MAX9718(2003) Просмотр технического описания (PDF) - Maxim Integrated

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MAX9718
(Rev.:2003)

Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers

Maxim Integrated 

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

ELECTRICAL CHARACTERISTICS—3V Supply (continued)

(VCC = 3V, GND = 0, SHDN/SHDN = VCC (MAX9718/MAX9719), SHDM = GND (MAX9718), RIN = RF = 10kΩ (MAX971_A),

TA = +25°C. CBIAS = 0.1µF, no load. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1)

PARAMETER

Output Power

Total Harmonic Distortion Plus

Noise

Thermal-Shutdown Threshold

Thermal-Shutdown Hysteresis

Maximum Capacitive Drive

SYMBOL

CONDITIONS

POUT RL = 8Ω, THD+N = 1%, fIN = 1kHz (Note 4)

THD+N RL = 8Ω, fIN = 1kHz, POUT = 0.25W,

AV = 6dB

CLOAD Bridge-tied capacitance

MIN TYP MAX UNITS

475

mW

0.003

%

+160

°C

15

°C

500

pF

Power-Up/Enable from

Shutdown Time

tPU

10

ms

Shutdown Time

Turn-Off Transient

Crosstalk

tSHDN

VPOP

(Note 6)

MAX9719, fN = 1kHz

3

µs

40

mV

-85

dB

Note 1: All specifications are 100% tested at TA = +25°C. Specifications over temperature (TA = TMIN to TMAX) are guaranteed by

design, not production tested.

Note 2: Quiescent power-supply current is specified and tested with no load. Quiescent power-supply current depends on the offset

voltage when a practical load is connected to the amplifier. Guaranteed by design.

Note 3: Common-mode bias voltage is the voltage on BIAS and is nominally VCC/2.

Note 4: Output power is specified by a combination of a functional output current test and characterization analysis.

Note 5: Measurement bandwidth for THD+N is 22Hz to 22kHz.

Note 6: Peak voltage measured at power-on, power-off, into or out of SHDN. Bandwidth defined by A-weighted filters, inputs at AC

GND. VCC rise and fall times greater than or equal to 1ms.

Typical Operating Characteristics

(VCC = 5V, CBIAS = 0.1µF, THD+N measurement bandwidth = 22Hz to 22kHz, TA = +25°C, unless otherwise noted.)

TOTAL HARMONIC DISTORTION + NOISE

vs. FREQUENCY

10

VCC = 5V

RL = 4Ω

1 AV = 2

0.1

0.01

0.001

OUTPUT POWER = 1W

OUTPUT POWER = 50mW

TOTAL HARMONIC DISTORTION + NOISE

vs. FREQUENCY

10

VCC = 5V

RL = 4Ω

1 AV = 4

OUTPUT POWER = 1W

0.1

0.01

0.001

OUTPUT POWER = 200mW

TOTAL HARMONIC DISTORTION + NOISE

vs. FREQUENCY

10

VCC = 5V

RL = 8Ω

1 AV = 2

0.1

OUTPUT POWER = 750mW

0.01

0.001

OUTPUT POWER = 250mW

0.0001

10

0.0001

100

1k

10k

100k

10

FREQUENCY (Hz)

100

1k

10k

FREQUENCY (Hz)

0.0001

100k

10

100

1k

10k

100k

FREQUENCY (Hz)

4 _______________________________________________________________________________________

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