The ADPD2210ACPZ-R7 from Analog Devices 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.
Feature
- Ultralow noise, low power current amplifier
- 80 fA/√Hz (typical) noise floor
- 140 μA (typical) of supply current when active (EE = 0 μW/cm2)
- 100 nA (typical) of supply current in standby
- Flexible output configuration
- Optimized for pulsed systems
- Nominal linear output: 240 μA
- Space-saving 2 mm × 2 mm LFCSP package
Applications
- Photoplethysmography
- Photodiode measurements
- Small current pulsed amperometry
Any application requiring the ultralow noise amplification of small currents
(Picture: Pinout)
