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<strong>UAC</strong> <strong>357xB</strong><br />
ADVANCE INFORMATION<br />
Different Characteristics in Five-Volt Mode<br />
Symbol Parameter Pin Name Min. Typ. Max. Unit Test Conditions<br />
V MICBIAS<br />
Open Circuit Voltage<br />
Microphone Bias<br />
MICBIAS 3.9 4.1 4.3<br />
V SREF Signal Reference Voltage SREF 2.25 2.3 2.35 V R L >> 10 MΩ,<br />
referred to SGND<br />
V AI<br />
V MI<br />
Analog Line Input Clipping<br />
Level (at input volume 0 dB)<br />
Microphone Input Clipping<br />
Level (at minimum input<br />
volume, i.e., 0 dB)<br />
ADCL/R 3.2 V pp<br />
MICINL/R 370 mV pp<br />
V AO Analog Output Voltage AC OUTL/R 3.2 V pp BW = 20 Hz...22 kHz,<br />
R L ≥ 10kΩ, volume =<br />
0 dB, Input 1 kHz at<br />
−3 dB FS digital (I 2 S)<br />
THD HP Total Harmonic Distortion OUTL/R −82 −75 dB BW = 20 Hz...22 kHz,<br />
R L = 32 Ω, Volume =<br />
0 dB, Input 1 kHz at −<br />
3dB FS digital (I 2 S)<br />
SNR AO1 Signal-to-Noise Ratio 2) OUTL/R<br />
OUTL/R−<br />
OUTC<br />
90 99<br />
95<br />
dB(A)<br />
BW = 20 Hz...22 kHz,<br />
A-weighted, R L ≥10kΩ,<br />
Volume = 0 dB,<br />
Input 1 kHz at<br />
− 20 dB FS digital (I 2 S)<br />
SNR AO2 Signal-to-Noise Ratio 2) OUTL/R 95 109 dB(A) BW = 20 Hz...22 kHz,<br />
A-weighted, R L ≥10kΩ,<br />
Volume = −40 dB,<br />
Input 1 kHz at<br />
−3 dB FS digital (I 2 S)<br />
P HP<br />
P HP<br />
Output Power<br />
(Speaker/Headphone)<br />
Output Power in Bridge<br />
Mode<br />
(Mono Speaker/Headphone)<br />
OUTL/R 40 mW eff R L = 32 Ω,<br />
Volume = 0 dB,<br />
Input = 0 dB FS digital<br />
(I 2 S)<br />
OUTL/R 320 mW eff R L = 16 Ω, no series<br />
resistors, right channel<br />
inverted and output set<br />
to mono (bridge mode)<br />
Volume = 0 dB, Input =<br />
0dB FS digital (I 2 S)<br />
Different Characteristics for Full-Feature Set (see Fig. 2–1 on page 6), Three-Volt Mode<br />
SNR AO1 Signal-to-Noise Ratio 2) OUTL/R 88 95 dB(A) BW = 20 Hz...22 kHz,<br />
A-weighted, R L ≥10kΩ,<br />
Volume = 0 dB,<br />
Input 1 kHz at<br />
− 20 dB FS digital (I 2 S)<br />
SNR AO2 Signal-to-Noise Ratio 2) OUTL/R 93 100 dB(A) BW = 20 Hz...22 kHz,<br />
A-weighted,<br />
R L ≥ 10 kΩ, Volume = −<br />
40 dB,<br />
Input 1 kHz at<br />
−3 dB FS digital (I 2 S)<br />
2) related to 0 dB FS input level<br />
4) not tested in production<br />
48 Aug. 20, 2004; 6251-650-1AI Micronas
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