DS1842N+T&R Maxim Integrated Products, DS1842N+T&R Datasheet

IC CURRENT MONITOR 14TDFN

DS1842N+T&R

Manufacturer Part Number
DS1842N+T&R
Description
IC CURRENT MONITOR 14TDFN
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of DS1842N+T&R

Function
Current Monitor
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
14-TDFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output
-
Voltage - Input
-
Accuracy
-
Sensing Method
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
The DS1842 integrates the discrete high-voltage com-
ponents necessary for avalanche photodiode (APD)
bias and monitor applications. A switch FET is used in
conjunction with an external DC-DC controller to create
a boost DC-DC converter. A current clamp limits cur-
rent through the APD and also features an external
shutdown. The device also includes a dual current mir-
ror to monitor the APD current.
19-4557; Rev 1; 3/11
Pin Configuration appears at end of data sheet.
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.
APD Biasing
GPON Optical Network Unit and Optical Line
Transmission
DS1875
________________________________________________________________ Maxim Integrated Products
COMP
MON3
SW
D2
FB
General Description
3.3V
C
COMP
R
COMP
76V, APD, Bias Output Stage with
Applications
LX
GATE
GND
CLAMP
MIROUT
APD
♦ 76V Maximum Boost Voltage
♦ Switch FET
♦ Current Monitor with a Wide 1µA to 2mA Range,
♦ 2mA Current Clamp with External Shutdown
♦ Multiple External Filtering Options
♦ 3mm x 3mm, 14-Pin TDFN Package with Exposed Pad
CURRENT
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
* EP = Exposed pad.
DS1842N+
DS1842N+T&R
LIMIT
CURRENT MIRROR
DS1842
Fast 50ns Time Constant, and 10:1 and 5:1 Ratio
PART
TIA
Current Monitoring
ROSA
MIRIN
MIR1
MIR2
Typical Application Circuit
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
C
Ordering Information
BULK
EXTERNAL MONITOR
PIN-PACKAGE
14 TDFN-EP*
14 TDFN-EP*
Features
1

Related parts for DS1842N+T&R

DS1842N+T&R Summary of contents

Page 1

... R COMP COMP D2 DS1875 MON3 ________________________________________________________________ Maxim Integrated Products 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. Current Monitoring ♦ 76V Maximum Boost Voltage ♦ Switch FET ♦ Current Monitor with a Wide 1µA to 2mA Range, Fast 50ns Time Constant, and 10:1 and 5:1 Ratio ♦ ...

Page 2

APD, Bias Output Stage with Current Monitoring ABSOLUTE MAXIMUM RATINGS Voltage Range on GATE and CLAMP Relative to GND...................................................-0.3V to +12V Voltage Range on MIRIN, MIROUT, MIR1, and MIR2 Relative to GND........................-0.3V to +80V Voltage Range on LX Relative ...

Page 3

A MIRIN vs. MIROUT CURRENT (V = 40V) MIRIN 10,000 1000 100 100 1000 10,000 MIROUT CURRENT (μA) MIR ERROR vs. TEMPERATURE (I = 1μA) MIROUT 2 1 MIR2 0 -1 ...

Page 4

APD, Bias Output Stage with Current Monitoring (T = +25°C, unless otherwise noted.) A FET ON-RESISTANCE vs. DRAIN CURRENT 2. 3. ...

Page 5

MIR1 REF Figure 1. Current Clamp from Current Feedback Detailed Description The DS1842 contains discrete high-voltage compo- nents required to create an APD bias voltage and to monitor the APD bias current. The device’s mirror out- puts are a current ...

Page 6

APD, Bias Output Stage with Current Monitoring Pin Configuration TOP VIEW 1 MIR1 2 MIR2 3 N.C. DS1842 4 N.C. 5 CLAMP GATE 6 *EP GND 7 TDFN *EXPOSED PAD. 6 _______________________________________________________________________________________ For the latest package outline information and ...

Page 7

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 7 © 2011 Maxim Integrated Products ...

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