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Ultra-Low-Noise Current and Optical Sensing Amplifiers

The photodiodes from Analog Devices amplify sensor signal currents by a factor of 24 while adding minimal noise

Image of Analog Devices Ultra-Low-Noise Current and Optical Sensing AmplifiersThe ADPD2210 from ADI's is a low-noise current amplifier designed to allow the use of smaller photodiodes by amplifying sensor signal currents by a factor of 24 while adding minimal noise. This amplification provides the system sensitivity of a large photodiode with the benefits of a smaller photodiode. A minimum linearity of 60 dB allows accurate extraction of very small, time-variant signals on top of large DC or low-frequency offsets. The ADPD2211/ADPD2212/ADPD2214 are optical sensors optimized for biomedical applications. Very low power consumption and near theoretical signal-to-noise ratio (SNR) are achieved by packaging an ultra-low-capacitance, deep-junction silicon photodiode operated in zero-bias photoconductive mode with a low-noise current amplifier.

Applications
  • Medical
    • Heart rate
    • Chemical analysis
  • Hand-held, battery-powered applications
  • Fitness equipment
    • Treadmills
    • Elliptical machines
Product Features ADPD2210 ADPD2211 ADPD2212 ADPD2214
Current Gain 24 24 24 24
Noise Floor, Input Referred 80 fA/√Hz 90 fA/√Hz 90 fA/√Hz 90 fA/√Hz
Photodiode Area None 1.8 mm² 2.5 mm² 4.5 mm²
Bandwidth 85 kHz 400 kHz 400 kHz 75 kHz
Integration Level Amplifier only - bring your own photodiode Amplifier and photodiode Amplifier, photodiode, and optical rectifier Amplifier, photodiode, and optical rectifier
Optical Filter N/A None IR cut Green band-pass
Power Supply 1.8 V to 5.0 V 1.8 V to 5.0 V 1.8 V to 5.0 V 1.8 V to 5.0 V
Package 2 mm x 2 mm LFCSP 3 mm x 3 mm clear mold LFCSP 3 mm x 4 mm clear mold LFCSP 4 mm x 4 mm clear mold LFCSP

Eval Boards

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
EVAL BOARD FOR ADPD2210EVALZ-ADPD2210EVAL BOARD FOR ADPD22102 - ImmediateView Details
EVAL BOARD FOR ADPD2211EVALZ-ADPD2211EVAL BOARD FOR ADPD22115 - ImmediateView Details
EVAL BOARD FOR ADPD2212EVALZ-ADPD2212EVAL BOARD FOR ADPD22121 - ImmediateView Details
EVAL BOARD FOR ADPD2214EVALZ-ADPD2214EVAL BOARD FOR ADPD22142 - ImmediateView Details

ADPD2210

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC AMPLIFIER 6LFCSPADPD2210ACPZ-R7IC AMPLIFIER 6LFCSP0View Details

ADPD2211

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
SENSOR OPT 528NM AMBIENT 8LFCSPADPD2211ACPZ-R7SENSOR OPT 528NM AMBIENT 8LFCSP1015 - ImmediateView Details

ADPD2212

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
SENSOR OPT 528NM AMBIENT 10LFCSPADPD2212ACPZ-R7SENSOR OPT 528NM AMBIENT 10LFCSP0View Details

ADPD2214

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
SENSOR OPT 528NM AMBIENT 10LFCSPADPD2214ACPZ-R7SENSOR OPT 528NM AMBIENT 10LFCSP0View Details
Published: 2016-10-12