1
dc1805af
DEMO MANUAL DC1805A
Description
LTC6362
Driving 18-Bit SAR ADC
The LTC
®
6362 is a low power, low noise differential op
amp with rail-to-rail input and output swing that has been
optimized to drive low power SAR ADCs. The amplifier
may be configured to buffer a fully differential input signal
or convert a single-ended input signal to a differential
output signal.
The LTC2380/LTC2379/LTC2378/LTC2377/LTC2376 are low
power, low noise ADCs with serial outputs that can operate
from a single 2.5V supply. The DC1805A demonstrates
the DC and AC performance of the LTC6362 driving the
LTC2379-18 when used in conjunction with the DC590B
QuikEval™ and DC718 fast DACs data collection boards.
Use the DC590B to demonstrate DC performance such
as peak-to-peak noise and DC linearity. Use the DC718
if precise sampling rates are required or to demonstrate
AC performance such as SNR, THD, SINAD and SFDR.
The DC1805A is intended to demonstrate recommended
grounding, component placement and selection, routing
and bypassing for LTC6362 and the ADC.
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
QuikEval and PScope are trademarks of Linear Technology Corporation. All other trademarks are
the property of their respective owners.
Figure 1. DC1805A Connection Diagram
2
dc1805af
DEMO MANUAL DC1805A
Description
Figure 2. DC1805A Test Diagram
Table 1. DC1805A Assembly Options
ASSEMBLY VERSION PART NUMBER MAX CONVERSION RATE NUMBER OF BITS MAX CLK IN FREQUENCY
DC1805A-A LTC2380CMS-16 2Msps 16 100MHz
DC1805A-B LTC2378CMS-16 1Msps 16 50MHz
DC1805A-C LTC2377CMS-16 500ksps 16 25MHz
DC1805A-D LTC2376CMS-16 250ksps 16 12.5MHz
DC1805A-E LTC2379CMS-18 1.6Msps 18 99.2MHz
DC1805A-F LTC2378CMS-18 1Msps 18 62MHz
DC1805A-G LTC2377CMS-18 500ksps 18 31MHz
DC1805A-H LTC2376CMS-18 250ksps 18 15.5MHz
Quick start proceDure
3
dc1805af
DEMO MANUAL DC1805A
Dc718 Quick start proceDure
Check to make sure that all switches and jumpers are
set as shown in the connection diagram of Figure 1. The
default connections configure the ADC to use the onboard
reference and regulators to generate the required common
mode voltages. The analog input is DC coupled. Connect
the DC1805A to a DC718 USB high speed data collection
board using connector J4. Then, connect the DC718 to a
host PC with a standard USB A/B cable. Apply 9V to the
indicated terminals. Then apply a low jitter signal source
to J3. Connect a low jitter 100MHz 3.3VP-P sine wave or
square wave to connector J1. Note that J1 has a 50Ω
termination resistor to ground.
Run the QuikEval-II software (Pscope.exe version K72
or later) supplied with the DC718 or download it from
www.linear.com.
Complete software documentation is available from the
Help menu. Updates can be downloaded from the Tools
menu. Check for updates periodically as new features
may be added.
The PScope™ software should recognize the DC1805A
and configure itself automatically.
Click the Collect button (see Figure 4) to begin acquiring
data. The Collect button then changes to Pause, which
can be clicked to stop data acquisition.
Dc590B setup
IMPORTANT! To avoid damage to the DC1805A, make
sure that VCCIO (JP5) is set to 3.3V before connecting
the DC590B to the DC1805A.
Connect the DC590B to a host PC with a standard USB
A/B cable. Connect the DC1805A to a DC590B USB serial
controller using the supplied 14-conductor ribbon cable.
Run the evaluation software supplied with the DC590B or
download it from www.linear.com.
The correct control panel will be loaded automatically. Click
the Collect button to begin reading the ADC.
This board is tested by measuring the distortion at the
differential output given a –1dBFS, 2kHz single-ended
input as shown in Figure 2.
