12-Bit High Output Current Source Data Sheet ADN8810 FEATURES FUNCTIONAL BLOCK DIAGRAM 5V 5V 3.3V High precision 12-bit current source Low noise Long term stability ENCOMP DVDD AVDD PVDD Current output from 0 mA to 300 mA RESET RESET FB Output fault indication 4.096V VREF R SN Low drift 1.6 CS IOUT ADN8810 Programmable maximum current SERIAL SCLK INTERFACE R SN D1 24-lead, 4 mm 4 mm LFCSP 1.6 SDI 3-wire serial interface RSN ADDRESS ADDR0-2 3 FAULT AVSS DVSS DGND SB APPLICATIONS Tunable laser current source FAULT SB Programmable high output current source INDICATION Automatic test equipment Figure 1. GENERAL DESCRIPTION The ADN8810 is a 12-bit current source with an adjustable full- Noise and digital feedthrough are kept low to ensure low jitter scale output current of up to 300 mA. The full-scale output current operation for laser diode applications. Full-scale and scaled is set with two external sense resistors. The output compliance output currents are given in Equation 1 and Equation 2, voltage is 2.5 V, even at output currents up to 300 mA. respectively. The device is particularly suited for tunable laser control and V REF I (1) FS can drive tunable laser front mirror, back mirror, phase, gain, 10 R SN and amplification sections. A host CPU or microcontroller controls the operation of the ADN8810 over a 3-wire serial V 1 R REF SN I Code 0.1 (2) OUT peripheral interface (SPI). The 3-bit address allows up to eight 4096 R 15k SN devices to be independently controlled while attached to the same SPI bus. The ADN8810 is guaranteed with 4 LSB integral nonlinearity (INL) and 0.75 LSB differential nonlinearity (DNL). Rev. C Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20042017 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 03195-0-001ADN8810 Data Sheet TABLE OF CONTENTS Setting Full-Scale Output Current ........................................... 10 Features .............................................................................................. 1 Power Supplies ............................................................................ 10 Applications ....................................................................................... 1 Serial Data Interface ................................................................... 10 Functional Block Diagram .............................................................. 1 Standby and Reset Modes ......................................................... 11 General Description ......................................................................... 1 Power Dissipation....................................................................... 11 Revision History ............................................................................... 2 Using Multiple ADN8810 Devices for Additional Output Specifications ..................................................................................... 3 Current ......................................................................................... 11 Timing Characteristics ................................................................ 4 Adding Dither to the Output Current ..................................... 12 Absolute Maximum Ratings ............................................................ 5 Driving Common-Anode Laser Diodes ................................. 12 ESD Caution .................................................................................. 5 PCB Layout Recommendations ............................................... 13 Pin Configuration and Function Descriptions ............................. 6 Suggested Pad Layout for CP-24 Package ............................... 13 Typical Performance Characteristics ............................................. 7 Outline Dimensions ....................................................................... 14 Terminology ...................................................................................... 9 Ordering Guide .......................................................................... 14 Functional Description .................................................................. 10 REVISION HISTORY 11/2017Rev. B. to Rev. C 3/2016Rev. A to Rev. B Changed R to R .......................................................... Throughout Changes to Figure 3 and Table 4 ...................................................... 7 S SN Change to Figure 1 ........................................................................... 1 Updated Outline Dimensions ....................................................... 15 Changes to Maximum Full-Scale Output Current Parameter Changes to Ordering Guide .......................................................... 15 and Power Supply Rejection Ratio Parameter, Table 1 ................ 3 Moved Timing Characteristics Section, Table 2, and Figure 2 ..... 4 4/2009Rev. 0 to Rev. A Added Lead Temperature Range (Soldering 10 sec) Parameter, Changes to Table 3 ............................................................................. 6 Table 3 ................................................................................................ 5 Changes to Figure 25 ...................................................................... 14 Changes to Figure 3 and Table 4 ..................................................... 6 Updated Outline Dimensions ....................................................... 15 Changes to Setting Full-Scale Output Current Section ............. 10 Changes to Ordering Guide .......................................................... 15 Changes to Adding Dither to the Output Current Section, Figure 20, and Figure 21 ................................................................ 12 1/2004Revision 0: Initial Version Changes to PCB Layout Recommendations Section and Figure 25 .......................................................................................... 13 Updated to Outline Dimensions .................................................. 14 Rev. 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