DAC1617D1G0HN IDT [Integrated Device Technology], DAC1617D1G0HN Datasheet - Page 42

• 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
10.20.2 Low input impedance IQ-modulator interface
10.20.3 IQ-modulator - DC interface
The DAC1617D1G0 can be easily connected to low input impedance IQ-modulators. The
image of the local oscillator can be canceled using the digital offset control in the device.
Figure 31 shows an example of a connection between the DAC1617D1G0 and a low input
impedance modulator.
When the system operation requires to keep the DC component of the spectrum, the
DAC1617D1G0 can use a DC interface to connect an IQ-modulator. In this case, the
image of the local oscillator can be canceled using the digital offset control in the device.
Fig 30. 2 V (p-p) differential output with transformer
Fig 31. DAC1617D1G0 with low input impedance IQ-modulator
(1) If R
(2) If R
int
int
IOUTAN/IOUTBN
IOUTAP/IOUTBP
= 100 , then R
= 200  , then R
AUXAN/AUXBN
AUXAP/AUXBP
DAC
Rev. 03 — 2 July 2012
ext
Dual 16-bit DAC: up to 1 Gsps; x2, x4 and x8 interpolating
ext
= not connected
IOUTAP/IOUTAN
IOUTBP/IOUTBN
V
V
0 mA to 20 mA
= 200 
O(cm)
O(dif)
50 Ω
3.3 V
= 1 V
= 2.7 V
50 Ω
low pass
filter
R ext
DAC1617D1G0
IQ modulator
R
interface(To be updated)
BBAN/BBBN
BBAP/BBBP
R int
int
aaa-002450
= 100 Ω/200 Ω
© IDT 2012. All rights reserved.
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