For SINAD, THD or SNR testing a low noise, low distor-
tion generator such as Audio Precision SYS-2722, B&K
Type 1051 or Stanford Research DS360 should be used.
A low jitter RF oscillator such as the Marconi Instruments,
Multisource Generator 2026 should be used as the clock
source.
To test the boards please follow the steps below:
1) Make sure that all the jumpers are set as shown in
Figure 2 (DC1805A Test Diagram).
2) Power up the board by applying 9VDC.
3) Apply the clock signal to connector J1. Clock frequency
99.2MHz (to achieve 1.6Msps conversion rate, please
refer to the Clock Source section for more detailed
information), VIN 3.3VP-P.
4) A single pole lowpass filter should be used for best
SNR measurement data. One option is to create an on-
board RC low pass filter by populating R5 with 200Ω
and C33 with 0.22µF. It is very important to use a very
low distortion capacitor. In order to balance both inputs
of the LTC6362 populate R12 with a 200Ω resistor in
parallel with a 0.22µF capacitor.
5) Apply a 2kHz, –1dBFS signal to connector J3.
The performance that results from these connections are
displayed in Figure 4.
Quick start proceDure
4
dc1805af
DEMO MANUAL DC1805A
Dc1805a setup
DC Power
The DC1805A requires 9VDC and draws less than 70mA.
Most of the supply current is consumed by the CPLD,
regulators and discrete logic on the board. The 9VDC input
voltage powers the LTC6362 and the ADC through LT
®
1763
regulators which provide protection against accidental
reverse bias. Additional regulators provide power for the
CPLD. See Figure 1 for connection details.
Clock Source
You must provide a low jitter 3.3VP-P maximum sine or
square wave to J1. The clock input is AC-coupled so the
DC level of the clock signal is not important. A genera-
tor like the Marconi Instruments, Multisource Generator
2026, HP8644 or the DC1216A-A is recommended. Even
a good generator can start to produce noticeable jitter at
low frequencies. Therefore it is recommended for lower
sample rates to divide down a higher frequency clock
to the desired sample rate. The ratio of clock frequency
to conversion rate is 62:1 for 18-bit parts and 50:1 for
16-bit parts. If the clock input is to be driven with logic,
it is recommended that the 50Ω terminator (R1) be re-
moved. Slow rising edges may compromise the SNR of
the converter in the presence of high amplitude higher
frequency input signals.
Reference
The default reference is a LTC6655 5V reference. An external
reference can be used by removing (U3) and populating
(R6) with 0 resistor. If an external reference is used it must
settle quickly in the presence of glitches on the REF pin.
Analog Input
LTC6362 drives the analog input of the LTC2379-18 on
the DC1805A as shown in Figure 3. This circuit converts
a single-ended input signal to a differential output signal
applied at the ADC inputs. Please refer to the LTC6362 data
sheet for various configurations of the LTC6362 interface
to the SAR ADC.
AC-coupling the input may degrade the distortion per-
formance of the ADC due to nonlinearity of the coupling
capacitor.
Component Selection
When driving a low noise, low distortion ADC such as
the LTC2379-18 with the LTC6362, component selection
is important so as to not degrade performance. Resistors
should have low values to minimize noise and distortion.
Metal film resistors are recommended to reduce distortion
caused by self heating. To further reduce distortion, NPO
or silver mica capacitors should be used because of their
low voltage coefficients.
DC1805A F03
+
R17
1k
R18
35.7Ω
C26
NPO
3900pF
R28
35.7Ω
R19
0Ω
0402
R19
0Ω
0402
R27
1k
R15
1k
R26
1k LTC6362 LTC2379-18
+
C27
NPO
3900pF
C29
NPO
3900pF
AIN+
Figure 3. LTC6362 Ground Referenced Single-Ended to Differential Converter
5
dc1805af
DEMO MANUAL DC1805A
Dc1805a setup
Figure 4. PScope Screenshot
Jumpers
JP1 – Sets the DC bias for VOCM of the LTC6362 to be
internally biased or externally driven. The voltage on this
pin sets the output common mode voltage level. VREF /2
is the default setting.
