ALD4301APBL

Current - Output (Typ):	60mA @ 5V
Supplier Device Package:	14-PDIP
Mounting Type:	Through Hole
Package / Case:	14-DIP (0.300", 7.62mm)
Operating Temperature:	0°C ~ 70°C
Hysteresis:	--
Propagation Delay (Max):	--
CMRR, PSRR (Typ):	--
Current - Quiescent (Max):	350µA
Series:	--
Current - Input Bias (Max):	30pA @ 5V
Voltage - Input Offset (Max):	5mV @ 5V
Voltage - Supply, Single/Dual (±):	3 V ~ 10 V, ±1.5 V ~ 5 V
Output Type:	CMOS, NMOS, Open-Drain, TTL
Number of Elements:	4
Type:	General Purpose
Part Status:	Active
Packaging:	Tube

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ALD4301APBL application field and working principleALD4301APBL (High Slew Rate Latching Dual Comparator) is a dual-channel comparator under the “Linear – Comparators” category. It is designed for applications that require high-speed decision making. Such applications include data acquisition, video signal processing, and interface communication.The ALD4301APBL features a wide supply voltage range (2.5V - 9V) and high input impedance (200 kΩ). It also includes an active-low push-pull output with a fast response time (~7ns) and an output current of up to 600 mA. The chip also integrates an adjustable hysteresis level and a low power-down mode. Furthermore, the ALD4301APBL is designed for operation with an operating temperature range between -40°C and 125°C.Working PrincipleThe ALD4301APBL family of dual comparators utilizes an open-collector output structure with an NPN transistor-based driver circuit. The Circuit is composed of two transistor-based toggling devices, each with a single input and an output connected to the chip’s VDD/GND pins. When the input logic level is above or below the working hysteresis level, the NPN transistor’s emitter port is used to produce a logic level in the output. This leads to the implementation of a latching comparator.This advanced open-collector circuit design provides an enhanced slew rate (300 µs/V) and faster output response time of 7ns. Moreover, the emitter follower circuit ensures minimal cross-over distortion if the input signal is repeated. Furthermore, the latch logic associated with the circuit makes it ideal for applications like data processing, where there is a need to capture two bits complements only once.Comparator Hysteresis AdjustmentThe ALD4301APBL contains an adjustable hysteresis, which allows for the control of the level of comparator output volatility. This is done by controlling the pin voltage of HYST (Hysterisis setting pin). Setting the voltage level at HYST to the rated value allows for an increase in hysteresis level difference, resulting in a higher input voltage threshold of the comparator. This increases the noise suppression in the circuit, and hence aids in more accurate operation of the comparator.Further, the active-low push-pull output of the ALD4301APBL provides high-current capability. The circuit is full bridge, which enables the output to drive heavy loads and also has fast response time of up to 7ns, making it suitable for high-speed circuit applications such as digital data acquisition systems.Low power-down modeThe ALD43P03APBL comparator offers a low power-down mode for low power consumption. This mode stops the output from switching and can be controlled by the HYSEN pin. When the HYSEN pin voltage is below the 1.2V limit, the power-down mode is activated and the comparator is enabled. The power-down mode also reduces the growing heat dissipation caused due to increased switching frequency in the comparator circuits.ConclusionThe ALD4301APBL is an ideal solution for applications that require high-speed, efficient decision making. It features a wide supply voltage range, adjustable hysteresis, high input impedance, and fast response time making it suitable for a multitude of applications. Additionally, it includes a low power-down mode, which helps reduce power consumption and heat dissipation when the circuit is idle. With its versatile features, the ALD4301APBL ensures precise and accurate performance.

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