数据搜索系统,热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

ADPD2212 数据表(PDF) 10 Page - Analog Devices

部件名 ADPD2212
功能描述  Low Noise, High Sensitivity Optical Sensor
Download  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADPD2212 数据表(HTML) 10 Page - Analog Devices

Back Button ADPD2212 Datasheet HTML 6Page - Analog Devices ADPD2212 Datasheet HTML 7Page - Analog Devices ADPD2212 Datasheet HTML 8Page - Analog Devices ADPD2212 Datasheet HTML 9Page - Analog Devices ADPD2212 Datasheet HTML 10Page - Analog Devices ADPD2212 Datasheet HTML 11Page - Analog Devices ADPD2212 Datasheet HTML 12Page - Analog Devices ADPD2212 Datasheet HTML 13Page - Analog Devices ADPD2212 Datasheet HTML 14Page - Analog Devices  
Zoom Inzoom in Zoom Outzoom out
 10 / 14 page
background image
Data Sheet
ADPD2212
Rev. 0 | Page 9 of 13
THEORY OF OPERATION
OVERVIEW
The ADPD2212 is an integrated, low power, optical sensor
composed of a deep junction silicon photodiode coupled to a
low noise current amplifier in an optically transparent chip
scale package. The ADPD2212 is optimized for battery-
powered, wearable, medical, and industrial optical sensing
applications requiring low power and high SNR.
SHOT NOISE LIMITED PERFORMANCE
The on-board photodiode of the ADPD2212 is operated in
photoconductive mode with a zero bias voltage. This mode of
operation allows the diode to operate with no dc dark current
caused by leakage across the depletion area of the diode,
providing a fundamental limit of shot noise. The noise level is
proportional to the square root of the frequency bandwidth.
SENSITIVITY AND SNR
SNR is a measure of the ability of the sensor to separate the
signal of interest from spurious signals that occur from the
surrounding environment of the device, such as ambient light,
nonlinearity, and noise within the device itself.
The ADPD2212 operates its integrated photodiode in a zero
biased photoconductive mode to provide near zero dark current
and, therefore, no dark shot noise component contribution
from the photodiode. The integrated current amplifier requires
an internal bias current of 10 nA to improve bandwidth and
linearize response at low light levels. This bias generates a shot
noise component of 90 fA/√Hz at the output of the current
amplifier and establishes the noise floor of the ADPD2212.
To optimize the sensitivity of the ADPD2212, it is important to
ensure that the optical signal is concentrated on the photoactive
area of the integrated photodiode. The on-board precision
current amplifier is shielded and is not significantly affected by
light hitting its surface, but device sensitivity is based solely on
the optical power incident to the photodetector.
LINEARITY
Linearity is critical to PPG due to the need to accurately extract
a small amplitude, pulsatile ac signal modulated onto the large
dc component, which is caused by nonpulsatile tissue absorption
and ambient light. In pulsed light applications, bandwidth is a
critical component of the linearity because fast recovery of the
device from dark and/or power-down conditions can have a
profound effect on the ability of the sensor to extract the signal
of interest. The ADPD2212 is production trimmed to ensure
60 dB linearity at an irradiance of up to EE = 1600 µW/cm2, λ =
528 nm, at a supply voltage of 3.3 V.
PACKAGE CONSIDERATIONS
The ADPD2212 is packaged with a transparent epoxy molding
compound. To maintain optimum sensitivity, take care in
handling the device to prevent scratches or chemicals that may
affect the surface finish above the photodiode. Due to the lack
of stabilizing fillers (typically up to 70% silica) used in opaque
molding compounds, the maximum storage temperature of the
ADPD2212 is 105°C. The temperature profile for soldering is
shown in Figure 2.
EPAD CONNECTION
The EPAD on the ADPD2212 acts as a common electrical, thermal,
and mechanical platform for the photodiode and amplifier and
must not be connected externally. External cooling is not required
due to the extremely low power consumption of the ADPD2212.
Analog Devices, Inc., recommends removal of traces beneath the
device to eliminate potential coupling of external signals into the
sensitive internal nodes of the ADPD2212.


类似零件编号 - ADPD2212

制造商部件名数据表功能描述
logo
Analog Devices
ADPD2210 AD-ADPD2210 Datasheet
448Kb / 16P
   Ultralow noise, low power current amplifier
ADPD2210ACPZ-R7 AD-ADPD2210ACPZ-R7 Datasheet
448Kb / 16P
   Ultralow noise, low power current amplifier
ADPD2210ACPZ-RL AD-ADPD2210ACPZ-RL Datasheet
448Kb / 16P
   Ultralow noise, low power current amplifier
ADPD2211 AD-ADPD2211 Datasheet
476Kb / 14P
   Low Noise, High Sensitivity Optical Sensor
ADPD2211ACPZ-R7 AD-ADPD2211ACPZ-R7 Datasheet
476Kb / 14P
   Low Noise, High Sensitivity Optical Sensor
More results

类似说明 - ADPD2212

制造商部件名数据表功能描述
logo
Analog Devices
ADPD2211 AD-ADPD2211 Datasheet
476Kb / 14P
   Low Noise, High Sensitivity Optical Sensor
ADPD2214 AD-ADPD2214 Datasheet
477Kb / 14P
   Low Noise, High Sensitivity Optical Sensor
logo
MultiDimension Technolo...
TMR9082 MULTIDIMENSION-TMR9082 Datasheet
748Kb / 7P
   High sensitivity, Low Noise TMR Magnetic Linear Sensor
Version 1.0
TMR9002 MULTIDIMENSION-TMR9002 Datasheet
720Kb / 5P
   Ultra High Sensitivity,Ultra Low Noise TMR linear sensor
V1.0a
TMR9001 MULTIDIMENSION-TMR9001 Datasheet
645Kb / 5P
   Ultra High Sensitivity,Ultra Low Noise TMR linear sensor
V1.0a
logo
Roithner LaserTechnik G...
OP-2 ROITHNER-OP-2 Datasheet
147Kb / 2P
   High-Sensitivity Optical Power Sensors
logo
TAITIEN ELECTRONICS CO....
XO-0171-VLEU TAITIEN-XO-0171-VLEU Datasheet
285Kb / 3P
   High Frequency Very Low Noise/Low g-Sensitivity VCXO
logo
Sharp Corporation
GP2U06 SHARP-GP2U06 Datasheet
18Kb / 2P
   High Sensitivity Dust Sensor
logo
Hamamatsu Corporation
R7518 HAMAMATSU-R7518 Datasheet
196Kb / 4P
   PHOTOMULTIPLIER TUBES High Sensitivity with Low Noise Photocathode
logo
TAITIEN ELECTRONICS CO....
NA-100M-6800 TAITIEN-NA-100M-6800 Datasheet
466Kb / 4P
   100MHz Low Noise/Low G-Sensitivity OCXO
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14


数据表 下载

Go To PDF Page


链接网址




隐私政策
ALLDATASHEETCN.COM
ALLDATASHEET是否为您带来帮助?  [ DONATE ] 

关于 Alldatasheet   |   广告服务   |   联系我们   |   隐私政策   |   链接交换   |   制造商名单
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com