参数资料
| 型号： | AD602JRZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 20/33页 |
| 文件大小： | 0K |
| 描述： | IC AMP VGA DUAL LN 50MA 16SOIC |
| 标准包装： | 400 |
| 系列： | X-AMP® |
| 放大器类型： | 可变增益 |
| 电路数： | 2 |
| 转换速率： | 275 V/µs |
| -3db带宽： | 35MHz |
| 电流 - 输入偏压： | 350nA |
| 电流 - 电源： | 11mA |
| 电流 - 输出 / 通道： | 50mA |
| 电压 - 电源，单路/双路(±)： | ±4.75 V ~ 5.25 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 带卷 (TR) |
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AD600/AD602
Rev. F | Page 26 of 32
For the next 40 dB of control range, the gain of U1A remains
fixed at its maximum value of 41.07 dB and only the gain of
U1B is varied, while that of U2A remains at its minimum value
of 1.07 dB. In this interval, the fixed output noise of U1A is
amplified by the increasing gain of U1B, and the SNR
progressively decreases.
Once U1B reaches its maximum gain of 41.07 dB, its output
also becomes a gain-independent noise source; this noise is
presented to U2A. As the control voltage is further increased,
the gains of both U1A and U1B remain fixed at their maximum
value of 41.07 dB, and the SNR continues to decrease. Figure 56
clearly shows this because the maximum SNR of 90 dB is
extended for the first 40 dB of input signal before it starts to roll off.
This arrangement of staggered gains can be easily implemented
because, when the control inputs of the AD600 are overdriven,
the gain limits to its maximum or minimum values without side
effects. This eliminates the need for awkward nonlinear shaping
circuits that have previously been used to break up the gain
range of multistage AGC amplifiers. The precise values of the
AD600’s maximum and minimum gain (not 0 dB and +40 dB
but 1.07 dB and +41.07 dB) explain the rather odd values of
the offset values that are used.
The optimization of the output SNR is of obvious value in AGC
systems. However, in applications where these circuits are
considered for their wide range logarithmic measurement
capabilities, the inevitable degradation of the SNR at high gains
need not seriously impair their utility. In fact, the bandwidth of
the circuit shown in Figure 47 was specifically chosen to improve
measurement accuracy by altering the shape of the log error
curve at low signal levels (see Figure 53).
相关PDF资料 |
PDF描述 |
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| P4KE75CA-G | TVS 400W 75V 5% BIDIR DO-41 |
| 225CJ | FUSE 225A 600V CERAM BODY CSA |
| AD600JRZ-R7 | IC AMP VGA DUAL LN 50MA 16SOIC |
| AD585JPZ-REEL7 | IC AMP SAMPLE HOLD 50MA 20PLCC |
| NPS 2-T126 5.000 OHM 1% | RES 5.0 OHM 25W 1% DPAK |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD602JRZ-RL | 功能描述:IC AMP VGA DUAL LN 50MA 16SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 标准包装:2,500 系列:Excalibur™ 放大器类型:J-FET 电路数:1 输出类型:- 转换速率:45 V/µs 增益带宽积:10MHz -3db带宽:- 电流 - 输入偏压:20pA 电压 - 输入偏移:490µV 电流 - 电源:1.7mA 电流 - 输出 / 通道:48mA 电压 - 电源，单路/双路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:带卷 (TR) |
| AD602SQ/883B | 制造商:Rochester Electronics LLC 功能描述:VARIABLE GAIN AMP IC - Bulk |
| AD603 | 制造商:AD 制造商全称:Analog Devices 功能描述:Low Noise, 90 MHz Variable Gain Amplifier |
| AD603_05 | 制造商:AD 制造商全称:Analog Devices 功能描述:Low Noise, 90 MHz Variable Gain Amplifier |
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