DC1805A - Demo Manual

DEMO MANUAL DC1805A
LTC6362
Driving 18-Bit SAR ADC
Description
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
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DEMO MANUAL DC1805A
Description
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
Figure 2. DC1805A Test Diagram
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2
DEMO MANUAL DC1805A
Quick Start Procedure
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 distortion 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 onboard 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.
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.
controller using the supplied 14-conductor ribbon cable.
Run the evaluation software supplied with the DC590B or
download it from www.linear.com.
Connect the DC590B to a host PC with a standard USB
A/B cable. Connect the DC1805A to a DC590B USB serial
The correct control panel will be loaded automatically. Click
the Collect button to begin reading the ADC.
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DEMO MANUAL DC1805A
DC1805A Setup
DC Power
Reference
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.
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.
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 generator 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 removed. Slow rising edges may compromise the SNR of
the converter in the presence of high amplitude higher
frequency input signals.
R17
1k
R15
1k
AIN+
R26
1k
LTC6362
R27
1k
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 performance 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.
C27
NPO
3900pF
R18
35.7Ω
+
–
Analog Input
R28
35.7Ω
R19
0Ω
0402
+
C26
NPO
3900pF
R19
0Ω
0402
C29
NPO
3900pF
LTC2379-18
–
DC1805A F03
Figure 3. LTC6362 Ground Referenced Single-Ended to Differential Converter
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4
DEMO MANUAL DC1805A
DC1805A Setup
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.
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 writeprotection 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.
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.
Figure 4. PScope Screenshot
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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
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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
General BOM
DC1805A-C
1
1
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
General BOM
DC1805A-H
1
1
2
1
U8
IC., LTC2376CMS-18, MS16
Linear Technology, LTC2376CMS-18
3
1
R35
Resistor, Chip 300Ω, 1%, 0402
NIC, NRC04F3000TRF
dc1805af
7
A
B
C
D
AIN+
EXT VOCM
AIN-
CLK
100MHz Max
3.3Vpp
J3
BNC
R1
49.9
1206
R24
OPT
R23
0
E2
JP1
R11
OPT
R10
0
BNC
EXT VCM
BNC
C22
1uF
E9
J2
J1
5
C31
OPT
C13
OPT
C14
OPT
R2
1k
R5
0
R3
1k
2
5
3
R25
OPT
C33
OPT
R16
OPT
4
C32
OPT
6.3V
C23
OPT
6.3V
R12
0
R26
1K
R15
1K
R14
1K
R13
1K
U1
NC7SZ04P5X
C2
0.1uF
2
5
+3.3V
3
JP2
C15
0.1uF
U9
LTC6362CMS8
SHDN
PWR ON
4
+5V
U2
NC7SVU04P5X
C3
0.1uF
33
R4
7
C1
0.1uF
8
IN+
4
R17
1k
CLK
+5V
4.7uF
0805
C12
0.1uF
C16
0.01uF
0402
C24
R27
1k
IN-
C30
OPT
C25
OPT
R28
35.7
R18
35.7
C26
3900pF
NP0
1206
9V-10V
C4
0.1uF
C29
3900pF
NPO
1206
C27
3900pF
NPO
1206
4
3
2
1
GND
C18
0.1uF
R6
OPT
E1
-H
3
SDO
BUSY
RD
14
11
12
SDO
R20
1k
SCK
13
REF
GND
C8
0.1uF
CNV
SDO
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
2. INSTALL SHUNTS AS SHOWN.
RD
BUSY
2
J5
DC590
7
8
2
4
6
8
10
12
14
4
U6
NC7SZ04P5X
DC590_DETECT +3.3V
TO CPLD
HD2X7-079-MOLEX
1
3
5
7
9
11
13
4
1
R9
33
PR
VCC
SCK
CNV
2
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
9V-10V
OE
A
0.1uF
0805
C19
CLR
GND
2
C28
0.1uF
R8
33
SCALE = NONE
NC
ERJON Q.
PCB DES.
APP ENG.
APPROVALS
CNV
SCK
R22
2k
R21
1k
C6
0.1uF
C20
0.1uF
2
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.
B
6
4
U4
NL17SZ74
+3.3V
+3.3V
U7
NC7SZ66P5X
NOTE: UNLESS OTHERWISE SPECIFIED
LTC2376CMS-18
18
18
0.5
0.25
18
1.0
LTC2378CMS-18
-F
LTC2377CMS-18
18
1.6
LTC2379CMS-18
16
0.25
LTC2376CMS-16
BITS
16
16
16
R30
1k
ROL/SDI
BUSY
-D
-E
-G
SCK
SDO
9
JP3
REF
CNV
C9
47uF
6.3V
0805
MSPS
2.0
1.0
LTC2377CMS-16
0.5
U8
IN-
IN+
C10
0.1uF
C5
10uf
LTC2380CMS-16
LTC2378CMS-16
5
4
* U8
LTC23XXCMS
C11
10uF
6.3V
5
-A
-B
-C
R29
0
0402
R19
0
0402
C17
10uF
6.3V
+3.3V
GND
6
7
8
EXT REF
ASSY
*
+2.5V
GND
GND VOUT_S
VIN VOUT_F
SHDN
U3
LTC6655CHMS8-5
33
R7
1
Q
3
+3.3V
VDD
GND
3
8
REF/SEL
2
D
CP
Q
5
3
OVDD
GND
6
2
GND
10
15
GND
16
6
1
SHDN
VOCM
7
REF
CHAIN
1
5
VCC
GND
3
5
2
VV+
3
OUTOUT+
4
5
3
+3.3V
4
8
VCC
VSS
4
31
29
27
25
23
21
19
17
15
13
11
9
7
DB3
DB4
DB5
DB6
DB7
DB8
DB9
DB10
DB11
DB12
DB13
DB14
DB15
3
2
1
6
5
7
DATE:
N/A
SIZE
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
R33
4.99k
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
DATE
10-14-11
10-14-11
IC NO.
