SNAS470D datasheet(6/24 Pages) TI

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LM48100Q

SNAS470D – OCTOBER 2008 – REVISED MARCH 2013

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Audio Amplifier Electrical Characteristics VDD = 3.6V

(1)(2) (continued)

The following specifications apply for Programmable Gain = 0dB, RL = 8Ω, f = 1kHz, unless otherwise specified. Limits apply

for TA = 25°C.

LM48100Q

Typical

Room

Extended

Units

Symbol

Parameter

Conditions

(3)

Temp

(Limits)

Limits

(4)

(4) (5)

dB (max)

Minimum Gain Setting

–54

±1

dB (min)

Gain

dB (max)

Maximum Gain Setting

±1

dB (min)

Mute

Mute Attenuation

–79

–77

dB (max)

11.5

Ω (min)

AV = 18dB

12.5

13.5

Ω (max)

RIN

Input Resistance

Ω (min)

AV = –54dB

110

120

135

Ω (max)

RL = 8Ω, f = 1kHz

Output Power

THD+N = 10%

820

THD+N = 1%

660

480

mW (min)

Total Harmonic Distortion +

THD+N

PO = 400mW, f = 1kHz, RL = 8Ω

0.04

% (max)

Noise

VRIPPLE = 200mVP-P Sine, Inputs AC GND, CIN_= 1μF, input referred, CBIAS = 2.2μF

Power Supply Rejection

PSRR

f = 217Hz

dB (min)

Ratio

f = 1kHz

SNR

Signal-to-Noise-Ratio

POUT = TBDmW, f = 1kHz

106

∈OS

Output Noise

AV = 0dB, A-weighted Filter

12.5

μV

IOUT(FAULT)

FAULT Output Current

FAULT = 0, VOUT(FAULT) = 0.4V

Short between either OUTA to VDD or

Output to Supply Short

GND, or OUTB to VDD or GND

RFAULT

Circuit Detection Threshold

Short Circuit

Ω (min)

Open Circuit

7.5

Ω (max)

Short between both OUTA and OUTB to

Output to Supply Short

VDD or GND

RFAULT

Circuit Detection Threshold

Short Circuit

Ω (min)

Open Circuit

Ω (max)

Open Circuit Detection

100

Ω (min)

ROPEN

Open circuit between OUTA and OUTB

Threshold

200

Ω (max)

Output to Output Short

Ω (min)

RSHT

Short circuit between OUTA and OUTB

Circuit Detection Threshold

Ω (max)

ISHTCKT

Short Circuit Current Limit

1.43

TSD

170

°C

tDIAG

Diagnostic Time

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