INMP441
SPECIFICATIONS
TABLE 1. ELECTRICAL CHARACTERISTICS
(T
A
= −40 to 85°C, V
DD
= 1.8 to 3.3
V, CLK =
2.4 MHz, C
LOAD
= 30 pF, unless otherwise noted. All minimum and
maximum specifications are guaranteed across temperature, voltage, and clock frequency specified in Table 1, Table
2, Table 3, unless otherwise noted. Typical specifications are not guaranteed.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
NOTES
PERFORMANCE
Directionality
Omni
Sensitivity
1 kHz, 94 dB SPL
−
29
−
26
−
23
dBFS
1
Signal-to-Noise Ratio (SNR)
20 Hz to 20 kHz, A-weighted
61
dBA
Equivalent Input Noise (EIN)
20 Hz to 20 kHz, A-weighted
33
dBA SPL
Dynamic Range
Derived from EIN and
maximum acoustic input
87
dB
Frequency Response
Low frequency
−
3 dB point
60
Hz
2
High frequency
−
3 dB point
15
kHz
Total Harmonic Distortion (THD)
105 dB SPL
3
%
Power-Supply Rejection (PSR)
217 Hz, 100 mV
p-p square
wave superimposed on V
DD
=
1.8 V
−
75
dBFS
Maximum Acoustic Input
Peak
120
dB SPL
Noise Floor
20 Hz to 20 kHz, A-weighted,
RMS
−
87
dBFS
POWER SUPPLY
Supply Voltage
(
V
DD
)
1.62
3.63
V
Supply Current (I
S
)
V
DD
= 1.8 V
Normal Mode
1.4
1.6
mA
Standby
0.8
mA
Power Down
2
µA
V
DD
= 3.3 V
Normal Mode
2.2
2.5
mA
Standby
0.8
mA
Power Down
4.5
µA
DIGITAL
FILTER
Group Delay
17.2/fS
sec
f
S
= 48 kHz
359
µs
f
S
= 16 kHz
1078
µs
Pass-Band Ripple
±0.04
dB
Stop-Band Attenuation
60
dB
Pass Band
0.423 × f
S
20.3
kHz
Note 1
: The peak-to-peak amplitude relative to peak-to-peak amplitude of (2
24
− 1.
) The stimulus is a 104 dB SPL sinusoid having RMS amplitude
of 3.1623 Pa. Sensitivity is relative to 1 Pa.
Note 2:
Page 4 of 21
Document Number: DS-INMP441-00
Revision: 1.1
