Post on 08-Aug-2020
Evaluation Board User GuideUG-243
One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Evaluation Board for the AD5172 Digital Potentiometer
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 16
FEATURES Full-featured evaluation board for the AD5172 Various test circuits Various ac/dc input signals PC control via a separately purchased system development
platform (SDP) PC software for control Resistor tolerance error stored in EEMEM
PACKAGE CONTENTS EVAL-AD5172SDZ board CD that includes
Self-installing software that allows users to control the board and exercise all functions of the device
Electronic version of the AD5172 data sheet Electronic version of the UG-243 user guide
GENERAL DESCRIPTION This user guide describes the evaluation board for evaluating the AD5172, a dual-channel, 256-position, one-time programmable (OTP) memory digital potentiometer that employ fuse link technology to achieve memory retention of resistance settings.
The on-board socket allows the user to easily replace the device for reprogramming of the OTP memory.
The AD5172 supports a single-supply 2.7 V to 5.5 V operation, making the device suited for battery-powered applications and many other applications with a superior low temperature coefficient performance.
In addition, the AD5172 uses a versatile I2C serial interface that operates in fast mode, allowing speeds of up to 400 kHz.
The EVAL-AD5172SDZ can operate in single-supply mode and incorporates an internal power supply from the USB.
Complete specifications for the AD5172 part can be found in the AD5172 data sheet, which is available from Analog Devices, Inc., and should be consulted in conjunction with this user guide when using the evaluation board.
DIGITAL PICTURE OF EVALUATION BOARD WITH SYSTEM DEVELOPMENT PLATFORM
EVAL-AD5172SDZ
SYSTEM DEVELOPMENTPLATFORM
0961
0-00
1
Figure 1.
UG-243 Evaluation Board User Guide
Rev. 0 | Page 2 of 16
TABLE OF CONTENTS Features .............................................................................................. 1
Package Contents.............................................................................. 1
General Description ......................................................................... 1
Digital Picture of Evaluation Board with System Development Platform ............................................................................................. 1
Revision History ............................................................................... 2
Evaluation Board Hardware ............................................................ 3
Power Supplies .............................................................................. 3
Link Options ................................................................................. 3
Test Circuits ...................................................................................4
Evaluation Board Software...............................................................6
Installing the Software ..................................................................6
Running the Software ...................................................................6
Software Operation .......................................................................7
Evaluation Board Schematics and Artwork...................................8
Ordering Information.................................................................... 14
Bill of Materials........................................................................... 14
REVISION HISTORY 1/11—Revision 0: Initial Version
Evaluation Board User Guide UG-243
Rev. 0 | Page 3 of 16
EVALUATION BOARD HARDWARE POWER SUPPLIES The EVAL-AD5172SDZ supports using single power supplies.
The evaluation board can be powered either from the SDP port or externally by the J1-1 and J1-2 connectors, as described in Table 1.
All supplies are decoupled to ground using 10 μF tantalum and 0.1 μF ceramic capacitors.
Table 1. Maximum and Minimum Voltages of the Connectors Connector No. Label Voltage J1-1 EXT Analog positive power supply, VDD. VDD For single-supply operation, it is 2.7 V
to 5 V. J1-2 GND Analog ground.
LINK OPTIONS Several link and switch options are incorporated in the evaluation board and should be set up before using the board. Table 2 describes the positions of the links to control the evaluation board by a PC, via the SDP board, using the EVAL-AD5172SDZ in single-supply mode. The functions of these link options are described in detail in Table 3 through Table 6.
Table 2. Link Options Setup for SDP Control (Default) Link No. Option A25 3.3 V A24 GND
Table 3. Link Functions Link No. Power Supply Options A25 VDD This link selects one of the following as the positive power supply: 5 V (from SDP). 3.3 V (from SDP). EXT (external supply from the J1-1 connector). A24 VSS This link should be connected to GND (analog ground).
UG-243 Evaluation Board User Guide
Rev. 0 | Page 4 of 16
TEST CIRCUITS The EVAL-AD5172SDZ incorporates several test circuits to evaluate the AD5172 performance.
DAC
RDAC1 can be operated as a digital-to-analog converter (DAC), as shown in Figure 2.
