background image

 

 

T3903

 

 

Page 5 of 21 

Document Number: DS-000358

 

Revision: 1.0 

 

TABLE 3. ACOUSTICAL/ELECTRICAL CHARACTERISTICS – LOW-POWER MODE 

T

A

 = 25

°C, V

DD 

= 1.8 V

 

to 3.3 V

, SCK = 768 kHz, C

LOAD

 = 30 pF unless otherwise noted. Typical specifications are not guaranteed. 

PARAMETER   

CONDITIONS 

MIN 

TYP 

MAX 

UNITS 

NOTES 

Sensitivity 

1 kHz, 94 dB SPL 

−27

 

−26

 

−25

 

dB FS 

Signal-to-Noise Ratio (SNR) 

8 kHz bandwidth, A-weighted 

 

63 

 

dBA 

 

Equivalent Input Noise (EIN) 

8 kHz bandwidth, A-weighted 

 

31 

 

dBA SPL 

 

Acoustic Dynamic Range 

Derived from EIN and acoustic overload point 

 

89 

 

dB 

 

 

Total Harmonic Distortion (THD) 

105 dB SPL  

 

0.15 

 

 

Power Supply Rejection (PSR) 

217 Hz, 100 mV p

-p square wave superimposed on 

VDD = 1.8 V, A

-weighted 

 

−9

 

dB FS 

 

Power Supply Rejection—Swept Sine 

1 kHz sine wave 

 

99 

 

dB FS 

 

Acoustic Overload Point 

10% THD 

 

120 

 

dB SPL 

 

Supply Current (I

S

V

DD

 

= 1.8 V, no load

 

 

220 

 

µA 

 

Note 3:

  Sensitivity is 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. 

 

 

TABLE 4. DIGITAL INPUT/OUTPUT CHARACTERISTICS 

T

A

 

= 25°C, 1.8 V < VDD 

3.3 V

, unless otherwise noted. 

PARAMETER   

CONDITIONS 

MIN 

TYP 

MAX 

UNITS 

NOTES 

Input Voltage High (V

IH

 

0.65 × 

V

DD

 

 

 

V

 

 

Input Voltage Low (V

IL

 

 

 

0.35 × 

V

DD

 

V

 

 

Output Voltage High (V

OH

I

LOAD

 = 0.5 mA 

0.7 × 

V

DD

 

V

DD

 

 

V

 

 

Output Voltage Low (V

OL

I

LOAD

 = 0.5 mA 

 

0.3 × 

V

DD

 

V

 

 

Output DC Offset 

Percent of full scale 

 

 

 

 

 

Summary of Contents for T3903

Page 1: ...Sleep The T3903 has high SNR in all operational modes It has 133 dB SPL AOP in High Quality Mode and 120 dB SPL AOP in Low Power mode The T3903 is available in a standard 3 5 2 65 0 98 mm surface moun...

Page 2: ...Absolute Maximum Ratings 7 Table 6 Absolute Maximum Ratings 7 ESD Caution 7 Soldering Profile 8 Table 7 Recommended Soldering Profile 8 Pin Configurations And Function Descriptions 9 Table 8 Pin Func...

Page 3: ...T3903 Page 3 of 21 Document Number DS 000358 Revision 1 0 Board Wash 18 Outline Dimensions 19 Ordering Guide 19 Revision History 20 Compliance Declaration Disclaimer 21...

Page 4: ...MIN TYP MAX UNITS NOTES Sensitivity 1 kHz 94 dB SPL 38 37 36 dB FS 2 Signal to Noise Ratio SNR 20 kHz bandwidth A weighted 66 dBA Equivalent Input Noise EIN 20 kHz bandwidth A weighted 28 dBA SPL Acou...

Page 5: ...dB SPL 0 15 Power Supply Rejection PSR 217 Hz 100 mV p p square wave superimposed on VDD 1 8 V A weighted 95 dB FS Power Supply Rejection Swept Sine 1 kHz sine wave 99 dB FS Acoustic Overload Point 10...

