參數(shù)資料
型號(hào)： MAX4168EPD
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 運(yùn)動(dòng)控制電子
英文描述： Voltage-Feedback Operational Amplifier
中文描述： DUAL OP-AMP, 1000 uV OFFSET-MAX, 5 MHz BAND WIDTH, PDIP14
封裝： PLASTIC, DIP-14
文件頁(yè)數(shù)： 10/16頁(yè)
文件大小： 230K
代理商： MAX4168EPD
M
High-Output-Drive, Precision, Low-Power, Single-
Supply, Rail-to-Rail I/O Op Amps with Shutdown
10
______________________________________________________________________________________
S ingle-S upply S peaker Driver
The MAX4165/MAX4166 can be used as a single-sup-
ply speaker driver, as shown in the Typical Operating
Circuit Capacitor C1 is used for blocking DC (a 0.1μF
ceramic capacitor can be used). When choosing resis-
tors R3 and R4, take into consideration the input bias
current as well as how much supply current can be tol-
erated. Choose resistors R1 and R2 according to the
amount of gain and current desired. Capacitor C3
ensures unity gain for DC. A 10μF electrolytic capacitor
is suitable for most applications. The coupling capaci-
tor C2 sets a low-frequency pole and is fairly large in
value. For a 32
load, a 100μF coupling capacitor
gives a low-frequency pole at 50Hz. The low-frequency
pole can be set according to the following equation:
= 1 / 2
π
(R
L
C2)
Bridge Amplifier
The circuit shown in Figure 3 uses a dual MAX4167/
MAX4168 to implement a 3V, 200mW amplifier suitable
for use in size-constrained applications. This configura-
tion eliminates the need for the large coupling capaci-
tor required by the single op-amp speaker driver when
single-supply operation is a must. Voltage gain is set to
+10V/V; however, it can be changed by adjusting the
900k
resistor value. DC voltage at the speaker is limit-
ed to 10mV. The 47
and 0.1μF capacitors across the
speaker maintain a low impedance at the load as fre-
quency increases.
Rail-to-Rail Input S tage
Devices in the MAX4165–MAX4169 family of high-out-
put-current amplifiers have rail-to-rail input and output
stages designed for low-voltage, single-supply opera-
tion. The input stage consists of separate NPN and
PNP differential stages that combine to provide an
input common-mode range that extends 0.25V beyond
the supply rails. The PNP stage is active for input volt-
ages close to the negative rail, and the NPN stage is
active for input voltages near the positive rail. The
switchover transition region, which occurs near V
CC
/ 2,
has been extended to minimize the slight degradation
in common-mode rejection ratio caused by mismatch of
the input pairs.
V
CC
= +3V
900k
V
CC
= +3V
V
CC
= +3V
47
4.7k
4.7k
0.1
μ
F
1
μ
F
0.1
μ
F
INPUT
0.25Vp-p
32
100k
100k
100k
100k
100k
100k
1/2 MAX4167
1/2 MAX4168
1/2 MAX4167
1/2 MAX4168
Figure 3. Dual MAX4167/MAX4168 Bridge Amplifier for
200mW at 3V
R3
R3 = R1 R2
R1
R2
MAX4165
MAX4166
MAX4167
MAX4168
MAX4169
Figure 4. Reducing Offset Error Due to Bias Current
(Noninverting)
R3
R3 = R1 R2
R1
R2
MAX4165
MAX4166
MAX4167
MAX4168
MAX4169
Figure 5. Reducing Offset Error Due to Bias Current (Inverting)
相關(guān)PDF資料
PDF描述
MAX4168ESD Voltage-Feedback Operational Amplifier
MAX4168EUB Voltage-Feedback Operational Amplifier
MAX4169EPD Voltage-Feedback Operational Amplifier
MAX4169ESD Voltage-Feedback Operational Amplifier
MAX4166EUA High-Output-Drive, Precision, Low-Power, Single- Supply, Rail-to-Rail I/O Op Amps with Shutdown
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX4168EPD+ 功能描述:運(yùn)算放大器 - 運(yùn)放 High-Output-Drive Supply Rail-Rail RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
MAX4168ESD 功能描述:運(yùn)算放大器 - 運(yùn)放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
MAX4168ESD+ 功能描述:運(yùn)算放大器 - 運(yùn)放 High-Output-Drive Supply Rail-Rail RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
MAX4168ESD+T 功能描述:運(yùn)算放大器 - 運(yùn)放 High-Output-Drive Supply Rail-Rail RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
MAX4168ESD-T 功能描述:運(yùn)算放大器 - 運(yùn)放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
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