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dc1011af

DEMO MANUAL DC1011A

Description

LTC2498, LTC2496, LTC2494

24-bit/16-bit, 8-/16-Channel, Easy Drive

ΔS ADC with SPI Interface

Demonstration Circuit 1011A-A features the LT C

2498

8-/16-channel, 24-bit Delta Sigma ADC with Easy Drive™

inputs. Key DC specifications include 2ppm INL, 1ppm

offset, 25ppm full-scale error and 10nV/°C offset drift. In

the 6.9Hz/280nV

RMS

mode, input normal mode rejection

of 50Hz and 60Hz noise is better than 87dB.

DC1011A-B features the LTC2496 16-bit Δ∑ ADC that is

pinout and software compatible with the LTC2498.

DC1011A-C features the LTC2494 16-bit Δ∑ ADC with

internal PGA and temperature sensor.

DC1011A is a member of Linear Technology’s QuikEval™

family of demonstration boards. It is designed to allow

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Easy

Drive and QuikEval are trademarks of Linear Technology Corporation. All other trademarks are

the property of their respective owners.

easy evaluation of the LTC2498, LTC2496 or LTC2494

and may be connected directly to the target application’s

analog signals while using the DC590 USB Serial Control-

ler board and QuikEval software to measure performance.

The exposed ground planes allow proper grounding to

prototype circuitry. After evaluating with LT C ’s software,

the digital signals can be connected to the application’s

processor/controller for development of the serial interface.

Design files for this circuit board are available at

http://www.linear.com/demo

Figure 1. Proper Measurement Equipment Setup

Summary of content (6 pages)

PAGE 1
DEMO MANUAL DC1011A LTC2498, LTC2496, LTC2494 24-bit/16-bit, 8-/16-Channel, Easy Drive ΔS ADC with SPI Interface Description Demonstration Circuit 1011A-A features the LTC®2498 8-/16-channel, 24-bit Delta Sigma ADC with Easy Drive™ inputs. Key DC specifications include 2ppm INL, 1ppm offset, 25ppm full-scale error and 10nV/°C offset drift. In the 6.9Hz/280nVRMS mode, input normal mode rejection of 50Hz and 60Hz noise is better than 87dB.
PAGE 2
DEMO MANUAL DC1011A Quick Start Procedure Connect the DC1011A to a DC590 USB Serial Controller using the supplied 14-conductor ribbon cable. Connect DC590 to host PC with a standard USB A/B cable. Run the evaluation software supplied with DC590 or downloaded from www.linear.com/software. The correct program will be loaded automatically. Click the COLLECT button to start reading the input voltage.
PAGE 3
DEMO MANUAL DC1011A Hardware Setup Analog Connections Analog signal connections are made via the row of turret posts along the edge of the board. Also, if you are connecting the board to an existing circuit, the exposed ground planes along the edges of the board may be used to form a solid connection between grounds. GND: Ground turrets are connected directly to the internal analog ground plane. PWR GND: Power ground, connected to the power return trace. VCC: This is the supply for the ADC.
PAGE 4
DEMO MANUAL DC1011A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER CAP., CHIP X7R 0.01µF 16V AVX, 0603YC103KAT1A 0603 Required Circuit Components 1 4 C3, C7, C10, C13 2 2 C11, C15 CAP., CHIP X7R 0.1µF 16V 10% AVX, 0603YC104MAT1A 0603 3 1 C29 CAP., CHIP X5R 1µF 10V TAIYO YUDEN, LMK107BJ105KA 0603 4 3 C2, C9, C12 CAP., CHIP X5R 4.7µF 6.3V TAIYO YUDEN, JMK212BJ475MG 0805 CAP., CHIP X5R 10µF 6.
PAGE 5
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. D C B 1 NOTES: C15 0.
PAGE 6
DEMO MANUAL DC1011A 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.