Page 6: ...ower and High Quality Mode 7 ms INPUT tCLKIN Input clock period 303 2500 ns Clock Frequency CLK Sleep Mode 200 kHz Low Power Mode 400 800 kHz High Quality Mode 2 0 3 3 MHz Clock Duty Cycle fCLK 3 3 MH...

Page 7: ...ER RATING Supply Voltage VDD 0 3 V to 3 63 V Digital Pin Input Voltage 0 3 V to VDD 0 3 V or 3 63 V whichever is less Mechanical Shock 10 000 g Vibration Per MIL STD 883 Method 2007 Test Condition B T...

Page 8: ...1 25 C sec 1 25 C sec Time Maintained Above Liquidous tL 45 sec to 75 sec 50 sec Liquidous Temperature TL 183 C 217 C Peak Temperature TP 215 C 3 C 3 C 260 C 0 C 5 C Time Within 5 C of Actual Peak Tem...

Page 9: ...t Channel or Right Channel Select DATA 1 right SELECT tied to GND DATA 2 left SELECT tied to VDD In this setting SELECT should be tied to the same voltage source as the VDD pin 3 GND Ground 4 CLK Cloc...

Page 10: ...10 0 0 0 10 0 20 0 10 100 1000 10000 NORMALIZED AMPLITUDE dB FREQUENCY Hz 0 01 0 10 1 00 10 00 90 100 110 120 130 140 THD N INPUT AMPLITUDE dB SPL High Quality Mode Low Power Mode 120 0 100 0 80 0 60...

Page 11: ...not enough to discharge the line while the driver is tristated Figure 10 Mono PDM Format See Table 9 for the channel assignments according to the logic level on the SELECT pin The setting on the SELE...

Page 12: ...an RMS level of 29 dB FS however this is not true because of the definition of the 0 dB FS sine wave Figure 11 1 kHz 0 dB FS Sine Wave There is not a commonly accepted unit of measurement to express t...

Page 13: ...lly use the 105 dB dynamic range of the output data of the T3903 in a design the digital signal processor DSP or codec circuit following it must be chosen carefully The decimation filter that inputs t...

Page 14: ...er large capacitive load a digital buffer may be required Only use a signal buffer on the DATA line when one microphone is in use or after the point where two microphones are connected see Figure 14 T...

Page 15: ...t is in a high impedance state The current consumption in sleep mode is 9 A The microphone wakes up from sleep mode and begins to output data 7 ms after the clock becomes active The wake up time indic...

Page 16: ...al Output MEMS Microphone Flex Evaluation Board User Guide AN 100 MEMS Microphone Handling and Assembly Guide AN 1003 Recommendations for Mounting and Connecting the TDK Bottom Ported MEMS Microphones...

Page 17: ...hole in the microphone package with the hole in the PCB The exact degree of the alignment does not affect the microphone performance as long as the holes are not partially or completely blocked Figure...

Page 18: ...e microphone with a vacuum tool that makes contact with the bottom side of the microphone Do not pull air out of or blow air into the microphone port Do not use excessive force to place the microphone...

Page 19: ...y LGA_CAV 3 5 mm 2 65 mm 0 98 mm Body Dimensions shown in millimeters Dimension tolerance is 0 15 mm unless otherwise specified Figure 18 Package Marking Specification Top View ORDERING GUIDE PART TEM...

Page 20: ...T3903 Page 20 of 21 Document Number DS 000358 Revision 1 0 REVISION HISTORY REVISION DATE REVISION DESCRIPTION 1 15 20 0 1 Initial preliminary version 5 5 20 1 0 Initial release...

Page 21: ...n contained in this document or from the use of products and services detailed therein This includes but is not limited to claims or damages based on the infringement of patents copyrights mask work a...

Reviews: