TS2012IQT datasheet(12/30 Pages) STMICROELECTRONICS

12 / 30 page

Electrical characteristics

TS2012

12/30

3.2

Electrical characteristic curves

The graphs shown in this section use the following abbreviations:

●

RL+ 15µH or 30µH = pure resistor + very low series resistance inductor

●

Filter = LC output filter (1µF+30µH for 4

Ω and 0.5µF+60µH for 8Ω)

All measurements are done with CSL=CSR=1µF and CS=100nF (see Figure 2), except for

the PSRR where CSL,R is removed (see Figure 3).

Figure 2.

Test diagram for measurements

Output voltage noise f = 20Hz to 20kHz, RL=8Ω

Unweighted (filterless, G=6dB)

A-weighted (filterless, G=6dB)

Unweighted (with LC output filter, G=6dB)

A-weighted (with LC output filter, G=6dB)

Unweighted (filterless, G=24dB)

A-weighted (filterless, G=24dB)

Unweighted (with LC output filter, G=24dB)

A-weighted (with LC output filter, G=24dB)

110

104

µVRMS

Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the superimposed sinus signal to VCC @ f = 217Hz.

Table 7.

VCC = +2.5V, GND = 0V, Vic=1.25V, Tamb = 25°C (unless otherwise specified)

Symbol

Parameter

Min.

Typ.

Max.

Unit

Vcc

Cin

(CsR)

1/2 TS2012

100nF

In+

In-

15 H or 30 H

μμ

LC Filter

Out+

Out-

1 F

4 or 8

5th order

50kHz

low-pass filter

Audio Measurement

Bandwith < 30kHz

GND

CsL

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