1
LTC6362CMS8
DC1805A
SHEET 1
OF
2
2
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
PROG
WP
R32
4.99k
3201S-40G1
1
3
TECHNOLOGY
JP4
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
DB16
DB17
CNVST_33
ERJON Q.
APPROVED
LTC6362 DRIVING 18 - BIT SAR ADC
TITLE: SCHEMATIC
A2
A1
A0
SCL
SDA
WP
33
DB2
R31
4.99k
35
5
37
39
J4
FROM CPLD
DB17
DB16
2
C7
0.1uF
PRODUCTION FAB
DB1
CLKOUT
U10
24LC024-I/ST
C21
0.1uF
+3.3V
1
DESCRIPTION
REVISION HISTORY
DB0
NC7SVU04P5X
U5
2
-
4
REV
ECO
5
8
3
5
A
B
C
D
DEMO MANUAL DC1805A
Schematic Diagram
dc1805af
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
A
B
C
D
IO21
IO20
IO19
IO18
IO17
IO16
IO15
IO8
IO7
IO6
IO5
IO4
IO3
IO2
IO1
21
20
19
18
17
16
15
8
7
7
5
3
1
8
6
4
2
C48
0.1uF
JP2X5/100
9
10
JTAG
J6
5
C50
0.1uF
IO50
IO49
IO48
IO47
IO42
IO41
IO40
IO39
IO38
IO37
IO36
IO35
IO34
IO33
IO30
IO29
50
49
48
47
42
41
40
39
38
37
36
35
34
33
30
29
28
27
26
C51
0.1uF
0402 X 8 PLCS
C49
0.1uF
IO21
R40
1k
0402
DB15
CLKOUT
5
R39
10k
DB14
4
CNVST_33
DB13
3
6
IO27
DB12
2
IO28
IO26
DB11
U13B
EPM240T
1
C47
0.1uF
+3.3V
+3.3V
U13A
EPM240T
R35
300
0402
R34
10k
0402
+3.3V
C52
0.1uF
C53
0.1uF
1K
R38
+1.8V
1K
R37
R36
1K
13
63
9
31
45
59
80
94
C54
0.1uF
CLK
IO38
BUSY
SCK
12
CNTRL
TDO
TCK
TDI
TMS
DEV_CLRN
DEV_OE
GCLK3
GCLK2
GCLK1
POWER
VCCINT
VCCINT
VCCIO1
VCCIO1
VCCIO1
VCCIO2
VCCIO2
VCCIO2
U13F
EPM240T
25
24
23
22
44
43
64
62
14
GCLK0
U13E
EPM240T
IO75
IO74
IO73
IO72
IO71
IO70
IO69
IO68
IO67
IO66
IO61
IO58
IO57
SCK
RD
IO56
IO55
IO54
IO53
IO52
IO51
SDO
0402 X 3 PLCS
33
R44
DC590_DETECT
U13C
EPM240T
75
74
73
72
71
70
69
68
67
66
61
58
57
56
55
54
53
52
51
4
GND
GND
GND
GND
GND
GND
GND
GND
4
10
11
32
46
60
93
65
79
IO96
DB2
IO100
IO99
IO98
IO97
IO95
DB1
DB0
IO92
IO91
IO90
IO89
IO88
IO87
IO86
IO85
IO84
IO83
IO82
IO81
IO78
IO77
IO76
DB17
DB16
IO68
IO56
U13D
EPM240T
100
99
98
97
96
95
92
91
90
89
88
87
86
85
84
83
82
81
78
77
76
DB10
DB9
DB8
DB7
IO86
DB6
DB5
DB4
DB3
GND
9V-10V
3
3
E4
E3
9V-10V
C34
22uF
16V
1210
5
8
5
8
5
8
SHDN
IN
LT1763CS8-5
U15
SHDN
IN
LT1763CS8-2.5
U14
SHDN
IN
U12
LT1763CS8
SHDN
1
4
2
BYP
SEN
OUT
BYP
SEN
OUT
BYP
SEN
OUT
BYP
SEN
OUT
1
4
2
1
4
2
1
4
2
2
SCALE = NONE
ERJON Q.
NC
APPROVALS
C45
0.01uF
C42
0.01uF
C39
0.01uF
C36
0.01uF
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
5
IN
U11
LT1763CS8-1.8
2
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
C44
1uF
16V
9V-10V
C41
1uF
16V
9V-10V
C38
1uF
16V
9V-10V
C35
1uF
16V
8
GND
GND
GND
3
6
7
GND
GND
GND
3
6
7
GND
GND
GND
3
6
7
GND
GND
GND
3
6
7
5
DATE:
N/A
SIZE
6-1-11
IC NO.
R41
2.80k
C46
10uF
6.3V
E8
E7
+3.3 V
+5 V
+2.5 V
E6
+1.8 V
1
LTC6362CMS8
DC1805A
SHEET
2
OF
2
2
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
+5V
E5
C40
10uF
6.3V
C43
10uF
6.3V
C37
10uF
6.3V
+3.3V
+2.5V
R43
1.54k
R42
1.69k
+1.8V
LTC6362 DRIVING 18 - BIT SAR ADC
TECHNOLOGY
JP5
TITLE: SCHEMATIC
+3.3V
VCCIO
+2.5V
1
A
B
C
D
DEMO MANUAL DC1805A
Schematic Diagram
dc1805af
9
DEMO MANUAL DC1805A
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 user’s 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 application engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
dc1805af
10 Linear Technology Corporation
LT 0412 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2012
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