JP2 – Toggles the LTC6362 On and Off. Part On (5V) is
the default setting.
JP3 – In the REF position the Digital Gain Compression
is off and the analog input range at ADC inputs is 0V to
VREF. In the GND position Digital Gain Compression is
turned on and the analog input range at ADC inputs is
0.1VREF to 0.9VREF.
JP4 – Ties the WP pin to VCC or GND. WP is the hardware
write-protect pin. If tied to VCC, hardware write protection
is enabled. If WP is tied to GND, the hardware write-
protection is disabled.
JP5 – VCCIO sets the output levels at J3 to either 3.3V
or 2.5V. Use 3.3V to interface to the DC718 which is the
default setting.
6
dc1805af
DEMO MANUAL DC1805A
parts List
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
1 14 C1, C2, C3, C4, C6, C7, C8, C10, C15,
C16, C18, C20, C21, C28
Capacitor, X7R, 0.1µF, 25V, 10%, 0603 AVX, 06033C104KAT2A
2 5 C22, C35, C38, C41, C44 Capacitor, X7R, 1µF, 16V, 10%, 0603 AVX, 0603YC105KAT2A
3 1 C9 Capacitor, X5R, 47µF 6.3V, 20%, 0805 Taiyo Yuden, JMK212BJ476MG-T
4 7 C5, C11, C17, C37, C40, C43, C46 Capacitor, X5R, 10µF 6.3V, 20%, 0603 TDK, C1608X5R0J106MT
5 1 C12 Capacitor, X7R, 4.7µF 10V, 10%, 0805 AVX, 0805ZC475KAT2A
6 1 C19 Capacitor, X7R, 0.1µF, 25V, 5%, 0805 AVX, 08053C104JAT2A 
7 1 C24 Capacitor, X7R, 0.01µF, 16V,10%, 0402 AVX, 0402YC103KAT2A
8 0 C13, C14, C23, C25, C30, C31, C32, C33 Capacitor, 0603 OPT
9 3 C26, C27, C29 Capacitor, Ceramic 3900pF, 100V NPO,1206 AVX, 12061A392JAT2A
10 1 C34 Capacitor, X5R, 22µF 16V, 20%, 1210 Taiyo Yuden, EMK325BJ226MM-T
11 4 C36, C39, C42, C45 Capacitor, X7R, 0.01µF, 16V,10%,0603 AVX, 0603YC103KAT
12 8 C47, C48, C49, C50, C51, C52, C53, C54 Capacitor, X7R, 0.1µF, 16V,10%, 0402 TDK, C1005X7R1C104KT
13 5 E1, E2, E3, E4, E5, E6, E7, E8, E9 TP, Turret, 0.094" Mill-Max, 2501-2-00-80-00-00-07-0
14 3 J1, J2, J3 Connector, BNC-5PINS Connex, 112404
15 1 J4 Connector, 40 Pins SMT, CON-EDGE40-100 Samtec, TSW-120-07-L-D
16 1 J5 Header, 2×7, 0.079" Molex, 87831-1420
17 1 J6 Header, 2×5, 0.100", HD2X5-100 Samtec, TSW-105-07-L-D
18 5 JP1-JP5 Jumper, 1×3, 0.100", HD1X3-100 Samtec, TSW-103-07-L-S
19 1 R1 Resistor, Chip 49.9, 1%, 1206 NIC, NRC12F49R9TRF
