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| 型号： | ADA4830-2BCPZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 6/23页 |
| 文件大小： | 0K |
| 描述： | IC AMP BATT PROTECT DUAL 16LFCSP |
| 标准包装： | 1 |
| 放大器类型： | 差分 |
| 电路数： | 2 |
| 转换速率： | 220 V/µs |
| -3db带宽： | 84MHz |
| 电流 - 电源： | 6.8mA |
| 电流 - 输出 / 通道： | 125mA |
| 电压 - 电源，单路/双路(±)： | 2.9 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 16-LFCSP-WQ（3x3） |
| 包装： | 标准包装 |
| 其它名称： | ADA4830-2BCPZ-R7DKR |
Data Sheet
ADA4830-1/ADA4830-2
Rev. C | Page 13 of 22
THEORY OF OPERATION
CORE AMPLIFIER
At the core of the ADA4830-1 and ADA4830-2 are high speed,
rail-to-rail op amps that are built on a 0.35 m CMOS process.
Together with the core amplifier, the ADA4830-1 and ADA4830-2
combine four highly matched on-chip resistors into a difference
amplifier function. Common-mode range extension at its inputs
is achieved by employing a resistive attenuator. The closed-loop
differential to single-ended gain of the video channel is internally
fixed at 0.50 V/V (6 dB) to ensure compatibility with video
decoders whose input range is constrained to 1 V p-p or less.
The transfer function of the ADA4830-1 and ADA4830-2 is
REF
INN
INP
OUT
V
+
=
2
where:
VOUT is the voltage at the output pin, VOUT.
VINP and VINN are the input voltages at the INP and INN pins,
respectively.
VREF is the voltage at the VREF pin.
OVERVOLTAGE (SHORT-TO-BATTERY)
PROTECTION
Robust inputs guarantee that sensitive internal circuitry is not
subjected to extreme voltages or currents during a stressful event. A
short-to-battery condition usually consists of a voltage on either
input (or both inputs) that is significantly higher than the power
supply voltage of the amplifier. Duration may vary from a short
transient to a continuous fault.
The ADA4830-1 and ADA4830-2 can withstand voltages of up
to 18 V on the inputs. Critical internal nodes are protected from
exposure to high voltages by circuitry that clamps the inputs at a
safe level and limits internal currents. This protection is available
whether the device is enabled or disabled, even when the supply
voltage is removed.
SHORT-TO-BATTERY OUTPUT FLAG
The short-to-battery output flag (STB pin) is functionally
independent of the short-to-battery protection. Its purpose is
to indicate an overvoltage condition on either input. Because
protection is provided passively, it is always available; the flag
merely indicates the presence or absence of a fault condition.
ESD PROTECTION
All pins on the ADA4830-1 and ADA4830-2 are protected with
internal ESD protection structures connected to the power supply
pins (+VS and GND). These structures provide protection during
the handling and manufacturing process.
The inputs (INN and INP) of the ADA4830-1 and ADA4830-2
can be exposed to dc voltages well above the supply voltage;
therefore, conventional ESD structure protection cannot be used.
The ADA4830-1 and ADA4830-2 employ Analog Devices, Inc.,
proprietary ESD devices at the input pins (INN, INP) to allow
for a wide common-mode voltage range and ESD protection
well beyond the handling and manufacturing requirements.
The inputs of the ADA4830-1 and ADA4830-2 are ESD protected
to survive ±8 kV human body model (HBM)
POWER SUPPLY PINS (ADA4830-2)
As indicated in the Absolute Maximum Ratings section, the voltage
difference between the +VS1 and +VS2 pins of the ADA4830-2
cannot exceed 0.5 V. To ensure compliance with the Absolute
Maximum Ratings, it is recommended that these supply pins be
connected together to the same power supply source.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADA4830-2WBCPZ-R7 | 制造商:AD 制造商全称:Analog Devices 功能描述:High Speed Difference Amplifier with Input |
| ADA484 | 制造商:AD 制造商全称:Analog Devices 功能描述:16-Bit, 1 MSPS PulSAR ADC in MSOP QFN |
| ADA4841 | 制造商:AD 制造商全称:Analog Devices 功能描述:14-Bit, 500 kSPS PulSAR ADC in MSOP |
| ADA4841-1 | 制造商:AD 制造商全称:Analog Devices 功能描述:16-Bit Lower Power |
| ADA4841-1YR-EBZ | 制造商:AD 制造商全称:Analog Devices 功能描述:Low Power, Low Noise and Distortion ail-to-Rail Output Amplifiers |
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