ATA3742_07 ATMEL [ATMEL Corporation], ATA3742_07 Datasheet - Page 8

• Manufacturer Part Number: ATA3742_07
• Description: UHF ASK/FSK Receiver
• Manufacturer: ATMEL [ATMEL Corporation]

8
ATA3742
Figure 4-1.
Figure 4-2.
If R
is defined by the value of R
input. The reduced sensitivity is dependent on the signal strength at the output of the RSSI
amplifier.
Since different RF input networks may exhibit slightly different values for the LNA gain, the sen-
sitivity values given in the electrical characteristics refer to a specific input matching. This
matching is illustrated in
Sense
is connected to V
Temperature Compensation of V
RSSI Characteristic
50 k
I ~ Ig(V
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
Figure 3-3 on page 6
-110
S
, the receiver operates at a lower sensitivity. The reduced sensitivity
Sense
LNA_IN
105 C
-40 C
25 C
, the maximum sensitivity by the signal-to-noise ratio of the LNA
I
)
ATA3742
-100
-90
RSSI
and exhibits the best possible sensitivity.
P
RSSI
V
REF
RSSI
-80
(dBm)
max
180 k
47 k
-70
B
min
V
min
= 60
RSSI_temp_comp.
-60
-50
4900B–RKE–11/07