U3741BM Datasheet, PDF (29/32 Pages) ATMEL Corporation – UHF ASK RECEIVER IC

U3741BM
Electrical Characteristics (Continued)
All parameters refer to GND, T_amb = -40°C to +105°C, V_S = 4.5 V to 5.5 V, f₀ = 433.92 MHz and f₀ = 315 MHz, unless otherwise specified.
(V_S = 5 V, T_amb = 25°C)
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Unit
Values relative to
R_Sense = 56 kΩ
Reduced sensitivity variation for
different values of R_Sense
Threshold voltage for reset
Digital Ports
Data output
- Saturation voltage LOW
- Internal pull-up resistor
- Maximum time constant
- Maximum capacitive load
POUT output
- Saturation voltage LOW
- Saturation voltage HIGH
FSK/ASK input
- Low-level input voltage
- High-level input voltage
ENABLE input
- Low-level input voltage
- High-level input voltage
MODE input
- Low-level input voltage
- High-level input voltage
TEST input
- Low-level input voltage
R_Sense = 56 kΩ
R_Sense = 68 kΩ
R_Sense = 82 kΩ
R_Sense = 100 kΩ
R_Sense = 120 kΩ
R_Sense = 150 kΩ
P_Red = P_{Ref_Red} + ∆P_Red
0
dB
∆P_Red
-3.5
-6.0
dB
dB
-9.0
dB
-11.0
dB
-13.5
dB
V_ThRESET
1.95
2.8
3.75
V
I_ol = 1 mA
t = C_L (R_pup//R_Ext)
without ext. pull-up resistor
R_ext = 5 kΩ
I_POUT = 1 mA
I_POUT = -1 mA
FSK selected
ASK selected
Idle mode
Active mode
Division factor = 10
Division factor = 14
Test input must always be set to LOW
V_OI
R_Pup
τ
C_L
C_L
0.08
0.3
V
39
50
61
kΩ
2.5
µs
41
pF
540
pF
V_Ol
0.08
0.3
V
V_Oh
V_S - 0.3 V V_S - 0.14V
V
V_Il
V_Ih
0.8 × V_S
0.2 × V_S
V
V
V_Il
V_Ih
0.8 × V_S
0.2 × V_S
V
V
V_Il
V_Ih
0.8 × V_S
V_Il
0.2 × V_S
V
V
0.2 × V_S
V
29
4662B–RKE–10/04