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| FAN3850A Datasheet, PDF (4/11 Pages) Fairchild Semiconductor – Microphone Pre-Amplifier with Digital Output | |||
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Device Specific Electrical Characteristics
Unless otherwise specified, all limits are guaranteed for TA=25°C, VDD=1.8V, VIN=94dB (SPL), and fCLK=2.4MHz.
Duty Cycle=50% and CMIC=15pF.
Symbol
Parameter
SNR
eN
VIN
Signal-to-Noise Ratio
fIN=1kHz (1Pa), A-Weighted
Total Input RMS Noise(4)
20Hz to 20kHz, A-Weighted
Maximum Input Signal
fIN=1kHz, THD+N < 10%, Level=0V
FAN3850AUC16X
FAN3850AUC19X
Min. Typ. Max. Min. Typ. Max.
62
61
5.74 6.80
4.45 5.30
448
317
Unit
dB(A)
μVRMS
mVPP
Electrical Characteristics
Unless otherwise specified, all limits are guaranteed for TA=25°C, VDD=1.8V, VIN=94dB (SPL), and fCLK=2.4MHz.
Duty Cycle=50% and CMIC=15pF.
Symbol
Parameter
VDD
Supply Voltage Range
IDD
Supply Current
ISLEEP Sleep Mode Current
PSR
Power Supply Rejection(4)
INNOM
THD
Nominal Sensitivity(5)
Total Harmonic Distortion(6)
THD+N THD and Noise(4)
CIN
RIN
VIL
VIH
VOL
VOH
VOUT
Input Capacitance(7)
Input Resistance(7)
CLOCK & SELECT Input
Logic LOW Level
CLOCK & SELECT Input
Logic HIGH Level
Data Output Logic LOW
Level
Data Output Logic HIGH
Level
Acoustic Overload Point(7)
Condition
INPUT=AC Coupled to GND,
CLOCK=On, No Load
fCLK=GND
INPUT=AC Coupled to GND,
Test Signal on VDD=217Hz
Square Wave and
Broadband Noise(3), Both
100mVP-P
INPUT=94dBSPL (1Pa)
fIN=1kHz, INPUT=-26dBFS
50Hz  fIN  1kHz,
INPUT=-20dBFS
fIN=1kHz, INPUT=-5dBFS
fIN=1kHz, INPUT=0dBFS
INPUT
INPUT
Min.
1.64
>100
Typ.
1.80
470
1.5
-74
-26
0.02
0.2
1.0
5.0
0.2
Max.
3.63
8.0
Unit
V
ÈA
ÈA
dBFS
dBFS
0.20
%
1.0
5.0
%
10.0
pF
GÈ
0.3
V
1.5
VDD+0.3
V
0.35*VDD
V
THD < 10%
0.65*VDD
120
V
dBSPL
Continued on the following pageâ¦
© 2010 Fairchild Semiconductor Corporation
FAN3850A ⢠Rev. 3.0.6
4
www.fairchildsemi.com
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