AD8313ARMZ-REEL Analog Devices Inc, AD8313ARMZ-REEL Datasheet - Page 12

USOIC 0.1 TO 2.4GHz Power Detector

AD8313ARMZ-REEL

Manufacturer Part Number
AD8313ARMZ-REEL
Description
USOIC 0.1 TO 2.4GHz Power Detector
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD8313ARMZ-REEL

Frequency
100MHz ~ 2.5GHz
Rf Type
RADAR, 802.11/Wi-Fi, 8.2.16/WiMax, Wireless LAN
Input Range
-65dBm ~ 0dBm
Accuracy
±1dB
Voltage - Supply
2.7 V ~ 5.5 V
Current - Supply
13.7mA
Package / Case
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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AD8313
With Pins 7 and 8 connected (log amp mode), the output can be
stated as
where P
directly terminated in 50 Ω. However, the input impedance of
the AD8313 is much higher than 50 Ω, and the sensitivity of this
device may be increased by about 12 dB by using some type of
matching network (see below), which adds a voltage gain and
lowers the intercept by the same amount. Dependence on the ref-
erence impedance can be avoided by restating the expression as
where V
across Pins 2 and 3; here, 2.2 µV corresponds to the intercept,
expressed in voltage terms. For detailed information on the
effect of signal waveform and metrics on the intercept
positioning for a log amp, refer to the AD8307 data sheet.
V
V
OUT
OUT
IN
IN
is the input power stated in dBm when the source is
=
=
is the rms value of a sinusoidal input appearing
V
20
SLOPE
×
V
SLOPE
(
P
IN
×
+
log
100
×
dBm
(
V
IN
)
2 /
2 .
µ
V
)
Rev. D | Page 12 of 24
With Pins 7 and 8 disconnected (controller mode), the output
can be stated as
when the input is stated in terms of the power of a sinusoidal
signal across a net termination impedance of 50 Ω. The transition
zone between high and low states is very narrow since the output
stage behaves essentially as a fast integrator. The above equations
can be restated as
Another use of the separate VOUT and VSET pins is in raising
the load-driving current capability by including an external
NPN emitter follower. More complete information about usage
in these modes is provided in the Applications section.
V
V
V
V
OUT
OUT
OUT
OUT
V
0
V
0
S
S
when
when
when
when
V
V
SLOPE
V
SLOPE
V
SLOPE
SLOPE
log
log
log
log
(
(
V
V
IN
IN
(
(
P
P
2 /
IN
2 /
IN
2 .
2 .
/
/
100
µ
µ
100
) V
) V
)
)
<
>
<
>
V
V
V
V
SET
SET
SET
SET

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