參數(shù)資料
型號(hào): DAC8413FP
廠(chǎng)商: ANALOG DEVICES INC
元件分類(lèi): DAC
英文描述: Quad, 12-Bit DAC Voltage Output with Readback
中文描述: QUAD, PARALLEL, WORD INPUT LOADING, 10 us SETTLING TIME, 12-BIT DAC, PDIP28
封裝: PLASTIC, MS-001, DIP-28
文件頁(yè)數(shù): 12/14頁(yè)
文件大?。?/td> 443K
代理商: DAC8413FP
DAC8412/DAC8413
–12–
REV. D
Careful attention to grounding is important to accurate opera-
tion of the DAC8412. This is not because the DAC8412 is
more sensitive than other 12-bit DACs, but because with four
outputs and two references there is greater potential for ground
loops. Since the DAC8412 has no analog ground, the ground
must be specified with respect to the reference.
Reference Configurations
Output voltage ranges can be configured as either unipolar or
bipolar, and within these choices a wide variety of options exists.
The unipolar configuration can be either positive or negative
voltage output, and the bipolar configuration can be either sym-
metrical or nonsymmetrical.
OP-400
REF10
+15V
INPUT
OUTPUT
TRIM
10k
V
REFH
0.2 F
V
REFL
+10V OPERATION
+
+15V
DAC8412
OR
DAC8413
V
SS
0.1 F
//10 F
V
DD
15V
Figure 36. Unipolar +10 V Operation
DAC A
DAC B
DAC C
DAC D
OUTPUT
REGISTER
WRDB0
WRDB1
WRDB2
WRDB3
WRDB4
WRDB5
WRDB6
WRDB7
WRDB8
WRDB9
WRDB10
RDDACB
INPUT
REGISTER
RDDACC
RDDACA
WRDACA
WRDACB
WRDACC
RDDACD
WRDACD
WRDB11
READBACKDATAIN_DB10
READOUT
READOUTBAR
READBACKDATAIN_DB11
READBACK
DATAOUT_DB11
V
LOGIC
DB11..DB0
R/
W
A1
A0
CS
V
REFH
V
DD
V
SS
V
OUTA
V
OUTB
V
OUTC
V
OUTD
V
REFL
LDAC
RESET
DGND
Figure 35. Simplified I/O Logic Diagram
+15V
1 F
0.2 F
AD688
FOR 10V
AD588
FOR 5V
39k
6.2
6.2
BALANCE
100k
GAIN
100k
0.2 F
0.1 F
//10 F
DAC8412
OR
DAC8413
V
REFH
V
REFL
V
DD
V
SS
+15V
15V
5 OR 10V OPERATION
Figure 37. Symmetrical Bipolar Operation
Figure 37 (Symmetrical Bipolar Operation) shows the DAC8412
configured for
±
10 V operation.
Note: See the AD688 data
sheet for a full explanation of reference operation.
Adjustments may
not be required for many applications since the AD688 is a very
high accuracy reference. However if additional adjustments are
required, adjust the DAC8412 full scale first. Begin by loading
the digital full-scale code (FFF
H
), and then adjust the Gain
Adjust potentiometer to attain a DAC output voltage of 9.9976 V.
Then, adjust the Balance Adjust to set the center scale output
voltage to 0.000 V.
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