W1_BUF
A1
RDAC1
AC + DC
VDD
A1
B1BUF_W1
GND
DC
2VDD – VSS
VDD
2VDD – VSS
R34
R35
W1
W1
B109
610-
002
Figure 2. DAC
Table 4 shows the options available for the voltage references.
Table 4. DAC Voltage References Terminal Link Options Description A1 A20 AC + DC Connects Terminal A1 to
(VDD − VSS)/2 VDD Connects Terminal A1 to VDD W1 BUF_W1 Connects Terminal W1 to an
output buffer B1 A21 DC Connects Terminal B1 to
(VDD − VSS)/2 GND Connects Terminal B1 to
analog ground
The output voltage is defined in Equation 1.
256)( WB1
B1A1OUTR
VVV ×−= (1)
where: RWB1 is the resistor between the W1 and B1 terminals. VA1 is the voltage applied to the A1 terminal (A20 link). VB1 is the voltage applied to the B1 terminal (A21 link)
However, by using the R34 and R35 external resistors, the user can reduce the voltage of the voltage references. In this case, use the A1 and B1 test points to measure the voltage applied to the A0 and B0 terminals and recalculate VA0 and VB0 in Equation 1.
AC Signal Attenuation
RDAC1 can be used to attenuate an ac signal, which must be provided externally using the AC_INPUT connector, as shown in Figure 3.
W1_BUF
A1
RDAC1
AC + DC
AC_INPUT
AC
A1
B1BUF_W1
GND
2VDD – VSS
R34
R35
W1
W1
B1
1µF
R36
0961
0-00
3
DC
2VDD – VSS
Figure 3. AC Signal Attenuator.
Depending on the voltage supply rails and the dc offset voltage of the ac signal, various configurations can be used as described in Table 5.
Table 5. AC Signal Attenuation Link Options Link Options Conditions
A20 AC + DC No dc offset voltage. AC signal is outside the voltage supply rails
due to the dc offset voltage. DC offset voltage ≠ VDD/21. AC All other conditions. A21 DC Use in conjunction with ac + dc link. GND All other conditions. 1 Recommended to ensure optimal total harmonic distortion (THD) performance.
The signal attenuation is defined in Equation 2.
⎟⎟⎠
⎞⎜⎜⎝
⎛ +×=
−− ENDTOEND
WWB1
RRR
nAttenuatio log20)dB( (2)
where: RWB1 is the resistor between the W1 and B1 terminals. RW is the wiper resistance. REND-TO-END is the end-to-end resistance value.
In addition, R36 can be used to achieve a pseudologarithmic attenuation. To do so, adjust the R36 resistor until a desirable transfer function is found.
Evaluation Board User Guide UG-243
Rev. 0 | Page 5 of 16
Signal Amplifier
RDAC2 can be operated as an inverting or noninverting signal amplifier supporting linear or pseudo logarithmic gains. Table 6 shows the available configurations.
The noninverting amplifier with linear gain is shown in Figure 4, and the gain is defined in Equation 3.
R38R
G WB21 (3)
where RWB2 is the resistor between the W2 and B2 terminals.
VIN
RDAC2
B2 R42W2 B2
W2
VOUT
OAVOUTC110nF
R411.7kΩ
R382.7kΩ
0961
0-00
4
Figure 4. Linear Noninverting Amplifier
The noninverting amplifier with pseudologarithmic gain is shown in Figure 5, and the gain is defined in Equation 4.
AW2
WB2
RR
G 1 (4)
where: RWB2 is the resistor between the W2 and B2 terminals. RAW2 is the resistor between the A2 and W2 terminals.
VIN
RDAC2
B2A2 R42W2 B2
W2
VOUT
OAVOUT
A2
C110nF
R411.7kΩ
R43
0961
0-00
5
Figure 5. Pseudologarithmic Noninverting Amplifier
R43 and R42 can be used to set the maximum and minimum gain limits.
The inverting amplifier with linear gain is shown in Figure 6, and the gain is defined in Equation 5.
Note that the input signal, VIN, must be negative.
R38R
G WB2 (5)
where RWB2 is the resistor between the W2 and B2 terminals.
