EVAL-ADMP441Z-FLEX datasheet(4/16 Pages) AD

Part #	EVAL-ADMP441Z-FLEX

Description	Omnidirectional Microphone with Bottom Port and I2S Digital Output

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ADMP441

Data Sheet

Rev. B | Page 4 of 16

I²S DIGITAL INPUT/OUTPUT

–40°C < TA < +85°C, 1.8 V < VDD < 3.3 V, unless otherwise noted.

Table 2.

Limit1

Parameter

Symbol

Test Conditions/Comments

Min

Max

Unit

DIGITAL INPUT

Voltage Input Low (L/R, WS, SCK)

V

IL

0

0.25 × VDD

V

Voltage Input High (L/R, WS, SCK)

V

IH

0.7 × V

DD

V

DD

V

SD DIGITAL OUTPUT

Voltage Output Low

V

OL

V

DD = 1.8 V, ISINK = 0.25 mA

0.1 × V

DD

V

Voltage Output Low

V

OL

V

DD = 1.8 V, ISINK = 0.7 mA

0.3 × V

DD

V

Voltage Output High

V

OH

V

DD = 1.8 V, ISINK = 0.7 mA

0.7 × V

DD

V

Voltage Output High

V

OH

V

DD = 1.8 V, ISINK = 0.25 mA

0.9 × V

DD

V

Voltage Output Low

V

OL

V

DD = 3.3 V, ISINK = 0.5 mA

0.1 × V

DD

V

Voltage Output Low

V

OL

V

DD = 3.3 V, ISINK = 1.7 mA

0.3 × V

DD

V

Voltage Output High

V

OH

V

DD = 3.3 V, ISINK = 1.7 mA

0.7 × V

DD

V

Voltage Output High

V

OH

V

DD = 3.3 V, ISINK = 0.5 mA

0.9 × V

DD

V

1 Limits based on characterization results; not production tested.

Table 3. Serial Data Port Timing Specifications

Parameter

Description

Min

Max

Unit

t

SCH

SCK high

50

ns

t

SCL

SCK low

50

ns

t

SCP

SCK period

312

ns

f

SCK

SCK frequency

0.5

3.2

MHz

t

WSS

WS setup

0

ns

t

WSH

WS hold

20

ns

f

WS

WS frequency

7.8

49.3

kHz

TIMING DIAGRAM

SCK

WS

SD

tSCP

tSCH

tSCL

tWSH

tWSS

Figure 3. Serial Data Port Timing

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