AD5382 Analog Devices, AD5382 Datasheet - Page 36

• Manufacturer Part Number: AD5382
• Description: 32-Channel 14-Bit 3 V/5 V Single-Supply Voltage-Output DAC
• Manufacturer: Analog Devices

Specifications of AD5382

• Resolution (bits): 14bit
• Dac Update Rate: 125kSPS
• Dac Settling Time: 8µs
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Voltage Out
• Dac Input Format: Par,Ser,SPI

AD5382
OPTICAL ATTENUATORS
Based on its high channel count, high resolution, monotonic
behavior, and high level of integration, the AD5382 is ideally
targeted at optical attenuation applications used in dynamic
gain equalizers, variable optical attenuators (VOA), and optical
add-drop multiplexers (OADM). In these applications, each
wavelength is individually extracted using an arrayed wave
guide; its power is monitored using a photodiode, transimped-
ance amplifier and ADC in a closed-loop control system.
DWDM
IN
FIBRE
AWG
Figure 44. OADM Using the AD5382 as Part of an Optical Attenuator
11
12
1n–1
1n
PORTS
ADD
OPTICAL
SWITCH
CONTROLLER
32-CHANNEL,
PORTS
14-BIT DAC
DROP
AD5382,
Rev. B | Page 36 of 40
ATTENUATOR
ATTENUATOR
ATTENUATOR
ATTENUATOR
The AD5382 controls the optical attenuator for each wavelength,
ensuring that the power is equalized in all wavelengths before
being multiplexed onto the fiber. This prevents information loss
and saturation from occurring at amplification stages further
along the fiber.
N:1 MULTIPLEXER
16-BIT ADC
PHOTODIODES
TIA/LOG AMP
(AD8304/AD8305)
ADG731
(32:1 MUX)
AD7671
(0V TO 5V, 1MSPS)
AWG
FIBRE
DWDM
OUT