20 11 R2, R3, R13, R14, R15, R17, R20, R21,
R26, R27, R30
Resistor, Chip 1k, 1%, 0603 NIC, NRC06F1001TRF
21 5 R4, R7, R8, R9, R44 Resistor, Chip 33, 1%, 0603 NIC, NRC06F33R0TRF
22 4 R5, R10, R12, R23 Resistor, Chip 0, 1%, 0603 NIC, NRC06F0000TRF
23 0 R6, R11, R16, R24, R25 Resistor, 0603 OPT
24 2 R18, R28 Resistor, Chip 35.7, 1%, 0603 Vishay, CRCW060335R7FKEA
25 2 R19, R29 Resistor, Chip 0, 1/16W, 1%, 0402 NIC, C04F0000TRF
26 1 R22 Resistor, Chip 2k, 1%, 0603 NIC, NRC06F2001TRF
27 3 R31, R32, R33 Resistor, Chip 4.99k, 1%, 0603 NIC, NRC06F4991TRF
28 1 R34 Resistor, Chip 10k, 1%, 0402 NIC, NRC04F1002TRF
29 4 R36, R37, R38, R40 Resistor, Chip 1k, 1%, 0402 NIC, NRC04F1001TRF
30 1 R39 Resistor, Chip 10k, 1%, 0603 NIC, NRC06F1002TRF
31 1 R41 Resistor, Chip 2.80k, 1%, 0603 NIC, NRC06F2801TRF
32 1 R42 Resistor, Chip 1.69k, 1%, 0603 NIC, NRC06F1691TRF
33 1 R43 Resistor, Chip 1.54k, 1%, 0603 NIC, NRC06F1541TRF
34 2 U1, U6 IC., Tinylogic UHS Inverter, SC70-5 Fairchild, NC7SZ04P5X
35 2 U2, U5 IC., Tinylogic ULP-A Unbuffered Inverter, SC70-5 Fairchild, NC7SVU04P5X
36 1 U3 IC., LTC6655CHMS8-5, MS8 Linear Technology, LTC6655CHMS8-5#PBF
37 1 U4 IC., Single D Flip Flop, US8 ON Semiconductor, NL17SZ74 (USG)
38 1 U7 IC., Single SPST Bus Switch, SC70-5 Fairchild, NC7SZ66P5X
39 1 U9 IC., LTC6362CMS8, MS8 Linear Technology, LTC6362CMS8
40 1 U10 IC., Serial EEPROM, TSSOP Microchip, 24LC024-I/ST
7
dc1805af
DEMO MANUAL DC1805A
parts List
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
41 1 U11 IC., LT1763CS8-1.8, SO8 Linear Technology, LT1763CS8-1.8#PBF
42 1 U12 IC., LT1763CS8, SO8 Linear Technology, LT1763CS8#PBF
43 1 U13 IC., MAX II Family, TQFP100 Altera, EPM240GT100C5N
44 1 U14 IC., LT1763CS8-2.5, SO8 Linear Technology, LT1763CS8-2.5#PBF
45 1 U15 IC., LT1763CS8-5, SO8 Linear Technology, LT1763CS8-5#PBF
46 4 MH1-MH4 Stand-Off, Nylon (Snap On), 0.375" Tall Keystone, 8832 (Snap On)
47 5 Shunts as Shown on Assembly Drawing
(JP1-JP5)
Shunt, .100" Center Samtec, SNT-100-BK-G
48 2 Stencil for Top and Bottom Stencil #DC1805A-2
DC1805A-A
1 1 DC1805A-A General BOM
2 1 U8 IC., LTC2380CMS-16, MS16 Linear Technology, LTC2380CMS-16