VIN
RDAC2
B2 R42W2 B2
W2
VOUT
OAVOUTC110nF
R411.7kΩ
R382.7kΩ
0961
0-00
6
Figure 6. Linear Inverting Amplifier
Table 6. Amplifier Selection Link Options Amplifier Gain Link Label VIN Range Noninverting Linear A27 LINEAR 0 V to VDD A29 NON-INV A30 NON-INV Pseudo logarithmic A27 PSEUDOLOG 0 V to VDD A29 NON-INV A30 NON-INV Inverting Linear A27 LINEAR −VDD to 0 V A29 INV A30 INV
UG-243 Evaluation Board User Guide
Rev. 0 | Page 6 of 16
EVALUATION BOARD SOFTWARE INSTALLING THE SOFTWARE The EVAL-AD5172SDZ evaluation kit includes evaluation board software provided on a CD. The software is compatible with Windows® XP, Windows Vista, and Windows 7 (both 32 bits and 64 bits).
Install the software before connecting the SDP board to the USB port of the PC to ensure that the SDP board is recognized when it is connected to the PC.
1. Start the Windows operating system and insert the CD. 2. The installation software opens automatically. If it does
not, run the setup.exe file from the CD. 3. After installation is completed, power up the evaluation
board as described in the Power Supplies section. 4. Connect the EVAL-AD5172SDZ into the SDP board and the
SDP board into the PC using the USB cable included in the evaluation kit.
5. When the software detects the evaluation board, follow the instructions that appear to finalize the installation.
RUNNING THE SOFTWARE To run the program, do the following:
1. Click Start > All Programs > Analog Devices > AD5172 > AD5172 Eval Board. To uninstall the program, click
Start > Control Panel > Add or Remove Programs > AD5172 Eval Board.
2. If the SDP board is not connected to the USB port when the software is launched, a connectivity error displays (see Figure 7). Simply connect the evaluation board to the USB port of the PC, wait a few seconds, click Rescan, and follow the instructions.
0961
0-01
0
Figure 7. Pop-Up Window Error
The main window of the EVAL-AD5172SDZ evaluation software then opens, as shown in Figure 8.
0961
0-02
2
Figure 8. EVAL-AD5172SDZ Evaluation Board Software Main Window
Evaluation Board User Guide UG-243
Rev. 0 | Page 7 of 16
SOFTWARE OPERATION The main window of the EVAL-AD5172SDZ software is divided into the following sections: RDAC1, RDAC2, and MANUAL WRITE.
RDAC1 and RDAC2 have the following options:
• WRITE can be used to update the RDAC registers by entering a desirable value into the text box and clicking WRITE. When WRITE is clicked, a write/read operation is performed, and the value displayed in this section is updated with the actual RDAC register value. This function can be used to verify whether the write operation was completed successfully.
• SHUTDOWN connects the wiper to the B terminal and open circuits the A terminal. When the button is clicked, the bit toggles automatically.
• RESET loads the value stored in the fuses. The button is disabled if the fuses are not programmed or if a fatal error occurred during the blowing.
• PROGRAM allows you to program the fuses. The A25 link must be connected to 5 V. If the board is operated at a
different supply, close the program, change the link, and rerun the software. The button is disabled if the fuses are programmed or if a fatal error occurred during the fuse blowing. Due to the supply voltage limitations of the SDP board, the fuses are blown at 5 V. This voltage is lower than the recommended voltage (5.6 V), and a proper blow is not guaranteed.
• FUSE STATUS shows the fuse status.
MANUAL WRITE has the following options:
• SEND DATA—A customized I2C data-word can be sent by manually switching the scroll bars from 0 to 1 or from 1 to 0 as desired and then clicking SEND DATA. The number of bytes to send can be selected by switching BYTES TO SEND to 1 or 2. In addition, the scroll bars are updated on each write transfer, showing the command sent to the part.
• EXIT closes the program but does not reset the part.
