ATA8404_14 Datasheet, PDF (15/18 Pages) ATMEL Corporation – UHF ASK/FSK Transmitter

7. Electrical Characteristics (Continued)
V_S = 3.0V and T_amb = 25°C. All parameters are referred to GND (pin 9).
C_M = 4.37fF, C₀ = 1.3pF, C_LNOM = 18pF, C₄ = 10pF, C₅ = 15pF and R_S ≤ 60Ω
Parameters
Test Conditions
Clock output frequency (CMOS
microcontroller compatible)
Atmel ATA8404
Atmel ATA8405
Clock output minimum High and C_Load ≤ 20pF, High = 0.8 × Vs,
Low time
Low = 0.2 × V_S, f_CLK < 1.7MHz
Series resonance resistance of the For proper detection of the XTO
resonator seen from pin XTO1 amplitude
Capacitive load at Pin XTO1
FSK modulation frequency rate
This corresponds to 20kBaud in
Manchester coding and 40kBaud in
NRZ coding
FSK switch OFF resistance
High Z
FSK switch OFF capacitance
High Z capacitance
FSK switch ON resistance
Low Z
ASK modulation frequency rate
Duty cycle of the modulation signal =
50%, this corresponds to 20kBaud in
Manchester coding and 40kBaud in
NRZ coding
ASK input
Low level input voltage
High level input voltage
Input current high
FSK input
Low level input voltage
High level input voltage
Input current high
ENABLE input
Low level input voltage
High level input voltage
Input current high
Input current Low
Symbol
f_CLK
T_CLKLH
R_{s_max}
C_{L_max}
f_{MOD_FSK}
R_{SWIT_OFF}
C_{SWIT_OFF}
R_{SWIT_ON}
f_{MOD_ASK}
V_Il
V_Ih
I_In
V_Il
V_Ih
I_In
V_Il
V_Ih
I_Inh
I_Inl
Min.
125
0
50
0.75
0
1.7
1.7
1.7
–40
–40
Typ.
f₀/192
f₀/256
Max.
150
5
20
0.9
1.1
130
175
20
0.25
V_S
30
0.25
V_S
30
0.25
V_S
+40
+40
Unit
MHz
ns
Ω
pF
kHz
kΩ
pF
Ω
kHz
V
V
µA
V
V
µA
V
V
µA
µA
ATA8404/ATA8405 [DATASHEET]
15
9136G–AUTO–06/14