 8-lead SOIC surface-mount packages.

The AD8611 offers several key improvements over its predecessors, such as the LT1016 and LT1394, including lower supply current, a wider common-mode input range that includes the negative supply rail, and a higher output voltage swing. These features make it an excellent choice for timing circuits, line receivers, and clock recovery applications.

• Ultrafast Propagation Delay: 4 ns propagation delay, making it suitable for high-speed applications such as timing circuits and line receivers.
• Matched Delay: Propagation delays for rising and falling signals are closely matched and tracked over temperature, ideal for clock recovery.
• Low Supply Current: Lower supply current compared to predecessors like the LT1016 and LT1394.
• Wide Common-Mode Input Range: Includes the negative supply rail, extending down to the negative supply voltage and within 2 V of the positive supply voltage.
• High Output Voltage Swing: Can swing within 200 mV of ground and within 1.5 V of the positive supply voltage.
• Latch Function: Features a latch function, though it is not functional if VCC is less than 4.3 V.
• Complementary Output: Provides complementary output signals.
• Industrial Temperature Range: Specified over the industrial temperature range of −40°C to +85°C.

• Timing Circuits: The fast propagation delay and matched rising and falling edges make it ideal for timing circuits.
• Line Receivers: Suitable for line receiver applications due to its high speed and low delay.
• Clock Recovery: The matched delay ensures that the duty cycle of the output matches the duty cycle of the input, making it a good choice for clock recovery.
• High-Speed Analog-to-Digital Converters (ADCs): Can be used as an upgrade for LT1394 and LT1016 designs in high-speed ADC applications.

1. What is the propagation delay of the AD8611?

   The propagation delay of the AD8611 is 4 ns.

2. What are the package options for the AD8611?

   The AD8611 is available in 8-lead MSOP and narrow 8-lead SOIC surface-mount packages.

3. What is the operating temperature range of the AD8611?

   The AD8611 operates over the industrial temperature range of −40°C to +85°C.

4. What is the input common-mode voltage range of the AD8611?

   The input common-mode voltage range extends down to the negative supply voltage and within 2 V of the positive supply voltage.

5. How does the AD8611 compare to the LT1016 and LT1394 in terms of supply current?

   The AD8611 has lower supply current compared to the LT1016 and LT1394.

6. What is the latch function in the AD8611, and under what conditions is it not functional?

   The AD8611 features a latch function, but it is not functional if VCC is less than 4.3 V.

7. What are the key applications of the AD8611?

   The AD8611 is suitable for timing circuits, line receivers, clock recovery, and high-speed analog-to-digital converters (ADCs).

8. How does the AD8611 handle source resistance and input capacitance?

   Source impedances must be less than 1 kΩ for best performance, and minimizing resistance from the source to the comparator input is necessary to minimize propagation delay.

9. What is the output voltage swing of the AD8611?

   The AD8611 can swing within 200 mV of ground and within 1.5 V of the positive supply voltage.

10. What are the absolute maximum ratings for the AD8611?

    The total analog supply voltage is 7.0 V, and the input voltage must be between VCC +0.3 V and VEE −0.3 V.