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Maxim Integrated Semiconductor Electronic Components Datasheet

DS3920 Datasheet

Fast Current Mirror

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19-5797; Rev 0; 3/11
DS3920
Fast Current Mirror
General Description
The DS3920 precision current mirror is designed for ava-
lanche photodiode (APD) and PIN photodiode biasing
and monitoring applications. The device offers a current
clamp to limit current through the APD and a current mir-
ror output that produces a signal proportional (5:1) to the
APD current. A diode is also provided to limit the voltage
at the current mirror output.
The device accepts a +2.97V to +76V current mirror
supply voltage. Internal current limiting (2.9mA or 20mA,
typ) protects the monitored device from a short circuit to
ground. The provided internal clamp diode protects the
current mirror output from overvoltage. Additionally, the
device features thermal shutdown if the die temperature
reaches +150NC.
The device is available in a 6-pin SOT23 package, and
operates over the -40NC to +85NC extended temperature
range.
Features
S Wide Voltage Input Range: 2.97V to 76V
S Current Monitor
Wide 250nA to 2mA Range
5:1 Mirror Ratio
Fast 50ns Time Constant
S Current Clamp (2.9mA or 20mA, typ)
S Voltage Clamp Protects Subsequent Output Circuitry
S 6-Pin SOT23 (MAX4007 Compatible)
Applications
Avalanche Photodiode (APD) Biasing
PIN Photodiode Monitoring
GEPON, GPON, 10GEPON, XGPON: ONU and OLT
Ordering Information appears at end of data sheet.
Typical Application Circuit
www.DataSheet4U.net
3.3V
DIODE
CURRENT
MONITOR
IMIROUT
MIRIN
IMIROUT/5
APD BIAS
RFILTER
CFILTER
0.1μF
THERMAL
SHUTDOWN
GND
CURRENT
LIMIT
MIROUT
DS3920
RAGC
499
ROSA
APD
TIA
MIR IMIROUT/5
VOUT
ROUT
For related parts and recommended products to use with this part, refer to: www.maxim-ic.com/DS3920.related
����������������������������������������������������������������� Maxim Integrated Products   1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

DS3920 Datasheet

Fast Current Mirror

No Preview Available !

DS3920
Fast Current Mirror
ABSOLUTE MAXIMUM RATINGS
Voltage Range on MIRIN, MIROUT,
and DIODE Relative to GND .............................-0.3V to +80V
Voltage Range on MIR
Relative to GND .............................. -0.3V to (VDIODE + 0.6V)
Continuous Power Dissipation (TA = +70NC)
SOT23 (derate 13.4mW/NC above +70NC)..............1072.4mW
Operating Junction Temperature Range.......... -40NC to +150NC
Storage Temperature Range............................ -55NC to +135NC
Lead Temperature (soldering, 10s).................................+300NC
Soldering Temperature (reflow).......................................+260NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VMIRIN = 2.97V to 76V, TA = -40NC to +85NC, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIRIN Voltage
MIRIN Current
Diode Forward Current
Diode Forward Voltage
MIROUT Current Limit
VMIRIN
IMIRIN
IDF
VDF
IMIROUT
IMIROUT = 2.5mA
IDF = 100FA, TA = +25NC
IDF = 5mA, TA = +25NC
DS3920T-001 version
DS3920T-002 version
MIROUT Series Resistance
MIR to MIROUT Ratio
Power-Supply Rejection Ratio
MIR Currentwww.DataSheet4U.net Rise Time
(20%/80%)
RAGC
KMIR
(DIMIR/IMIR)
/DVMIRIN
(Note 1)
1FA to 2.5mA
IMIROUT > 2.5mA
VMIRIN = 3V (Note 2)
VMIRIN = 30V or 60V (Notes 2, 3)
tRC (Note 4)
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
TSHDN
THYST
(Note 3)
(Note 3)
Note 1: See the Typical Application Circuit.
Note 2: 1V DC change applied to MIRIN; 100FA at MIROUT; 4.99kI load to ground on MIR.
Note 3: Guaranteed by design; not production tested.
Note 4: Rising MIROUT transition from 10FA to 1mA; 15V < VOUT < 76V.
MIN
2.97
10
2
100
0.190
0.180
TYP
0.6
20
2.9
0.200
0.200
4800
100
MAX
76
4.4
5
1.25
40
4.4
0.210
0.220
15,000
500
UNITS
V
mA
mA
V
mA
W
A/A
ppm/V
30 ns
+150
20
NC
NC
����������������������������������������������������������������� Maxim Integrated Products   2
*The parametric values (min, typ, max limits) shown in the Electrical Characteristics table supersede values quoted elsewhere in this data sheet.


Part Number DS3920
Description Fast Current Mirror
Maker Maxim Integrated Products
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DS3920 Datasheet PDF






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