Cirrus Logic CS35L32 - Manual (Page 10)

10 DS963F4
CS35L32
3 Characteristics and Specifications
Table 3-6. Speaker Amplifier Output Characteristics
Test conditions, except where noted otherwise: VA = 1.8 V, VP = 3.6 V, VBST = 5.0 V, 1-kHz input, amp gain = 12 dB, GNDA = GNDP = 0 V, T
A
= +25°C,
measurement bandwidth is 20 Hz to 20 kHz, Fs = 48 kHz, MCLK
INT
= 6 MHz. MCLK
INT
is explained in Section 4.13.1 and Section 7.7 .
Parameters Symbol Test Conditions Min Typical Max Units
Continuous average power delivered to load 1
1.Power delivered to the speaker from the 0.1-  load side terminal (refer to Fig. 2-1 ).
Po 8-  load, THD 10%
8-  load, THD 1%
—
— 1.75
1.45 —
— W
W
THD+N THD+N 8-  load, 1.0 W — 0.02 — %
Input voltage @ 1% THD+N V
ICLIP
8-  load — 0.84 — Vrms
Signal to noise ratio SNR Referenced to output voltage @1% THD+N, A-weighted — 102 — dB
Idle channel noise ICN VBST = VP, A-weighted — 25 — Vrms
Common-mode rejection ratio CMRR V
ripple
= 1 V
PP
, f
ripple
= 217 Hz — 55 — dB
Frequency response FR 20 Hz to 20 kHz, No input DC blocking caps –0.1 0 0.1 dB
Efficiency 2
2.Efficiency collected using a 5-V external supply, as shown
in the drawing. For this test, the VBST pin should not be
connected to the SPKRSUPPLY pin.

A
8-  load 33 H, 1.7 W — 91 — %
Class D amplifier gain — AMP_GAIN = 000 (mute)
AMP_GAIN = 001
AMP_GAIN = 010
AMP_GAIN = 011
AMP_GAIN = 100
—
—
—
—
— –80
9
12
15
18
—
—
—
—
— dB
dB
dB
dB
dB
N-FET ON resistance R
DS ON,N
I
FET
= 0.5 A — 185 — m 
P-FET ON resistance R
DS ON,P
I
FET
= 0.5 A — 205 — m 
Output DC offset voltage V
OFFSET
Inputs AC coupled to ground — ±5 — mV
Time from shutdown to audio out t
SD RESET deasserted, zero-crossing disabled — 15 — ms
Generic Simulated
Speaker Load
R
SENSE
0.1 
Audio Precision AP 2700
Audio Analyzer
Audio Precision
AUX-0025 Filter
SPKOUT+
ISENSE+
SPKOUT–
ISENSE–/
VSENSE+
VSENSE–
SPKRSUPPLY
5 V
3.6 V
1.8 V
VP
VA
8 
33 H