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參數(shù)資料
| 型號： | MAX9770EUI+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 17/22頁 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO 1.2W MONO D 28TSSOP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | D 類 |
| 輸出類型： | 1-通道（單聲道），帶立體聲耳機 |
| 在某負載時最大輸出功率 x 通道數(shù)量： | 1.2W x 1 @ 8 歐姆; 80mW x 2 @ 16 歐姆 |
| 電源電壓： | 2.5 V ~ 5.5 V |
| 特點： | 消除爆音，輸入多路復(fù)用器，靜音，短路和熱保護，關(guān)機 |
| 安裝類型： | 表面貼裝 |
| 供應(yīng)商設(shè)備封裝： | 28-TSSOP |
| 封裝/外殼： | 28-TSSOP（0.173"，4.40mm 寬） |
| 包裝： | 帶卷 (TR) |
MAX9770
1.2W, Low-EMI, Filterless, Mono Class D Amplifier
with Stereo DirectDrive Headphone Amplifiers
4
_______________________________________________________________________________________
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
Signal-to-Noise Ratio
SNR
RL = 32
Ω, VOUT = 300mVRMS,
BW = 22Hz to 22kHz
101
dB
Crosstalk
Between channels, f = 1kHz,
VIN = 200mVP-P
80
dB
Headphone Off-Isolation
HPS = GND, speaker amplifier active,
f = 1kHz
96
dB
Into shutdown
-58
Out of shutdown
-53
Into mute
-92
Click-and-Pop Level
KCP
Peak voltage, A-
weighted, 32
samples per second
(Notes 4, 5)
Out of mute
-73
dBV
Capacitive-Load Drive
CL
1000
pF
GAIN1 = 0, GAIN2 = 0
7
GAIN1 = 0, GAIN2 = 1
4
GAIN1 = 1, GAIN2 = 0
-2
Gain
AV
GAIN1 = 1, GAIN2 = 1
1
dB
Gain Accuracy
±2.5
%
ESD Protection
HPOUTR, HPOUTL, IEC Air Discharge
±8kV
DIGITAL INPUTS (SHDN, SYNC, HPS, GAIN_, SEL_)
Input Voltage High
VIH
2V
Input Voltage Low
VIL
0.8
V
SYNC input
±25
Input Leakage Current (Note 6)
All other logic inputs
±1
A
HPS Input Current
HPS = GND
-10
A
Note 1: All devices are 100% production tested at +25°C. All temperature limits are guaranteed by design.
Note 2: Speaker amplifier testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For
RL = 4Ω, L = 47H. For RL = 8Ω, L = 68H.
Note 3: Guaranteed by design, not production tested.
Note 4: Inputs AC-coupled to GND.
Note 5: Speaker mode testing performed with an 8
Ω resistive load in series with a 68H inductive load connected across BTL output.
Headphone mode testing performed with a 32
Ω resistive load connected to GND. Mode transitions are controlled by SHDN. KCP
level is calculated as: 20 x log [(peak voltage during mode transition, no input signal)/(peak voltage under normal operation at
rated power level)]. Units are expressed in dB. Measured with VDD = 5V.
Note 6: SYNC has a 200k
Ω resistor to VREF = 1.25V.
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