Line output characteristics, Note 15), Gain) – Cirrus Logic CS42L56 User Manual
Page 19: Note 14), Note 16), Note 17), Cs42l56 line output characteristics
DS851F2
19
CS42L56
LINE OUTPUT CHARACTERISTICS
Test conditions (unless otherwise specified): Connections to the CS42L56 are shown in the
“Typical Connection Diagrams” on
; Input test signal is a full-scale 997 Hz sine wave; All Supplies = VA, VCP Mode; GND = AGND = 0 V; T
A
= +25
C;
Measurement bandwidth is 20 Hz to 20 kHz; Sample Frequency = 48 kHz; Test load R
L
= 10 k
C
L
= 150 pF (see
); Measurement signal path is SDIN to LINEOUTx.
Notes:
14. The analog gain setting (
“Headphone Volume Control” on page 84
) must be configured as indicated to achieve the specified output characteristics.
15. One LSB of triangular PDF dither is added to data.
16. VCP settings lower than VA reduces the headroom of the headphone amplifier. As a result, the speci-
fied THD+N performance at full-scale output voltage and power may not be achieved.
and
. Refer to
“Parameter Definitions” on page 91
.
18. Response is clock dependent and will scale with Fs. Note that the response plots (
to
) have been normalized to Fs and can be denormalized by multiplying the X-axis scale by Fs.
19. Measurement bandwidth is from Stopband to 3 Fs.
VA = 2.5 V
VA = 1.8 V
Parameter
Min
Typ
Max
Min
Typ
Max
Unit
(+2 dB Analog Gain)
Dynamic Range
18 to 24-Bit
A-weighted
unweighted
16-Bit
A-weighted
unweighted
93
90
-
-
99
96
96
94
-
-
-
-
91
88
-
-
97
94
94
92
-
-
-
-
dB
dB
dB
dB
Total Harmonic Distortion + Noise
18 to 24-Bit
0 dB
-20 dB
-60 dB
16-Bit
0 dB
-20 dB
-60 dB
-
-
-
-
-
-
-84
-76
-36
-82
-74
-34
-78
-
-30
-
-
-
-
-
-
-
-
-
-86
-74
-34
-84
-72
-32
-80
-
-28
-
-
-
dB
dB
dB
dB
dB
dB
Full-scale Output Voltage
1.50•VA 1.58•VA 1.71•VA 1.50•VA 1.58•VA 1.71•VA
V
PP
Other Characteristics
Interchannel Isolation
-
90
-
-
90
-
dB
Interchannel Gain Mismatch
-
0.1
0.32
-
0.1
0.32
dB
Output Offset
Mute
0 dB Analog Gain
-
-
0.5
3.6
1.0
±14.6
-
-
0.5
2.8
1.0
±10.6
mV
mV
Gain Drift
-
±100
-
-
±100
-
ppm/°C
Output Impedance
-
100
-
-
100
-
Load Resistance (R
L
)
10
-
-
10
-
-
k
Load Capacitance (C
L
)
-
-
150
-
-
150
pF