iC-HB Triple 155 MHz Laser Switch
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iC-HB TRIPLE 155MHz LASER SWITCH Rev A3, Page 1/8 FEATURES © Laser switch for frequencies from CW up to 155MHz © Spike-free switching of the laser currents © Three channels with independent current control at pins CIx © Operates as a voltage-controlled current sink © LVDS/TTL switching inputs with TTL monitor outputs © Pulsed operation with up to 300mA per channel © CW operation with up to 65mA per channel © Laser current monitor output © Thermal shutdown with open drain error output © Protective ESD circuitry APPLICATIONS © Laser printers © Data transmission © Laser scanning devices PACKAGES QFN24 4mm x 4mm BLOCK DIAGRAM LVDS/TTL LVDS/TTL 1k iC-HB 1k 1k LVDS/TTL OVERTEMP SHUTDOWN IK1 IKB IK2 CIB CI2 CI1 LDK2 AGND1 AGND2 IMON LDK1 AGNDB LDKB NER GND VDD VTTL SYNB EN2 EP2 SYN1 EN1 EP1 TTL SYN2 EPB ENB Copyright © 2008 iC-Haus http://www.ichaus.com

iC-HB TRIPLE 155MHz LASER SWITCH Rev A3, Page 2/8 DESCRIPTION Triple Laser Switch iC-HB enables the spike-free switching of laser diodes with well-defined current pulses at frequencies ranging from DC to 155 MHz. The diode current is determined by the voltages at pins CIx. The three fast switches are controlled independently via LVDS/TTL inputs. Input TTL = hi selects TTL type inputs. The laser diode can thus be turned on and off or switched between different current levels (LDKx connected) defined by the voltages at CI1, CI2 and CIB. Channel B is preferably used for biasing. For current...

iC-HB TRIPLE 155MHz LASER SWITCH Rev A3, Page 3/8 ABSOLUTE MAXIMUM RATINGS Beyond these values damage may occur; device operation is not guaranteed. Item Symbol Parameter Conditions Unit No. Min. Max. G001 VDD Voltage at VDD -0.7 6 V G002 I(VDD) Current in VDD -10 150 mA G003 V(CIx) Voltage at CI1, CI2, CIB -0.7 6 V G004 I(LDKc) Current in LDK1, LDK2, LDKB DC current -10 300 mA G005 I(AGND1) Current in AGND1, AGND2, AGNDB DC current -150 10 mA G006 V() Voltage at EN1, EN2, AGND1, AGND2, AGNDB -0.7 6 V G007 V(LDKx) Voltage at LDK1, LDK2, LDKB -0.7 6 V G008 Vd() Susceptibility to ESD at all...

iC-HB TRIPLE 155MHz LASER SWITCH Rev A3, Page 4/8 ELECTRICAL CHARACTERISTICS Operating Conditions: VDD = 3.5...5.5V, VTTL = 3.15...5.5 V, Tj = -25...125 °C unless otherwise stated Item Symbol Parameter Conditions Unit No. Min. Typ. Max. Total Device 001 VDD Permissible Supply Voltage 3.5 5.5 V 002 VTTL Permissible Supply Voltage at VTTL 3.15 5.5 003 I(VDD) Supply Current in VDD CW operation 2 8 mA 004 I(VDD) Supply Current in VDD pulsed operation, f(ENx, EPx) = 150MHz 80 mA 005 I(VTTL) Supply Current in VTTL 1 mA 006 V(LDKx) Permissible Voltage at LDK1, LDK2, LDKB 0 5.5 V 007 Vc(CIx)hi...

iC-HB TRIPLE 155MHz LASER SWITCH Rev A3, Page 5/8 ELECTRICAL CHARACTERISTICS Operating Conditions: VDD = 3.5...5.5V, VTTL = 3.15...5.5 V, Tj = -25...125 °C unless otherwise stated Item Symbol Parameter Conditions Unit No. Min. Typ. Max. 118 Vt(EPx)hi Input Threshold Voltage hi at EP1, EP2, EPB TTL = hi, ENx = open 2 V 119 Vt(EPx)lo Input Threshold Voltage low at EP1, EP2, EPB TTL = hi, ENx = open 0.8 120 Vhys(EPx) Hysteresis 20 mV 121 Vt(CIx) Threshold Voltage at CI1, CI2, CIB I(LDKx) < 5mA 0.9 1.4 V 122 CR() Current Matching Channel1 / Channel2 V(CI1) = V(CI2) = 0...VDD, I(LDKx) = tbd 0.9...

iC-HB TRIPLE 155MHz LASER SWITCH Rev A3, Page 7/8 iC-Haus expressly reserves the right to change its products and/or specifications. An info letter gives details as to any amendments and additions made to the relevant current specifications on our internet website www.ichaus.de; this letter is generated automatically and shall be sent to registered users by email. Copying – even as an excerpt – is only permitted with iC-Haus approval in writing and precise reference to source. iC-Haus does not warrant the accuracy, completeness or timeliness of the specification on this site and does not...

iC-HB TRIPLE 155MHz LASER SWITCH Rev A3, Page 8/8 ORDERING INFORMATION Type Package Order Designation iC-HB QFN24 4mm x 4mm iC-HB QFN24 For technical support, information about prices and terms of delivery please contact: iC-Haus GmbH Tel.: +49 (61 35) 92 92-0 Am Kuemmerling 18 Fax: +49 (61 35) 92 92-192 D-55294 Bodenheim Web: http://www.ichaus.com GERMANY E-Mail: sales@ichaus.com Appointed local distributors: http://www.ichaus.de/support_distributors.php