DC to 6 GHz, ≤45 dB Envelope Threshold

Detector/Trigger

Data Sheet

ADL5910

Rev. 0

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FEATURES

Envelope threshold detection and latching

Broad input frequency range: dc to 6 GHz

±1.0 dB input range: ≤45 dB

±1.0 dB input level: −30 dBm to +15 dBm at 100 MHz

Programmable threshold and latch reset function

Propagation delay: 12 ns typical from RFIN to Q/Q latch

All functions temperature and supply stable

Operates at 3.3 V from −40°C to +105°C

Quiescent current: 3.5 mA typical

Power-down current: 100 μA typical

16-lead, 3 mm × 3 mm LFCSP package

APPLICATIONS

Wireless power amplifier input and output protection

Wireless receiver input protection

RF pulse detection and triggering

FUNCTIONAL BLOCK DIAGRAM

R

ENVELOPE

DETECTOR

+

–

Q

S

ADL5910

VPOS

GND

RST

Q

RFIN

VIN–

ENBL

Q

1

11

DNC

2

3

9

10

14

5

7

12

13

Q

68

16

15

VCAL

Figure 1.

GENERAL DESCRIPTION

The ADL59101 is a radio frequency (RF) detector that operates

from dc to 6 GHz. It provides a programmable envelope

threshold detection function.

The envelope threshold detection function compares the voltage

from an internal envelope detector with a user defined input

voltage. When the voltage from the envelope detector exceeds

the user defined threshold voltage, an internal comparator

captures and latches the event to a set or reset (SR) flip flop.

The response time from the RF input signal exceeding the user

programmed threshold to the output latching is 12 ns. The latched

event is held on the flip flop until a reset pulse is applied.

The RF input of the ADL5910 is dc-coupled, allowing operation

down to arbitrarily low ac frequencies. It operates on a 3.3 V

supply and consumes 3.5 mA. Power-down mode reduces this

current to 100 μA when a logic low is applied to the ENBL pin.

The ADL5910 is supplied in a 3 mm × 3 mm, 16-lead LFCSP for

operation over the wide temperature range of −40°C to +105°C.