LTC5535 Datasheet, PDF (1/12 Pages) Linear Technology – Precision 600MHz to 7GHz, RF Detector with Adjustable Gain and 12MHz Baseband Bandwidth

LTC5535
Precision 600MHz to 7GHz,
RF Detector with
Adjustable Gain and
12MHz Baseband Bandwidth
FEATURES
■ _{Temperature Compensated Internal Schottky}
Diode RF Detector
■ _{Wide Input Frequency Range: 600MHz to 7GHz*}
■ _{Wide Input Power Range: –32dBm to 10dBm}
■ _{External Gain Control}
■ _{Precision VOUT Offset Control}
■ _{Low Starting Voltage: 200mV for Gain = 2}
■ _{Wide VCC Range of 2.7V to 5.5V}
■ _{Low Operating Current: 2mA}
■ _{Available in a Low Profile (1mm) SOT-23 Package}
U
APPLICATIO S
■ _{802.11a, 802.11b, 802.11g, 802.15, 802.16}
■ _{Multimode Mobile Phone Products}
■ _{Optical Data Links}
■ _{Wireless Data Modems}
■ _{Wireless and Cable Infrastructure}
■ _{RF Power Alarm}
■ _{Envelope Detector}
DESCRIPTIO
The LTC^®5535 is an RF power detector for RF applications
operating in the 600MHz to 7GHz range. A temperature
compensated Schottky diode peak detector and output
amplifier are combined in a small ThinSOT^TM package. The
supply voltage range is optimized for operation from a
single cell lithium-ion or three cell NiMH battery.
The RF input voltage is peak detected using an on-chip
Schottky diode. The detected voltage is buffered and
supplied to the V_OUT pin.
The LTC5535 output amplifier gain is set via external
resistors. The initial starting voltage of 200mV can be
precisely adjusted using the V_OS pin.
The LTC5535 operates with input power levels from
–32dBm to 10dBm. The 12MHz baseband bandwidth is
much higher than that of previous Schottky detector
products.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
*Higher frequency operation is achievable with reduced performance. Consult factory for more
information.
TYPICAL APPLICATIO
600MHz to 7GHz RF Power Detector
33pF
LTC5535
RF
INPUT
1
RF_IN
V_CC ⁶
2
GND
5
V_OUT
V_OS
REFERENCE
3
V_OS
4
V_M
5535 TA01
100pF
R_A
R_B
V_CC
0.1µF
Output Voltage vs RF Input Power
3600
3200
2800
V_CC = 3.6V
T_A = 25°C
GAIN = 2
V_OS = 0V
2400
2000
1600
1200
800
2GHz
600MHz
1GHz
5GHz
6GHz
7GHz
4GHz
400
0
–32 –28 –24 –20 –16 –12 –8 –4 0 4 8 12
RF INPUT POWER (dBm)
5535 TA02
5535f
1