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參數資料
| 型號： | MAX9723DEVKIT+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 11/25頁 |
| 文件大小： | 0K |
| 描述： | EVALUATION KIT FOR MAX9723 |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 1 |
| 系列： | DirectDrive® |
| 放大器類型： | AB 類 |
| 輸出類型： | 耳機，2-通道（立體聲） |
| 在某負載時最大輸出功率 x 通道數量： | 60mW x 2 @ 16 歐姆 |
| 電源電壓： | 1.8 V ~ 3.6 V |
| 工作溫度： | -40°C ~ 85°C |
| 板類型： | 完全填充 |
| 已用 IC / 零件： | MAX9723D |
| 已供物品： | 板 |
| 相關產品： | 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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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX9723DEVKIT+ | 功能描述:放大器 IC 開發工具 MAX9723A/B/C/D Eval Kit RoHS:否 制造商:International Rectifier 產品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓: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:音頻放大器 60mW DirectDrive Headphone Amplifier RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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