LTC5531ES6#PBF Linear Technology, LTC5531ES6#PBF Datasheet - Page 9

• Manufacturer Part Number: LTC5531ES6#PBF
• Description: IC, PRECISION RF DETECTOR, 7GHZ, SOT23-6
• Manufacturer: Linear Technology

Specifications of LTC5531ES6#PBF

• Frequency Range: 300MHz To 7GHz
• Power Range: -32dBm To 10dBm
• Supply Current: 500µA
• Supply Voltage Range: 2.7V To 6V
• Rf Ic Case Style: SOT-23
• No. Of Pins: 6
• Rf Type: General Purpose
• Pin Count: 6
• Screening Level: Industrial
• Package Type: TSOT-23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATIO S I FOR ATIO
Operation
The LTC5531 RF detector integrates several functions to
provide RF power detection over frequencies ranging from
300MHz to 7GHz. These functions include an internal fre-
quency compensated buffer amplifier, an RF Schottky di-
ode peak detector and level shift amplifier to convert the RF
input signal to DC and a delay circuit to avoid voltage tran-
sients at V
shutdown and voltage offset adjustment capabilities.
Buffer Amplifier
The output buffer amplifier is capable of supplying typi-
cally 4mA into a load. The amplifier has a bandwidth of
2MHz and a fixed internal gain of two.
The V
amplifier. V
output voltage is not to be changed. The buffer is initially
trimmed to approximately 120mV with V
ground.
The V
voltage. This function enables the LTC5531 output to span
OS
OS
input controls the DC input voltage to the buffer
pin is used to change the initial V
OUT
OS
when powering up. The LTC5531 has both
must be connected to ground if the DC
U
U
W
RF
SHDN
IN
V
CC
OS
R1
(OPT)
22k
connected to
OUT
39pF
C4
U
Demo Board Schematic
1
2
3
starting
LTC5531ES6
RF
GND
SHDN
IN
V
V
V
OUT
CC
OS
6
5
4
the input range of a variety of analog-to-digital converters.
V
voltage at V
present is:
RF Detector
The internal RF Schottky diode peak detector and level
shift amplifier converts the RF input signal to a low
frequency signal. The detector demonstrates excellent
efficiency and linearity over a wide range of input power.
The Schottky diode is biased at about 55 A and drives a
25pF internal peak detector capacitor.
Shutdown
The part is in shutdown mode when SHDN is low. The
supply current is reduced to < 2 A and V
ground via a 280 resistor. When SHDN is asserted high,
the part is enabled after about 8 s.
V
V
OUT
OS
OUT
V
OUT
C2
100pF
will not change until V
will exactly track V
= V
OS
OUT
C3
(OPT)
C1
0.1 F
V
2.7V TO 6V
V
CC
OUT
for V
5531 DB
OS
OS
120mV and with no RF signal
above 120mV.
OS
exceeds 120mV. The
LTC5531
OUT
is shorted to
9
5531f