3 0 R35 (OPT) Resistor, Chip 300Ω, 1%, 0402 OPT
DC1805A-B
1 1 DC1805A-B General BOM
2 1 U8 IC., LTC2378CMS-16, MS16 Linear Technology, LTC2378CMS-16
3 0 R35 (OPT) Resistor, Chip 300Ω, 1%, 0402 OPT
DC1805A-C
1 1 DC1805A-C General BOM
2 1 U8 IC., LTC2377CMS-16, MS16 Linear Technology, LTC2377CMS-16
3 0 R35 (OPT) Resistor, Chip 300Ω, 1%, 0402 OPT
DC1805A-D
1 1 DC1805A-D General BOM
2 1 U8 IC., LTC2376CMS-16, MS16 Linear Technology, LTC2376CMS-16
3 0 R35 (OPT) Resistor, Chip 300Ω, 1%, 0402 OPT
DC1805A-E
1 1 DC1805A-E General BOM
2 1 U8 IC., LTC2379CMS-18, MS16 Linear Technology, LTC2379CMS-18
3 1 R35 Resistor, Chip 300Ω, 1%, 0402 NIC, NRC04F3000TRF
DC1805A-F
1 1 DC1805A-F General BOM
2 1 U8 IC., LTC2378CMS-18, MS16 Linear Technology, LTC2378CMS-18
3 1 R35 Resistor, Chip 300Ω, 1%, 0402 NIC, NRC04F3000TRF
DC1805A-G
1 1 DC1805A-G General BOM
2 1 U8 IC., LTC2377CMS-18, MS16 Linear Technology, LTC2377CMS-18
3 1 R35 Resistor, Chip 300Ω, 1%, 0402 NIC, NRC04F3000TRF
DC1805A-H
1 1 DC1805A-H General BOM
2 1 U8 IC., LTC2376CMS-18, MS16 Linear Technology, LTC2376CMS-18
3 1 R35 Resistor, Chip 300Ω, 1%, 0402 NIC, NRC04F3000TRF
8
dc1805af
DEMO MANUAL DC1805A
schematic Diagram
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
100MHz Max
CLK
3.3Vpp
AIN-
EXT VCM
AIN+
0805
EXT REF
TO CPLD
FROM CPLD
0402
WP
PROG
0402
BUSY
RD
SDO
SCK
CNV
DB17
DB16
REF
DC590
EXT VOCM
0402
0805
0805
SHDN
PWR ON
REF
GND
2.0
18
LTC2380CMS-16
0.25
-E
*
LTC2376CMS-16
16
18
U8
-H
0.25
-A
16
LTC2376CMS-18
BITS
0.5
-D
LTC2377CMS-18
0.5
MSPS
-G
ASSY
16
LTC2377CMS-16
18
1.0
-C
1.6
LTC2378CMS-18 18
1.0
-F
LTC2378CMS-16 16-B
6.3V
1206
1206
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
NOTE: UNLESS OTHERWISE SPECIFIED
2. INSTALL SHUNTS AS SHOWN.
1206
*
LTC2379CMS-18
2
DC1805A
12
LTC6362 DRIVING 18 - BIT SAR ADC
N/A
LTC6362CMS8
NC
ERJON Q.
10-14-11
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCU IT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
ERJON Q.PRODUCTION FAB- 2 10-14-11
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB8
DB13
DB12
DB11
DB9
DB10
DB14
DB15
CLKOUT
CNVST_33
DB16
DB17
CLK
DC590_DETECT
SCK
SDO
BUSY
RD
SDO
SCK
CNV
CNV
+3.3V +3.3V
+5V
