LTC5508 Linear Technology, LTC5508 Datasheet

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LTC5508

Manufacturer Part Number
LTC5508
Description
300MHz to 7GHz RF Power Detector with Buffered Output in SC70 Package
Manufacturer
Linear Technology
Datasheet

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FEATURES
APPLICATIO S
TYPICAL APPLICATIO
Temperature Compensated Internal Schottky
Diode RF Detector
Wide Input Frequency Range: 300MHz to 7GHz
Wide Input Power Range: –32dBm to 12dBm
Buffered Detector Output
Wide V
Low Operating Current: 550 A
Low Shutdown Current: <2 A
SC70 Package
802.11a, 802.11b, 802.11g, 802.15
Multimode Mobile Phone Products
Optical Data Links
Wireless Data Modems
Wireless and Cable Infrastructure
RF Power Alarm
Envelope Detector
DISABLE ENABLE
CC
INPUT
300MHz to 7GHz RF Power Detector
Range of 2.7V to 6V
RF
33pF
U
6
2
1
RF
GND
SHDN
LTC5508
IN
V
GND
V
OUT
CC
4
5
3
U
V
OUT
100pF
5508 TA01
0.1 F
V
CC
Detector with Buffered Output
DESCRIPTIO
The LTC
operating in the 300MHz to 7GHz range. A temperature
compensated Schottky diode peak detector and buffer
amplifier are combined in a small SC70 package. The
supply voltage range is optimized for operation from a
single lithium-ion cell or 3xNiMH.
The RF input voltage is peak detected using an on-chip
Schottky diode. The detected voltage is buffered and
supplied to the V
reduces supply current to less than 2 A.
The LTC5508 operates with input power levels from
–32dBm to 12dBm.
300MHz to 7GHz RF Power
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
5508 is an RF power detector for RF applications
10000
1000
100
–32 –28 –24 –20 –16 –12 –8 –4 0
Output Voltage vs RF Input Power
OUT
V
T
CC
A
= 25 C
U
= 3.6V
in SC70 Package
pin. A power saving shutdown mode
1GHz
RF INPUT POWER (dBm)
2GHz
4GHz
6GHz
LTC5508
4
7GHz
5508 TA02
8
12
5508fa
1

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LTC5508 Summary of contents

Page 1

... The RF input voltage is peak detected using an on-chip Schottky diode. The detected voltage is buffered and supplied to the V reduces supply current to less than 2 A. The LTC5508 operates with input power levels from –32dBm to 12dBm. , LTC and LT are registered trademarks of Linear Technology Corporation 100pF 0 ...

Page 2

... Note 3: The rise time at V Note 4: Bandwidth is calculated using the 10% to 90% rise time equation 0.35/rise time. Note 5: RF performance is tested at 1800MHz Note 6: Guaranteed by design ORDER PART NUMBER TOP VIEW LTC5508ESC6 GND SC6 PART SC6 PACKAGE MARKING LAAD ...

Page 3

... C A 100 12 –32 –28 –24 –20 –16 –12 –8 – INPUT POWER (dBm) 10000 1000 100 5508 G07 LTC5508 Typical Detector Characteristics, 2000MHz 10000 V = 3.6V CC 1000 = – 100 ...

Page 4

... LTC5508 W U TYPICAL PERFOR A CE CHARACTERISTICS V Slope vs RF Input Power at OUT 300MHz 1000 V = 3.6V CC 100 T = – –32 –28 –24 –20 –16 –12 –8 – INPUT POWER (dBm) 5508 G09 V Slope vs RF Input Power at ...

Page 5

... Impedance REACTANCE ( ) –63.267 –71.669 –64.607 –54.798 –46.844 –39.753 –32.738 –26.385 –20.478 –15.107 –9.941 –4.793 0.266 5.250 10.267 14.616 18.523 LTC5508 1.000GHz-7.000GHz 5508 TA03 1.000GHz-7.000GHz 5508 TA04 5508fa 5 ...

Page 6

... LTC5508 CTIO S SHDN (Pin 1): Shutdown Input. A logic low on the SHDN pin places the part in shutdown mode. A logic high enables the part. SHDN has an internal 150k pull down resistor to ensure that the part is in shutdown when no input is applied. GND (Pin 2, 5): Ground. ...

Page 7

... The LTC5508 can be used as a self-standing signal strength measuring receiver for a wide range of input signals from –32dBm to 12dBm for frequencies from 300MHz to 7GHz. The LTC5508 can be used as a demodulator for AM and ASK modulated signals with data rates up to 2MHz. Depending on specific application needs, the RSSI output ...

Page 8

... LTC5508 PACKAGE DESCRIPTIO 0.47 0.65 MAX REF 1.16 REF 3.26 MAX 2.1 REF 0.96 MIN RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6 ...

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