60mW, DirectDrive, Stereo Headphone

Amplifiers with Shutdown

2

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

VDD to PGND............................................................-0.3V to +6V

PVSS to SVSS .........................................................-0.3V to +0.3V

PGND to SGND .....................................................-0.3V to +0.3V

C1P to PGND..............................................-0.3V to (VDD + 0.3V)

C1N to PGND............................................(PVSS - 0.3V) to +0.3V

PVSS and SVSS to PGND..........................................-6V to +0.3V

IN_ to SGND (MAX9728A)..........................-0.3V to (VDD + 0.3V)

IN_ to SGND (MAX9728B) .............(SVSS - 0.3V) to (VDD + 0.3V)

OUT_ to SVSS (Note 1) ....-0.3V to Min (VDD - SVSS + 0.3V, +9V)

OUT_ to VDD (Note 2) ......+0.3V to Max (SVSS - VDD - 0.3V, -9V)

SHDN to _GND.........................................................-0.3V to +6V

OUT_ Short Circuit to SGND ......................................Continuous

Short Circuit between OUTL and OUTR ....................Continuous

Continuous Input Current into PVSS..................................260mA

Continuous Input Current (any other pin) .........................±20mA

Continuous Power Dissipation (TA = +70°C)

12-Pin TQFN (derate 14.7mW/°C above +70°C) .........1177mW

14-Pin TSSOP (derate 9.1mW/°C above +70°C) ...........727mW

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Junction Temperature ......................................................+150°C

Lead Temperature (soldering, 10s) .................................+300°C

ELECTRICAL CHARACTERISTICS

(VDD = 5V, PGND = SGND, SHDN = 5V, C1 = C2 = 1µF, RL =

∞, resistive load reference to ground; for MAX9728A gain = -1.5V/V

(RIN = 20k

Ω, RF = 30kΩ); for MAX9728B gain = -1.5V/V (internally set), TA = -40°C to +85°C, unless otherwise noted. Typical values

are at TA = +25°C, unless otherwise noted.) (Note 3)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

GENERAL

Supply Voltage Range

VDD

4.5

5.5

V

Quiescent Current

ICC

3.5

5.5

mA

Shutdown Current

ISHDN

SHDN = SGND = PGND

< 0.1

1

µA

Shutdown to Full Operation

tSON

180

µs

Input Impedance

RIN

MAX9728B, measured at IN_

15

19

25

k

Ω

Output Offset Voltage

VOS

±1.5

±10

mV

VDD = 4.5V to 5.5V

86

f = 1kHz, 100mVP-P

80

Power-Supply Rejection Ratio

PSRR

f = 20kHz, 100mVP-P

65

dB

RL = 32

Ω, THD+N = 1%

30

63

Output Power

POUT

RL = 16

Ω, THD+N = 1%

42

mW

Voltage Gain

AV

MAX9728B (Note 4)

-1.52

-1.5

-1.48

V/V

Channel-to-Channel Gain

Tracking

MAX9728B

±0.15

%

RL = 1k

Ω, VOUT = 2VRMS, fIN = 1kHz

0.003

RL = 32

Ω, POUT = 50mW, fIN = 1kHz

0.02

Total Harmonic Distortion Plus

Noise

THD+N

RL = 16

Ω, POUT = 35mW, fIN = 1kHz

0.04

%

Note 1: OUTR and OUTL should be limited to no more than 9V above SVSS, or above VDD + 0.3V, whichever limits first.

Note 2: OUTR and OUTL should be limited to no more than 9V below VDD, or below SVSS - 0.3V, whichever limits first.