MAX49140AXKSLASHV+T datasheet(11/13 Pages) MAXIM

Part #	MAX49140AXK/V+T

Description	30ns, Low-Power, 3V/5V, Rail-to-Rail Single-Supply Comparator

PDF	13 Pages

Scroll/Zoom	100%

Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

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11 / 13 page

Applications Information

Circuit Layout and Bypassing

The high-gain bandwidth of the MAX49140 requires design precautions to realize the full high-speed capabilities of this

comparator. The recommended precautions are:

1) Use a PCB with a good, unbroken, low-inductance ground plane.

2) Place a decoupling capacitor (a 0.1μF ceramic capacitor is a good choice) as close to VDD as possible.

3) Pay close attention to the decoupling capacitor’s bandwidth, keeping leads short.

4) On the inputs and outputs, keep lead lengths short to avoid unwanted parasitic feedback around the comparator.

5) Solder the device directly to the PCB instead of using a socket.

Typical Applications

Figure 4 and Figure 5 show two typical applications.

MAX512

8-BIT DAC

VREFC

VDD

SDI

SERIAL

DIGITAL

INPUT

DACOUTC

GND

VSS

ANALOG IN

MAX49140

VDD = 3.3V

Figure 4. 3.3V Digitally Controlled Threshold Detector

20kΩ

COAX LINE

MAX49140

VDD = 3V

20kΩ

10kΩ

CLEAN

DIGITAL

SIGNAL

Figure 5. Line Receiver Application

MAX49140

30ns, Low-Power, 3V/5V, Rail-to-Rail Single-

Supply Comparator

www.maximintegrated.com

19-100740

Maxim Integrated | 11

MAX49140AXK/V+T Datasheet(PDF) 11 Page - Maxim Integrated Products

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