lt5581 Linear Technology Corporation, lt5581 Datasheet - Page 15

• Manufacturer Part Number: lt5581
• Description: 6ghz Rms Power Detector With 40db Dynamic Range
• Manufacturer: Linear Technology Corporation

PACKAGE DESCRIPTION
2.55 ±0.05
APPLICATIONS INFORMATION
resulting deviation in the output voltage of the detector
shows the effect of the internal 150kHz fi lter.
The output voltage noise density and integrated noise are
shown in Figures 12 and 13, respectively, for various input
power levels. Noise is a strong function of input level. There
is roughly a 10dB reduction in the output noise level for
an input level of 0dBm versus no input.
Enable Pin
A simplifi ed schematic of the EN pin is shown in Figure
14. To enable the LT5581, it is necessary to put greater
than 1V on this pin. To disable or turn off the chip, this
voltage should be below 0.3V. At an enable voltage of
3.3V, the pin draws roughly 20μA. If the EN pin is not
connected, the chip is disabled through an internal 500k
pull-down resistor.
NOTE:
1. DRAWING CONFORMS TO VERSION (WECD-1) IN JEDEC PACKAGE OUTLINE M0-229
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
1.15 ±0.05
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
0.25 ± 0.05
0.61 ±0.05
(2 SIDES)
2.20 ±0.05
(2 SIDES)
0.50 BSC
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
0.70 ±0.05
PACKAGE
OUTLINE
(Reference LTC DWG # 05-08-1702 Rev B)
(SEE NOTE 6)
8-Lead Plastic DFN (3mm × 2mm)
TOP MARK
PIN 1 BAR
0.200 REF
DDB Package
3.00 ±0.10
(2 SIDES)
It is important that the voltage applied to the EN pin never
exceeds V
current may be sourced through the upper ESD protection
diode connected at the EN pin.
Figure 14. Enable Pin Simplifi ed Schematic
0.75 ±0.05
2.00 ±0.10
CC
(2 SIDES)
2
LT5581
EN
by more than 0.5V, otherwise, the supply
0 – 0.05
500k
R = 0.05
0.56 ± 0.05
(2 SIDES)
V
TYP
CC
BOTTOM VIEW—EXPOSED PAD
0.25 ± 0.05
R = 0.115
300k
TYP
4
5
2.15 ±0.05
(2 SIDES)
300k
8
1
5581 F14
0.50 BSC
LT5581
0.40 ± 0.10
PIN 1
R = 0.20 OR
0.25 × 45°
CHAMFER
(DDB8) DFN 0905 REV B
15
5581f