Overview
The AD8611ARZ is an ultrafast, single-supply comparator with a latch function and complementary output, manufactured by Analog Devices Inc. This device is notable for its fast 4 ns propagation delay, making it suitable for timing circuits, line receivers, and clock recovery applications. The AD8611ARZ has the same pinout as the LT1016 and LT1394 but offers lower supply current and a wider common-mode input range that includes the negative supply rail. It operates 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.
Key Specifications
| Parameter | Rating/Value |
|---|---|
| Total Analog Supply Voltage | 3 V to 5 V |
| Input Voltage Range | VCC +0.3 V to VEE −0.3 V |
| Differential Input Voltage | ±5 V |
| Input Common-Mode Voltage Range | 0.0 V to 3.0 V (V+ = 5 V, V- = VGND = 0 V, TA = 25°C) |
| Propagation Delay | 4 ns (200 mV step with 100 mV overdrive) |
| Output Type | Complementary, TTL |
| Input Offset Voltage | 1 mV typical (V+ = 5 V, V- = VGND = 0 V, TA = 25°C) |
| Input Bias Current | 6 µA typical (V+ = 5 V) |
| Quiescent Supply Current | 4 mA typical |
| CMRR (Common-Mode Rejection Ratio) | 85 dB typical |
| PSRR (Power Supply Rejection Ratio) | 73 dB typical |
| Operating Temperature Range | −40°C to +85°C |
| Package Type | 8-Lead MSOP, 8-Lead SOIC |
Key Features
- Ultrafast 4 ns propagation delay with 100 mV overdrive.
- Latch function, though not functional if VCC is less than 4.3 V.
- Complementary TTL output.
- Low supply current of 4 mA typical, compared to 25 mA of the LT1016.
- Wide common-mode input range that includes the negative supply rail.
- High common-mode rejection ratio (CMRR) of 85 dB and power supply rejection ratio (PSRR) of 73 dB.
- Fast rise time of 2.5 ns (20% to 80%).
- Low input offset voltage of 1 mV typical and low offset voltage drift of 4 μV/°C.
Applications
- High-speed timing circuits.
- Clock recovery and clock distribution.
- Line receivers.
- Digital communications.
- Phase detectors.
- High-speed sampling and read channel detection.
- PCMCIA cards.
- Zero-crossing detectors.
- High-speed analog-to-digital converters (ADCs) and upgrades for LT1394 and LT1016 designs.
Q & A
- What is the propagation delay of the AD8611ARZ?
The AD8611ARZ has a typical propagation delay of 4 ns with a 100 mV overdrive.
- What are the package options for the AD8611ARZ?
The AD8611ARZ is available in 8-lead MSOP and narrow 8-lead SOIC surface-mount packages.
- What is the operating temperature range of the AD8611ARZ?
The AD8611ARZ operates over the industrial temperature range of −40°C to +85°C.
- How does the AD8611ARZ compare to the LT1016 and LT1394 in terms of supply current?
The AD8611ARZ has a lower supply current of 4 mA typical, compared to 25 mA of the LT1016).
- What is the common-mode rejection ratio (CMRR) of the AD8611ARZ?
The AD8611ARZ has a typical CMRR of 85 dB).
- Can the AD8611ARZ handle high-frequency input signals?
The AD8611ARZ can accurately compare input signals up to 100 MHz with less than 10 mV of overdrive. However, it is not recommended to use input signals above 100 MHz due to potential performance issues).
- What is the output current capability of the AD8611ARZ?
The AD8611ARZ can deliver up to 10 mA of output current without increasing its propagation delay).
- Is the latch function always available on the AD8611ARZ?
The latch function is not functional if VCC is less than 4.3 V).
- What are some typical applications of the AD8611ARZ?
Typical applications include high-speed timing circuits, clock recovery, line receivers, digital communications, phase detectors, and high-speed sampling).
- How does the AD8611ARZ perform in terms of input offset voltage and drift?
The AD8611ARZ has a typical input offset voltage of 1 mV and an offset voltage drift of 4 μV/°C).
