
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
Typical Operating Characteristics (continued)
(Typical Application Circuit (Figure 1), V S = V CC = 3.3V, P IN = -10dBm, f IN = 100MHz, R1 = 0 Ω , R4 = 0 Ω , R L = 10k Ω , V PWDN = 0V,
TA = +25°C, unless otherwise noted.)
OUTPUT VOLTAGE vs. FREQUENCY
RF PULSE RESPONSE
2.0
1.8
1.6
P IN = -10dBm
V CC = 3.6V
2.5
2.0
1.5
f IN = 100MHz
V OUT
1.4
1.2
P IN = -30dBm
V CC = 2.7V
1.0
RFIN
(AC-COUPLED)
1.0
0.5
0.8
0.6
0.4
P IN = -45dBm
P IN = -60dBm
V CC = 2.7V, 3.3V, 3.6V
0
-0.5
-1.0
0
200
400 600 800
1000
TIME (50ns/div)
FREQUENCY INPUT (MHz)
-10.0
-12.5
S11 MAGNITUDE
-10.0
-12.5
S11 MAGNITUDE
-15.0
-15.0
T A = -20 ° C
T A = -40 ° C
V CC = 2.7V, 3.0V, 3.3V, 3.6V
-17.5
-20.0
-17.5
-20.0
-22.5
-22.5
T A = +85 ° C
T A = +25 ° C
-25.0
0
200
400 600
800
1000
-25.0
0
200
400 600
800
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
Pin Description
PIN
1, 4
NAME
V CC
DESCRIPTION
Supply Voltage. Bypass with capacitors as specified in the typical application circuits. Place capacitors
as close to the pin as possible (see the Power-Supply Connections section).
2, 3
INHI, INLO Differential RF Inputs
8
5
6
7
8
—
PWDN
GND
SET
OUT
EP
Power-Down Input. Drive PWDN with a logic-high to power down the IC. PWDN must be connected to
GND for V S between 4.75V and 5.25V with R4 = 75 Ω .
Ground. Connect to the printed circuit (PC) board ground plane.
Set-Point Input. To operate in detector mode, connect SET to OUT. To operate in controller mode,
connect a precision voltage source to control the power level of a power amplifier.
Detector Output. In detector mode, this output provides a voltage proportional to the log of the input
power. In controller mode, this output is connected to a power-control input on a power amplifier (PA).
Exposed Pad (TDFN Package Only). Connect EP to GND using multiple vias, or the EP can also be left
unconnected.