參數(shù)資料
型號： AD5547BRU-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, 16-BIT DAC, PDSO38
封裝： MO-153BD-1, TSSOP-38
文件頁數(shù)： 6/20頁
文件大?。?/td> 481K
代理商： AD5547BRU-REEL7
AD5547/AD5557
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
Rev. 0 | Page 6 of 20
AD5547
TOP VIEW
(Not to Scale)
D1
1
D0
2
R
OFSA
R
FBA
R
1A
R
COMA
3
4
5
V
REFA
I
OUTA
AGNDA
7
8
9
DGND
10
AGNDA
11
I
OUTB12
V
REFB
R
COMB
R
1B
R
FBB
R
OFSB
WR
13
14
15
16
17
18
A0
19
D2
38
D3
37
D4
36
D5
35
D6
34
D7
33
D8
32
D9
31
D10
30
VDD
29
D11
28
D12
27
D13
26
D14
25
D15
24
23
MSB
22
LDAC
21
A1
20
6
RS
0
NC
1
NC
2
R
OFSA
R
FBA
R
1A
R
COMA
3
4
5
V
REFA
I
OUTA
AGNDA
7
8
9
DGND
10
AGNDB
11
I
OUTB
V
REFB
R
COMB
R
1B
R
FBB
R
OFSB
WR
12
13
14
15
16
17
18
A0
19
6
NC = NO CONNECT
D0
38
D1
37
D2
36
D3
35
D4
34
D5
33
D6
32
D7
31
D8
30
VDD
29
D9
28
D10
27
D11
26
D12
25
D13
24
23
MSB
22
LDAC
21
A1
20
RS
0
AD5557
TOP VIEW
(Not to Scale)
Figure 4. AD5547 TSSOP-38 Pin Configuration
Figure 5. AD5557 TSSOP-38 Pin Configuration
Table 3. AD5547 Pin Function Descriptions
Pin No.
Mnemonic
1, 2, 24–
28, 30–38
3
R
OFSA
Function
Digital Input Data Bits D0 to D15. Signal level must be ≤ V
DD
+ 0.3 V.
D0–D15
Bipolar Offset Resistor A. Accepts up to ±18 V. In 2-quadrant mode, R
OFSA
ties to R
FBA
. In 4-quadrant mode, R
OFSA
ties to R
1A
and the external reference.
Internal Matching Feedback Resistor A. Connects to the external op amp for I-V conversion.
4-Quandrant Resistor. In 2-quadrant mode, R
1A
shorts to the V
REFA
pin. In 4-quadrant mode, R
1A
ties to R
OFSA
. Do
not connect when operating in unipolar mode.
Center Tap Point of the Two 4-Quadrant Resistors, R
1A
and R
2A
. In 4-quadrant mode, R
COMA
ties to the inverting
node of the reference amplifier. In 2-quadrant mode, R
COMA
shorts to the VREF pin. Do not connect if operating in
unipolar mode.
DAC A Reference Input in 2-Quadrant Mode, R2 Terminal in 4-Quadrant Mode. In 2-quadrant mode, V
REFA
is the
reference input with constant input resistance versus code. In 4-quadrant mode, V
REFA
is driven by the external
reference amplifier.
DAC A Current Output. Connects to the inverting terminal of external precision I-V op amp for voltage output.
DAC A Analog Ground.
Digital Ground.
DAC B Analog Ground.
DAC B Current Output. Connects to inverting terminal of external precision I-V op amp for voltage output.
DAC B Reference Input Pin. Establishes DAC full-scale voltage. Constant input resistance versus code. If
configured with an external op amp for 4-quadrant multiplying, V
REFB
becomes –V
REF
.
Center Tap Point of the Two 4-Quadrant Resistors, R
1B
and R
2B
. In 4-quadrant mode, R
COMB
ties to the inverting
node of the reference amplifier. In 2-quadrant mode, R
COMB
shorts to the VREF pin. Do not connect if operating in
unipolar mode.
4-Quandrant Resistor. In 2-quadrant mode, R
1B
shorts to the V
REFB
pin. In 4-quadrant mode, R
1B
ties to R
OFSB
. Do not
connect if operating in unipolar mode.
Internal Matching Feedback Resistor B. Connects to external op amp for I-V conversion.
Bipolar Offset Resistor B. Accepts up to ±18 V. In 2-quadrant mode, R
OFSB
ties to R
FBB
. In 4-quadrant mode, R
OFSB
ties to R
1B
and an external reference.
4
5
R
FBA
R
1A
6
R
COMA
7
V
REFA
8
9
10
11
12
13
I
OUTA
AGNDA
DGND
AGNDB
I
OUTB
V
REFB
14
R
COMB
15
R
1B
16
17
R
FBB
R
OFSB
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