11
4598H–AUTO–03/07
ATA5283
3 Automatic Gain Control
3.1 Preamble detection time VIN ≥ 3mV
rms at
125kHz tDAGC 192 Periods B
3.2 AGC adjustment time
f = 125 kHz
VIN = 1 mVrms
VIN = 3 mVrms
VIN = 30 mVrms
VIN = 100 mVrms
VIN = 1Vrms
tAGC
tAGC
tAGC
tAGC
tAGC
0
48
220
292
450 512
Periods C
3.3 Signal change rate
(gap detection)
Coil input signal 100%
to 37% (τ)1t
EOS 20 Periods C
3.4 AGC correction time
(no gap detection)
Coil input signal:
50 to 100% changing 1t
CORR 52 Periods C
Coil input signal:
100 to 50% changing 1t
CORR 208 Periods C
3.5 Data rate (Q < 20) 125 kHz ASK DR 4 Kb/s A
3.6 Delay time RF signal to data 125kHz ASK tON 40 µs A
3.7 Delay time RF signal to data 125kHz ASK tOFF 40 µs A
4 Interface
4.1 Reset input level high 5 VHRESET 0.8 ×
VDD VDD VA
4.1.1 Reset pulse width VRESET = VDD 5t
RESET 20 µs A
4.2 Reset input level low 5 VLRESET 00.2 ×
VDD VC
4.3 Reset input leakage current
low VRESET = VSS 5I
IL -0.2 0 µA A
4.4 Reset input leakage current
high VRESET = VDD 5I
IH 00.2µAA
4.5 N_WAKEUP output level high INWAKEUP = –100µA 7 VHNWAKE 0.8 ×
VDD VDD VA
4.6 N_WAKEUP output level low INWAKEUP = 100µA 7 VLNWAKE 00.2 × VDD VA
4.7 N_DATA output level high IN_DATA = –100 µA 6 VHNDATA 0.8 ×
VDD VDD VA
4.8 N_DATA output level low IN_DATA = 100µA 6 VLNDATA 00.2 × VDD VA
5 Power Supply and Reset
5.1 VDD power on reset threshold VPOR 11.51.9 V A
5.2 Power-up time Switch on VDD to circuit
active tPON 100 ms C
5.2.1 Standby reactivation delay
after pulse reset f = 125 kHz TSbydel 800 µs C
5.3 RESET reactivation caused by
negative spikes on VDD tBDN = 500ns 7 tRS T 10 200 µs C
7. Electrical Characteristics (Continued)VSS = 0V, VDD = 2V to 3.8V, Tamb = –40°C to +105°C, characterized up to 125°C, unless other specified
No. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type*
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter