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参数资料
| 型号： | DS3920T-002+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 6/7页 |
| 文件大小： | 1204K |
| 描述： | IC CURRENT MIRROR 5:1 SOT23-6 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 电流镜像 |
| 输入电压： | 2.97 V ~ 76 V |
| 电流 - 输出： | 4.4mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-6 |
| 包装： | 带卷 (TR) |
DS3920
Fast Current Mirror
6
Maxim Integrated
Detailed Description
The DS3920 provides a fast, precision current mirror for
photodiode-monitoring applications. The current mirror
is accurate across a large dynamic range. The mirror
response time is fast enough to comply with GPON Rx
burst-mode monitoring requirements. The device has a
built-in current limiting feature to protect photodiodes
from large signal inputs, and an included thermal shut-
down. A diode is provided to limit the voltage at the MIR
output.
Current Mirror
The mirror output is typically connected to an analog-
to-digital converter (ADC) using a resistor to convert the
mirrored current into a voltage. The resistor to ground
should be selected so that the ADCs full-scale voltage is
reached when the maximum mirrored current is reached.
For example, given that the maximum monitored current
through the APD is 2mA, 1.25V ADC full scale, and a 5:1
mirror ratio, the correct resistor is approximately 3.2kI.
The mirror response time is dominated by the amount of
capacitance placed on the output.
Current Clamp
The device features a current clamping circuit to protect
the photodiode by limiting the amount of current from
MIROUT to no more than I
MIROUT
. See the Ordering
Information for available current clamp options.
Diode Protection
A diode is internally connected from the MIR to DIODE
pins. This enables an external voltage applied to DIODE
to limit the voltage on MIR. The voltage applied to DIODE
should be equal to the desired V
MIR
limit minus the diode
forward voltage drop, or V
MIR
- V
DF
.
Thermal Shutdown
As a safety feature, the device has a thermal shutdown
circuit that turns off the MIROUT and MIR currents when
the internal die temperature exceeds T
SHDN
. The thermal
shutdown mechanism has a built-in hysteresis of T
HYST
.
Thus, the MIROUT and MIR currents resume once the
device has cooled to T
SHDN
- T
HYST
.
Ordering Information
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a
+ , # , or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the
drawing pertains to the package regardless of RoHS status.
PART
TEMP RANGE
TYP CURRENT LIMIT (mA)
PIN-PACKAGE
DS3920T-001+
-40NC to +85NC
20
6 SOT23
DS3920T-001+T
-40NC to +85NC
20
6 SOT23
DS3920T-002+
-40NC to +85NC
4.4
6 SOT23
DS3920T-002+T
-40NC to +85NC
4.4
6 SOT23
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
LAND PATTERN NO.
6 SOT23
U6SN+1
21-0058
90-0175
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS3922T+ | 制造商:Maxim Integrated Products 功能描述:ADV APD MIRROR W/INT FET & STAT OUT - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC CURRENT MIRROR TQFN |
| DS3923T+ | 制造商:Maxim Integrated Products 功能描述:RSSI SAMPLE/HOLD AND CURRENT MIRROR - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC CURRENT MIRROR TQFN |
| DS3930 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Hex Nonvolatile Potentiometer with I/O and Memory |
| DS3930E | 功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| DS3930E/T&R | 制造商:Maxim Integrated Products 功能描述:HEX NV POT WITH I/O & MEM T&R - Tape and Reel |
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