Linear Technology DC1996A-A Demo Manual

Ltc2323/ltc2321 family, dual 16-bit/14-bit/12-bit, 5msps/2msps, serial, high speed sar adcs

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DESCRIPTION
Demonstration circuit 1996A features the
With up to 5Msps, these differential, dual channel, 16-bit,
serial, high speed successive approximation register
(SAR) ADCs are available in a 28-lead QFN package. The
LTC2323 family has an internal 20ppm/°C reference and
an SPI-compatible serial interface that supports CMOS
and LVDS logic. Note the demo board is configured for
CMOS operation by default; see the note under JP3 for
LVDS operation. The following text refers to the LTC2323,
but applies to all members of the family, the only differ-
ence being the sample rate and the number of bits. The
BOARD PHOTO
BPF
HP8642B
LTC
2323
family.
®
DC POWER SUPPLY
–9.5V
GND 9.5V
DC
DC
Figure 1. DC1996A Connection Diagram
DEMO MANUAL DC1996A
LTC2323/LTC2321
Dual 16-Bit/14-Bit/12-Bit,
5Msps/2Msps, Serial,
High Speed SAR ADCs
DC1996A demonstrates the DC and AC performance of
the LTC2323 in conjunction with the DC890 PScope™
data collection board. Alternatively, by connecting the
DC1996A into a customer application, the performance
of the LTC2323 can be evaluated directly in that circuit.
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 PScope
is a trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
dc1996a F02
BPF
HP8642B
DC890
TO PC USB PORT
dc1996afb
1

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Summary of Contents for Linear Technology DC1996A-A

  • Page 1 CMOS operation by default; see the note under JP3 for L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and PScope LVDS operation. The following text refers to the LTC2323, is a trademark of Linear Technology Corporation. All other trademarks are the property of their but applies to all members of the family, the only differ- respective owners.
  • Page 2: Assembly Options

    DEMO MANUAL DC1996A ASSEMBLY OPTIONS Table 1. DC1996A Assembly Options VERSION U1 PART NUMBER MAX CONVERSION RATE # OF BITS MAX CLOCK FREQUENCY DC1996A-A LTC2323CUFD-16#PBF 5Msps 110MHz DC1996A-B LTC2321CUFD-16#PBF 2Msps 64MHz DC1996A-C LTC2323CUFD-14#PBF 5Msps 110MHz DC1996A-D LTC2321CUFD-14#PBF 2Msps 62MHz DC1996A-E...
  • Page 3: Hardware Setup

    DEMO MANUAL DC1996A HARDWARE SETUP SIGNAL CONNECTIONS JP3 Data Out: Use this jumper to select the data output format from the LTC2323. The default setting is CMOS. J1 CLK IN: This input has a 50Ω termination resistor, The output data will not be valid if the jumper is moved and is intended to be driven by a low jitter 10dBm sine or to the LVDS position unless the following changes have square wave.
  • Page 4: Parts List

    DEMO MANUAL DC1996A HARDWARE SETUP JP9 –IN1 Coupling: Use this jumper to select AC- or DC- JP11 VDD: Use this jumper to select the VDD supply volt- coupling of the signal applied to J5. The default setting age. The default setting is 5V. The 3.3V setting selects a is DC.
  • Page 5 PANASONIC, ERJ-3EKF1000V U2, U3, U7 IC, INVERTER, UHS, SINGLE, SC70-5 FAIRCHILD, NC7SZ04P5X U4, U5 IC, 400MHz, AMPLIFIER, MS8 LINEAR TECHNOLOGY, LT1819CMS8#PBF IC, FLIP FLOP, D-TYPE LOG, US8 ON SEMI., NL17SZ74USG U8, U9 IC, VOLTAGE REFERENCE, MSOP8 LINEAR TECHNOLOGY, LTC6655BHMS8- 4.096#PBF...
  • Page 6 SHOWN ON ASSY DWG SHUNT, 0.100", 2POS SAMTEC, SNT-100-BK-G MH1-MH4 STANDOFF, NYLON, 0.25" KEYSTONE, 8831 (SNAP-ON) DC1996A-A Required Circuit Components DC1996A GENERAL BOM R67, R73 RES., CHIP, 1k, 1/16W, 5%, 0402 PANASONIC, ERJ-2EKF1001V I.C., DUAL SAR ADC, QFN28UFD-4X5 LINEAR TECHNOLOGY, LTC2323CUFD-16#PBF...
  • Page 7: Schematic Diagrams

    DEMO MANUAL DC1996A SCHEMATIC DIAGRAMS dc1996afb...
  • Page 8 DEMO MANUAL DC1996A SCHEMATIC DIAGRAMS dc1996afb...
  • Page 9 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.
  • Page 10 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.
  • Page 11 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Analog Devices Inc. DC1996A-C DC1996A-E DC1996A-F DC1996A-A DC1996A-B DC1996A-D...

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