FX629 Datasheet, PDF (8/10 Pages) CML Microcircuits – Delta Modulation Codec

Specifications
Absolute Maximum Ratings
Exceeding the maximum rating can result in device damage. Operation of the device outside the operating limits is
not implied.
Supply voltage
Input voltage at any pin (ref V_SS = 0V)
Source/sink current (supply pins)
(other pins)
Total device dissipation @ 25°C
Derating
Operating temperature range: FX629J
-0.3 to 7.0V
-0.3 to (V_DD + 0.3V)
± 30mA
± 20mA
800mW Max.
10mW/°C
-40°C to +85°C
Storage temperature range: FX629J
-55°C to +125°C
Operating Limits
All characteristics are measured using the following parameters unless otherwise specified:
V_DD = 5.0V, T_AMB = 25°C, Xtal/Clock f₀ = 1.024MHz, Audio Level 0dB ref (0dBm0) = 489 mV rms.
Audio Test Frequency = 800 Hz. Sample Clock Rate = 32kb/s. Compand Algorithm = 3-bit.
Characteristics
See Note
Static Values
Supply Voltage
1
Supply Current (Enabled)
Supply Current (Powersave)
Inputs Logic '1'
8
Inputs Logic '0'
8
Outputs Logic '1'
8
Outputs Logic '0'
8
Digital Input Impedance
(Logic I/O pins)
Digital Input Impedance
(Logic input pins, pullup resistor)
2
Digital Output Impedance
Analogue Input Impedance
4
Analogue Output Impedance
7
Three State Output Leakage
Current (output disabled)
Insertion Loss
3
Dynamic Values
1,9
Encoder:
Analogue Signal Input Levels
5,9
Principle Integrator Frequency
Encoder Passband
Compand Time Constant
Decoder:
Analogue Signal Output Levels
5,9
Decoder Passband
Encoder Decoder (Full codec):
Compression Ratio (Cd = 0.3 to Cd = 0.0)
Passband
Stopband
Stopband Attenuation (4200Hz to 6000Hz)
(> 6kHz)
Passband Gain
Passband Ripple (300Hz –1400Hz)
(1400Hz – 2600Hz)
(2600Hz – 3400Hz)
Output Noise (Input short circuit)
9
Perfect Idle Channel Noise (Encoder forced) 9
Group Delay Distortion
6
(1000Hz to 2600Hz)
(600Hz to 2800Hz)
(500Hz to 3000Hz)
Xtal/Clock Frequency
Min.
4.5
–
–
3.5
–
4.0
–
1.0
300
–
–
–
-4.0
-2.0
-35.0
127
4.0
-35.0
300
–
300
4.2
25.0
–
–
-1.0
-1.0
-2.0
–
–
–
–
–
–
Typ.
5.0
5.5
0.4
–
–
–
–
10.0
–
–
1.0
–
–
–
–
159
3400
5.0
–
–
16:1
–
–
–
60.0
0
–
–
–
-55.0
-57.0
–
–
–
1024
Max.
5.5
–
–
–
1.5
–
1.0
–
–
4
–
800
+4.0
+2.0
+12.0
212
6.0
+12.0
3400
–
3400
–
–
–
–
+1.0
+3.0
+3.0
–
–
450
750
1.5
–
Unit
V
mA
mA
V
V
V
V
MΩ
kΩ
kΩ
kΩ
Ω
µA
dB
dBm0
Hz
Hz
ms
dBm0
Hz
Hz
kHz
dB
dB
dB
dB
dB
dB
dBm0
dBm0
µs
µs
ms
kHz
8