Photodiode with TIA and Optical BPF Filter 800nm-900nm




Photodiode with TIA and Optical BPF Filter 800nm-900nm

Wavelength range: 800 – 900 nm
Active Area:≥ 4.5mm Dia
Responsivity (@ 850nm with Filter):≥ 0.5 A/W
Dark Current (-10V):≤ 0.5 nA
Package:TO Package
Max. Reverse Voltage:≥ 25 V
Operating temperature:0 to +55 °C
Storage Temperature:0 to +60 °C
Supply voltage:≤ ±15V
Quiescent Supply Current (±15V):≤ 3 mA
Input offset Voltage:≤ 0.5 mV
Gain Bandwidth Product:≥ 5 MHz
Open loop gain:≥ 200 V/mV
Input noise Voltage density (@100Hz):≤ 20 nV/Hz0.5
Input noise Voltage density (@1KHz):≤ 15 nV/Hz0.5
Input noise current density (@1KHz):≤ 10 fA/Hz0.5
Transmission @AOI=0ᵒ, 800-900nm:>90%
Blocking @AOI=0ᵒ, 350-750nm & 950-1100nm:≤0.1% (OD3)
Full Width Half Maximum (FWHM) @ AOI=0ᵒ:100nm ± 10nm
Center Wavelength:850nm ± 10nm

The use of TIAs in photo sensing circuits

Photo sensing circuits such as transimpedance amplifiers (TIAs) are useful in precision systems such as computed tomography (CT) scanners, blood analyzers, and smoke detectors. Other uses for light-to-voltage conversions are with position sensors, infrared (IR) pyrometers, and chromatographs. In these circuits, photodiodes generate a small current, which is proportional to the level of illumination.

The TIA converts the photodiode’s current output signal to a usable voltage level. The implementation of this current-to-voltage conversion consists of a photodiode, an amplifier and a resistor/capacitor feedback pair (Figure 1).