Atmel ATA3741 Series, Operating

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25
4899B–RKE–10/06
ATA3741
Time frame
of a bit
(
Figure 5-14 )
t6 1060 1044 512
×
T
Clk
µs
Programming
pulse
(
Figure 5-11 ,
Figure 5-14 )
t7 133 529 131 521 64
×
T
Clk
256
×
T
Clk
µs
Equivalent
acknowledge
pulse: E_Ack
(
Figure 5-14 )
t8 265 261 128
×
T
Clk
µs
Equivalent
time window
(
Figure 5-14 )
t9 534 526 258
×
T
Clk
µs
OFF bit
programming
window
(
Figure 5-11 )
t10 930 916 449.5
×
T
Clk
µs
8. Electrical Characteristics (Continued)
All parameters refer to GND, T
amb
= –40°C to +105°C, V
S
= 4.5V to 5.5V, f
0
= 433.92 MHz and f
0
= 315 MHz, unless otherwise specified.
(V
S
= 5V, T
amb
= 25°C)
Parameter Test Condition Symbol
6.76438-Mhz Oscillator
(Mode 1)
4.90625-Mhz Oscillator
(Mode 0) Variable Oscillator
Unit Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
9. Electrical Characteristics
All parameters refer to GND, T
amb
= –40°C to +105°C, V
S
= 4.5V to 5.5V, f
0
= 433.92 MHz and f
0
= 315 MHz, unless otherwise specified.
(V
S
= 5V, T
amb
= 25°C)
Parameters Test Conditions Symbol Min. Typ. Max. Unit
Current consumption
Sleep mode
(XTO and polling logic active)
IS
off
190 350 µA
IC active
(start-up, bit-check, receiving mode)
pin DATA = H
IS
on
7.0 8.6 mA
LNA Mixer
Third-order intercept point
LNA/mixer/IF amplifier input matched
according to
Figure 3-3 on page 6
IIP3 –28 dBm
LO spurious emission at RF
In
Input matched according to Figure
3-3 , required according to
I-ETS 300220
IS
LORF
–73 –57 dBm
Noise figure LNA and mixer (DSB)
Input matching according to Figure
3-3
NF 7 dB
LNA_IN input impedance
At 433.92 MHz
At 315 MHz
Zi
LNA_IN
1.0 || 1.56
1.3 || 1.0
k
Ω
|| pF
k
Ω
|| pF
1 dB compression point (LNA, mixer,
IF amplifier) Input matched according to Figure
3-3 , referred to RF
in
IP
1db
–40 dBm
Maximum input level
Input matched according to Figure
3-3 ,
BER
≤
10
–3
,
ASK mode
P
in_max
–28
–20 dBm
dBm