6 Bit Digital Step Attenuator

1 MHz to 4000 MHz

21

Rev 2, July 2017

IDTF1912NCGI

Datasheet

F1912 Digital Pin Voltage & Resistance Values (pins not connected)

The following table lists the resistance between various pins and ground when no DC power is applied. When

the device is powered up with +5 Volts DC these same pins should have the measured voltage to ground.

Pin

Name

DC voltage

(volts)

Resistance

(ohms)

13

2.5V

100 kΩ pullup resistor

to internally regulated

2.5 V

3, 4, 5

DATA, CLK, LE

2.5V

100 kΩ pullup resistor

to internally regulated

2.5 V

Logic Voltage applied before Power Supply

possible, then a series resistor of 3kΩ needs to be added in line with each of the logic pins, D0-D3. The other

should be placed close to the device to minimize the impact on switching speed due to stray PCB parasitics.