TS4956 datasheet(14/51 Pages) STMICROELECTRONICS

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Electrical characteristics

TS4956

14/51

SNR

Signal To Noise Ratio

A-weighted, G = +1.5dB, THD+N < 0.5%,

20Hz < F < 20kHz

Mode 1 - Speaker output, RL =8Ω

Mode 2 - Speaker output, RL =8Ω

Mode 3 - Headphone output, RL =16Ω

Mode 4 - Headphone output, RL =16Ω

Mode 5 - MLO output, RL =16Ω

Mode 6 - MLO output, R = 16

Ω

Mode 7 - BTL, Speaker output, RL =8Ω,

G = +10.5dB

Digital Gain Range

-34.5

+12

Digital Gain Stepsize

1.5

Stepsize Error

0.1

0.6

Zin

Input Impedance, all Gain

setting

Differential input

Differential input impedance (MIP to MIN)

MIP input impedance referenced to ground

MIN input impedance referenced to ground

Stereo input

RIN input impedance

LIN input impedance

25.5

34.5

Ω

tWU

Wake up time

tSTBY

Standby time

µs

Internal power limitation on headphone outputs (see application information).

Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is an added sinus signal to VCC @ F = 217Hz.

Table 12.

VCC = +5 V, GND = 0V, Tamb = 25°C (unless otherwise specified)

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

Table 13.

Output noise VCC = 2.7V to 5.5V (all inputs grounded)

G = +12dB

G = +10.5dB

G = +1.5dB

A-weighted

filter

Unweighted

filter

(20Hz -

20kHz)

A-weighted

filter

Unweighted

filter

(20Hz -

20kHz)

A-weighted

filter

Unweighted

filter

(20Hz -

20kHz)

Vout (µV)

Mode1 - SPK out

100

Mode2 - SPK out

111

Mode3 - LHP, RHP

100

Mode4 - LHP, RHP

Mode5 - MLO

Mode6 - MLO

106

Mode7 - BTL, SPK out

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