MAX9877 데이터 시트보기 (PDF) - Maxim Integrated
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MAX9877
Maxim Integrated
MAX9877 Datasheet PDF : 30 Pages
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Low RF Susceptibility, Mono Audio
Subsystem with DirectDrive Headphone Amplifier
ELECTRICAL CHARACTERISTICS (continued)
(VDD = PVDD = 3.7V, VGND = VPGND = 0V. Single-ended inputs, preamp gain = 0dB, volume controls = 0dB, OSC = 00, BYPASS = 0,
SHDN = 1. Speaker loads (ZSPK) connected between OUT+ and OUT-. Headphone loads (RHP) connected from HPL or HPR to GND.
SDA and SCL pullup voltage = 3.3V. ZSPK = ∞, RHP = ∞. C1 = C2 = CBIAS = 1µF. TA = TMIN to TMAX, unless otherwise noted. Typical
values are at TA = +25°C.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Slew Rate
SR
0.35
V/µs
Capacitive Drive
Crosstalk
CL
100
pF
HPL to HPR, HPR to HPL, f = 20Hz to 20kHz
65
dB
Charge-Pump Frequency
Spread-spectrum modulation mode,
OSC = 00
Fixed-frequency mode, OSC = 01
Fixed-frequency mode, OSC = 10
588
±30
kHz
430
550
670
220
350
500
VOLUME CONTROL
Minimum Setting
_VOL = 1
-75
dB
Maximum Setting
_VOL = 31
0
dB
PGAIN_ = 00
0
Preamp Gain
Input A or B
PGAIN_ = 01
9
dB
Mute Attenuation
f = 1kHz, _VOL = 0
PGAIN_ = 10
Speaker
Headphone
20
100
dB
110
Zero-Crossing Detection Timeout
ZCD = 1
60
ms
ANALOG SWITCH
On-Resistance
RON
IRXIN_ = 20mA, RXIN_
= 0V and VDD,
BYPASS = 1
TA = +25°C
TA = TMIN to TMAX
1.6
4.5
Ω
5.2
Total Harmonic Distortion
VDIF = 2VP-P,
VCM = VDD/2,
f = 1kHz, BYPASS = 1,
TA = +25°C
Series resistance
is 9.1Ω per switch
No series resistors
0.05 0.25
%
0.3
Off-Isolation
BYPASS = 0, RXIN+ and RXIN- to GND =
50Ω, ZSPK = 8Ω + 68µH, f = 10kHz,
referred to speaker output signal
DIGITAL INPUTS
Input-Voltage High (SDA, SCL)
VH
1.4
Input-Voltage Low (SDA, SCL)
VL
Input-Voltage Low (BIAS)
VBL
Input Hysteresis (SDA, SCL)
VHYS
SDA, SCL Input Capacitance
CIN
Input Leakage Current
IIN
SDA, SCL; TA = +25°C
BIAS Pullup Current
IBIAS
DIGITAL OUTPUTS (SDA Open Drain)
Output Low Voltage SDA
VOL
ISINK = 3mA
Output Fall Time SDA
tOF
VH(MIN) to VL(MAX) bus capacitance = 10pF
to 400pF, ISINK = 3mA
88
dB
V
0.4
V
0.15
V
80
mV
4
pF
±1.0
µA
94
µA
0.4
V
250
ns
_______________________________________________________________________________________ 5
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