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參數(shù)資料
| 型號： | MAX9638AVB+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 2/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP GP R-R 1.5MHZ 10UTQFN |
| 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)： | 2 |
| 輸出類型： | 滿擺幅 |
| 轉換速率： | 0.9 V/µs |
| 增益帶寬積： | 1.5MHz |
| 電壓 - 輸入偏移： | 10µV |
| 電流 - 電源： | 36µA |
| 電流 - 輸出 / 通道： | 55mA |
| 電壓 - 電源，單路/雙路(±)： | 2.1 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-UFQFN |
| 供應商設備封裝： | 10-UTQFN（1.4x1.8） |
| 包裝： | 帶卷 (TR) |
3V/5V Low-Power, Low-Noise, CMOS,
Rail-to-Rail I/O Op Amps
MAX9636/MAX9637/MAX9638
10
Driving Capacitive Loads
The ICs have a high tolerance for capacitive loads.
In unity-gain configuration, the op amps can typically
drive up to 300pF pure capacitive load. Increasing the
gain enhances the amplifier’s ability to drive greater
capacitive loads. In unity-gain configurations, capacitive
load drive can be improved by inserting a small (5I to
30I) isolation resistor, RISO, in series with the output,
as shown in Figure 1. This significantly reduces ringing
while maintaining DC performance for purely capaci-
tive loads. However, if the load also has a resistive
component then a voltage-divider is created, introduc-
ing a direct current (DC) error at the output. The error
introduced is proportional to the ratio RISO/RL, which
is usually negligible in most cases. Applications that
cannot tolerate this slight DC error can use an alterna-
tive approach of providing stability by placing a suitable
resistance in parallel with the capacitive load as shown
in Figure 2 (see the Typical Operating Characteristics
section for graphs of the stable operating region for
various capacitive loads vs. resistive loads). While this
approach of adding a resistor parallel to the load does
not introduce DC error, it nevertheless reduces the out-
put swing proportionally.
High-Impedance
Sensor Front-Ends
The ICs interface to both current-output sensors, such
as photodiodes (Figure 3), and high-impedance voltage
sources, such as piezoelectric sensors. For current-
output sensors, a transimpedance amplifier is the most
noise-efficient method for converting the input signal to
a voltage. High-value feedback resistors are commonly
chosen to create large gains, while feedback capacitors
help stabilize the amplifier by cancelling any poles intro-
duced in the feedback function by the highly capacitive
sensor or cabling. A combination of low-current noise
and low-voltage noise is important for these applications.
Take care to calibrate out photodiode dark current if DC
accuracy is important. The high bandwidth and slew
rate also allows AC signal processing in certain medical
photodiode sensor applications such as pulse oximetry.
For voltage-output sensors, a noninverting amplifier is
typically used to buffer and/or apply a small gain to the
input voltage signal. Due to the extremely high imped-
ance of the sensor output, a low input bias current with
minimal temperature variation is very important for these
applications.
Figure 3. The MAX9636 in a Sensor Preamp Configuration
Figure 1. Using a Series Resistor to Isolate the Capacitive
Load from the Op Amp
Figure 2. Using a Parallel Resistor to Degenerate the Effect of
the Capacitive Load and Increase Stability
SIGNAL
CONDITIONING/
FILTERS
PHOTODIODE
IN-
IN+
VDD
OUT
REF
ADC
MAX1286
MAX9636
-
+
RL
RL + RISO
AV =
RISO
≈ 1V/V
CL
MAX9636/
MAX9637/
MAX9638
-
+
RP
RL
CL
MAX9636/
MAX9637/
MAX9638
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9638EVKIT# | 功能描述:放大器 IC 開發(fā)工具 RoHS:否 制造商:International Rectifier 產(chǎn)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 |
| MAX9638EVKIT+ | 功能描述:放大器 IC 開發(fā)工具 MAX9638 Eval Kit RoHS:否 制造商:International Rectifier 產(chǎn)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 |
| MAX9639EVKIT+ | 功能描述:磁場傳感器模塊 RoHS:否 制造商:Olimex Ltd. 產(chǎn)品類型:3-Axis Magnetometer Module 接口類型:UEXT Connector 電源電流: 最大工作溫度: 尺寸:29 mm x 18 mm |
| MAX963ESD | 功能描述:校驗器 IC Dual Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MAX963ESD+ | 功能描述:校驗器 IC Dual Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
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