UG-243 Evaluation Board User Guide
Rev. 0 | Page 8 of 16
EVALUATION BOARD SCHEMATICS AND ARTWORK
09610-019
MU
LTIC
HANN
EL
I2C
SPI
U/D
0x5E0x
5E0x
58
0x5A
1AG
ND2
2B2
3A2
7A4
8W
4
9DG
ND
10SH
DN
11SY
NC
12DI
N
5AG
ND4
6B4
4W
2
21AG
ND1
19A3
13SD
O
14SC
LK
15RE
SET
16VD
D
17AG
ND3
18W
3
24B1
22W
1
23A1
20B3U6
AD84
03
1W
1
2B1
3A1
7B2
8A2
9SD
A
10VS
S
11A3
12B3
5W
P
6W
2
4AD
0
19W
4
13W
3
14SC
L
15DG
ND
16AD
1
17A4
18B4
20VD
DU7
AD52
54
1NC
2NC
3G
ND
7SH
DN
8DI
N
9SC
LK
10SD
O
11VS
S
12NC
5RE
SET
6VD
D
4SY
NC
21B2
19A2
13B3
14W
3
15A3
16B1
17W
1
18A1
24B4
22A4
23W
4
20W
2
U8AD
5204
4G
ND
5VD
D
6SC
L8
A2
7SD
A1
B1
2A1
3W
29
B2
10W
1
U1AD
5243
4GN
D
5VD
D
6SC
LK
8SY
NC7
DIN
1B1
2A1
3W
29
B2
10W
1
U2AD
5162
4G
ND
5VD
D
6SC
L8
A2
7SD
A1
B1
2A1
3W
29
B2
10W
1
U3AD
5172
_SO
CKET
1O
1
2SC
LK3
DIN
7A1
8W
1
9B1
10A2
11W
2
12B2
5G
ND6
VSS
4SD
O
19VD
D
13B3
14W
3
15A3
16B4
17W
4
18A4
20W
P
21RE
SET
22SY
NC
23RD
Y
24O
2
U4AD
5233
4VS
S
5W
2
6A2
8G
ND7
B2
1B1
2A1
3W
1
9M
ODE
10DA
CSEL
11U/
D12
CLK
13CS
14VD
DU5
AD52
22
4W
15
B1
6A1
8VS
S
7SD
A
1VD
D
2AD
0
3W
P
9SC
L
10DG
ND
11AD
112
A3
13B3
14W
3
U9AD
5252
4GN
D5
VSS
6A1
8B1
7W
1
1SC
LK2
DIN
3SD
O
9B2
10W
2
11A2
12VD
D
13W
P14
RESE
T
15SY
NC
16RD
Y
U10
AD52
32
4G
ND5
VSS
6A1
8B1
7W
1
1SC
LK2
DIN
3SD
O
9B2
10W
2
11A2
12VD
D
13W
P14
RESE
T
15SY
NC
16RD
Y
U11
AD52
35
4GN
D5
VSS
6V1
8B1
7W
1
1SC
LK2
DIN
3SD
O
9B2
10W
2
11V2
12VD
D
13W
P14
RESE
T
15SY
NC
16RD
Y
U12
ADN2
850
A1
W1-
1 B1 A2
W2-
1 B2 A3
W3-
1 B3 A4
W4-
1 B4
SHDN
RESE
T
SCLK
SDO
DIN
SYNC
-1
A1
W1-
8 B1 A2
W2-
8 B2 A3
W3-
8 B3 A4
W4-
8 B4
SDA
SCL
WP
A1
W1-
5 B1 A2
W2-
5 B2
RDY
SDO
DIN
SCLK
SYNC
-5
WP
RESE
T
VDD
VDD
VSS
VSS
VDD
A1
W1-
4 B1
W2-
4 B2
SYNC
-4DI
NSC
LK
VDD
A1
W1-
2 B1 A2
W2-
2 B2 A3
W3-
2 B3 A4
W4-
2 B4
SYNC
-2
SCLK
DIN
SDO
RESE
T
SHDN
VDD
VSS
A1
W1-
3 B1 A2
W2-
3 B2 A3
W3-
3 B3 A4
W4-
3 B4
O1
O2
RDY
SDO
SCLK
DIN
SYNC
-3
RESE
T
WP
VDD VS
S
W1-
6 B1
W2-
6 B2 V1 V2
RDY
SDO
DIN
SCLK
SYNC
-6
WP
RESE
T
VDD VS
S
A1
W1-
9 B1 A2
W2-
9 B2
A1
W1-
7 B1 A2
W2-
7 B2
RDY
SDO
DIN
SCLK
SYNC
-7
WP
RESE
T
VDD
VSS
VDD
SCL
SDA
WP
VSS
VDD
A1
W1-
10 B1 A2
W2-
10 B2
SDA
SCL
A1
W1-
11 B1 A2
W2-
11 B2
SDA
SCL
VDD
VDD
A1
W1-
12 B1 A2
W2-
12 B2
CS CLK
U/D
DACS
ELM
ODE
VDD
VSS
Figure 9. Schematic of Multiboard Digital Potentiometers
Evaluation Board User Guide UG-243
Rev. 0 | Page 9 of 16
VDD
DAC + FLOATING DAC + BW
PSEUDOLOG ATTENUATOR
B1
AC
AD8403-1
AD5204-1
AD5233-1
AD5162-1
AD5232-1
ADN2850-1
AD5235-1
AD5254-1
AD5252-1
AD5172
AD5243-1
W1
AD5222-1
