LINEAR DC1186A Development Boards Kits User Manual
- June 13, 2024
- LINEAR
Table of Contents
LINEAR DC1186A Development Boards Kits
Product Information
The DC1186A is a demo board for the LTC2308, a 500ksps, 8-channel, 12-bit ADC. It can be used to evaluate the performance of the LTC2308 in various applications. Design files for this circuit board can be downloaded from http://www.linear.com/demo.
Product Usage Instructions
DC890 Quick Start Procedure
- Connect the DC1186A to a DC890 USB high-speed data collection board via connector J4.
- Connect the DC890 to a host PC with a standard USB A/B cable.
- Apply 6VDC to 9VDC to the 6-9VDC and GND terminals.
- Apply a low jitter signal source to CH0 through CH7 on connectors J1 or J2, as determined by jumper block JP5.
- As a clock source, apply a low jitter 40MHz 14dBm sine wave or square wave to connector J5. Note that J5 has a 50 termination resistor to ground, which will prevent most logic from driving this pin directly.
- Run the PScope software (Pscope.exe version K49 or later) supplied with the DC890, or download it from http://www.linear.com/software. 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.
Pscope Software Configuration
The PScope software will recognize the DC1186A and configure itself
automatically. The default configuration is for CH0 concerning COM in unipolar
mode.
- Make sure that the jumpers are set as shown in Figure 2. If bipolar mode is desired, it will be necessary to change the PScope user configure setting.
- Select ADC Configuration from the Configure menu.
- Select Configure Manually, 12-Bits, Alignment 12, S2308, 1-Channel, and do not check Positive_Edge Clk. Check Bipolar if the JP5 UNI jumper is set to GND. An example of the user configure menu is shown in Figure 3.
- Click the Collect button (see Figure 4) to begin acquiring data. Depending on which board was previously used by PScope, it may be necessary to press Collect a second time. The Collect button then changes to Pause, which can be used to pause data acquisition.
DC590 Quick Start Procedure
- Connect DC1186A to a DC590 USB serial controller via the supplied 14-conductor ribbon cable.
- Connect DC590 to a host PC via a standard USB A/B cable.
- Run the evaluation software supplied with DC590, or download it from http://www.linear.com/software. The correct control panel will be loaded automatically.
DESCRIPTION
Demonstration circuit 1186A features the LTC®2308 500ksps, 8-channel, 12-bit
ADC. The LTC2308 has an SPI-compatible serial interface that can be used to
select a channel, unipolar/bipolar, and power-down settings. DC1186A
demonstrates the DC and AC performance of the LTC2308.
Use the DC590 controller with QuikEval™ software to demonstrate DC performance
such as peak-to-peak noise and
DC linearity. Use the DC890 controller with PScope™ software if precise sampling rates are required or to demonstrate AC performance such as SNR, THD, SINAD, and SFDR. Alternatively, by connecting DC1186A to a customer application, the performance of the LTC2308 can be evaluated directly in that circuit.
Design files for this circuit board are available at http://www.linear.com/demo
BOARD PHOTO
Figure 1. DC1186A Connection Diagram
DC890 QUICK START PROCEDURE
- Connect the DC1186A to a DC890 USB high-speed
data collection board via connector J4. - Connect the DC890 to a host PC with a standard USB A/B cable.
- Apply 6VDC to 9VDC to the 6-9VDC and GND terminals.
- Apply a low jitter signal source to CH0 through CH7 on connectors J1 or J2, as determined by jumper block JP5.
- As a clock source, apply a low jitter 40MHz 14dBm sine wave or square wave to connector J5. Note that J5 has a 50Ω termination resistor to ground, which will prevent most logic from driving this pin directly.
- Run the PScope software (Pscope.exe version K49 or later) supplied with the DC890, or download it from www.linear.com/software. 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.
**PSCOPE SOFTWARE CONFIGURATION
**
The PScope software will recognize the DC1186A and configure itself automatically. The default configuration is for CH0 with respect to COM in unipolar mode.
- Make sure that the jumpers are set as shown in Figure 2. If bipolar mode is desired, it will be necessary to change the PScope user configure setting.
- Select ADC Configuration from the Configure menu.
- Select Configure Manually, 12-Bits, Alignment 12, S2308, 1-Channel, and do not check Positive_Edge Clk. Check Bipolar if the JP5 UNI jumper is set to GND. An example of the user configure menu is shown in Figure 3.
- Click the Collect button (see Figure 4) to begin acquiring data. Depending on which board was previously used by PScope, it may be necessary to press Collect a second time. The Collect button then changes to Pause, which can be used to pause data acquisition.
Figure 2. DC1186A Jumpers
Figure 3. User Configure Menu
Figure 4. DC1186A PScope Screenshot
DC590 QUICK START PROCEDURE
- Connect DC1186A to a DC590 USB serial controller via the supplied 14-conductor ribbon cable.
