CMX138 CML Microcircuits, CMX138 Datasheet - Page 62

• Manufacturer Part Number: CMX138
• Description: Audio Scrambler and Sub-Audio Signalling Processor
• Manufacturer: CML Microcircuits

Audio Scrambler and Sub-Audio Signalling Processor
11.1.3 Operating Characteristics
For the following conditions unless otherwise specified:
© 2008 CML Microsystems Plc
Notes:
DC Parameters
Supply Current
All Powersaved
IDLE Mode
Rx Mode
Tx Mode
Additional current for Auxiliary
System Clock (output running at 4MHz)
Additional current for Auxiliary ADC
Additional current for Auxiliary DAC
AI
(AV
AI
AI
(AV
AI
AI
(AV
AI
AI
(AV
AI
DI
AI
DI
AI
DI
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
External components as recommended in Figure 2.
Maximum load on digital outputs = 30pF.
Xtal Frequency = 6.144MHz ±0.01% (100ppm); Tamb = −40°C to +85°C.
AV
Reference Signal Level = 308mV rms at 1kHz with AV
Signal levels track with supply voltage, so scale accordingly.
Input stage gain = 0dB. Output stage attenuation = 0dB.
+ DI
only (AV
+ DI
only (AV
+ DI
only (AV
+ DI
only (AV
(AV
(AV
(DV
(DV
(DV
21
22
= 3.3V, DV
= 3.3V, DV
= 3.3V, DV
= 3.3V, DV
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
Tamb = 25°C, not including any current drawn from the device pins by external circuitry.
System Clocks, Auxiliary circuits, audio
disabled, but all other digital circuits (including the Main Clock PLL) enabled. A single
analogue path is enabled through the device.
= DV
= 3.3V)
= 3.3V)
= 3.3V, V
= 3.3V, V
= 3.3V, V
DD
DD
DD
DD
DD
= 3.3V)
= 3.3V)
= 3.3V)
= 3.3V)
DD
DD
DD
DD
= 3.0V to 3.6V.
= 3.3V, V
= 3.3V, V
= 3.3V, V
= 3.3V, V
DEC
DEC
DEC
= 2.5V)
= 2.5V)
= 2.5V)
DEC
DEC
DEC
DEC
= 2.5V)
= 2.5V)
= 2.5V)
= 2.5V)
Page 62
Notes
scrambler,
21
22
22
22
DD
Min.
compander and pre/de-emphasis
–
–
–
–
–
–
–
–
–
–
–
–
–
= 3.3V.
Typ.
350
290
215
1.0
7.0
3.2
8.5
3.3
35
35
20
4
4
Max.
120
–
–
–
–
–
–
–
–
–
–
–
–
D/138_FI1.0/5
CMX138
Unit
mA
mA
mA
mA
mA
µA
µA
µA
µA
µA
µA
µA
µA