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Analog Devices - 12-Bit High Output Current Source

Numéro de référence ADN8810ACP
Description 12-Bit High Output Current Source
Fabricant Analog Devices 
Logo Analog Devices 





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ADN8810ACP fiche technique
12-Bit High Output Current Source
ADN8810
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.
IFS
VREF
10 × RSN
(1)
IOUT
=
Code × VREF
4096
×
1
RSN
×
⎜⎛
⎜⎝
RSN
15k
+ 0.1⎟⎟⎠⎞
(2)
FUNCTIONAL BLOCK DIAGRAM
5V 5V 3.3V
RESET
4.096V
SERIAL
INTERFACE
ADDRESS
ENCOMP DVDD AVDD PVDD
RESET
FB
VREF
CS
SCLK
ADN8810
IOUT
SDI
ADDR0-2
3 FAULT
RSN
SB AVSS DVSS DGND
RSN
1.6V
RSN
1.6V
D1
FAULT SB
INDICATION
Figure 1.
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.

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