ADL5910ACPZN-R7 datasheet(21/22 Pages) AD

21 / 22 page

Data Sheet

ADL5910

Rev. 0 | Page 21 of 22

Component

Function

Notes

Default Values1

VPOS, GND, C11, C12

Power supply interface

Apply the 3.3 V power supply for the evaluation

board to the VPOS (red) and GND (black) test

loops. The nominal supply decoupling consists

of a 100 pF capacitor and a 0.1 µF capacitor, with

the 100 pF capacitor placed closest to the VPOS

pin (Pin 5).

C12 = 0.1 µF (0402),

C11 = 100 pF (0402),

VPOS = 3.3 V

Q, Q, R36, DS1

Threshold detect output

(Q and Q)

The threshold detect flip flop outputs (Q and Q)

are available on the Q and Q yellow test loops.

The Q output drives the DS1 flashing LED.

R36 = 1 kΩ

ENBL, S2, R1

Enable interface

Apply 3.3 V to the ENBL yellow test loop or assert

the S2 switch, to enable the ADL5910. The enable

voltage must be equal to but not greater than

the 3.3 V supply voltage. R1 provides current

limiting in case a voltage is connected to the

ENBL test loop when Switch S2 is in Position 3.

R1 = 1.1 kΩ (0603)

S1 push-button switch,

R3, R5, C3

Threshold detect reset

The threshold detection flip flop is reset by using

the RST push button switch. The RST switch is

connected to the VPOS supply voltage through

a 1.1 kΩ resistor (R3). A 10 kΩ pull-down resistor

(R5) is connected to the RST pin, which pulls

RST low in the absence of any other stimulus.

The ADL5910 normally powers up with the Q

and Q outputs high and low, respectively. To

implement a reset on the power-up circuit, install a

capacitor (C3). When ENBL is asserted, RST goes

high shortly before being pulled back low by R5.

R3 = 1.1 kΩ (0603),

R5 = 10 kΩ (0603),

C3 = open/DNI (0603)

R4, C13

Decoupling network for

the DECL pin

Resistor R4 and Capacitor C13 provide

decoupling for the DECL pin of the ADL5910.

R4 = 4.02 Ω (0402),

C13 = 0.1 µF (0402)

DNI means do not install.

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