+
-1
2
3U14-A
AD8618ARZ
BUF-W1 W1_BUF
R34
R35
R39
R40
AC_INPUT C3
A1
B1
R36
ABC
A20
ABC
A21
R3
R4
3 +2 -
1
U15-A
AD8652AR
5 +
6 - 7
U15-B
AD8652AR
8V+
4V-U15-C
W1-1
W1-2
W1-3
W1-4
W1-5
W1-6
W1-7
W1-8
W1-9
W1-10
W1-11
W1
W1-12
VDD
VSS
A1
B1
VSS
VDD
VSS
VDD
VSS
0961
0-02
0
AC + DC
Figure 10. Schematic of Multiboard RDAC0 Circuits
09
610-
021
INVERTING AND NON-INVERTING WITH LINEAR AND PSEUDO-LOG GAIN
DIGIPOT
PSEUDOLOG
LINEARNON-INVERTING
INVERTING
NON-INVERTING
INVERTING
CIRCUIT CONNECTION
VIN
GND
+
-
76
5U14-B
AD8618ARZ
AD8403 -2
AD5204 -2
AD5233 -2
AD5162 -2
AD5232 -2
ADN2850 -2
AD5235 -2
AD5254 -2
AD5252 -2
AD5172 -2
AD5243 -2
AD5322 -2
W2
VOUT
R38
J2-1
J2-2
R41
R42
R43
B2A2
OAV
OU
T
C1
BA A29
BAA27
BA A30
W2-1
W2-2
W2-3
W2-4
W2-5
W2-6
W2-7
W2-8
W2-9
W2-10
W2-11
W2-12
W2
A2
B2W2
Figure 11. Schematic of Multiboard RDAC1 Circuits
UG-243 Evaluation Board User Guide
Rev. 0 | Page 10 of 16
09610-017
POW
ER-S
UPP
LIES
EXT
VD
D +5V
+3.3
V
GN
D
EXT
VSS
GN
D
CH
ANN
ELS
3 AN
D 4
POW
ER-S
UPP
L Y
DIG
ITAL
PIN
SC
UR
REN
T M
ON
ITO
R+C
2410
uFC
250.
1uF C26
0.1u
F+
C27
10uF
J1-1
J1-2
J1-3
A B C
A25
A BA24
+ -14
1312U
14-D AD
8618
ARZ
AD84
03-4
AD52
04-4
AD52
33-4
AD52
54-4
+ -8
910U
14-C AD
8618
ARZ
AD84
03-3
AD52
04-3
AD52
33-3
AD52
54-3
BUF-
4
BUF-
3
A4
VOU
T4
B4 A3
VOU
T3
B3
W4
W3
O2
O1
V2V1
C2
0.1u
F C4
0.1u
F
VSS
VDD
+3.3
V+5
V
W4-
1
W4-
2
W4-
3
W4-
8
W3-
1
W3-
2
W3-
3
W3-
8
B4 A3
B3A4
O1
O2
V1
V2
Figure 12. Schematic of AD5172 Power Supplies and Other Channels
Evaluation Board User Guide UG-243
Rev. 0 | Page 11 of 16
09610-018
MU
X-C
S
LEVE
LTR
ANSL
ATO
R
TEST
POIN
TS
SDP
BOAR
DC
ONN
ECTO
RAN
DEE
PRO
M
EXTE
RN
ALC
ON
TRO
LC
ONN
ECTI
ON
SPO
RT
UART
SPI
TIM
ERS
INPU
T/O
UTP
UT
GEN
ERAL
CONT
ROL
BLAC
KFIN
PORT
PARA
LLEL
FUTU
REUS
E
I2C
POW
ERSU
PPLY
1VI
N_4-
12V
2N/
C3
GND
4GN
D5
5V_U
SB6
GND
7PA
R_D2
38
PAR_
D21
9PA
R_D1
910
PAR_
D17
11GN
D
12PA
R_D1
413
PAR_
D13
14PA
R_D1
115
PAR_
D916
PAR_
D7
17GN
D
18PA
R_D5
19PA
R_D3
20PA
R_D1
21PA
R_RD
22PA
R_CS
23GN
D
24PA
R_A3
25PA
R_A1
26PA
R_FS
327
PAR_
FS1
28GN
D
29SP
ORT
_DR3
30SP
ORT
_DR2
31SP
ORT
_DR1
32SP
ORT
_DT1
33SP
ORT
_DT2
34SP
ORT
_DT3
35SP
ORT
_INT
36GN
D
37SP
I_SE
L_B
38SP
I_SE
L_C
39SP
I_SE
L1/_
SS
40GN
D
41SD
A_1
42SC
L_1
43GP
IO0
44GP
IO2
45GP
IO4
46GN
D
47GP
IO6
48TM
R_A
49TM
R_C
50FU
TURE
51FU
TURE
52GN
D
53FU
TURE
54FU
TURE
55FU
TURE
56FU
TURE
57FU
TURE
58GN
D
59UA
RT_R
X
60RE
SET_
IN61
BMO
DE1
62UA
RT_T
X
63GN
D
64FU
TURE
65FU
TURE
66FU
TURE
67FU
TURE
68FU
TURE
69GN
