INMP521

SPECIFICATIONS

TABLE 1. ELECTRICAL CHARACTERISTICS

are guaranteed across temperature, voltage, and clock frequency specified in Table 1, 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

65

dBA

Equivalent Input Noise (EIN)

20 Hz to 20 kHz, A-weighted

29

dBA SPL

Dynamic Range

Derived from EIN and

maximum acoustic input

91

dB

Frequency Response

Low frequency −3 dB point

100

Hz

2

High frequency −3 dB point

16

kHz

Total Harmonic Distortion (THD)

105 dB SPL

2.5

%

Power-Supply Rejection (PSR)

217 Hz, 100 mVp-p square

1.8 V

−80

dBFS

Maximum Acoustic Input

Peak

120

dB SPL

POWER SUPPLY

1.62

3.63

V

Normal

Mode

0.9

1.0

mA

Sleep Mode

0.5

µA

3

Normal

Mode

1.0

1.2

mA

Sleep Mode

0.8

µA

3

DIGITAL INPUT/OUTPUT CHARACTERISTICS

0.65 x

V

0.35 x

V

0.7 x

V

0

0.3 x

V

Output DC Offset

Percent of full scale

5

%

Latency

<30

µs

Noise Floor

20 Hz to 20 kHz, A-weighted

−91

dBFS

Note 1: Relative to the RMS level of sine wave with positive amplitude equal to 100% logical 1s density and negative amplitude equal to 0% logical 1s density.

Note 2: See Figure 4 and Figure 5.

Note 3: The microphone enters sleep mode when the clock frequency is less than 1 kHz.

Page 4 of 20

Document Number: DS-INMP521-00

Revision: 1.0.