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參數資料
| 型號： | DS3920T-001+ |
| 廠商： | Maxim Integrated |
| 文件頁數： | 6/7頁 |
| 文件大小： | 1204K |
| 描述： | IC CURRENT MIRROR 5:1 SOT23-6 |
| 標準包裝： | 50 |
| 功能： | 電流鏡像 |
| 輸入電壓： | 2.97 V ~ 76 V |
| 電流 - 輸出： | 20mA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SOT-23-6 |
| 供應商設備封裝： | SOT-6 |
| 包裝： | 管件 |
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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相關代理商/技術參數 |
參數描述 |
|---|---|
| DS3920T-001+ | 功能描述:電流和電力監控器、調節器 Fast APD Bias RoHS:否 制造商:STMicroelectronics 產品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| DS3920T-001+T | 功能描述:電流和電力監控器、調節器 Fast APD Bias w/20mA limit RoHS:否 制造商:STMicroelectronics 產品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| DS3920T-002+ | 功能描述:電流和電力監控器、調節器 Fast Current Mirror RoHS:否 制造商:STMicroelectronics 產品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| DS3920T-002+T | 功能描述:電流和電力監控器、調節器 Fast APD Bias w/20mA limit RoHS:否 制造商:STMicroelectronics 產品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| 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 |
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