LM48821, LM48821TLEVAL

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SNAS354A – JUNE 2007 – REVISED MAY 2013

Audio Amplifier Electrical Characteristics VDD = 3V

(1)

(continued)

The following specifications apply for VDD = 3V, RL = 16Ω, AV = 0dB, unless otherwise specified. Limits apply for TA = 25°C.

LM48821

Units

Symbol

Parameter

Conditions

Typical (2)

Limits

(Limits)

(3) (4)

THD+N = 1% (max); fIN = 1kHz,

52

43

mW (min)

RL = 16Ω, per channel

THD+N = 1% (max); fIN = 1kHz,

53

45

mW (min)

RL = 32Ω, per channel

POUT

Output Power

THD+N = 1% (max); fIN = 1kHz,

93

80

mW (min)

RL = 16Ω, single channel driven

THD+N = 1% (max); fIN = 1kHz,

79

mW

RL = 32Ω, single channel driven

POUT = 50mW, f = 1kHz

0.022

%

RL = 16Ω, single channel

Total Harmonic Distortion +

THD+N

Noise

POUT = 50mW, f = 1kHz

0.011

%

RL = 32Ω, single channel

VRIPPLE = 200mVP-P, input referred

f = 217Hz

82

65

dB (min)

PSRR

Power Supply Rejection Ratio

f = 1kHz

80

dB

f = 20kHz

55

dB

VRIPPLE = 200mVp-p, Input referred

CMRR

Common Mode Rejection Ratio

65

dB

f = 2kHz

RL = 32Ω, POUT = 20mW,

SNR

Signal-to-Noise-Ratio

100

dB

f = 1kHz, BW = 20Hz to 22kHz

TWU

Charge Pump Wake-Up Time

400

μs

RL = 16Ω, POUT = 1.6mW,

XTALK

Crosstalk

82

dB

f = 1kHz, A-weighted filter

ZOUT

Output Impedance

Right and Left Enable bits set to 0

41

k

Ω

Control Interface Electrical Characteristics

(1)

The following specifications apply for 1.8V

≤ I

2CV

DD ≤ 4.0V, unless otherwise specified. Limits apply for TA = 25°C. See

Figure 56.

LM48821

Units

Symbol

Parameter

Conditions

(Limits)

Typical (2)

Limits (3) (4)

t1

SCL period

2.5

μs (min)

t2

SDA Setup Time

100

ns (min)

t3

SDA Stable Time

0

ns (min)

t4

Start Condition Time

100

ns (min)

t5

Stop Condition Time

100

ns (min)

VIH

Logic High Input Threshold

0.7 x I2CVDD

V (min)

VIL

Logic Low Input Threshold

0.3 x I2CVDD

V (max)

(1)

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

(2)

Typicals are measured at +25°C and represent the parametric norm.

(3)

Limits are specified to AOQL (Average Outgoing Quality Level).

(4)

Data sheet min and /max specification limits are specified by design, test, or statistical analysis.

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