LM48557

SNAS486D – JULY 2009 – REVISED MAY 2013

www.ti.com

Electrical Characteristics VDD = 4.2V

(1) (2)

The following specifications apply for AV = 6dB, RL = 1µF + 22Ω, C1 = 2.2µF, C2 = 2.2µF, f = 1kHz, unless otherwise

specified. Limits apply for TA = 25°C.

LM48557

Symbol

Parameter

Conditions

Units

Min(3)

Typ(4)

Max(3)

VDD

Supply Voltage Range

2.7

4.5

V

I2CVDD

I2C Supply Voltage Range

1.7

4.5

V

IDD

Quiescent Power Supply Current

VIN = 0V, RL = ∞

5

8

mA

ISD

Shutdown Current

Shutdown Enabled

0.01

1

µA

VIN = 0V, AV = 0dB

3

12

mV

|VOS|

Differential Output Offset Voltage

VIN = 0V, AV = 48dB

40

160

mV

VIH

Logic High Input Threshold

RESET, VDD = 2.7V to 4.5V

1.4

V

VIL

Logic Low Input Threshold

RESET, VDD = 2.7V to 4.5V

0.4

V

Minimum Gain Setting

-25.5

-25

-24.5

dB

Volume Control = 000001

AV

Gain

Maximum Gain Setting

47

48

49

dB

Volume Control = 111111

AV(MUTE)

Mute Attenuation

Volume Control = 000000

–90

dB

RIN

Input Resistance

1

3

M

Ω

Common Mode Input Voltage

VIN

-1

1

VP-P

Range

RL = 1µF + 22Ω, THD+N = 1%

5.5

5.8

VRMS

f = 1kHz

15.6

16.4

VP-P

VO

Output Voltage

f = 5kHz

4.0

VRMS

RL = 2.2µF + 10Ω, THD+N = 1%

f = 1kHz

5.6

VRMS

f = 5kHz

2.9

VRMS

Total Harmonic Distortion +

THD+N

VO = 4VRMS, f = 1kHz, AV = 48dB

0.05

%

Noise

VDD = 4.2V + 200mVP-P (sine), Inputs AC GND, CIN = 0.1µF, AV = 0dB

fRIPPLE = 217Hz

80

dB

fRIPPLE = 1kHz

80

dB

Power Supply Rejection Ratio

PSRR

(Figure 4)

VDD = 4.2V + 200mVP-P (sine), Inputs AC GND, CIN = 0.1µF, AV = 48dB

f = 1kHz

15

40

dB

f = 5kHZ

40

dB

VCM = 200mVP-P (sine), CIN = 0.1µF, AV = 48dB

Common Mode Rejection Ratio

CMRR

fRIPPLE = 500Hz

16

36

dB

(Figure 5)

fRIPPLE = 1kHz

37

dB

Charge Pump Switching

fSW

230

300

370

kHz

Frequency

SNR

Signal To Noise Ratio

VOUT = 5VRMS, f = 1kHz, AV = 48dB

74

dB

AV = 0dB, A-Weighted Filter

20

30

µV

∈OS

Output Noise

AV = 48dB, A-weighted Filter

1

mV

(1)

“Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of

device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or

other conditions beyond those indicated in the Operating Ratings is not implied. The Operating Ratings indicate conditions at which the

device is functional and the device should not be operated beyond such conditions. All voltages are measured with respect to the

ground pin, unless otherwise specified.

(2)

The Electrical Characteristics tables list specified specifications under the listed Operating Ratings except as otherwise modified or

specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and are not ensured.

(3)

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

(4)

Typical values represent most likely parametric norms at TA = +25ºC, and at theOperation Rating at the time of product characterization

and are not ensured.

4

Submit Documentation Feedback

Copyright © 2009–2013, Texas Instruments Incorporated

Product Folder Links: LM48557