TS4974 datasheet(7/25 Pages) STMICROELECTRONICS

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TS4974

Electrical characteristics

7/25

Table 6.

VCC = +2.6V, GND = 0V, Tamb = 25°C (unless otherwise specified)

Symbol

Parameter

Min.

Typ.

Max.

Unit

ICC

Supply current

No input signal, no load

2.8

3.4

ISTBY

Standby current

No input signal, VSTBY = GND, RL = 8 Ω

230

2000

IU/D

Volume control UP/DOWN current

≤ VU/D ≤ 0.3 VCC

μA

Voo

Output offset voltage

No input signal, RL = 8 Ω, G = 0 dB, floating inputs

520

Output power

THD = 1% max, f = 1 kHz, RL = 8 Ω

200

250

THD + N

Total harmonic distortion + noise

Po = 500 mW rms,

20 Hz < F < 20 kHz, RL = 8 Ω, G = 0 dB, Cb= 1 µF, Cin= 330 nF

0.5

PSRR

Power supply rejection ratio(1)

F = 217 Hz, RL = 8 Ω

Vripple = 200 mVpp, input grounded, Cb= 1 µF, Cin= 330 nF, G= 0 dB

CMRR

Common mode rejection ratio(2)

F = 217 Hz, RL = 8 Ω,

Vincm = 200 mVpp, Cb = 1 µF, Cin= 330 nF, G= 0 dB

SNR

Signal-to-noise ratio (weighted A, G = 0 dB)

(RL = 8 Ω, THD + N ≤ 0.5%, 20 Hz < F < 20 kHz)

100

Start up gain (

when powered up from VCC - see Section 4.9:

Volume setting on page 20)

-12

Gain range

-33

+12

Gain step

size

3dB

Gain

accuracy

Tolerance between theoretical gain set and real gain

-1

twu

Wake-up time

Cb=1 µF

Output voltage noise F = 20 Hz to 20 kHz, RL = 8 Ω, G = 0 dB

Unweighted

A-weighted

µVRMS

Zin

Differential input impedance

tdebounce Debouncing time

tautorepeat Time between volume changes

220

trange

During autorepeat mode, necessary time to cover the whole gain

range

3200

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

Dynamic measurements - 20*log(rms(Vout)/rms(Vincm)).

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