LM48312

SNAS494D – JANUARY 2010 – REVISED MAY 2013

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Electrical Characteristics VDD = PVDD = 5V

(1) (2)

The following specifications apply for AV = 6dB, RL = 8Ω, f = 1kHz, unless otherwise specified. Limits apply for TA = 25°C.

LM48312

Units

Symbol

Parameter

Conditions

Min

Typ

Max

(Limits)

(3)

(4)

(3)

VDD

Supply Voltage Range

2.4

5.5

V

VIN = 0, RL = 8Ω

IDD

Quiescent Power Supply Current

VDD = 3.3V

2.6

3.3

mA

VDD = 5V

3.1

3.9

mA

ISD

Shutdown Current

Shutdown enabled

0.01

1.0

μA

VOS

Differential Output Offset Voltage

VIN = 0

–48

10

48

mV

VIH

Logic Input High Voltage

1.4

V

VIL

Logic Input Low Voltage

0.4

V

TWU

Wake Up Time

7.5

ms

fSW

Switching Frequency

300±30

kHz

GAIN = FLOAT

–0.5

0

0.5

dB

GAIN = VDD

2.5

3

3.5

dB

AV

Gain

GAIN = GND

5.5

6

6.5

dB

GAIN = 20k

Ω to GND

8.5

9

9.5

dB

GAIN = 20k

Ω to VDD

11.5

12

12.5

dB

AV = 0dB

56

k

Ω

AV = 3dB

49

k

Ω

RIN

Input Resistance

AV = 6dB

42

k

Ω

AV = 9dB

35

k

Ω

AV = 12dB

20

27

k

Ω

RL = 4Ω, THD = 10%

f = 1kHz, 22kHz BW

VDD = 5V

2.6

W

VDD = 3.3V

1.1

W

VDD = 2.5V

580

mW

RL = 8Ω, THD = 10%

f = 1kHz, 22kHz BW

VDD = 5V

1.6

W

VDD = 3.3V

660

mW

VDD = 2.5V

354

mW

PO

Output Power

RL = 4Ω, THD = 1%

f = 1kHz, 22kHz BW

VDD = 5V

2.1

W

VDD = 3.3V

900

mW

VDD = 2.5V

460

mW

RL = 8Ω, THD = 1%

f = 1kHz, 22kHz BW

VDD = 5V

1.1

1.3

W (min)

VDD = 3.3V

450

530

mW

VDD = 2.5V

286

mW

PO = 200mW, RL = 8Ω, f = 1kHz

0.027

%

THD+N

Total Harmonic Distortion + Noise

PO = 100mW, RL = 8Ω, f = 1kHz

0.03

%

VRIPPLE = 200mVP-P Sine,

Inputs AC GND, AV = 0dB,

PSRR

Power Supply Rejection Ratio

CIN = 1μF

fRIPPLE = 217Hz

71

dB

fRIPPLE = 1kHz

70

dB

VRIPPLE = 1VP-P , fRIPPLE = 217Hz

CMRR

Common Mode Rejection Ratio

65

dB

AV = 0dB

(1)

The Electrical Characteristics tables list ensured specifications under the listed Recommended Operating Conditions except as

otherwise modified or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and

are not ensured.

(2)

RL is a resistive load in series with two inductors to simulate an actual speaker load. For RL = 8Ω, the load is 15µH + 8Ω, +15µH. For RL

= 4

Ω, the load is 15µH + 4Ω + 15µH.

(3)

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

(4)

Typical values represent most likely parametric norms at TA = +25°C, and at the Recommended Operation Conditions at the time of

product characterization and are not ensured.

4

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