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ADN8810 Datasheet(PDF) 1 Page - Analog Devices |
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ADN8810 Datasheet(HTML) 1 Page - Analog Devices |
1 / 16 page 12-Bit High Output Current Source ADN8810 Rev. 0 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 rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved. FEATURES High precision 12-bit current source Low noise Long term stability Current output from 0 mA to 300 mA Output fault indication Low drift Programmable maximum current 24-lead 4 mm × 4 mm leadframe chip scale package 3-wire serial interface APPLICATIONS Tunable laser current source Programmable high output current source Automatic test equipment GENERAL DESCRIPTION The ADN8810 is a 12-bit current source with an adjustable full-scale output current of up to 300 mA. The full-scale out- put current is set with two external sense resistors. The output compliance voltage is 2.5 V, even at output currents up to 300 mA. The device is particularly suited for tunable laser control and can drive tunable laser front mirror, back mirror, phase, gain, and amplification sections. A host CPU or microcontroller controls the operation of the ADN8810 over a 3-wire SPI® interface. The 3-bit address allows up to eight devices to be independently controlled while attached to the same SPI bus. The ADN8810 is guaranteed with ± 4 LSB INL and ± 0.75 LSB DNL. Noise and digital feedthrough are kept low to ensure low jitter operation for laser diode applications. Full-scale and scaled output currents are given in Equations 1 and 2, respectively. SN REF FS R V I × ≈ 10 (1) ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ + × × × = 1 . 0 15 1 4096 k R R V Code I SN SN REF OUT (2) FUNCTIONAL BLOCK DIAGRAM RESET RESET ENCOMP FB DVDD AVDD PVDD 5V 5V 3.3V 4.096V VREF CS SERIAL INTERFACE SCLK SDI ADDRESS ADDR0-2 IOUT RSN RSN 1.6V RSN 1.6V D1 ADN8810 FAULT SB AVSS DVSS DGND SB FAULT INDICATION 3 Figure 1. |
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