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| 型号： | MAX9626ATC+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/20页 |
| 文件大小： | 0K |
| 描述： | IC DIFF AMP/DRIVER LN 12TQFN |
| 标准包装： | 2,500 |
| 放大器类型： | 差分 |
| 电路数： | 1 |
| 输出类型： | 差分 |
| 转换速率： | 6500 V/µs |
| -3db带宽： | 700MHz |
| 电流 - 输入偏压： | 1µA |
| 电压 - 输入偏移： | 2000µV |
| 电流 - 电源： | 59mA |
| 电流 - 输出 / 通道： | 100mA |
| 电压 - 电源，单路/双路(±)： | 2.85 V ~ 5.25 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | * |
| 封装/外壳： | * |
| 供应商设备封装： | * |
| 包装： | * |
MAX9626/MAX9627/MAX9628
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
15
Detailed Description
The MAX9626/MAX9627/MAX9628 family employs
voltage feedback to implement a differential-in to
differential-out amplifier. On-chip feedback resistors set
the gain of the amplifier. The use of on-chip resistors
not only saves cost and space, but also maximizes the
overall amplifier’s performance.
There are two feedback loops within the amplifier
circuit. The differential feedback loop employs the on-
chip resistors to set the differential gain. The signal is
applied differentially at the inputs and the output signal is
obtained differentially at the outputs. The common-mode
feedback loop controls the common-mode voltage at the
outputs. Both inverting and noninverting outputs exhibit
a common-mode voltage equal to the voltage applied
at VOCM input, without affecting the differential output
signal. The outputs are perfectly balanced having
signals of equal amplitude and 180N apart in-phase.
Amplifier input impedance is determined by internal
gain resistors. Therefore, source impedance does affect
the gain of the amplifier. Input termination resistors
are required to achieve source impedance match. If
preferred, the customer has the choice of using the
on-chip termination resistors. If they are used, then
the amplifier’s input impedance is 50I for single-
ended input configuration. The amplifier’s differential gain
accuracy is directly affected by the source impedance
value.
The ICs feature a proprietary circuit design. The use
of predistortion and dynamic distortion cancellation
greatly improves large-signal AC-performance at high
frequency.
Fixed Gain Options for
Best AC Performance
The ICs have internal gain resistors to achieve
excellent bandwidth and distortion performance. Because
the virtual ground nodes among the gain resistors and
the inputs of the amplifier are internal to the device, the
parasitic capacitors of such nodes are kept to the
minimum. This enhances the AC performance of the
device.
The ICs have three gain options with resistor values as
per Table 1, while keeping the bandwidth constant.
The differential gain is given by the equation: G = RF/RG
Internal Terminations
Use the internal RT resistors in applications where the
source impedance RS is 50I and the input impedance
of the amplifier has to match with it. For a perfectly
balanced circuit driven by a differential source
impedance, the input impedance of the amplifier is given
by the simple equation RIN = 2 x RG. For single-ended
input applications, where the source impedance of 50I
connects to either input, such as in the Typical Operating
Circuit, the input impedance of the amplifier is given by
the equation:
G
IN
F
G
F
R
1
2 x (R
R )
=
+
To match the input impedance RS, the following condi-
tion must be met: RIN||RT = RS
Therefore:
(
)
S
T
S
F
G
F
R
0.5 x
R
2 x R
R
1
R
=
+
+
From this equation it can be inferred that RT is about 64I
for all the cases of Table 1.
Table 1. Amplifier’s Gain Setting and
Internal Resistor Values
GAIN (V/V)
RG (I)
RF (I)
3dB
BANDWIDTH
(GHz)
1
200
1
2
150
300
1.35
4
125
500
1.15
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9626ETC+ | 功能描述:差分放大器 Low-Noise/Distortion Differential Amp RoHS:否 制造商:Texas Instruments 通道数量:1 Channel 带宽:2.4 GHz 可用增益调整:6 dB to 26 dB 输入补偿电压: 共模抑制比（最小值）:- 40 dB 工作电源电压:4.75 V to 5.25 V 电源电流:100 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:WQFN-24 封装:Reel |
| MAX9626EVKIT+ | 功能描述:放大器 IC 开发工具 Low-Noise Low-Distortion Differential-Input Differential-Output Fixed-Gain Amplifiers RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| MAX9627ATC+ | 功能描述:差分放大器 Low-Noise/Distortion Differential Amp RoHS:否 制造商:Texas Instruments 通道数量:1 Channel 带宽:2.4 GHz 可用增益调整:6 dB to 26 dB 输入补偿电压: 共模抑制比（最小值）:- 40 dB 工作电源电压:4.75 V to 5.25 V 电源电流:100 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:WQFN-24 封装:Reel |
| MAX9627ATC+T | 功能描述:差分放大器 1.35GHz Differential Amplifier RoHS:否 制造商:Texas Instruments 通道数量:1 Channel 带宽:2.4 GHz 可用增益调整:6 dB to 26 dB 输入补偿电压: 共模抑制比（最小值）:- 40 dB 工作电源电压:4.75 V to 5.25 V 电源电流:100 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:WQFN-24 封装:Reel |
| MAX9627ETC+ | 功能描述:差分放大器 Low-Noise/Distortion Differential Amp RoHS:否 制造商:Texas Instruments 通道数量:1 Channel 带宽:2.4 GHz 可用增益调整:6 dB to 26 dB 输入补偿电压: 共模抑制比（最小值）:- 40 dB 工作电源电压:4.75 V to 5.25 V 电源电流:100 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:WQFN-24 封装:Reel |
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