FAN3850A Datasheet, PDF (6/11 Pages) Fairchild Semiconductor – Microphone Pre-Amplifier with Digital Output

Typical Performance Characteristics
Unless otherwise specified, all limits are guaranteed for T_A=25°C, V_DD=1.8V, V_IN=94dB(SPL), f_CLK=2.4MHz, and duty
cycle=50%.
-20
THD = 81.95 dB
SNR = 60.88 dBc(A)
SINAD = 56.87 dB
-40
ENOB = 13.50
N = 2097152 pts
Blackman Window
-60
Amplitude Spectrum [dBFS], Fo = 1000.2135 Hz, Fs = 2.400000 MHz, SNR = 56.89 dB, SNR = 60.88 dB(A), THD = 0.008 %
m Fo(0)= -26.15 dBFS
Noise
Noise(A)
Signal
-80
p Integrated Noise = -87.03 dBFS(A)
-100
p Spur = -101.34 dBFS, SFDR = 75.19 dBc
m Fo(1)= -110.28 dBFS
m Fo(2)= -116.40 dBFS
-120
m Fo(3)= -120.45 dBFS
m Fo(4)= -125.03 dBFS
-140
-160
10¹
10²
10³
10⁴
10⁵
10⁶
Frequency [Hz]
Filename: fan3850a-1-BD9₂M-20110125T122914.dat
Figure 4. Noise vs. Frequency
Figure 5. THD, SINDA, and SNR vs. Input Amplitude
© 2010 Fairchild Semiconductor Corporation
FAN3850A • Rev. 3.0.6
6
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