Microcyber HT1200M, Руководство пользователя

Страница: 17 / 19

http://www.microcyber-fieldbus.com
HART Modem ASIC | HT1200M | Page
Email | fang.siqi@microcyber.cn
18
AC CHARACTERISTICS
(VDD = 2.7V to 5.5V, VSS = 0V, TA = -40C to +85C)
Pin
Name
Description Min. Typical Max. Units
IRXA Receive Analog Input
Leakage Current
Frequency-Mark(Logic 1)
Frequency-Space(Logic 0)
1190
2180 1200
2200
+/-150
1210
2220
nA
Hz
Hz
ORXAF Output of the High-pass Filter
Slew Rate
Gain Bandwidth (GBW)
Voltage Range
150
0.15
0.025
VDD-0.15
V/µs
kHz
V/µs
IRXAC Carrier Detect & Receive Filter Input
Leakage Current +/-500 nA
OTXA Modulator Output
Frequency-Mark(Logic1)
Frequency-Space(Logic0)
Amplitude(IAREF1.235V)
Slop
30
1196.9
2194.3
500
2.84
Hz
Hz
mV p-p
mV/µs
kΩ Loading(IAREF=1.235V)
ORXD Receive Digital Output
20
ns
Rise/Fall Time
OCD Carrier Detect Output
20
ns
Rise/Fall Time
MODEM CHARACTERISTIC
(VDD = 2.7V to 5.5V, VSS = OV, TA = -40 C to +85 C)
Parameter Min. Typical Max. Units
Demodulater Jitter
Conditions
1.
Input frequencies at
/-10Hz
，
/-20Hz
2.
Clock frequency of
460.8kHz+/-0.1%
12 % of 1 bit
3.Input(HLXA) asymmetry
，
0