DAC1617D1G0HN IDT [Integrated Device Technology], DAC1617D1G0HN Datasheet - Page 45

• Manufacturer Part Number: DAC1617D1G0HN
• Description: Dual 16-bit DAC, LVDS interface, up to 1 Gsps, x2, x4 and x8 interpolating
• Manufacturer: IDT [Integrated Device Technology]

Integrated Device Technology
DAC1617D1G0 3
Preliminary data sheet
10.20.4 IQ-modulator - AC interface
10.21.1 Power and grounding
10.21 Design recommendations
Use the DAC1617D1G0 AC-coupled when the IQ-modulator common-mode voltage is
close to ground. The auxiliary DACs are required for local oscillator cancelation.
Figure 35 shows an example of a connection to an IQ-modulator with a 0.5 V common
input level and auxiliary DACs.
Use a separate power supply regulator for the generation of the 1.8 V analog power
(pins 65, 62, 55, 69, 72 and 58) and the 1.8 V digital power (pins 12, 19, 36, 26 and 43) to
ensure optimal performance.
Also, include individual LC decoupling for the following six sets of power pins:
Use at least two capacitors for each power pin decoupling. Locate these capacitors as
close as possible to the DAC1617D1G0 power pins.
The die pad is used for both the power dissipation and electrical grounding. Insert several
vias (7  7 typical) to connect the internal ground plane to the top layer die area.
Fig 35. IQ-modulator: AC interface with a 0.5 V common input level and auxiliary DACs
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•
•
•
•
V
V
V
V
V
DDA(1V8)_P1
DDA(1V8)_P2
DDA(1V8)
DDD
DDA(3V3)
(pins 12, 19, 26, 36, and 43)
(pins 55, 69, 72 and 58)
(pins 59 and 68)
(pin 62)
(pin 65)
Rev. 03 — 2 July 2012
Dual 16-bit DAC: up to 1 Gsps; x2, x4 and x8 interpolating
DAC1617D1G0
© IDT 2012. All rights reserved.
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