AD5384 Analog Devices, AD5384 Datasheet - Page 34

• Manufacturer Part Number: AD5384
• Description: 40-Channel, 3 V/5 V Single Supply,14-Bit, Serial Voltage-Output DAC
• Manufacturer: Analog Devices

Specifications of AD5384

• 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: I2C/Ser 2-wire,Ser,SPI

AD5384
OPTICAL ATTENUATORS
Based on its high channel count, high resolution, monotonic
behavior, and high level of integration, the AD5384 is ideally
targeted at optical attenuation applications used in dynamic
gain equalizers, variable optical attenuators (VOA), and optical
add-drop multiplexers (OADMs). In these applications, each
wavelength is individually extracted using an arrayed wave
guide; its power is monitored using a photodiode, transimped-
ance amplifier, and an ADC in a closed-loop control system.
DWDM
IN
FIBRE
AWG
Figure 39. OADM Using the AD5384 as Part of an Optical Attenuator
11
12
1n–1
1n
PORTS
ADD
OPTICAL
SWITCH
40-CHANNEL,
14-BIT DAC
CONTROLLER
PORTS
DROP
AD5384,
Rev. A | Page 34 of 36
ATTENUATOR
ATTENUATOR
ATTENUATOR
ATTENUATOR
The AD5384 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
(40:1 MUX)
AD7671
(0-5V, 1MSPS)
AWG
FIBRE
DWDM
OUT