Electrical characteristics

TS2012

12/29

DocID14236 Rev 2

3.2

Electrical characteristic curves

The graphs shown in this section use the following abbreviations:

•

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

•

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

Ω and 0.5 µF + 60 µH for 8 Ω)

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

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

Figure 2. Test diagram for measurements

VN

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

Unweighted (filterless, G = 6 dB)

A-weighted (filterless, G = 6 dB)

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

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

Unweighted (filterless, G = 24 dB)

A-weighted (filterless, G = 24 dB)

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

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

57

34

54

33

110

71

104

69

µVRMS

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

Table 7. VCC = +2.5V, GND = 0V, Vic=1.25V, Tamb = 25°C

(unless otherwise specified) (continued)

Symbol

Parameter

Min.

Typ.

Max.

Unit

Vcc

Cin

Cin

(CsR)

1/2 TS2012

C

100nF

In+

In-

15 H or 30 H

μμ

or

LC Filter

Out+

Out-

1 F

μ

Ω

4 or 8

RL

5th order

50kHz

low-pass filter

Audio Measurement

Bandwith < 30kHz

GND

GND

GND

S

CsL