ADMP441 datasheet(3/16 Pages) AD

Teilenummer	ADMP441

Bauteilbeschribung	Omnidirectional Microphone

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Data Sheet

ADMP441

Rev. A | Page 3 of 16

SPECIFICATIONS

TA = 25°C, VDD = 2.4 V, SCK = 3.072 MHz, SPL = 104 dB (3.16 Pa rms), unless otherwise noted. All minimum and maximum

specifications are guaranteed. Typical specifications are not guaranteed.

Table 1.

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

PERFORMANCE

Directionality

Omni

Sensitivity at 94 dB SPL1

1 kHz, 104 dB SPL

−29

−26

−23

dBFS

Signal-to-Noise Ratio

SNR

20 kHz bandwidth, A-weighted

61

dBA

Equivalent Input Noise

EIN

20 kHz bandwidth, A-weighted

33

dBA SPL

Dynamic Range

Derived from EIN and maximum acoustic input

87

dB

Frequency Response2

Low frequency –3 dB point

60

Hz

High frequency –3 dB point

15

kHz

Deviation limits from flat response within pass band

−3/+2

dB

Total Harmonic Distortion

THD

104 dB SPL

3

%

Power Supply Rejection

PSR

217 Hz, 100 mV p-p square wave superimposed on VDD

−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

VDD

1.8

3.3

V

Supply Current

IDD

VDD = 1.8 V

Normal Mode

1.4

1.6

mA

Standby

0.8

mA

Power-Down

2

μA

VDD = 3.3 V

Normal Mode

2.2

2.5

mA

Standby

0.8

mA

Power-Down

4.5

μA

DIGITAL FILTER

Group Delay

17.25/fS

sec

fS = 48 kHz

359

μs

fS = 16 kHz

1078

μs

Pass-Band Ripple

±0.04

dB

Stop-Band Attenuation

60

dB

Pass Band

0.423 × fS

20.3

kHz

1 The peak-to-peak amplitude is relative to peak-to-peak amplitude of 224 − 1. The stimulus is a 104 dB SPL sinusoid having rms amplitude of 3.1623 Pa. Sensitivity is

relative to 1 Pa.

2 See Figure 6 and Figure 8.

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