Maxim MAX9778 用户手册

(V

DD

= PV

DD

= 5.0V, GND = PGND = 0V, V

SHDN

= 5V, C

BIAS

= 1µF, R

IN

= R

F

= 15kΩ, R

L

= ∞. T

A

= T

MIN

to T

MAX

, unless otherwise

noted. Typical values are at T

A

= +25°C.) (Note 1)

V

DD

 = 4.5V to 5.5V

75

106

f = 1kHz, V

RIPPLE

 = 200mV

P-P

88

Power-Supply Rejection Ratio
(Note 2)

PSRR

f = 20kHz, V

RIPPLE

 = 200mV

P-P

76

dB

R

L

 = 32

Ω

88

Output Power

P

OUT

f

IN

 = 1kHz, THD+N <

1%, T

A

 = +25°C

R

L

 = 16

Ω

200

mW

P

OUT

 = 60mW,

R

L

 = 32

Ω

0.002

Total Harmonic Distortion Plus
Noise

THD+N

f

IN

 = 1kHz,

BW = 22Hz to 22kHz

P

OUT

 = 125mW,

R

L

 = 16

Ω

0.002

%

Signal-to-Noise Ratio

SNR

R

L

 = 32

Ω, BW = 22Hz to 22kHz,

V

OUT

 = 1V

RMS

92

dB

Slew Rate

SR

1.8

V/µs

Maximum Capacitive Load Drive

C

L

No sustained oscillations

2

nF

Crosstalk

f

IN

 = 10kHz

78

dB

BIAS Voltage

V

BIAS

2.35

2.5

2.65

V

Output Resistance

R

BIAS

50

k

Ω

SHDN, HPS_EN, GAINA/B, IN1111/2)

Input-Voltage High

V

IH

2

V

Input-Voltage Low

V

IL

0.8

V

Input Leakage Current

I

IN

±1

µA

Input-Voltage High

V

IH

0.9 x

V

DD

V

Input-Voltage Low

V

IL

0.7 x

V

DD

V

Input Leakage Current

I

IN

±1

µA

Into shutdown

-70

Click/Pop Level

K

CP

Peak voltage, A-weighted,
32 samples per second
(Notes 2, 4)

Out of shutdown

-52

dBV