- Connect DC590 to a host PC via a standard USB A/B cable.
- Run the evaluation software supplied with DC590, or download it from www.linear.com/software. The correct control panel will be loaded automatically.
- Click the COLLECT button to begin reading the ADC.
- Change the channel and range by right-clicking over the channel or range indicator in the display, as shown in Figure 5.
Figure 5. DC1186A QuikEval Screenshot
HARDWARE SETUP
SIGNAL CONNECTIONS
- J1-J2: SMA and Header Connectors for CH0-CH7, COM and DC Bias. Limits input voltage swings to 0V to 5V. For optimum performance, the input should be band-limited to the frequencies of interest. See Figure 6 for details.
- J3: Contains CONV, SDI, SCK and a buffered SDO signal. This connector is intended to monitor these signals. For those who want to drive the ADC directly, use J6.
- J4: Interface to the DC890. Do not use J6 at the same time.
- J5: Conversion Clock Input. This input has a 50Ω termi-nation resistor, and is intended to be driven by a 14dBm sine or square wave. To achieve the full AC performance of this part, the clock jitter should be kept under 20. This input is capacitively coupled to a clock buffer so that level
- shifting is not required. To run at maximum conversion rate, apply a 40MHz signal to this connector. J5 is used only for the DC890. DC590 generates its own clock signal.
- J6: Interface to DC590. Do not use J4 at the same time. This connector can also be used to drive the ADC directly. See Figure 7 for details.
JUMPERS
- JP1 (CH0): Selects whether the SMA connector, J1, is connected to CH0 of the ADC, or floating.
- JP2 (DC Bias): Selects Refcomp, or an external bias voltage to be divided by 2, which can then be used as a bias point for the minus input of the ADC in bipolar mode.
- JP3 (COM): Selects whether the COM pin of the ADC is to be cleanly grounded near the ADC or driven by header J2.
- JP4 (OVDD): Connects the OVDD pin of the ADC to 5V or to an external voltage. The SDO pin swings from ground to OVDD.
- JP5 (DIN Word): Selects the channel configuration, uni-polar/bipolar and power-down settings of the ADC. See Table 1 for details. JP5 is used by the DC890 only. It is ignored by the DC590.
GROUNDING AND POWER CONNECTION
Connect a 6V to 9V power supply to the 6-9VDC and GND posts when using DC890.
If DC590 is used, it will provide power to DC1186A. For optimum performance,
this supply should be floating with respect to any signal generators connected
to the analog inputs.
HARDWARE SETUP
Table 1. LTC2308 Channel Configuration
S/D| O/S| S1| S0| 0| 1| 2| 3| 4|
5| 6| 7| COM
---|---|---|---|---|---|---|---|---|---|---|---|---
0| 0| 0| 0| +| –| | | | | | |
0| 0| 0| 1| | | +| –| | | | |
0| 0| 1| 0| | | | | +| –| | |
0| 0| 1| 1| | | | | | | +| –|
0| 1| 0| 0| –| +| | | | | | |
0| 1| 0| 1| | | –| +| | | | |
0| 1| 1| 0| | | | | –| +| | |
0| 1| 1| 1| | | | | | | –| +|
1| 0| 0| 0| +| | | | | | | | –
1| 0| 0| 1| | | +| | | | | | –
1| 0| 1| 0| | | | | +| | | | –
1| 0| 1| 1| | | | | | | +| | –
1| 1| 0| 0| | +| | | | | | | –
1| 1| 0| 1| | | | +| | | | | –
1| 1| 1| 0| | | | | | +| | | –
1| 1| 1| 1| | | | | | | | +| –
Parts List
ITEM| QTY| REFERENCE| PART DESCRIPTION|
MANUFACTURER/PART NUMBER
---|---|---|---|---
Required Circuit Components
1| 17| C1, C3, C4, C23-C35, C37| CAP., X7R, 0.1µF, 10V, 10%, 0603| AVX,
0603ZC104KAT
---|---|---|---|---
2| 4| C2, C15, C20, C38| CAP., X5R, 10µF, 6.3V, 20%, 0603| TDK, C1608X5R0J106M
