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参数资料
| 型号： | MAX9770EUI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/22页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO 1.2W MONO D 28TSSOP |
| 标准包装： | 2,500 |
| 类型： | D 类 |
| 输出类型： | 1-通道（单声道），带立体声耳机 |
| 在某负载时最大输出功率 x 通道数量： | 1.2W x 1 @ 8 欧姆; 80mW x 2 @ 16 欧姆 |
| 电源电压： | 2.5 V ~ 5.5 V |
| 特点： | 消除爆音，输入多路复用器，静音，短路和热保护，关机 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 28-TSSOP |
| 封装/外壳： | 28-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 带卷 (TR) |
MAX9770
1.2W, Low-EMI, Filterless, Mono Class D Amplifier
with Stereo DirectDrive Headphone Amplifiers
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(VDD = PVDD = CPVDD = 3.3V, GND = PGND = CPGND = 0V, SHDN = 3.3V, C1 = C2 = 1F, CBIAS = 0.047F, SYNC = GND, RL =
∞,
speaker load connected between OUT+ and OUT-, headphone load connected between HPOUT_ and GND, TA = TMIN to TMAX,
unless otherwise noted. Typical values are at TA = +25°C.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
RL = 8
Ω, POUT = 300mW, f = 1kHz
0.025
RL = 4
Ω, POUT = 300mW, f = 1kHz
0.03
Total Harmonic Distortion Plus
Noise
THD+N
RL = 8
Ω, POUT = 500mW,
f = 1kHz
0.1
%
Signal-to-Noise Ratio
SNR
RL = 8
Ω, VOUT = 2VRMS, A-weighted
85.9
dB
SYNC = GND
980
1100
1220
SYNC = unconnected
1280
1450
1620
Output Switching Frequency
fS
SYNC = VDD
1220
±120kHz
kHz
SYNC Frequency Lock Range
800
2000
kHz
Efficiency
η
PO = 1000mW, f = 1kHz
85
%
GAIN1 = 0, GAIN2 = 0
6
GAIN1 = 0, GAIN2 = 1
3
GAIN1 = 1, GAIN2 = 0
9
Gain (MAX9770)
AV
GAIN1 = 1, GAIN2 = 1
0
dB
Gain Accuracy
±5%
Speaker Path Off-Isolation
HPS = VDD, headphone amplifier active,
f = 1kHz
102
dB
Into shutdown
-76
Out of shutdown
-55
Into mute
-83
Click-and-Pop Level
KCP
Peak voltage,
A-weighted, 32
samples per second
(Notes 4, 5)
Out of mute
-69
dB
HEADPHONE AMPLIFIER (GAIN1 = 1, GAIN2 = 0, HPS = VDD)
Output Offset Voltage
VOS
±5
±10
mV
VDD = 2.5V to 5.5V, TA = +25°C
65
76
VRIPPLE = 200mVP-P, f = 217Hz
75
VRIPPLE = 200mVP-P, f = 1kHz
82
Power-Supply Rejection Ratio
PSRR
(Note 4)
VRIPPLE = 200mVP-P, f = 20kHz
56
dB
RL = 32
Ω
40
55
VDD = 3.3V
RL = 16
Ω
40
RL = 32
Ω
60
Output Power
POUT
TA = +25°C,
f = 1kHz,
THD+N = 1%
(Note 3)
VDD = 5V
RL = 16
Ω
80
mW
RL = 32
Ω, POUT = 50mW, f = 1kHz
0.015
Total Harmonic Distortion Plus
Noise
THD+N
RL = 16
Ω, POUT = 35mW, f = 1kHz
0.03
%
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