CS35L32 datasheet(10/51 Pages) CIRRUS

10 / 51 page

DS963F5

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, TA = +25°C,

measurement bandwidth is 20 Hz to 20 kHz, Fs = 48 kHz, MCLKINT = 6 MHz. MCLKINT 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).

 load, THD 10%

 load, THD 1%

—

1.75

1.45

—

THD+N

 load, 1.0 W —

0.02

—

Input voltage @ 1% THD+N

VICLIP

 load —

0.84

—

Vrms

Signal to noise ratio

SNR

Referenced to output voltage @1% THD+N, A-weighted —

102

—

Idle channel noise

ICN

VBST = VP, A-weighted —

—

Vrms

Common-mode rejection ratio

CMRR

Vripple = 1 VPP, fripple = 217 Hz —

—

Frequency response

20 Hz to 20 kHz, No input DC blocking caps –0.1

0.1

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

 load 33 H, 1.7 W —

—

Class D amplifier gain

—

AMP_GAIN = 000 (mute)

AMP_GAIN = 001

AMP_GAIN = 010

AMP_GAIN = 011

AMP_GAIN = 100

—

–80

—

N-FET ON resistance

RDS ON,N

IFET = 0.5 A —

185

—



P-FET ON resistance

RDS ON,P

IFET = 0.5 A —

205

—



Output DC offset voltage

VOFFSET

Inputs AC coupled to ground —

±5

—

Time from shutdown to audio out

tSD

RESET deasserted, zero-crossing disabled —

—

Generic Simulated

Speaker Load

RSENSE

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



H

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