3| 2| C5, C36| CAP., X5R, 2.2µF, 16V, 20%, 0603| TDK, C1608X5R1C225M
4| 9| C6-C14| CAP., NPO, 47pF, 50V, 10%, 0603| AVX, 06035A470KAT1A
5| 3| C16, C18, C22| CAP., X7R, 1µF, 10V, 10%, 0603| AVX, 0603ZD105KAT1A
6| 2| C17, C21| CAP., X7R, 0.01µF, 16V, 10%, 0603| AVX, 0603YC103KAT1A
7| 1| C19| CAP., X5R, 100µF, 6.3V, 10%, 1210| AVX, 12106D107KAT2A
8| 22| E2-E11, E13, E14, E16, E18-E26| TP, TURRET, 0.061″| MILL-MAX,
2308-2-00-80-00-00-07-0
9| 0| E1, E12 (OPT)| |
10| 2| E15, E17| TP, TURRET, 0.094″| MILL-MAX, 2501-2-00-80-00-00-07-0
11| 4| JP1-JP4| JMP, 1×3, 0.100″| SAMTEC, TSW-103-07-L-S
12| 10| JPX1-JPX10| SHUNT, 0.100″ CENTER| SAMTEC, SNT-100-BK-G
13| 1| JP5| JMP, 3×8, 0.100″| SAMTEC, TSW-108-07-L-T
14| 2| J5, J1| CON., SMA 50Ω EDGE-LAUNCH| E. F. JOHNSON, 142-0701-851
15| 1| J2| HEADER 12×2| SAMTEC, TSW-112-07-L-D
16| 1| J3| HEADER 4×2| SAMTEC, TSW-104-07-L-D
17| 0| J4| DO NOT INSTALL|
---|---|---|---|---
18| 1| J6| HEADER, 2×7 PIN, 0.079″| MOLEX, 87831-1420
19| 0| R1 (OPT)| RES., CHIP, 1206|
20| 1| R18| RES., CHIP, 49.9, 1/4W, 1%,1206| AAC, CR18-49R9FM
21| 1| R9| RES., CHIP, 49.9, 1/10W, 1%, 0603| AAC, CR16-49R9FM
22| 9| R2, R3, R5-R8, R10-R12| RES., CHIP, 100Ω, 1/10W, 1%, 0603| VISHAY,
CRCW0603100RFKED
23| 1| R4| RES., CHIP, 301Ω, 1/10W, 1%, 0603| VISHAY, CRCW0603301RFKEA
24| 6| R13, R14, R25, R26, R30, R31| RES., CHIP, 4.99k, 1/10W, 1%, 0603| AAC,
CR16-4991FM
25| 1| R15| RES., CHIP, 10Ω, 1/10W, 5%, 0603| AAC, CR16-100JM
26| 2| R16, R19| RES., CHIP, 1k, 1/10W, 5%, 0603| AAC, CR16-102JM
27| 5| R17, R20, R21, R22, R24| RES., CHIP, 33Ω, 1/10W, 5%, 0603| AAC,
CR16-330JM
28| 1| R23| RES., CHIP, 4.7k, 1/10W, 5%, 0603| AAC, CR16-472JM
29| 1| R27| RES., CHIP, 2k, 1/10W, 1%, 0603| AAC, CR16-2001FM
30| 2| R28, R29| RES., CHIP, 2.49k, 1/10W, 1%, 0603| AAC, CR16-2491FM
31| 1| R32| RES., CHIP, 3k, 1/10W, 1%, 0603| VISHAY, CRCW06033K00FKEA
32| 4| MTGS AT 4 CORNERS| STANDOFF, NYLON 0.25, 1/4″| KEYSTONE, 8831 (SNAP-ON)
33| 1| U1| I.C., LTC2308CUF, 24-PIN QFN| LINEAR TECHNOLOGY, LTC2308CUF
34| 2| U2, U7| I.C., NC7SVU04P5X, SC70-5| FAIRCHILD SEMI., NC7SVU04P5X
35| 1| U3| I.C., SN74AHCT1G04DCK| TEXAS INSTRUMENTS, SN74AHCT1G04DCK
36| 1| U4| I.C., LT1761ES5-2.5, SOT23-5| LINEAR TECHNOLOGY, LT1761ES5-2.5
37| 1| U5| I.C., LT1761ES5-5, SOT23-5| LINEAR TECHNOLOGY, LT1761ES5-5
38| 3| U6, U14, U15| I.C., NC7SZ04P5X, SC70-5| FAIRCHILD SEMI., NC7SZ04P5X
39| 3| U8, U11, U12| I.C., LT1719CS6, SOT23-6| LINEAR TECHNOLOGY, LT1719CS6
40| 1| U9| I.C., NC7SZ66P5X, SC70-5| FAIRCHILD SEMI., NC7SZ66P5X
41| 1| U10| I.C., NL17SZ74USG, US8| ON SEMI, NL17SZ74USG
42| 1| U13| I.C. 24LC025, TSSOP-8| MICROCHIP, 24LC025-I /ST (PbF)
Schematic Diagram
Figure 6. LTC2308CUF 8-Channel, Low Noise, 500ksps ADC
Figure 7. LTC2308CUF 8-Channel, Low Noise, 500ksps ADC
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 application 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 an LTC application engineer.
Mailing Address:
Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004,
Linear Technology Corporation
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
408-432-1900 FAX :
408-434-0507
www.linear.com
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LINEAR TECHNOLOGY CORPORATION 2013
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References
- Mixed-signal and digital signal processing ICs | Analog Devices
- Design Tools & Calculators | Design Center | Analog Devices