2.5GHz 45dB RF-Detecting Controllers
Typical Operating Characteristics (continued)
(V CC = 3V, SHDN = V CC , T A = +25°C, unless otherwise specified. All log conformance plots are normalized to their respective tem-
peratures.)
MAXIMUM OUT VOLTAGE
10
9
8
7
6
MAIN OUTPUT NOISE SPECTRAL DENSITY
5.5
5.0
vs. V CC BY LOAD CURRENT
0
5
4
3
2
1
4.5
4.0
3.5
3.0
2.5
2.0
5mA
10mA
100
1k
10k
100k
1M
10M
2.5
3.0
3.5
4.0
4.5
5.0
5.5
FREQUENCY (Hz)
V CC (V)
Pin Description
PIN
μMAX UCSP
NAME
FUNCTION
1
2
3
4
5
6
7
8
A1
A2
A3
B3
C3
C2
B1, C1
RFIN
SHDN
SET
CLPF
GND
N.C.
OUT
VCC
RF Input
Shutdown. Connect to VCC for normal operation.
Set-Point Input for Controller Mode Operation
Lowpass Filter Connection. Connect external capacitor between CLPF and GND to set
control-loop bandwidth.
Ground
No Connection. Not internally connected.
Output to PA Gain-Control Pin
Supply Voltage. VCC = 2.7V to 5.5V.
Block Diagram
SHDN
V CC
RFIN
LOG
DETECTOR
OUTPUT-
ENABLE
DELAY
g m
BLOCK
x1
OUT
SET
V-I*
MAX4000
BUFFER
C CLPF
MAX4001
MAX4002
GND
12
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