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參數(shù)資料
| 型號： | MAX4234AUD/V+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 15/15頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP I/O R-R 10MHZ 14-TSSOP |
| 其它有關文件： | Automotive Product Guide |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 4 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 10 V/µs |
| 增益帶寬積： | 10MHz |
| 電流 - 輸入偏壓： | 50pA |
| 電壓 - 輸入偏移： | 850µV |
| 電流 - 電源： | 1.2mA |
| 電流 - 輸出 / 通道： | 200mA |
| 電壓 - 電源，單路/雙路(±)： | 2.7 V ~ 5.5 V，±1.35 V ~ 2.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 14-TSSOP |
| 包裝： | 帶卷 (TR) |
For example, the circuit in Figure 1 has a package power
dissipation of 196mW:
PEAK
DD
DC
RMS
PEAK
RMS
DC
RMS
V
RMS (V
V
)
2
1.0V
3.6V 1.8V
2.507V
2
I
1.8V 1.0V / 32
II
32
22
78.4mA
+
=
+
=
+
=
+
=
where:
VDC = the DC component of the output voltage.
IDC = the DC component of the output current.
VPEAK = the highest positive excursion of the AC compo-
nent of the output voltage.
IPEAK = the highest positive excursion of the AC compo-
nent of the output current.
Therefore:
IC(DISS)
RMS RMS
P
= V
I
COS
= 196mW
θ
Adding a coupling capacitor improves the package power
dissipation because there is no DC current to the load, as
shown in Figure 2:
PEAK
RMS
PEAK
RMS
DC
RMS
V
2
1.0V 0.707V
2
I
1.0V / 32
I
0A
22
22.1mA
=
+
=
+
=
Therefore:
IC(DISS)
RMS RMS
P
= V
I
COS
= 15.6mW
θ
If the configuration in Figure 1 were used with all four of
the MAX4234 amplifiers, the absolute maximum power
dissipation rating of this package would be exceeded (see
the Absolute Maximum Ratings section).
60mW Single-Supply Stereo
Headphone Driver
Two MAX4230/MAX4231s can be used as a single-supply,
stereo headphone driver. The circuit shown in Figure 2 can
deliver 60mW per channel with 1% distortion from a single
5V supply.
The input capacitor (CIN), in conjunction with RIN, forms a
highpass filter that removes the DC bias from the incom-
ing signal. The -3dB point of the highpass filter is given by
3dB
IN IN
1
f
2R C
=
π
Figure 1. MAX4230/MAX4231 Used in Single-Supply Operation
Circuit Example
Figure 2. Circuit Example: Adding a Coupling Capacitor Greatly
Reduces Power Dissipation of its Package
3.6V
VIN = 2VP-P
R
C
32
R
MAX4230
MAX4231
RIGHT
AUDIO INPUT
LEFT
AUDIO INPUT
CIN
CIN
RIN
RIN
RF
COUT
VBIAS
HEADPHONE JACK
TO 32 STEREO
HEADSET
RF
MAX4230
COUT
MAX4230–MAX4234
High-Output-Drive, 10MHz, 10V/μs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
www.maximintegrated.com
Maxim Integrated │ 9
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