ADMP411 datasheet(3/12 Pages) AD

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Data Sheet

ADMP411

Rev. 0 | Page 3 of 12

SPECIFICATIONS

TA = 25°C, VDD = 1.8 V, unless otherwise noted. All minimum and maximum specifications are guaranteed. Typical specifications are not

guaranteed.

Table 1.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

PERFORMANCE

Directionality

Omni

Sensitivity

1 kHz, 94 dB SPL

−48

−46

−44

dBV

Signal-to-Noise Ratio (SNR)

20 Hz to 20 kHz, A-weighted

dBA

Equivalent Input Noise (EIN)

20 Hz to 20 kHz, A-weighted

dBA SPL

Dynamic Range

Derived from EIN and maximum acoustic input

Frequency Response1

Low frequency −3 dB point

High frequency −3 dB point

>20

kHz

Total Harmonic Distortion (THD)

105 dB SPL

0.2

Power Supply Rejection (PSR)

217 Hz, 100 mV p-p square wave superimposed on VDD = 1.8 V

−80

dBV

Power Supply Rejection Ratio (PSRR)

1 kHz, 100 mV p-p sine wave superimposed on VDD = 1.8 V

−46

Acoustic Overload Point

10% THD

131

dB SPL

POWER SUPPLY

Supply Voltage (VDD)

1.5

3.63

Supply Current (IS)

VDD = 1.8 V

180

220

µA

VDD = 3.3 V

210

250

µA

OUTPUT CHARACTERISTICS

Output Impedance (ZOUT)

200

Output DC Offset

0.8

Maximum Output Voltage

131 dB SPL input

0.355

V rms

Noise Floor

20 Hz to 20 kHz, A-weighted, rms

−108

dBV

See Figure 5 and Figure 6.

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