Texas Instruments DAC7741EVM, User Manual

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ti
12500 TI Boulevard. Dallas, Texas 75243
Title:
SHEET: OF:
FILE: SIZE: DATE:
REV:
10-May-2005
Drawn By:
Engineer:
Revision History
REV ECN Number Approved
DAC7741_Sheet1.Sch
DOCUMENTCONTROL #
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
VSS VCC +3.3VD
-5VA VCC +3.3VA +5VD
W11
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
J4
RSTSEL
HPA449_RST
LDAC
WR
DC_CSa#
1 2
3 4
5 6
7 8
9 10
J6
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
J3
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
J1
CONNECTORS AND LOGIC
C
1
J. PARGUIAN
VSS
+5VD
+REFin
REFen
2
R13
10k
R14
10k
+5VD
W16 W17
6443168
+5VA +1.8VD +3.3VD
1 2 3
J11
1 2 3
J12
5
6
7
U4B
OPA2227UA
OE1
1
A1
2
A2
3
A3
4
A4
5
A5
6
A6
7
A7
8
A8
9
GND
10
Y8
11
Y7
12
Y6
13
Y5
14
Y4
15
Y3
16
Y2
17
Y1
18
OE2
19
VCC
20
U5
SN74AHC541
C16
0.1µF
C17
0.1µF
C20
0.1µF C21
0.1µF
C19
0.1µF
R17
10K
R16
10K
W20
W21
+5VD
W19
W12
DSP_LDAC
RD
DSP_RST
LDAC_B
R/W_B
RST_B
RSTSEL_B
REFen_B
RST
RSTSEL
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB8
DB9
DB10
DB11
DB12
DB13
DB14
DB15
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
W18
+5VD
+5VD
+5VD
+5VD
+3.3VD
+5VD
1DIR
1
1B1
2
1B2
3
GND
4
1B3
5
1B4
6
VCC
7
1B5
8
1B6
9
GND
10
1B7
11
1B8
12
2B1
13
2B2
14
GND
15
2B3
16
2B4
17
VCC
18
2B5
19
2B6
20
GND
21
2B7
22
2B8
23
2DIR
24
2G
25
2A8
26
2A7
27
GND
28
2A6
29
2A5
30
VCC
31
2A4
32
2A3
33
GND
34
2A2
35
2A1
36
1A8
37
1A7
38
GND
39
1A6
40
1A5
41
VCC
42
1A4
43
1A3
44
GND
45
1A2
46
1A1
47
1G
48
U6
SN74ALVC164245
R18
10K
R/W_B
DIR
DIR
EN
EN
W22
DIR
W23
VCCA
VCCA
RD
2 4
5
3
U8
SN74AHC1G04
5
3
U7
SN74AHC1G08
DSP_R/W
A0
A1
A2
A
1
B
2
C
3
G1
6
G2A
4
G2B
5
Y0
15
Y1
14
Y2
13
Y3
12
Y4
11
Y5
10
Y6
9
Y7
7
VC
C
16
GND
8
U10
SN74AHC138
+3.3VD
A0
A1
A2
+3.3VD
C18
0.1µF
W26
W27
W28
W24
W25
C6x_RD
C6x_WR
CE
DC_CSa#
DSP_CS
WR
DSP_R/W
DSP_LDAC
DSP_RST
CS
R/W
DC_CSa#
RST
+3.3VD
C22
0.1µF
W29
DC_CSa#
In1
1
GND
2
In0
3
Y
4
VCC
5
In2
6
U9
SN74AUP1G57
+3.3VD
C23
0.1µF
DSP_CS
(HPA449_R/W)
(HPA449_LDAC)
(HPA449_CS)
HPA449_RST
RSTSEL
REFen
+5VD
R4
10K
[DB15..DB0]
Control_Signals
[DB15..DB0]
OUTPUT
DAC7741
DAC7741_Sheet2.Sch
[DB15..DB0]
Control_Signals
Control_Signals
CS_B
U2_VOUT W30
W31
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
20
17
19 18
J2
(HPA449_LDAC)
(HPA449_R/W)
(HPA449_CS)
A Original Release
B Added Logic to accomodate 5-6K card
C
Added option of selecting output
terminal and corrected DSP CS &
R/nW logic.
(HPA449_CS)