DAC1617D1G0HN IDT [Integrated Device Technology], DAC1617D1G0HN Datasheet - Page 39

• 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
10.19 Auxiliary DACs
The cascode source configuration increases the output impedance of the source, which
improves the dynamic performance of the DAC because there is less distortion.
Depending on the application, the various stages and the targeted performances, the
device can be used for an output level of up to 2 V (p-p).
The DAC1617D1G0 integrates two auxiliary DACs, which are used to compensate any
offset between the DACs and the next stage in the transmission path. Both auxiliary DACs
have a 10-bit resolution and are current sources (referenced to ground).
The full-scale output current for each DAC is the sum of the two complementary current
outputs:
The output current depends on the digital input data set by SPI registers
DAC_A_Aux_MSB (bits AUX_A[9:0]) and DAC_B_Aux_MSB (bits AUX_B[9:0]; see
Table 33).
I
I
I
I
AUXAP
AUXAN
AUXBP
AUXBN
Fig 28. Equivalent analog output circuit
•
•
I
I
OAUXA fs
OAUXB fs
=
=
=
=
I
I
I
I
 
 
OAUXA fs
OAUXA fs
OAUXB fs
OAUXB fs
=
=
I
I
 
 
 
 
AUXAP
AUXBP












DATAA
------------------- -
DATAB
------------------- -
1023 DATAA
------------------------------------- -
1023 DATAB
------------------------------------- -
Rev. 03 — 2 July 2012
+
+
1023
1023
I
I
Dual 16-bit DAC: up to 1 Gsps; x2, x4 and x8 interpolating
AUXAN
AUXBN
1023
1023
–
–
GND




IOUTAP/IOUTBP




3.3 V
R L
GND
3.3 V
IOUTAN/IOUTBN
R L
DAC1617D1G0
001aan835
© IDT 2012. All rights reserved.
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