Datasheet

MAX4000/MAX4001/MAX4002
2.5GHz 45dB RF-Detecting Controllers
12 ______________________________________________________________________________________
Pin Description
PIN
µMAX UCSP
NAME
FUNCTION
1 A1 RFIN RF Input
2A2
SHDN
Shutdown. Connect to V
CC
for normal operation.
3 A3 SET Set-Point Input for Controller Mode Operation
4 B3 CLPF
Lowpass Filter Connection. Connect external capacitor between CLPF and GND to set
control-loop bandwidth.
5 C3 GND Ground
6 — N.C. No Connection. Not internally connected.
7 C2 OUT Output to PA Gain-Control Pin
8
B1, C1
V
CC
Supply Voltage. V
CC
= 2.7V to 5.5V.
MAXIMUM OUT VOLTAGE
vs. V
CC
BY LOAD CURRENT
MAX4000 toc71
V
CC
(V)
OUT VOLTAGE (V)
5.04.54.03.53.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.0
2.5 5.5
10mA
5mA
0
MAIN OUTPUT NOISE SPECTRAL DENSITY
MAX4000 toc70
FREQUENCY (Hz)
NOISE SPECTRAL DENSITY (nV/√HZ)
1k 10k 100k 1M
10
1
100 10M
9
8
7
6
5
4
3
2
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.)
Block Diagram
BUFFER
GND
OUTPUT-
ENABLE
DELAY
LOG
DETECTOR
x1
V-I*
SHDN
V
CC
RFIN
SET
C
CLPF
OUT
MAX4000
MAX4001
MAX4002
g
m
BLOCK