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参数资料
| 型号： | MAX9779ETI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/19页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 2.6W AB 28TQFN |
| 标准包装： | 2,500 |
| 系列： | DirectDrive® |
| 类型： | AB 类 |
| 输出类型： | 2-通道（立体声）带立体声耳机 |
| 在某负载时最大输出功率 x 通道数量： | 2.6W x 2 @ 3 欧姆; 110mW x 2 @ 16 欧姆 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 特点： | 消除爆音，短路保护和热保护，关闭 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
MAX9779
2.6W Stereo Audio Power Amplifier and
DirectDrive Headphone Amplifier
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(VDD = PVDD = CPVDD = HPVDD = 5V, GND = PGND = CPGND = 0V, SHDN = VDD, CBIAS = 1F, C1 = C2 = 1F, speaker load
terminated between OUT_+ and OUT_-, headphone load terminated between HPOUT_ and GND, GAIN1 = GAIN2 = 0V, TA = TMIN to
TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
RL = 8
0.9
1.4
RL = 4
2.3
Output Power (Note 4)
POUT
THD+N = 1%,
f = 1kHz,
TA = +25°C
RL = 3
2.6
W
RL = 8
, POUT = 500mW, f = 1kHz
0.01
Total Harmonic Distortion
Plus Noise
THD+N
RL = 4
, POUT = 1W, f = 1kHz
0.02
%
Signal-to-Noise Ratio
SNR
RL = 8
, POUT = 500mW,
BW = 22Hz to 22kHz
90
dB
Noise
Vn
BW = 22Hz to 22kHz, A-weighted
80
VRMS
Capacitive-Load Drive
CL
No sustained oscillations
200
pF
Crosstalk
L to R, R to L, f = 10kHz
75
dB
Slew Rate
SR
1.4
V/s
GAIN1 = 0, GAIN2 = 0
15
GAIN1 = 1, GAIN2 = 0
16.5
GAIN1 = 0, GAIN2 = 1
18
Gain (Maximum Volume Setting)
AVMAX(SPKR)
GAIN1 = 1, GAIN2 = 1
19.5
dB
HEADPHONE AMPLIFIER (HPS = VDD)
Output Offset Voltage
VOS
TA = +25°C
±2
±7mV
HPVDD = 3V to 5.5V, TA = +25°C
60
75
f = 1kHz, VRIPPLE = 200mVP-P
73
Power-Supply Rejection Ratio
(Note 3)
PSRR
f = 10kHz, VRIPPLE = 200mVP-P
63
dB
RL = 32
40
50
Output Power
POUT
THD+N = 1%,
f = 1kHz, TA = +25°C
RL = 16
110
mW
RL = 32
, POUT = 20mW, f = 1kHz
0.007
Total Harmonic Distortion
Plus Noise
THD+N
RL = 16
, POUT = 75mW, f = 1kHz
0.03
%
Signal-to-Noise Ratio
SNR
RL = 32
, POUT = 50mW,
BW = 22Hz to 22kHz
95
dB
Noise
Vn
BW = 22Hz to 22kHz
12
VRMS
Capacitive-Load Drive
CL
No sustained oscillations
200
pF
Crosstalk
L to R, R to L, f = 10kHz
88
Off-Isolation
Any unselected input to any active input,
f = 10kHz, input referred
74
dB
Slew Rate
SR
0.4
V/s
ESD
IEC air discharge
±8
kV
GAIN2 = 0, GAIN1 = X
0
Gain
AV
GAIN2 = 1, GAIN1 = X
3
dB
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