INMP621

SPECIFICATIONS

TABLE 1. ELECTRICAL CHARACTERISTICS

specifications are guaranteed across temperature, voltage, and clock frequency specified in Table 1 and Table 2, unless otherwise

noted. Typical specifications are not guaranteed.)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

NOTES

PERFORMANCE

Directionality

Omni

Output Polarity

Input acoustic pressure vs.

output data

Inverted

Sensitivity

1kHz, 94 dB SPL

−48

−46

−44

dBFS

1, 2

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

Acoustic Dynamic Range

Digital Dynamic Range

Derived from EIN and

acoustic overload point

104

dB

2

Derived from EIN and full-

scale acoustic level

111

dB

Frequency Response

Low frequency −3 dB point

45

Hz

3

High frequency −3 dB

point

>20

kHz

Total Harmonic Distortion (THD)

105 dB SPL

0.35

1

%

Power Supply Rejection (PSR)

217 Hz, 100 mV p-p square

wave superimposed on

VDD = 1.8 V, A-weighted

−100

dBFS

Power Supply Rejection—Swept Sine

1 kHz sine wave

−113

dBFS

Acoustic Overload Point

10% THD

133

dB SPL

Full-Scale Acoustic Level

0 dBFS output

140

dB SPL

POWER SUPPLY

1.62

3.63

V

Normal Mode

1.2

1.5

mA

Sleep Mode

5.5

µA

4

Normal Mode

1.3

1.6

mA

Sleep Mode

8

µA

4

DIGITAL INPUT/OUTPUT CHARACTERISTICS

V

V

V

0

V

Output DC Offset

Percent of full scale

3

%

Latency

<30

µs

Noise Floor

20 Hz to 20 kHz, A-

weighted

−111

dBFS

Note 1: Sensitivity is relative to the RMS level of a sine wave with positive amplitude equal to 100% logical 1s density and negative amplitude equal to 0% logical 1s

density.

Page 4 of 20

Document Number: DS-INMP621-00

Revision: 1.0

Rev Date: 02/06/2014