LTC5535
Precision 600MHz to 7GHz,
RF Detector with
Adjustable Gain and
12MHz Baseband Bandwidth
FEATURES DESCRIPTIO
Temperature Compensated Internal Schottky The LTC 5535 is an RF power detector for RF applications
Diode RF Detector operating in the 600MHz to 7GHz range. A temperature
Wide Input Frequency Range: 600MHz to 7GHz* compensated Schottky diode peak detector and output
TM
Wide Input Power Range: 32dBm to 10dBm amplifier are combined in a small ThinSOT package. The
External Gain Control supply voltage range is optimized for operation from a
Precision V Offset Control single cell lithium-ion or three cell NiMH battery.
OUT
Low Starting Voltage: 200mV for Gain = 2
The RF input voltage is peak detected using an on-chip
Wide V Range of 2.7V to 5.5V
CC
Schottky diode. The detected voltage is buffered and
Low Operating Current: 2mA
supplied to the V pin.
OUT
Available in a Low Profile (1mm) SOT-23 Package
The LTC5535 output amplifier gain is set via external
U
resistors. The initial starting voltage of 200mV can be
APPLICATIO S
precisely adjusted using the V pin.
OS
802.11a, 802.11b, 802.11g, 802.15, 802.16
The LTC5535 operates with input power levels from
Multimode Mobile Phone Products
32dBm to 10dBm. The 12MHz baseband bandwidth is
Optical Data Links
much higher than that of previous Schottky detector
Wireless Data Modems
products.
Wireless and Cable Infrastructure
, LTC and LT are registered trademarks of Linear Technology Corporation.
RF Power Alarm
ThinSOT is a trademark of Linear Technology Corporation.
*Higher frequency operation is achievable with reduced performance. Consult factory for more
Envelope Detector
information.
TYPICAL APPLICATIO
Output Voltage vs RF Input Power
3600
600MHz to 7GHz RF Power Detector V = 3.6V
CC
T = 25C
3200 A
GAIN = 2
2GHz
2800
V = 0V
OS
33pF
600MHz
LTC5535
1 2400
6 1GHz
RF
V
RF CC V
IN CC
INPUT
5GHz
2000
100pF 0.1F
6GHz
2
5
1600
GND
V
OUT
7GHz
1200
R
A
4GHz
3
4
V
OS 800
V V
OS
M
REFERENCE
5535 TA01 R 400
B
0
32 28 24 20 16 12 8 4 0 48 12
RF INPUT POWER (dBm)
5535 TA02
5535f
1
V OUTPUT VOLTAGE (mV)
OUT
U
ULTC5535
UUW
PACKAGE/ORDER I FOR ATIO
ABSOLUTE AXI U RATI GS
(Note 1)
ORDER PART
V , V , V , V .............................................. 0.3V to 6V
CC OUT M OS
NUMBER
RF Voltage ...................................(V 1.5V) to 6.5V
TOP VIEW
IN CC
RF Power (RMS) .............................................. 12dBm
IN
LTC5535ES6
RF 1 6 V
IN CC
I .................................................................... 25mA
VOUT GND 2 5 V
OUT
Operating Temperature Range (Note 2) .. 40C to 85C
V 3 4 V
OS M
Maximum Junction Temperature ......................... 125C
S6 PART
S6 PACKAGE
Storage Temperature Range ................ 65C to 150C 6-LEAD PLASTIC TSOT-23
MARKING
T = 125C, = 250C/W
Lead Temperature (Soldering, 10 sec).................. 300C JMAX JA
LBHK
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T = 25C. V = 3.6V, RF Input Signal is Off, R = R = 500, V = 0V unless
A CC A B OS
otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
V Operating Voltage 2.7 5.5 V
CC
I Operating Current I = 0mA 2 3.5 mA
VCC VOUT
V V (No RF Input) 150 180 to 220 250 mV
OUT OL
V Output Current V = 1.75V, V = 2.7V to 5.5V, V < 10mV 10 20 mA
OUT OUT CC OUT
V Bandwidth C = 33pF, R = 2k, P = 10dBm (Note 4) 12 MHz
OUT LOAD LOAD IN
V Load Capacitance (Note 6) 33 pF
OUT
V Slew Rate V = 1V Step, C = 33pF (Note 3) 50 V/s
OUT RFIN LOAD
V Noise V = 3V, Noise BW = 1.5MHz, 50 RF Input Termination, 1 mV
OUT CC P-P
50 AC Output Termination
V Voltage Range 01 V
OS
V Input Current V = 1V 0.5 0.5 A
OS OS
V Voltage Range 0V -1. 8 V
M CC
V Input Current V = 3.6V 0.5 0.5 A
M M
RF Input Frequency Range 600 to 7000 MHz
IN
RF Input Power Range RF Frequency = 300MHz to 7GHz (Note 5, 6) V = 2.7V to 6V 32 to 10 dBm
IN CC
RF AC Input Resistance F = 1000MHz, Pin = 25dBm 220
IN
RF Input Shunt Capacitance F = 1000MHz, Pin = 25dBm 0.65 pF
IN
Note 1: Absolute Maximum Ratings are those values beyond which the life Note 3: The rise time at V is measured between 1.3V and 2.3V.
OUT
of a device may be impaired.
Note 4: See Table 1 in Applications Information section.
Note 2: Specifications over the 40C to 85C operating temperature
Note 5: RF performance is tested at 1800MHz
range are assured by design, characterization and correlation with
Note 6: Guaranteed by design.
statistical process controls.
5535f
2
U WWW