VLSI
Solution
y
VS2000 PRELIMINARY
VS2000
3. CHARACTERISTICS & SPECIFICATIONS
3.3
Analog Characteristics of Audio Outputs
Unless otherwise noted: AVDD=2.8V, CVDD=2.5V, IOVDD=3.3V, TA=-40..+85◦C, XTALI=12 MHz,
Internal Clock Multiplier 4.0×. DAC tested with full-scale output sinewave, measurement bandwidth 20..20000 Hz,
analog output load: LEFT to CBUF 30Ω, RIGHT to CBUF 30Ω.
Parameter
Symbol
Min
Typ
Max
Unit
DAC Resolution
18
bits
Total Harmonic Distortion
THD
0.1
%
Dynamic Range (DAC unmuted, A-weighted)
IDR
94
dB
S/N Ratio (full scale signal, no load)
SNR
90
dB
Interchannel Isolation (Cross Talk)
50
75
dB
Interchannel Isolation (Cross Talk), with GBUF
40
dB
Interchannel Gain Mismatch
-0.5
0.5
dB
Frequency Response
-0.05
0.05
dB
Full Scale Output Voltage (Peak-to-peak)
1.3
1.5
1.7
Vpp
Deviation from Linear Phase
5
◦
Analog Output Load Resistance
AOLR
301
Ω
Analog Output Load Capacitance
1002
pF
CBUF disconnect current (short-circuit protection)
200
mA
1 AOLR may be lower than Typical, but distortion performance may be compromised. Also, there is a maximum
current that the internal regulators can provide.
2 CBUF must have external 10 Ω + 47 nF load, LEFT and RIGHT must have external 20 Ω + 10 nF load for stability.
3.4
Analog Characteristics of Regulators
Parameter
Symbol
Min
Typ
Max
Unit
Continuous current, IOVDD
50
mA
Continuous current, CVDD
50
mA
Continuous current, AVDD
100
mA
Dropout voltages, 30 mA
0.3
V
Line regulation, VHIGHmin . . . VHIGHmax
10
mV
Load regulation, 1 mA . . . 30 mA
100
mV
Absolute gain setting accuracy 1
-150
+150
mV
Gain step setting accuracy
-10
+10
%
1 Absolute level depends on RCAP voltage
3.5
Power Consumption
Parameter
Min
Typ
Max
Unit
Full operation in example application, Vbus = 5 V
75
mA
Version 0.3,
2007-09-05
5
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