5.5 Electrical Characteristics (continued)

over operating free-air temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

IVSHUNT-

TA

Active Current into VSHUNT

Tone Mode(1), (Figure 6-4)

104

123

μA

VTR

Tone Mode Threshold Voltage - Rising

MIC Rising (microphone enable),

VMICPWR = 1.0V, (Figure 6-6 and Figure

6-7)

2.20

2.35

2.5

V

VTF

Tone Mode Threshold Voltage - Falling

MIC Falling (microphone enable),

VMICPWR = 0.4V, (Figure 6-6 and Figure

6-7)

0.55

0.8

1

V

VMICPWR MICPWR Output Voltage

IMICPWR = 120μA to 150μA, (Figure 6-5)

1.51

1.56

1.61

V

RSO

Shunt Regulator Output Impedance

Freq = 100Hz, (Figure 6-8)

5

18

25

Ω

Freq = 20kHz, (Figure 6-8)

12

21

35

Ω

Freq = 300kHz, (Figure 6-8)

300

458

650

Ω

Freq = 1MHz, (Figure 6-8)

2600

2830

3300

Ω

RONA

Switch A, RDSON

Tone Mode, IMICPWR = 1mA,

VMICBIAS = 2.56V, (Figure 6-9)

40

55

Ω

RONB

Switch B, RDSON

Button Mode, IREM = 1mA,

VMIC = 1.2V, (Figure 6-10)

22

30.5

Ω

Tone and Button Mode Parameters

en-mic100 MIC Integrated Noise

100Hz to 20kHz, (Figure 6-1)

1.5

2

μVRMS

en-mic1K

MIC Integrated Noise

1kHz to 20kHz, (Figure 6-1)

0.39

1

μVRMS

fTONE1

Button 1 Frequency - CD3268 ACK Tone RREM = 6.81kΩ, (Figure 6-13)

109

130

159

kHz

fTONE2

Button 2 Frequency - CD3269 ACK Tone RREM = 9.42kΩ, (Figure 6-13)

138

165

200

kHz

fTONE3

Button 3 Frequency

RREM = 12.99kΩ, (Figure 6-13)

167

201

242

kHz

fTONE4

Button 4 Frequency

RREM = 19.8 kΩ, (Figure 6-13)

196

237

284

kHz

fCAL

Calibration Frequency

(Figure 6-13)

225

271

325

kHz

fREL

Button Release Frequency

(Figure 6-13)

81

97

117

kHz

BR1

Button 1 Ratio

fTONE1 / fCAL

0.470

0.488

0.500

BR2

Button 2 Ratio

fTONE2 / fCAL

0.600

0.609

0.630

BR3

Button 3 Ratio

fTONE3 / fCAL

0.730

0.740

0.758

BR4

Button 4 Ratio

fTONE4 / fCAL

0.860

0.876

0.890

BRREL

Button Release Ratio

fREL / fCAL

0.340

0.360

0.380

RBT1

Button 1 Boundary

6.61

6.81

7.01

kΩ

RBT2

Button 2 Boundary

9.14

9.42

9.7

kΩ

RBT3

Button 3 Boundary

12.60

12.99

13.38

kΩ

RBT4

Button 4 Boundary

19.21

19.80

20.39

kΩ

VTA

Tone Amplitude

RTONE = 1MΩ, (Figure 6-11 and Figure

6-12)

350

550

720

mVp-p

RTONE = 100kΩ, (Figure 6-11 and Figure

6-12)

300

515

710

mVp-p

RTONE = 10kΩ, (Figure 6-11 and Figure

6-12)

200

390

620

mVp-p

RTONE = 1kΩ, (Figure 6-11 and Figure

6-12)

40

140

320

mVp-p

(1)

This current is pulled through RVSHUNT between MIC and VSHUNT and is the minimum current to keep VSHUNT regulated at

1.56V. Excess current through RVSHUNT will be available to the load at MICPWR. Excess current not used by the load at MICPWR will

be internally shunted to GND.

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SCHS463 – MAY 2025

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