DataSheetWiki


ADL5315 fiches techniques PDF

Analog Devices - Precision Wide Range (3 nA to 3 mA) High-Side Current Mirror

Numéro de référence ADL5315
Description Precision Wide Range (3 nA to 3 mA) High-Side Current Mirror
Fabricant Analog Devices 
Logo Analog Devices 





1 Page

No Preview Available !





ADL5315 fiche technique
www.DataSheet4U.com
Precision Wide Range (3 nA to 3 mA)
High-Side Current Mirror
ADL5315
FEATURES
Accurately mirrors input current (1:1 ratio) over 6 decades
Linearity 1% from 3 nA to 3 mA
Stable mirror input voltage
Voltage held 1 V below supply using internal reference
or can be set externally
Adjustable input current limit
2.7 V to 8 V single-supply operation
Miniature 8-lead LFCSP (2 mm × 3 mm)
APPLICATIONS
Optical power monitoring from a single photodiode
General voltage biasing with precision current monitoring
Voltage-to-current conversion
FUNCTIONAL BLOCK DIAGRAM
ADL5315
VOLTAGE
REFERENCE
4
COMM
CURRENT
LIMITING
5
RLIM
20kΩ
3
SREF
CURRENT
MIRROR
1:1
6
VPOS
VSET
2
NC
7
INPT
1
IPD
IOUT
8
IPD
Figure 1.
GENERAL DESCRIPTION
The ADL5315 is a wide input current range, precision high-side
current mirror featuring a stable and user-adjustable input
voltage. It is optimized for use with PIN photodiodes, but its
flexibility and wide operating range make it suitable for a broad
array of additional applications. Over the 3 nA to 3 mA range,
the current sourced from the INPT pin is accurately mirrored
with a 1:1 ratio and sourced from the IOUT output pin. In a
typical photodiode application, the output drives a current-
input logarithmic amplifier to produce a linear-in-dB output
representing the optical power incident upon the photodiode.
For linear voltage output, a single resistor to ground is all that is
required. The photodiode anode can be connected to a high
speed transimpedance amplifier for the extraction of the data
stream. The voltage at the INPT pin is temperature stable with
respect to the voltage at the VSET input pin, which it tracks. A
temperature stable reference voltage is provided at the SREF
pin, which, when tied to VSET, fixes the voltage at INPT 1.0 V
below VPOS. VSET can also be driven from an external source.
The VSET input has very low input current and can be driven
as low as the bottom rail, facilitating nonloading voltage-to-
current conversion as well as minimizing dark current in
photodiode applications.
The ADL5315 also features adjustable input current limiting
using an external resistor from RLIM to VPOS. The maximum
current sourced by INPT (and IOUT) can be set between 1 mA
and 16 mA, beyond which the voltage at INPT falls rapidly
from its setpoint. Connecting RLIM directly to VPOS provides
basic input short-circuit protection with the default current
limit of 16 mA typical.
The ADL5315 is available in a 2 mm × 3 mm, 8-lead LFCSP and
is specified for operation from −40°C to +85°C.
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
© 2005 Analog Devices, Inc. All rights reserved.

PagesPages 20
Télécharger [ ADL5315 ]


Fiche technique recommandé

No Description détaillée Fabricant
ADL5310 Dual Logarithmic Converter Analog Devices
Analog Devices
ADL5315 Precision Wide Range (3 nA to 3 mA) High-Side Current Mirror Analog Devices
Analog Devices
ADL5317 Avalanche Photodiode Bias Controller and Wide Range Analog Devices
Analog Devices

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche