CMX981 Consumer Microcircuits Limited, CMX981 Datasheet - Page 55
CMX981
Manufacturer Part Number
CMX981
Description
Advanceddigital Radio Baseband Processor (tetra Etc.)
Manufacturer
Consumer Microcircuits Limited
Datasheet
1.CMX981.pdf
(66 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
CMX981Q1
Manufacturer:
CML
Quantity:
20 000
Advanced Digital Radio Baseband Processor
Receive Parameters
Input Impedance
Differential input voltage
Signal to noise
Signal to noise plus distortion
3
ADC sampling rate
ADC resolution
Integral accuracy
Differential accuracy
FIR filter sampling rate (Decimation section)
(RRC section)
Output rate (16 bit words per channel) - selectable
Offset (without adjustment)
Gain matching, I to Q (without adjustment, 0 - 10kHz)
Phase matching, I to Q (0 - 10kHz)
Storage time (with default coefficients)
With internal anti-alias filter disabled:
With internal anti-alias filter enabled:
TETRA Specific Parameters
RRC roll-off coefficient ( )
2002 CML Microsystems Plc
rd
(Capacitive load to V
(Source impedance should be < 1k
SCLK >= MCLK/2
SCLK = MCLK/4
External anti-alias requirements
External anti-alias requirements
|H(f)| 0 - 5.85kHz
|H(f)| at 9kHz
|H(f)| at 10.05kHz
|H(f)| at 12.15kHz
|H(f)| at 16kHz
|H(f)| >25kHz
order intercept
at MCLK/70
at MCLK/4
at MCLK/70
SS1
Parameter
or V
SS2
)
55
Notes
6, 7
1
2
2
3
4
5
5
5
8
-30.0
-70.0
-85.0
Min.
90.0
85.0
-0.2
-2.9
-6.5
100
MCLK/128
MCLK/64
MCLK/64
MCLK/4
MCLK/4
Typ.
95.0
90.0
0.35
200
-3.0
-6.9
1.7
10.0
16
0
Max.
-15.0
-110
+0.2
-3.1
-7.3
1.9
20.0
-13
10
17
0.1
0.5
1
1
Symbols
Degrees
V pk-pk
V pk-pk
CMX981
D/981/1
Units
LSB
LSB
Bits
mV
k
pF
dB
dB
Hz
Hz
Hz
Hz
Hz
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB