Cirrus Logic CS4399, Руководство пользователя

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14 DS1113F1
CS4399
3 Characteristics and Specifications
Fast Roll-Off
( FILTER_SLOW_FASTB = 0)
Quad-Speed Mode 1
Passband 2 to –0.01-dB corner
to –3-dB corner
attenuation @ Fs/2
0
0
9.44
—
—
— 0.114
0.46
—
Fs
Fs
dB
Passband ripple 10 Hz to –0.01-dB corner –0.01 — 0.01 dB
Stopband 0.583 — — Fs
Stopband attenuation 6 80 — — dB
Group delay (linear phase) PHCOMB_LOWLATB = 1 — 20.7/Fs — s
Group delay (minimum phase) PHCOMB_LOWLATB = 0 — 11.3/Fs — s
Slow Roll-Off
( FILTER_SLOW_FASTB = 1)
Single-Speed Mode 1
Passband 2 to –0.01-dB corner
to –3-dB corner
attenuation @ Fs/2
0
0
6.45 11
—
—
— 0.417
0.49
—
Fs
Fs
dB
Passband ripple 10 Hz to –0.01-dB corner
5
–0.01 — +0.01 dB
Stopband 0.583 — — Fs
Stopband attenuation 6 64 — — dB
Group delay (linear phase) PHCOMB_LOWLATB = 1 — 34.5/Fs
12
— s
Group delay (minimum phase) PHCOMB_LOWLATB = 0 — 5.6/Fs 13 — s
Deemphasis error 10
(Relative to 1 kHz)
Fs = 44.1 kHz — — ±0.14 dB
Slow Roll-Off
( FILTER_SLOW_FASTB = 1)
Double-Speed Mode 1
Passband
2
to –0.01-dB corner
to –3-dB corner
attenuation @ Fs/2
0
0
7 —
—
— 0.208
0.458
—
Fs
Fs
dB
Passband ripple 10 Hz to –0.01-dB corner –0.01 — 0.01 dB
Stopband 0.792 — — Fs
Stopband attenuation 6 70 — — dB
Group delay (linear phase) PHCOMB_LOWLATB = 1 — 22.3/Fs — s
Group delay (minimum phase) PHCOMB_LOWLATB = 0 — 6.7/Fs — s
Slow Roll-Off
( FILTER_SLOW_FASTB = 1)
Quad-Speed Mode 1
Passband
2
to –0.01-dB corner
to –3-dB corner
attenuation @ Fs/2
0
0
7.00
—
—
— 0.104
0.43
—
Fs
Fs
dB
Passband ripple 10 Hz to –0.01-dB corner –0.01 — 0.01 dB
Stopband 0.792 — — Fs
Stopband attenuation 6 75 — — dB
Group delay (linear phase) PHCOMB_LOWLATB = 1 — 20.7/Fs — s
Group delay (minimum phase) PHCOMB_LOWLATB = 0 — 10.6/Fs — s
Nonoversampling (NOS)
( NOS = 1)
Single-Speed Mode 1
Passband
2
to –0.01-dB corner
to –3-dB corner
0
0 —
— 0.026
0.444 Fs
Fs
Passband droop 10 Hz to 20 kHz — — 3.2 14 dB
Group delay — 2.7/Fs — s
Nonoversampling (NOS)
( NOS = 1)
Double-Speed Mode 1
Passband
2
to –0.01-dB corner
to –3-dB corner
0
0 —
— 0.0246
0.446
Fs
Fs
Passband droop 10 Hz to 20 kHz — — 0.73 dB
Group delay — 4.5/Fs — s
Nonoversampling (NOS)
( NOS = 1)
Quad-Speed Mode 1
Passband
2
to –0.01-dB corner
to –3-dB corner
0
0 —
— 0.026
0.405 Fs
Fs
Passband droop 10 Hz to 20 kHz — — 0.167 dB
Group delay — 8.4/Fs — s
Octuple-Speed Mode
1
Passband
2
to –0.01-dB corner
to –3-dB corner
0
0 —
— 0.0299
0.302
Fs
Fs
Passband droop 10 Hz to 20 kHz — — 0.037 dB
Group delay — 17/Fs — s
1. Filter response is by design.
2. Response is clock-dependent and scales with Fs.
3. 8.5 dB for 32-kHz sample rate.
4. 0.454 Fs for 32-kHz sample rate.
5. Filter ripple specification is invalid with deemphasis enabled.
Table 3-5. Combined DAC Digital, On-Chip Analog and AOUTx Filter Characteristics (Cont.)
Test conditions (unless specified otherwise): The filter characteristics have been normalized to the sample rate (Fs) and can be referenced to the desired
sample rate by multiplying the given characteristic by Fs. Single-Speed Mode refers to 32-, 44.1-, and 48-kHz sample rates. Double-Speed Mode refers
to 88.2- and 96-kHz sample rates. Quad-Speed Mode refers to 176.4- and 192-kHz sample rates. Octuple-Speed Mode refers to 352.8- and 384-kHz
sample rates. MCLK_INT is an integer multiple of Fs; HPF disabled; no DC offset applied; group delay does not include serial port delay.
Parameter
Minimum Typical Maximum Units