D
70FU
TURE
71FU
TURE
72TM
R_D
73TM
R_B
74GP
IO7
75GN
D
76GP
IO5
77GP
IO3
78GP
IO1
79SC
L_0-
EEPR
OM
80SD
A_0-
EEPR
OM
81GN
D
82SP
I_CL
K83
SPI_
MIS
O84
SPI_
MO
SI85
SPI_
SEL_
A
86GN
D
87SP
ORT
_TSC
LK88
SPO
RT_D
TO
89SP
ORT
_TFS
90SP
ORT
_RFS
91SP
ORT
_DR0
92SP
ORT
_RSC
LK
93GN
D
94PA
R_CL
K95
PAR_
FS2
96PA
R_A0
97PA
R_A2
98GN
D
99PA
R_IN
T10
0PA
R_W
R
101
PAR_
D010
2PA
R_D2
103
PAR_
D4
104
GND
105
PAR_
D610
6PA
R_D8
107
PAR_
D10
108
PAR_
D12
109
GND
110
PAR_
D15
111
PAR_
D16
112
PAR_
D18
113
PAR_
D20
114
PAR_
D22
115
GND
116
V_IO
(3.3
V)11
7GN
D11
8GN
D11
97V
_UNR
EGO
UT12
07V
_UNR
EGO
UT
J22
BLAC
KFIN
-DB_
FEM
ALE_
CON
NEC
TOR_
2
1A0
2A1
3A2
4VS
S5
SDA
6SC
L7
WP
8VC
CU25
24LC
01
D6 LED
R37
1K
DGND
AGND
4S8
5S6
11A0
10A1
6EN
9A2
1S5
14S2
2S7
12S4
13S1
3D
7VS
S
8G
ND
15S3
16VD
D
A22
ADG
658
35A0
36A1
37A2
38A3
39A4
40A5
1A6
2A7
3A8
4A9
5A1
06
A11
7A1
28
A13
9A1
410
A15
30B0
29B1
28B2
27B3
26B4
25B5
24B6
23B7
22B8
21B9
20B1
019
B11
18B1
217
B13
16B1
415
B15
32BE
231
BE1
34SE
L
11GN
D33
VCC
U13
ADG
3247
-CSP
MUX
-A0|
CS
MUX
-A2|
U/D
SCLK
_BF
DIN_
BFM
UX-A
1|DA
CSEL
RDY|
MO
DE
CLK
SDO
_BF
SYNC
_BF
SDA_
BF
SHDN
_BF
SCL_
BF
RESE
T_BF
WP_
BF
+3V3
VDD
+5V VS
S
A23
A5 A6 A7 A8
A9 A10
A11
A12
A13
A14
A16
A17
A18
R2 2k2
R1 2k2
DIN_
BFSD
O_B
FSC
LK_B
F
SYNC
_BF
RDY|
MO
DERE
SET_
BFW
P_BF
SDA_
BF
SCL_
BF SHDN
_BF
+3.3
V+5
V
+3.3
V
MUX
-A2|
U/D
MUX
-A1|
DACS
ELM
UX-A
0|CS
MUX
-A0|
CSM
UX-A
1|DA
CSEL
MUX
-A2|
U/D
SYNC
-1
SYNC
-2
SYNC
-3
SYNC
-4
SYNC
-5
SYNC
-6
SYNC
-7
VDD
+3.3
V
CLK_
BF
SCLK
_BF
SCLK
DIN_
BFDI
NSD
O_B
FSD
OSY
NC_B
FSY
NCSY
NCRE
SET_
BFW
P_BF
SHDN
_BF
RDY_
BF
RESE
TW
PSH
DNRD
YSD
A_BF
SCL_
BFSD
ASC
LM
UX-A
0|CS
MUX
-A1|
DACS
ELM
UX-A
2|U/
DRD
Y|M
ODE
CS DACS
ELU/
DM
ODE
CLK_
BFCL
K
+5V
MUX
-A0|
CS
MUX
-A1|
DACS
EL
MUX
-A2|
U/D
RDY|
MO
DE
CLK_
BF
SCLK
_BF
DIN_
BF
SDO
_BF
SYNC
_BF
SDA_
BF
SCL_
BF
SHDN
_BF
RESE
T_BF
WP_
BF
VDD
VSS
+5V
+3.3
V
+3.3
V
Figure 13. Schematic of SDP Connector
UG-243 Evaluation Board User Guide
Rev. 0 | Page 12 of 16
0961
0-01
4
Figure 14. Component Side View
0961
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Figure 15. Component Placement Drawing
0961
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Figure 16. Layer 2 Side PCB Drawing
Evaluation Board User Guide UG-243
Rev. 0 | Page 13 of 16
0961
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Figure 17. Layer 3 Side PCB Drawing
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Figure 18. Solder Side PCB Drawing