+3.3V
+2.5V
+3.3V
+3.3V
+3.3V
9V-10V
+3.3V+3.3V
9V-10V
+5V
R33
4.99k
R5
0
R16
OPT
C29
3900pF
NPO
R3
1k
C33
OPT
E9
J3
BNC
R10
0
R17
1k
C18
0.1uF
U1
NC7SZ04P5X
4
53
2
R26
1K
JP3
C13
OPT
C28
0.1uF
JP1
R25
OPT
R13
1K
R2
1k
C2
0.1uF
C7
0.1uF
E2
J1
BNC
C21
0.1uF
U4
NL17SZ74
1
2
3
4
5
67
8
CP
D
Q
GND
Q
CLR PR
VCC
R14
1K
C3
0.1uF
R20
1k
R9
33
R1
49.9
1206
J4
3201S-40G1
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
33 34
35 36
37 38
39 40
12
34
56
78
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38
39 40
U2
NC7SVU04P5X
4
53
2
JP2
C12
4.7uF
C27
3900pF
NPO
C23
OPT
6.3V
R30
1k
U3
LTC6655CHMS8-5
1
2
3
4 5
6
7
8
SHDN
VIN
GND
GND GND
VOUT_S
VOUT_F
GND
R6
OPT
R18
35.7
R29
0
R22
2k
R23
0
U10
24LC024-I/ST
1
2
3
4
5
6
7
8
A0
A1
A2
VSS
SDA
SCL
WP
VCC
U9
LTC6362CMS8
1
6
2
3
4 5
7
8
IN-
V-
VOCM
V+
OUT+ OUT-
SHDN
IN+
R21
1k
R11
OPT
R32
4.99k
R15
1K
C20
0.1uF
JP4
C25
OPT
C31
OPT
C26
3900pF
NP0
C4
0.1uF
J2
BNC
R4
33
J5
HD2X7-079-MOLEX
1 2
3 4
5 6
7 8
9 10
11 12
13 14
R8
33
C30
OPT
U7
NC7SZ66P5X
12
4
53
AB
OE
VCCGND
R7
33
C14
OPT
C5
10uf
R19
0
C15
0.1uF
E1
R31
4.99k
R27
1k
U6
NC7SZ04P5X
4
53
2
C11
10uF
6.3V
C32
OPT
C6
0.1uF
R24
OPT
C1
0.1uF
U5
NC7SVU04P5X
4
53
2
C24
0.01uF
C22
1uF
C10
0.1uF
C19
0.1uF
R28
35.7
C9
47uF
6.3V
U8
LTC23XXCMS
2
15
7
8
9
13
14
11
12
1
3
6
10
16
4
5
VDD
OVDD
REF
REF/SEL
CNV
SCK
SDO
BUSY
ROL/SDI
CHAIN
GND
GND
GND
GND
IN+
IN-
R12
0
C16
0.1uF
C8
0.1uF
C17
10uF
6.3V
9
dc1805af
DEMO MANUAL DC1805A
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
schematic Diagram
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
+3.3V
+1.8V
9V-10V
9V-10V
9V-10V
+3.3V
+1.8V
+2.5V
+3.3V
9V-10V
+3.3V
+5V
SCK
DB4
BUSY
DB8
DB2
DB14
DB11
DB16
DB9
DB1
DB3
DB10
DB17
CLK
DB6
CNVST_33
DC590_DETECT
DB13
SDO
DB7
DB12
CLKOUT
DB0
DB15
DB5
RD
SCK
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DC1805A
22
LTC6362 DRIVING 18 - BIT SAR ADC
N/A
LTC6362CMS8
NC
ERJON Q.
6-1-11
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DC1805A
22
LTC6362 DRIVING 18 - BIT SAR ADC
N/A
LTC6362CMS8
NC
ERJON Q.
6-1-11
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DC1805A
22
LTC6362 DRIVING 18 - BIT SAR ADC
N/A
LTC6362CMS8
NC
ERJON Q.
