max2016etit Maxim Integrated Products, Inc., max2016etit Datasheet - Page 10

• Manufacturer Part Number: max2016etit
• Description: Max2016 Lf-to-2.5ghz Dual Logarithmic Detector/controller For Power, Gain, And Vswr Measurements
• Manufacturer: Maxim Integrated Products, Inc.

LF-to-2.5GHz Dual Logarithmic Detector/
Controller for Power, Gain, and VSWR Measurements
The MAX2016 dual logarithmic amplifier is designed for
a multitude of applications including dual-channel RF
power measurements, AGC control, gain/loss detection,
and VSWR monitoring. This device measures RF signals
ranging from low frequency to 2.5GHz, and operates
from a single 2.7V to 5.25V (using series resistor, R6)
power supply. As with its single-channel counterpart
(MAX2015), the MAX2016 provides unparalleled perfor-
mance with a high 80dB dynamic range at 100MHz and
exceptional accuracy over the extended temperature
and supply voltage ranges.
The MAX2016 uses a pair of logarithmic amplifiers to
detect and compare the power levels of two RF input
signals. The device subtracts one power level from the
other to provide a DC output voltage that is proportional
10
2, 9, 12, 20
13, 14
18, 19
21, 22
1, 28
5, 17
______________________________________________________________________________________
PIN
3, 4
EP
10
11
15
16
23
24
25
26
27
6
7
8
RFINA+, RFINA-
RFINB-, RFINB+
FA1, FA2
FB1, FB2
FV2, FV1
COUTH
COUTL
CSETH
CSETL
NAME
OUTD
OUTB
OUTA
SETD
SETB
SETA
GND
GND
COR
V
REF
CC
Detailed Description
External Capacitor Input. Connecting a capacitor between FA1 and FA2 sets the highpass cutoff
frequency corner for detector A (see the Input Highpass Filter section).
Supply Voltage. Bypass with capacitors as specified in the Typical Application Circuit. Place
capacitors as close to each V
Differential RF Inputs for Detector A. Requires external DC-blocking capacitors.
Ground. Connect to the PCB ground plane.
High-Comparator Output
Threshold Input on High Comparator
Comparator OR Logic Output. Output of COUTH ORed with COUTL.
Set-Point Input for Gain Detector
DC Output Voltage Representing P
proportional to the difference of the input RF powers on RFINA and RFINB.
Video-Filter Capacitor Inputs for OUTD
Threshold Set Input on Low Comparator
Low-Comparator Output
Differential RF Inputs for Detector B. Requires external DC-blocking capacitors.
External Capacitor Input. Connecting a capacitor between FB1 and FB2 sets the highpass cutoff
frequency corner for detector B (see the Input Highpass Filter section).
Detector B Output. This output provides a voltage proportional to the log of the input power on
differential inputs RFINB+ and RFINB- (RFINB).
Set-Point Input for Detector B
2V Reference Output
Set-Point Input for Detector A
Detector A Output. This output provides a voltage proportional to the log of the input power on
differential inputs RFINA+ and RFINA- (RFINA).
Exposed Paddle. EP must connect to the PCB ground plane.
CC
as possible (see the Power-Supply Connections section).
to the power difference (gain). The MAX2016 can also
measure the return loss/VSWR of an RF signal by moni-
toring the incident and reflected power levels associat-
ed with any given load.
A window detector is easily implemented by using the
on-chip comparators, OR gate, and 2V reference. This
combination of circuitry provides an automatic indica-
tion of when the measured gain is outside a program-
mable range. Alarm monitoring can thus be imple-
mented for detecting high-VSWR states (such as open
or shorted loads).
The MAX2016 has two differential RF inputs. The input
to detector A (RFINA) uses the two input ports RFINA+
and RFINA-, and the input to detector B (RFINB) uses
the two input ports RFINB+ and RFINB-.
RFINA
- P
FUNCTION
RFINB
. This output provides a DC voltage
RF Inputs (RFINA and RFINB)
Pin Description