Datasheet

U8
MAX1840
U9
MAX1840
U10
MAX1840
C30 1µF
9
C31
1µF
2
6
GND
RST
CLK
IO
RIN
DVCC VCC
CIN DATA SHDN
IN
7 8 10
U1_MOSI U1_SCL U1_SDA
IN IN
+3.3V +3.3V VDDIO +3.3V +3.3V VDDIO
IN
4 3
R18
1.5kI
U2_SDA
U2_SCL
1 5
+3.3V +3.3V +3.3V
IN
R24
1.5kI
U2_MOSI
IN
R19
1.5kI
IN
C32 1µF
9
C33
1µF
2
6
GND
RST
CLK
IO
RIN
DVCC VCC
CIN DATA SHDN
IN
7 8 10
U1_CLRB U1_LDACB U1_MISO
IN IN
4 3
R20
1.5kI
U2_MISO
MAXQ_K2
1 5
IN
R23
1.5kI
MAXQ_K1
IN
R21
1.5kI
IN
C34 1µF
9
C35
1µF
2
6
GND
RST
CLK
IO
RIN
DVCC VCC
CIN DATA SHDN
IN
7 8 10
U1_CSB U1_SCLK U1_IRQB
IN IN
4 3
R22
1.5kI
MAXQ_K3
U2_SCLK
1 5
IN
R25
1.5kI
U2_CSB
IN
R26
1.5kI
IN
GND
IN
CSB
H2
1221
IN
SCLK
33
IN
DIN
55
IN
DOUT
VDDIO
77
99
IN
U1_IRQB
CLR
LDAC
1111
13
IN
1515
13
IN
1717
44 66 88
10 10 12 12 14 14 16 16 18 18
C2 0.1µF
C1 10µF
VDD
10 19
VDD
GND
DAC0
2
DAC0
C6
OPEN
3
DAC1
C7
OPEN
4
DAC2
C8
OPEN
5
DAC3
C9
OPEN
6
DAC4
C37
OPEN
7
DAC5
C38
OPEN
8
DAC6
C39
OPEN
9
DAC7
C40
OPEN
DAC1 DAC2 DAC3 DAC4 DAC5 DAC6 DAC7
ININ
IN
CSB
JU1
U1_CSB U1_SDA
JU7
VDDIO VDDIO VDDIO VDDIO VDDIOR1
4.7kI
1
21
215 3
1
IN
IN
IN
SCLK
JU2
U1_SCLK U1_SCL
JU8
R2
4.7kI
1
21
2
14
3
IN
1
INDIN
JU3
2
3
4
U1_MOSI
13
IN
INCLR
R3
1MI
JU6
VDDIO
21
17
IN
U1_CLRB
R29
100kI
JU12
VDD
21
20
1
INDOUT
JU4
2
3
4
U1_MISO
12
VDDIO
C3
0.1µF
11 16
IN
VDDIO
R28
4.7kI
U1_IRQB
IRQ
IN
1
JU5
2
3
4
U1_LDACB
IN
LDAC
18
M/Z LDAC IRQ CLR VDDIO DOUT DIN SCLK CSB REF
REF
1236
7
5 8
I.C.
N.C. OUT
TRIM
I.C. IN TEMP GND
C5
0.1µF
3 2 4 1
JU14
21
JU11
REF_EXT
GND
C36
0.1µF
C4
100pF
GND GND
3
VDD
21
JU10
VDD_EXT
GND
+3.3V
321
JU13
321
JU9
VDDIO_EXT
GND
GNDS
U1
MAX5725A
U7
MAX6173
+3.3V +3.3V VDDIO
IN
+5V
VDDIO
+3.3V
________________________________________________________________ Maxim Integrated Products 11
Evaluates: MAX5723/MAX5724/
MAX5725A/MAX5725B
MAX5725A Evaluation Kit
Figure 7a. MAX5725A EV Kit Schematic (Sheet 1 of 2)