6-1-11
+1.8 V
CNTRL
POWER
VCCIO
GND
9V-10V
0402 X 8 PLCS
0402 X 3 PLCS
0402
+3.3 V
+2.5 V
+5 V
IO21
IO38
IO56
IO68
IO86
JTAG
+3.3V
+2.5V
0402
C37
10uF
6.3V
C37
10uF
6.3V
E6E6
C47
0.1uF
C47
0.1uF
R42
1.69k
R42
1.69k
C49
0.1uF
C49
0.1uF
U14
LT1763CS8-2.5
U14
LT1763CS8-2.5
OUT 1
SEN 2
GND
3
BYP 4
SHDN
5
GND
6
GND
7
IN
8
U13F
EPM240T
U13F
EPM240T
VCCINT
13
VCCINT
63
VCCIO1
9
VCCIO1
31
VCCIO2
94
VCCIO1
45
VCCIO2
59
VCCIO2
80
GND 10
GND 11
GND 32
GND 46
GND 60
GND 93
GND 65
GND 79
C34
22uF
1210
16V
C34
22uF
1210
16V
C42
0.01uF
C42
0.01uF
C41
1uF
16V
C41
1uF
16V
C53
0.1uF
C53
0.1uF
U12
LT1763CS8
U12
LT1763CS8
OUT 1
SEN 2
GND
3
BYP 4
SHDN
5
GND
6
GND
7
IN
8
C43
10uF
6.3V
C43
10uF
6.3V
R44
33
R44
33
C45
0.01uF
C45
0.01uF
U11
LT1763CS8-1.8
U11
LT1763CS8-1.8
OUT 1
SEN 2
GND
3
BYP 4
SHDN
5
GND
6
GND
7
IN
8
R36
1K
R36
1K
E4E4
U13E
EPM240T
U13E
EPM240T
GCLK0
12
GCLK1
14
GCLK2
62
GCLK3
64
DEV_OE
43
DEV_CLRN
44
TMS
22
TDI
23
TCK
24
TDO
25
C46
10uF
6.3V
C46
10uF
6.3V
E8E8
U13D
EPM240T
U13D
EPM240T
IO76 76
IO77 77
IO78 78
IO81 81
IO82 82
IO83 83
IO84 84
IO85 85
IO86 86
IO87 87
IO88 88
IO89 89
IO90 90
IO91 91
IO92 92
IO95 95
IO96 96
IO97 97
IO98 98
IO99 99
IO100 100
R34
10k
0402
R34
10k
0402
C52
0.1uF
C52
0.1uF
R37
1K
R37
1K
U13C
EPM240T
U13C
EPM240T
IO51 51
IO52 52
IO53 53
IO54 54
IO55 55
IO56 56
IO57 57
IO58 58
IO61 61
IO66 66
IO67 67
IO68 68
IO69 69
IO70 70
IO71 71
IO72 72
IO73 73
IO74 74
IO75 75
C39
0.01uF
C39
0.01uF
R41
2.80k
R41
2.80k
JP5JP5
C38
1uF
16V
C38
1uF
16V
U13B
EPM240T
U13B
EPM240T
IO26 26
IO27 27
IO28 28
IO29 29
IO30 30
IO33 33
IO34 34
IO35 35
IO36 36
IO37 37
IO38 38
IO39 39
IO40 40
IO41 41
IO42 42
IO47 47
IO48 48
IO49 49
IO50 50
R43
1.54k
R43
1.54k
U15
LT1763CS8-5
U15
LT1763CS8-5
OUT 1
SEN 2
GND
3
BYP 4
SHDN
5
GND
6
GND
7
IN
8
C40
10uF
6.3V
C40
10uF
6.3V
E3E3
C51
0.1uF
C51
0.1uF
J6
JP2X5/100
J6
JP2X5/100
12
3
56
4
78
10 9
C35
1uF
16V
C35
1uF
16V
R38
1K
R38
1K
E5E5
C54
0.1uF
C54
0.1uF
R40
1k
R40
1k
C36
0.01uF
C36
0.01uF
C48
0.1uF
C48
0.1uF
U13A
EPM240T
U13A
EPM240T
IO1 1
IO2 2
IO3 3
IO4 4
IO5 5
IO6 6
IO7 7
IO8 8
IO15 15
IO16 16
IO17 17
IO18 18
IO19 19
IO20 20
IO21 21
C44
1uF
16V
C44
1uF
16V
R39
10k
R39
10k
R35
300
R35
300
E7E7
C50
0.1uF
C50
0.1uF
10
dc1805af
DEMO MANUAL DC1805A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
LINEAR TECHNOLOGY CORPORATION 2012
LT 0412 • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the users responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and
observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC applica-
tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation