TPCE636 User Manual Issue 1.0.2
Page 65 of 104
Parallel DAC Interface
7.10
7.10.1 Overview
The 16 analog DAC outputs of the TPCE636 are realized with eight AD5547 16bit Dual-Current DAC
devices. Each of these DACs has two DAC channels. Thus, a total of 16 DAC channels are available on the
TPCE636. Because of current output DACs it is necessary to use operational amplifier for each DAC output
channel to generate an output voltage range up to ±10V.
Figure 7-10 : Analog Output Section
As programming interface, a 16bit parallel Bus is implemented. Respectively four DAC devices (8 DAC
channels) share this Kintex-7 16bit data bus. To set each output individually each DAC device has its control
interface.
The following figure shows the structure and principle of two DAC outputs. Both are connected via
independent operational amplifiers to the TPCE636 I/O Connector.
Figure 7-11 : Analog Output Section
The key-features of the TPCE636 DAC Interface are:
16bit Resolution
Built-in 4-quadrant resistors in combination with an operational amplifier allow ±10V outputs
Outputs Drive
±
10mA per channel
Capacitive Load Driving = 1000pF