Data Sheet

ADMP521

Rev. A | Page 3 of 16

SPECIFICATIONS

specifications are not guaranteed.

Table 1.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

PERFORMANCE

Directionality

Omni

Sensitivity1

1 kHz, 94 dB sound pressure level (SPL)

−29

−26

−23

dBFS

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 Response2

Low frequency −3 dB point

100

Hz

High frequency −3 dB point

16

kHz

Deviation limits from flat response within pass band

−3/+8

dB

Total Harmonic Distortion (THD)

105 dB SPL

2.5

%

Power Supply Rejection (PSR)

217 Hz, 100 mV p-p sine wave superimposed on

−80

dBFS

Maximum Acoustic Input

Peak

120

dB SPL

POWER SUPPLY

1.8

3.3

V

Normal Mode

0.9

1.0

mA

1.0

1.2

mA

Sleep Mode3

0.5

µA

0.8

µA

DIGITAL INPUT/OUTPUT CHARACTERISTICS

V

V

V

0

V

Output DC Offset

Percent of full scale

7

%

Latency

<30

µs

Noise Floor

20 Hz to 20 kHz, A-weighted

−91

dBFS

1

Relative to the rms level of a sine wave with positive amplitude equal to 100% 1s density and negative amplitude equal to 0% 1s density.

2

See Figure 7 and Figure 8.

3

The microphone enters sleep mode when clock frequency is less than 1 kHz.