UG-243 Evaluation Board User Guide
Rev. 0 | Page 14 of 16
ORDERING INFORMATION BILL OF MATERIALS
Table 7. Qty Reference Designator Description Supplier1/Part Number 1 C1 10 nF capacitor, 0805 FEC 1692285 4 C2, C4, C25, C26 0.1 μF capacitor, 0603 FEC 138-2224 1 C3 1 μF capacitor, 0402 FEC 1288253 2 C24, C27 10 μF capacitor, 1206 FEC 1611967 1 D6 LED, green FEC 579-0852 1 J1 3-pin connector FEC 151790 1 J2 2-pin connector FEC 151789 1 J22 Receptacle, 0.6 mm, 120-way Digi-Key H1219-ND 4 A20, A21, A24, A25 Header 2-row, 36 + 36 way and jumper socket,
black FEC 148-535 and FEC 150-410
3 A27, A29, A30 Header 1-row, 3-way and jumper socket, black FEC 102-2248 and FEC 150-410
4 BUF-W1, OAVOUT, BUF-3, BUF-4 Header 1-row, 2-way and jumper socket, black FEC 102-2247 and FEC 150-410
1 R41 1.78 kΩ resistor, 0603, 1% FEC 1170811 2 R1, R2 2.2 kΩ resistor, 0603, 1% FEC 933-0810 5 R3, R4, R38, R39, R40 2.7 kΩ resistor, 1206, 1% FEC 9337288 36 AD5162-1, AD5162-2, AD5172-1, AD5172-2,
AD5204-1, AD5204-2, AD5204-3, AD5204-4, AD5222-1, AD5222-2, AD5232-1, AD5232-2, AD5233-1, AD5233-2, AD5233-3, AD5233-4, AD5235-1, AD5235-2, AD5243-1, AD5243-2, AD5252-1, AD5252-2, AD5172-1, AD5172-2, AD5172-3, AD5172-4, AD8403-1, AD8403-2, AD8403-3, AD8403-4, ADN2850-1, ADN2850-2, R34, R35, R42, R43
0 Ω resistor, 0603 FEC 9331662
1 R37 1 kΩ resistor, 0603, 1% FEC 933-0380 6 3.3 V, 5 V, DGND, AGND, VDD, VSS Test point, PCB, black, PK100 FEC 873-1128 34 A1, A2, A3, A4, RDY|MODE, RESET_BF, SCL_BF,
SCLK_BF, SDA_BF, SDO_BF, SHDN_BF, SYNC_BF, MUX-A0|CS, MUX-A1|DACSEL MUX-A2|U/D, O1, O2, DIN_BF, CLK, B1, B2, B3, B4, V1, V2, VOUT, VOUT2, VOUT3, VOUT4, W1, W1_BUF, W2, W3, W4, WP_BUF
Test point, PCB, red, PK100 FEC 873-1144
1 U1 256-position dual channel I2C compatible digital potentiometer
Analog Devices AD5243
1 U2 256-position dual channel SPI digital potentiometer
Analog Devices AD5162
1 U3 256-position, one-time programmable, dual channel, I2C digital potentiometer
Analog Devices AD5172
1 U4 Nonvolatile, quad, 64-position digital potentiometer
Analog Devices AD5233
1 U5 Dual, increment/decrement digital potentiometer Analog Devices AD5222 1 U6 4-channel digital potentiometer Analog Devices AD8403 1 U7 Quad 256-position I2C nonvolatile memory, digital
potentiometer Analog Devices AD5254
1 U8 4-channel digital potentiometer Analog Devices AD5204 1 U9 I2C, nonvolatile memory, dual 256-position digital
potentiometer Analog Devices AD5252
1 U10 Nonvolatile memory, dual, 256-position digital potentiometer
