For this application, the design
requirements are as follows:
- VS+ = 5V, VS– = –5V, VCM =
GND, REFA = GND
- IREF (1μA) connected to
I2
- Input current range: 10nA ≤
I1 ≤ 100μA
- Photodiode: GP8195-12
- VR =
5V
- 20pA dark current
(typical)
- 1pF typical
capacitance (1.5pF maximum)
- Spectral response
range from λ = 0.9μm to λ = 1.7μm
For bench testing of the system, the
following configuration is used:
- Laser diode: LPS-1310-FC
- λ = 1.31μm
- Threshold current 5mA
to 20mA
- Current control mode
used
- Laser controller: THOR
CLD1010
- Variable attenuator:
VOA50-FC-SM 50dB in-line
- External modulation: Agilent
33500 30MHz waveform generator