LM4937

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SNAS369J – OCTOBER 2006 – REVISED MAY 2013

VOLUME CONTROL ELECTRICAL CHARACTERISTICS

(1)(2) (continued)

The following specifications apply for 3.0V

Symbol

Parameter

Conditions

LM4937

Units

(Limits)

18

k

Ω (min)

23

Impedance

28

k

Ω (max)

DIGITAL SECTION ELECTRICAL CHARACTERISTICS

(1) (2)

The following specifications apply for 3.0V

Symbol

Parameter

Conditions

LM4937

Units

(Limits)

Digital Shutdown Current

No MCLK

0.01

μA

Digital Power Supply Current

5.3

6.5

mA (max)

ALL MODES EXCEPT 0

PLL Quiescent Current

4.8

6

mA (max)

Audio DAC (Typical numbers are with 6.144MHz audio clock and 48kHz sampling frequency

Audio DAC Ripple

20Hz - 20kHz through headphone output

+/-0.1

dB

Audio DAC Passband width

-3dB point

22.6

kHz

Audio DAC Stop band Attenuation

Above 24kHz

76

dB

Audio DAC Dynamic Range

DC - 20kHz, –60dBFS; AES17 Standard

Table 4

dB

See Table 4

Audio DAC-AMP Signal to Noise

Ratio

1kHz

SNR

Table 4

dB

Noise = digital zero, A-weighted, See

Table 4

Internal DAC SNR

95

dB

PLL

10

Input Frequency on MCLK pin

12

MHz

26

Maximum SPI Frequency

1000

kHz (max)

SPI Data Setup Time

250

ns (max)

SPI ENB Setup Time

250

ns (max)

SPI Data Hold Time

250

ns (max)

SPI ENB Hold Time

250

ns (max)

SPI Clock Low Time

500

ns (max)

SPI Clock High Time

500

ns (max)

400

kHz (max)

250

ns (max)

250

ns (max)

(1)

All voltages are measured with respect to the GND pin unless otherwise specified.

(2)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for

which the device is functional but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical

specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the

Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication

of device performance.

(3)

Typicals are measured at 25°C and represent the parametric norm.

(4)

Limits are specified to AOQL (Average Outgoing Quality Level).

(5)

Datasheet min/max specification limits are specified by design, test, or statistical analysis.

(6)

Internal DAC only with DAC modes 00 and 01.

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