Analog Devices AD5232
1 U11 Dual 1024-position digital potentiometer with nonvolatile memory and SPI interface
Analog Devices AD5235
Evaluation Board User Guide UG-243
Rev. 0 | Page 15 of 16
Qty Reference Designator Description Supplier1/Part Number 1 U12 Dual 1024-position digital rheostat with
nonvolatile memory and SPI interface Analog Devices ADN2850
1 U13 2.5 V/3.3 V, 16-bit (dual 8-bit) , 2-port level translator, bus switch
Analog Devices ADG3247
1 A22 3 V/5 V ± 5 V CMOS 8-channel analog multiplexer Analog Devices ADG658 1 U15 50 MHz, precision, low distortion, low noise CMOS
amplifier Analog Devices AD8652
1 U14 Precision 20 MHz CMOS quad rail-to-rail operational amplifier
Analog Devices AD8618
1 U25 24LC64 EEPROM FEC 975-8070 1 FEC refers to Farnell Electronic Component Distributors; Digi-Key refers to Digi-Key Corporation.
RELATED LINKS Resource Description AD5243 Product Page, 256-Position Dual-Channel I2C Compatible Digital Potentiometer AD5162 Product Page, 256-Position Dual-Channel SPI Digital Potentiometer AD5172 Product Page, 256-Position, One-Time Programmable, Dual Channel, I2C Digital Potentiometer AD5233 Product Page, Nonvolatile, Quad, 64-Position Digital Potentiometer AD5222 Product Page, Dual, Increment/Decrement Digital Potentiometer AD8403 Product Page, 4-Channel Digital Potentiometer AD5254 Product Page, Quad 256-Position I2C Nonvolatile Memory, Digital Potentiometer AD5204 Product Page, 4-Channel Digital Potentiometer AD5252 Product Page, I2C, Nonvolatile Memory, Dual 256-Position Digital Potentiometer AD5232 Product Page, Nonvolatile Memory, Dual, 256-Position Digital Potentiometer AD5235 Product Page, Dual 1024-Position Digital Potentiometer with Nonvolatile Memory and SPI Interface ADN2850 Product Page, Dual 1024-Position Digital Rheostat with Nonvolatile Memory and SPI Interface ADG3247 Product Page, 2.5 V/3.3 V, 16-Bit (Dual 8-Bit) , 2-Port Level Translator, Bus Switch ADG658 Product Page, 3 V/5 V ± 5 V CMOS 8-Channel Analog Multiplexer AD8652 Product Page, 50 MHz, Precision, Low Distortion, Low Noise CMOS Amplifier AD8618 Product Page, Precision 20 MHz CMOS Quad Rail-To-Rail Operational Amplifier
UG-243 Evaluation Board User Guide
Rev. 0 | Page 16 of 16
NOTES
I2C refers to a communications protocol originally developed by Philips Semiconductors (now NXP Semiconductors).
ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
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