LM4921

SNAS178E – JULY 2003 – REVISED MAY 2013

www.ti.com

Electrical Characteristics-Digital Inputs DVDD = 3.0V

(1) (2)

The following specifications apply for the circuit shown in Figure 1 unless otherwise specified. Limits apply for TA = 25°C.

LM4921

Units

Symbol

Parameter

Conditions

(Limits)

Typical(3)

Limit(4)(5)

Resolution

16

Bits

I2S

Audio Data Interface Format

Standard, I2S, Left Justified

fMCLK

Master Clock Frequency

11.2896

MHz

(256FS)

fCONV

Sampling Clock Frequency Range

44.1

48

kHz

VIL

Digital Input: Logic Low Voltage

0.3 X DVDD

V (max)

Level

VIH

Digital Input: Logic High Voltage

0.7 X DVDD

V (min)

Level

tES

SPI_ENB Setup Time

20

ns (min)

tEH

SPI_ENB Hold Time

20

ns (min)

tEL

SPI_ENB Low Time

30

ns (min)

tDS

SPI_Data Setup Time

20

ns (min)

tDH

SPI_Data Hold Time

20

ns (min)

tCS

SPI_CLK Setup Time

20

ns (min)

tCH

SPI_CLK High Pulse Width

100

ns (min)

tCL

SPI_CLK Low Pulse Width

100

ns (min)

fCLK

SPI_CLK Frequency

5

MHz (max)

tCLKI2S

I2S_CLK Period

50

ns (min)

tHII2S

I2S_CLK High Pulse Width

20

ns (min)

I2S_CLK Low Pulse Width

20

ns (min)

tLOI2S

I2S_LRCLK Duty Cycle

50

%

tSLRCLK

I2S_LRCLK to I2S_CLK Setup Time

20

ns (min)

tHLRCLK

I2S_LRCLK to I2S_CLK Hold Time

20

ns (min)

tSDI2S

I2S_Data to I2S_CLK Setup Time

20

ns (min)

tHDI2S

I2S_Data to I2S_CLK Hold Time

20

ns (min)

(1)

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.

(2)

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

(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.

8

Submit Documentation Feedback

Copyright © 2003–2013, Texas Instruments Incorporated

Product Folder Links: LM4921