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DAC11001A Datasheet(PDF) 34 Page - Texas Instruments

No. de Pieza. DAC11001A
Descripción  DACx1001 20-Bit, 18-Bit, and 16-Bit, Low-Noise, Ultra-Low Harmonic Distortion, Fast-Settling, High-Voltage Output, Digital-to-Analog Converters (DACs)
Descarga  42 Pages
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Fabricante  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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DAC11001A Datasheet(HTML) 34 Page - Texas Instruments

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DAC110 01
C1
C2
VREFP1
VREFN1
REFNF
REFNS
REFPF
REFPS
+
±
+
±
+
±
VOUT1
REFGND1
DGND
AGND
AGND-OUT1
Sing le-poin t sh ort
commo n to all DA Cs
Reference
Gen eration
Circuit
Loa d
Circuit
Sign al
Input
+
±
AGND
+
±
DGND
IOVDD
+
±
AGND
Ana log
power
inpu ts
+
±
AGND
AGND
LOA D-GND1
Sing le-poin t sh ort
DAC110 01
C3
C4
VREFP2
VREFN2
REFNF
REFNS
REFPF
REFPS
+
±
+
±
+
±
VOUT2
REFGND2
DGND
AGND
AGND-OUT2
Reference
Gen eration
Circuit
Loa d
Circuit
Sign al
Input
+
±
AGND
+
±
DGND
IOVDD
+
±
AGND
Ana log
power
inpu ts
+
±
AGND
AGND
LOA D-GND2
Sing le-poin t sh ort
ICROS STALK = 0
ICROS STALK = 0
AGND sha red
across DACs,
referen ces, and
load s
DGND
AGND
Kelvin connection
close to th e p in
Kelvin connection
close to th e p in
DGND shared
across DACs
DAC110 01
C1
C2
VREFP
VREFN
REFNF
REFNS
REFPF
REFPS
+
±
+
±
+
±
VOUT
REFGND
DGND
AGND
AGND-OUT
Sing le-poin t sh ort
Reference
Gen eration
Circuit
Loa d
Circuit
Sign al
Input
+
±
AGND
+
±
DGND
IOVDD
+
±
AGND
Ana log
power
inpu ts
+
±
AGND
AGND
LOA D-GND
Sing le-poin t sh ort
Kelvin connection
close to th e p in
AGND sha red betwe en
DAC an d r efe rence
AGND sha red betwe en
DAC an d l oad
34
DAC11001A, DAC91001, DAC81001
SLASEL0 – OCTOBER 2019
www.ti.com
Product Folder Links: DAC11001A DAC91001 DAC81001
Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated
Figure 26. Connecting the Reference Ground
Channel-to-channel dc crosstalk is a major concern in multichannel applications, such as battery test equipment.
While the DACx1001 is single-channel, the crosstalk problem can appear at a system level when using multiple
DACx1001 devices. The problem becomes severe when the grounds of the loads are shorted together creating a
possible ground loop. In such cases, avoid the local short between AGND and AGND-OUT. Use a single short
between AGND and DGND for all the DACs. If the PCB layout allows for the digital signal and analog power
supplies to be kept separate, DGND and AGND can be combined to a single ground plane. Figure 27 shows an
example circuit for minimizing dc crosstalk across DAC channels in a system.
Figure 27. Minimizing Multichannel DC Crosstalk


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