If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Supply Voltage

6.0V

Storage Temperature

−65˚C to +150˚C

Input Voltage

-0.3V to V

Power Dissipation (Note 3)

Internally Limited

ESD Susceptibility

Human body model (Note 4)

2000V

Machine model (Note 5)

200V

Junction Temperature

150˚C

Thermal Resistance

θ

JA

60˚C/W

Operating Ratings

Temperature Range

T

MIN

≤ T

A

≤ T

MAX

−40˚C

≤ T

A

≤ 85˚C

Supply Voltage

DV

DD

2.6V

≤ DV

DD

≤ 5.0V

AV

DD

2.6V

≤ AV

DD

≤ 5.5V

Electrical Characteristics DV

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

Symbol

Parameter

Conditions

LM4921

Units

(Limits)

Typical

Limit

(Note 6)

(Notes 7, 9)

DV

DD

Digital Power Supply Voltage

Note 8

3.0

V

AV

DD

Analog Power Supply Voltage

Note 8

5.0

V

DI

DD

Digital Power Supply Quiescent

Current

R

3.5

7.5

mA (max)

AI

DD

Analog Power Supply Quiescent

Current

R

6

10

mA (max)

I

SD

Total Shutdown Power Supply

Current

SHUTDOWN SPI bits1&2set to

logic 0,

SPI, M

1

5

uA(max)

I

SB

Standby Current

Analog and Digital together

All clocks off

25

uA

V

FS

Full-Scale Output Voltage

Gain set at max

3.5

V

P-P

THD+N

Total Harmonic Distortion + Noise

f

(Vol Control = 11111, I

to get 12mW at output)

0.03

%

P

O

Headphone Amplifier Output Power THD = (0.5%), f

50

40

mW (min)

PSRR

Power Supply Rejection Ratio

AV

V

62

45

dB (min)

SNR

Signal-to-Noise Ratio

f

A-weighted-f

82

dB

DR

Dynamic Range

f

A-weighted

84

dB

∆A

CH-CH

Channel-to-Channel Gain Mismatch f

0.06

dB

X

TALK

Channel-to-Channel Crosstalk

f

f

72

dB

Volume Control Range

Minimum Attenuation

Maximum Attenuation

+3.0

-43.5

dB

dB

Volume Control Control Step Size

1.5

dB

Mute Attenuation

-102

dB

www.national.com

5