Marine VHF Audio and Signalling Processor
CMX885
9.1.3 Operating Characteristics
For the following conditions unless otherwise specified:
External components as recommended in Figure 2.
Maximum load on digital outputs = 30pF.
Xtal Frequency = 3.6864MHz ±0.01% (100ppm); Tamb = −40°C to +85°C.
AVDD = DVDD = 3.0V to 3.6V.
Reference Signal Level = 308mV rms at 1kHz with AVDD = 3.3V.
Signal levels track with supply voltage, so scale accordingly.
Signal to Noise Ratio (SNR) in bit rate bandwidth.
Input stage gain = 0dB. Output stage attenuation = 0dB.
DC Parameters
Notes
Min.
Typ.
Max.
Unit
21
Supply Current
All Powersaved
DIDD (DVDD = 3.3V, VDEC = 2.5V)
AIDD (AVDD = 3.3V)
–
–
8
4
100
20
µA
µA
22
22
Idle Mode
DIDD (DVDD = 3.3V, VDEC = 2.5V)
AIDD (AVDD = 3.3V)
Rx Mode
–
–
1.12
50
–
–
mA
µA
DIDD (DVDD = 3.3V, VDEC = 2.5V)
AIDD (AVDD = 3.3V)
–
–
5.00
3.20
–
–
mA
mA
22
24
Tx Mode
DIDD (DVDD = 3.3V, VDEC = 2.5V)
AIDD (AVDD = 3.3V)
–
–
5.75
3.20
–
–
mA
mA
Additional current for Auxiliary ADC
DIDD (DVDD = 3.3V, VDEC = 2.5V)
Additional current for each Auxiliary DAC
AIDD (AVDD = 3.3V)
–
–
50
–
–
µA
µA
200
21 Tamb = 25°C. Not including any current drawn from the device pins by external
circuitry.
Notes:
22 Auxiliary circuits disabled, Bias enabled.
24 Single MOD output enabled.
© 2010 CML Microsystems Plc
60
D/885/3
CMLMICRO [ CML MICROCIRCUITS ]
