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参数资料
| 型号： | MAX9723DEVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/25页 |
| 文件大小： | 0K |
| 描述： | EVALUATION KIT FOR MAX9723 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 系列： | DirectDrive® |
| 放大器类型： | AB 类 |
| 输出类型： | 耳机，2-通道（立体声） |
| 在某负载时最大输出功率 x 通道数量： | 60mW x 2 @ 16 欧姆 |
| 电源电压： | 1.8 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 板类型： | 完全填充 |
| 已用 IC / 零件： | MAX9723D |
| 已供物品： | 板 |
| 相关产品： | MAX9723DETE+T-ND - IC AMP AUDIO .06W STER AB 16TQFN MAX9723DEBE+T-ND - IC AMP AUDIO .06W STER AB 16UCSP MAX9723DETE+-ND - IC AMP AUDIO .06W STER AB 16TQFN |
interest are not attenuated. For a typical application, set
fPOLE equal to or below 20Hz.
Figure 13 shows the frequency response of the circuit
in Figure 12. With RA = 47k
Ω, RB = 22kΩ, and CA =
0.33F, the passband gain is set to 8.8dB.
Layout and Grounding
Proper layout and grounding are essential for optimum
performance. Connect PGND and SGND together at a
single point on the PC board. Connect PVSS to SVSS
and bypass with a 1F capacitor to PGND. Bypass VDD
to PGND with a 1F capacitor. Place the power-supply
bypass capacitor and the charge-pump capacitors as
close to the MAX9723 as possible. Route PGND and all
traces that carry switching transients away from SGND
and the audio signal path. Route digital signal traces
away from the audio signal path. Make traces perpen-
dicular to each other when routing digital signals over
or under audio signals.
The thin QFN package features an exposed paddle
that improves thermal efficiency. Ensure that the
exposed paddle is electrically isolated from PGND,
SGND, and VDD. Connect the exposed paddle to
SVSS when the board layout dictates that the
exposed paddle cannot be left floating.
CA
fRA RB
POLE
()
=
×
1
2
π
MAX9723
Stereo DirectDrive Headphone Amplifier
with BassMax, Volume Control, and I2C
______________________________________________________________________________________
19
CA
RB
RA
R
OUT_
BB_
AUDIO
INPUT
MAX9723
BassMax
ENABLE
Figure 12. Using BassMax to Increase MAX9723’s Maximum
Gain
R2 (k
Ω)AV GAIN (dB)
39
20.6
33
15.1
27
11.3
22
8.8
15
5.7
10
3.7
Table 12. BassMax Gain Examples
(R1 = 47k
Ω)
C3 (nF)
fPOLE (Hz)
fZERO (Hz)
100
38
106
82
47
130
68
56
156
56
68
190
47
81
230
22
174
490
10
384
1060
Table 13. BassMax Pole and Zero
Examples for a Gain Boost of 8.8dB
(R1 = 47k
Ω, R2 = 22kΩ)
FREQUENCY RESPONSE OF FIGURE 12
FREQUENCY (Hz)
A
V(dB)
1k
100
10
1
2
3
4
5
6
7
8
9
10
0
0.1
10k
MAX9723A
CMD REGISTER
CODE = 0xFF
RA = 47k
Ω
RB = 22k
Ω
CA = 0.33
μF
Figure 13. Increasing the Maximum Gain Using BassMax
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9723DEVKIT+ | 功能描述:放大器 IC 开发工具 MAX9723A/B/C/D Eval Kit RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| MAX9724AEBC+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP HDPH 2CH STEREO 0.045W CLS-AB 12UCSP - Rail/Tube |
| MAX9724AEBC+G45 | 制造商:Maxim Integrated Products 功能描述:60MW DIRECTDRIVE STEREO HEADPHONE - Tape and Reel |
| MAX9724AEBC+T | 制造商:Maxim Integrated Products 功能描述:AUD AMP HDPH 2CH STEREO 0.045W CLS-AB 12UCSP - Tape and Reel |
| MAX9724AEBC+TG45 | 功能描述:音频放大器 60mW DirectDrive Headphone Amplifier RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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