MT88E45B Просмотр технического описания (PDF) - Zarlink Semiconductor Inc
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MT88E45B Datasheet PDF : 28 Pages
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Data Sheet
MT88E45B
AC Electrical Characteristics† - FSK Demodulation
Characteristics
Sym
Min
1 Accept Signal Level Range
-40
-37.78
10.0
Typ‡
2 Bell 202 Format Reject Signal Level
3 Transmission Rate
4 Mark and Space Frequencies
Bell 202 1 (Mark)
Bell 202 0 (Space)
1188 1200
1188 1200
2178 2200
Max
-6.45
-4.23
476
-48.24
-50.46
3
1212
1212
2222
Units
dBV
dBm
mVrms
dBm
dBV
mVrms
baud
Notes*
1, 2, 4, 5
1, 2, 4, 5
Hz
Hz
CCITT V.23 1 (Mark)
CCITT V.23 0 (Space)
1280.5 1300 1319.5
Hz
2068.5 2100 2131.5
Hz
5 Twist: 20 log (VMARK/VSPACE)
-6
+10
dB
6 Signal to Noise Ratio
SNRFSK
20
dB 1,3
† AC Electrical Characteristics are over recommended operating conditions, unless otherwise stated.
‡ Typical figures are nominal values and are for design aid only: not guaranteed and not subject to production testing.
*Notes:
1. Both mark and space have the same amplitude.
2. Tip/Ring signal level. Input op-amp configured to 0dB gain at Vdd=5V+/-10%, -3.5dB at Vdd=3V+/-10%.
3. Band limited random noise (200-3400Hz). Present when FSK signal is present. Note that the BT band is 300-3400Hz, the Bellcore
band is 0-4kHz.
4. dBV - Decibels above or below a reference voltage of 1 Vrms. 0 dBV = 1 Vrms.
5. dBm - Decibels above or below a reference power of 1 mW into 600 ohms. 0 dBm = 0.7746 Vrms.
Electrical Characteristics† - Gain Setting Amplifiers
Characteristics
Sym Min Max Units
Test Conditions
1 Input Leakage Current
2 Input Resistance
3 Input Offset Voltage
4 Power Supply Rejection Ratio
IIN
1
µA
Rin
10
MΩ
VOS
25
mV
PSRR 30
dB
5 Common Mode Rejection Ratio
CMRR 40
dB
6 DC Open Loop Voltage Gain
AVOL
40
dB
7 Unity Gain Bandwidth
fC
0.3
MHz
8 Output Voltage Swing
VO
0.5 VDD-0.5
V
9 Capacitive Load (GS1,GS2)
CL
50
pF
10 Resistive Load (GS1,GS2)
RL
100
kΩ
11 Common Mode Range Voltage
VCM
1.0 VDD-1.0
V
† Electrical characteristics are over recommended operating conditions, unless otherwise stated.
VSS ≤ VIN ≤ VDD
1kHz ripple on VDD
VCMmin ≤ VIN ≤ VCMmax
Load ≥ 100kΩ
17
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