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参数资料
| 型号： | MAX4239ASA |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 运动控制电子 |
| 英文描述： | Ultra-Low Offset/Drift, Low-Noise, Precision SOT23 Amplifiers |
| 中文描述： | OP-AMP, 3.5 uV OFFSET-MAX, 6.5 MHz BAND WIDTH, PDSO8 |
| 封装： | PLASTIC, 0.150 INCH, MS-012AA, SOIC-8 |
| 文件页数： | 8/10页 |
| 文件大小： | 363K |
| 代理商： | MAX4239ASA |
M
Output Overload Recovery
Autozeroing amplifiers typically require a substantial
amount of time to recover from an output overload. This
is due to the time it takes for the null amplifier to correct
the main amplifier to a valid output. The MAX4238/
MAX4239 require only 3.3ms to recover from an output
overload (see
Electrical Characteristics
and
Typical
Operating Characteristics
).
Shutdown
The MAX4238/MAX4239 feature a low-power (0.1μA)
shutdown mode. When
SHDN
is pulled low, the clock
stops and the device output enters a high-impedance
state. Connect
SHDN
to V
CC
for normal operation.
Applications Information
Minimum and Maximum Gain
Configurations
The MAX4238 is a unity-gain stable amplifier with a gain-
bandwidth product (GBWP) of 1MHz. The MAX4239 is
decompensated for a GBWP of 6.5MHz and is stable with
a gain of 10V/V. Unlike conventional operational ampli-
fiers, the MAX4238/MAX4239 have a maximum gain
specification. To maintain stability, set the gain of the
MAX4238 between A
V
= 1000V/V to 1V/V, and set the
gain of the MAX4239 between A
V
= 6700V/V and 10V/V.
ADC Buffer Amplifier
The low offset, fast settling time, and 1/f noise cancella-
tion of the MAX4238/MAX4239 make these devices
ideal for ADC buffers. The MAX4238/MAX4239 are well
suited for low-speed, high-accuracy applications such
as strain gauges (see
Typical Application Circuit
).
Error Budget Example
When using the MAX4238/MAX4239 as an ADC buffer,
the temperature drift should be taken into account when
determining the maximum input signal. With a typical off-
set drift of 10nV/
°
C, the drift over a 10
°
C range is 100nV.
Setting this equal to 1/2LSB in a 16-bit system yields a
full-scale range of 13mV. With a single 2.7V supply, an
acceptable closed-loop gain is A
V
= 200. This provides
sufficient gain while maintaining headroom.
Chip Information
TRANSISTOR COUNT: 821
PROCESS: BiCMOS
Ultra-Low Offset/Drift, Low-Noise,
Precision SOT23 Amplifiers
8
_______________________________________________________________________________________
OUT
N.C.
GND
1
2
8
7
N.C.
V
CC
IN-
IN+
SHDN
SO
TOP VIEW
3
4
6
5
MAX4238/
MAX4239
MAX4238/
MAX4239
GND
IN-
IN+
1
6
V
CC
5
SHDN
OUT
SOT23
2
3
4
Pin Configurations
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PDF描述 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4239ASA+ | 功能描述:精密放大器 Low Offset/Drift Precision RoHS:否 制造商:Maxim Integrated 每芯片的通道数量: 输入补偿电压:0.25 mV at +/- 5 V 输入电压范围（最大值）: 安装风格: 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX4239ASA+T | 功能描述:精密放大器 Low Offset/Drift Precision RoHS:否 制造商:Maxim Integrated 每芯片的通道数量: 输入补偿电压:0.25 mV at +/- 5 V 输入电压范围（最大值）: 安装风格: 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX4239ASA-T | 功能描述:精密放大器 Low Offset/Drift Precision RoHS:否 制造商:Maxim Integrated 每芯片的通道数量: 输入补偿电压:0.25 mV at +/- 5 V 输入电压范围（最大值）: 安装风格: 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX4239ATT+ | 制造商:Maxim Integrated Products 功能描述:OP AMP SGL GP R-R O/P 5.5V 6TDFN EP - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| MAX4239ATT+T | 功能描述:精密放大器 Low Offset/Drift Precision RoHS:否 制造商:Maxim Integrated 每芯片的通道数量: 输入补偿电压:0.25 mV at +/- 5 V 输入电压范围（最大值）: 安装风格: 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
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