參數(shù)資料
型號: AD5557CRU-REEL7
廠商: ANALOG DEVICES INC
元件分類: DAC
英文描述: Dual Current Output, Parallel Input, 16-/14-Bit Multiplying DACs with 4-Quadrant Resistors
中文描述: PARALLEL, WORD INPUT LOADING, 0.5 us SETTLING TIME, 14-BIT DAC, PDSO38
封裝: MO-153BD-1, TSSOP-38
文件頁數(shù): 15/20頁
文件大?。?/td> 481K
代理商: AD5557CRU-REEL7
AD5547/AD5557
2-Quadrant Multiplying Mode, V
OUT
= 0 V to +V
REF
The AD5547/AD5557 are designed to operate with either
positive or negative reference voltages. As a result, a positive
output can be achieved with an additional op amp, (see
Figure 23); the output becomes
Rev. 0 | Page 15 of 20
V
OUT
= +
V
REF
× D/65,536 (
AD5547
) (3)
V
OUT
= +
V
REF
× D/16,384 (
AD5557
) (4)
Table 8 shows the positive output versus code for the AD5547.
Table 8. AD5547 Unipolar Mode Positive Output vs. Code
D in Binary
V
OUT
(V)
1111 1111 1111 1111
+V
REF
(65,535/65,536)
1000 0000 0000 0000
+V
REF
/2
0000 0000 0000 0001
+V
REF
(1/65,536)
0000 0000 0000 0000
0
WR
WR
RS
RS
2
LDAC
–2.5V
+2.5V
0V TO +2.5V
+5V
0
AD8628
AD8628
–V
AD5547/AD5557
C7
R
1A
16/14 DATA
VDD
R
COMA
R2
R1
R
OFSA
R
FBA
C6
RFB
ROFS
MSB A0, A1
I
OUTA
AGNDA
U2B
C4
1
μ
F
0.1
μ
F
C1
1
μ
F
C2
1
μ
F
C3
0.1
μ
F
C5
V
OUTA
V
REFA
MSB
A0, A1
LDAC
+V
GND
ADR03
4
VOUT
TRIM
5
6
VIN
U3
U2A
2
+5V
16-/14-BIT
Figure 23. Unipolar 2-Quadrant Multiplying Mode, V
OUT
= 0 to +V
REF
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