Electrical Characteristics DV

(Notes 1, 2, 8) (Continued)

The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T

Symbol

Parameter

Conditions

LM4930

Units

(Limits)

Typical

(Note 6)

Limits

(Notes 7,

15)

LPB

VADC

Voice ADC Lower Passband

Cutoff Frequency.

Lower -3dB Point

0.230

kHz

SBA

VADC

Voice ADC Stopband Attenuation

Above 4kHz

65

dB

SBA

Centered on 55Hz, figure gives worst

case attenuation for 50Hz & 60Hz.

58

dB

R

DAC

Audio DAC Ripple

20Hz - 20kHz through head-phone output.

+/-0.1

+/-0.2

dB (max)

PB

DAC

Audio DAC Passband Width

-3dB point

22.7

kHz

SBA

DAC

Audio DAC Stopband Attenuation

Above 24kHz

76

dB

DR

DAC

Audio DAC Dynamic Range

Digital Filter Section

f = 1kHz; Noise for -60dBFS digital input;

0dB gain; A-weighted

97

dB

SNR

DAC

Audio DAC SNR Digital Filter

Section

f = 1kHz; Noise for -60dBFS digital input;

0dB gain; A-weighted

97

dB

∆A

CH-CH

Stereo Channel-to-Channel Gain

Mismatch

0.3

dB

V

IL

Digital Input: Logic Low Voltage

Level

0.4

V

V

IH

Digital Input: Logic High Voltage

Level

1.4

V

Volume Control Range

(Headphone amplifiers)

Maximum Attenuation

Minimum Attenuation

-46.5

0

dB

dB

Volume Control Range (Mono

speaker amplifier)

Minimum Gain

Maximum Gain

-34.5

12

dB

dB

Volume Control Step Size (Output

amplifiers)

1.5

dB

Volume Control Range

(Microphone Preamp)

Minimum Gain

Maximum Gain

17

47

dB

dB

Volume Control Step Size

(Microphone Preamp)

2dB

Side Tone Attenuation Range

Maximum Attenuation

Minimum Attenuation

-30

0

dB

dB

Side Tone Attenuation Step Size

3

dB

f

MCLK

MCLK frequency

CLOCK_DIV = 0

CLOCK_DIV = 1

12.288

24.576

MHz

MHz

MCLK Duty Cycle

50

40

60

% (min)

% (max)

f

CONV

Sampling Clock Frequency (Note

9)

48

kHz

f

CLKSCL

SCL_CLK Frequency

400

kHz

t

RISESCL

SCL_CLK, SCL_DATA Rise Time

300

ns

t

FALLSCL

SCL_CLK, SDA_DATA Fall Time

300

ns

t

SDAH

SDA_DATA Hold Time

500

ns

t

SDAS

SDA_DATA Setup Time

500

ns

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