adl5317 Analog Devices, Inc., adl5317 Datasheet - Page 14

• Manufacturer Part Number: adl5317
• Description: Avalanche Photodiode Bias Controller And Wide Range 5 Na To 5 Ma Current Monitor
• Manufacturer: Analog Devices, Inc.

ADL5317
EVALUATION BOARD
Table 4. Evaluation Board Configuration Options
Component
VPHV, VPLV,
GND
VSET
R11, C8
VAPD, L1, C9
IPDM, R1
R7, R8, R9,
R10, C6, C7,
C10
VPLV, W1,
W2, R3
VCLH, W1,
C4, R6
FALT, R2
C1, C2, C3,
C5, R4, R5
Function
High and Low Voltage Supply and Ground Pins.
APD Bias Voltage Setting Pin. The dc voltage applied to VSET determines the APD bias
voltage at VAPD. V
APD Input Compensation. Provides essential high frequency compensation at the VAPD
input pin.
Input Interface. The evaluation board is configured to accept an input current at the SMA
connector labeled VAPD. Filtering of this current can be done using L1 and C9.
Mirror Interface. The output current at the SMA connector labeled IPDM is 1/5 the value at
VAPD. R1 allows a resistor to be installed for applications where a scaled voltage referenced
to I
Guard Options. By populating R9 and/or R10, the shell of the VAPD SMA connector is set to
the GARD potential. R7 and R8 are installed so that the guard potential can be driven by an
external source, such as the VSUM potential of the Analog Devices optical log amps. C7
filters noise from the VSET interface and provides a high frequency ac path to ground.
Additional filtering is possible by installing a capacitor at C10. C10 should equal C7.
Optional Supply Tracking Mode. Connecting Jumper W2 and opening Jumper W1 places
the ADL5317 into supply tracking mode. In this mode, the voltage at VAPD is typically 2 V
below V
Extended Linear Operating Range. Closing W1 connects Pin VPHV and Pin VCLH. This allows
for an extended linear control range of V
FALT Interface. R2 is a resistive pull-up that is used to create the logic signal at FALT.
Supply Filtering/Decoupling.
APD
instead of a current is desirable.
PHV
. R3 = 100 kΩ for V
APD
= 30 × V
PLV
SET
> 5.5 V.
.
APD
using V
Rev. 0 | Page 14 of 16
SET
.
Default Condition
Not Applicable
Not Applicable
C8 = 1 nF (size 0603)
R11 = 1 kΩ (size 0603)
L1 = 0 Ω (size 0805)
C9 = open (size 0805)
R1 = open (size 1206)
R7 = R8 = 0 Ω (size 0402)
R9 = R10 = open (size 0402)
C7 = 0.01 μF (size 0805)
C6 = C10 = open (size 0402)
R3 = 0 Ω (size 0402)
W1 = open
W2 = closed
W1 = closed
C4 = open (size 0805)
R6 = 0 Ω (size 0402)
C3 = 0.1 μF (size 0603)
C5 = 0.1 μF (size 1206)
R4 = R5 = 0 Ω (size 0402)
R2 = 10 kΩ (size 0603)
C1 = C2 = 0.01 μF (size 0402)