参数资料
| 型号： | MAX4206ETE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/17页 |
| 文件大小： | 0K |
| 描述： | IC AMP TRANS LOG 16-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 放大器类型： | 对数 |
| 电路数： | 1 |
| 转换速率： | 12 V/µs |
| 增益带宽积： | 5MHz |
| 电压 - 输入偏移： | 1000µV |
| 电流 - 电源： | 5mA |
| 电流 - 输出 / 通道： | 58mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 11 V，±2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WQFN 裸露焊盘 |
| 供应商设备封装： | 16-TQFN-EP（4x4） |
| 包装： | 管件 |
| 产品目录页面： | 1388 (CN2011-ZH PDF) |
MAX4206
Precision Transimpedance Logarithmic
Amplifier with Over 5 Decades of Dynamic Range
14
______________________________________________________________________________________
Scale Factor
The scale factor, K, is the slope of the logarithmic output.
For the LOGV1 amplifier, K = 0.25V/decade. When oper-
ating from dual supplies, adjust the overall scale factor
for the MAX4206 using the uncommitted LOGV2 amplifi-
er and the following equation, which refers to Figure 6:
Select R2 between 1k and 100k.
Design Example
Desired:
Dual-Supply Operation
Logarithmic intercept: 1A
Overall scale factor = 1V/decade
Select R1 = 10k:
Measuring Optical Absorbance
A photodiode provides a convenient means of measur-
ing optical power, as diode current is proportional to
the incident optical power. Measure absolute optical
power using a single photodiode connected at LOGIIN,
with the MAX4206’s internal current reference driving
REFIIN. Alternatively, connect a photodiode to each of
the MAX4206’s logging inputs, LOGIIN and REFIIN, to
measure relative optical power (Figure 7).
In absorbance measurement instrumentation, a refer-
ence light source is split into two paths. The unfiltered
path is incident upon the photodiode of the reference
channel, REFIIN. The other path passes through a sam-
ple of interest, with the resulting filtered light incident on
the photodiode of the second channel, LOGIIN. The
MAX4206 outputs provide voltages proportional to the
log ratio of the two optical powers—an indicator of the
optical absorbance of the sample.
In wavelength-locking applications, often found in
fiberoptic communication modules, two photodiode cur-
rents provide a means of determining whether a given
optical channel is tuned to the desired optical frequency.
In this application, two bandpass optical filters with over-
lapping “skirts” precede each photodiode. With proper fil-
ter selection, the MAX4206 output can vary monotonically
(ideally linearly) with optical frequency.
Rk
V decade
k
210
1
025
40
=×
=
/
.
R
V
A
k
SET =
×
=
05
10 1
50
.
RR
K
21
025
=
.
MAX4206
VEE
GND
REFIIN
LOGIIN
IIN
CMVIN
REFIOUT
CMVOUT
REFISET
SCALE
LOGV2
OSADJ
LOGV1
REFVOUT
VCC
RCOMP
100
CCOMP
100pF
RSET
500k
ROS
0
R1
10k
R2
30k
0.1F
VOUT
0.1F
RCOMP
100
CCOMP
100pF
Figure 5. Single-Supply Typical Operating Circuit
MAX4206
VEE
GND
REFIIN
REFIOUT
LOGIIN
IIN
REFISET
SCALE
LOGV2
LOGV1
CMVIN
CMVOUT
VCC
RCOMP
100
CCOMP
100pF
RSET
50k
R1
10k
R2
40k
0.1F
VOUT
RCOMP
100
CCOMP
100pF
OSADJ
REFVOUT
R4
R3
Figure 6. Dual-Supply Typical Operating Circuit
相关PDF资料 |
PDF描述 |
|---|---|
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4206ETE+ | 功能描述:对数放大器 Transimpedance w/ 100Db Dynamic Range RoHS:否 制造商:Texas Instruments 通道数量:3 带宽:3 dB 共模抑制比（最小值）: 输入补偿电压:+/- 7 mV 输入电压范围（最大值）:5.5 V 工作电源电压:4.5 V to 5.5 V 电源电流:+/- 15 mA 工作温度范围:- 40 C to +85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| MAX4206ETE+T | 功能描述:对数放大器 Transimpedance w/ 100Db Dynamic Range RoHS:否 制造商:Texas Instruments 通道数量:3 带宽:3 dB 共模抑制比（最小值）: 输入补偿电压:+/- 7 mV 输入电压范围（最大值）:5.5 V 工作电源电压:4.5 V to 5.5 V 电源电流:+/- 15 mA 工作温度范围:- 40 C to +85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| MAX4206ETE-T | 功能描述:对数放大器 Transimpedance w/ 100Db Dynamic Range RoHS:否 制造商:Texas Instruments 通道数量:3 带宽:3 dB 共模抑制比（最小值）: 输入补偿电压:+/- 7 mV 输入电压范围（最大值）:5.5 V 工作电源电压:4.5 V to 5.5 V 电源电流:+/- 15 mA 工作温度范围:- 40 C to +85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| MAX4206EVKIT | 功能描述:放大器 IC 开发工具 Transimpedance w/ 100Db Dynamic Range 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 |
| MAX4206EVKIT+ | 功能描述:放大器 IC 开发工具 MAX4206 EVAL KIT 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 |
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