Linear Technology DC273A Demo Manual

4-/8-channel 24-bit power no latency adc

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Description

The LTC

2408, an 8-channel 24-bit no latency ∆∑ ADC is

featured on the DC273A demonstration board. The LTC2408

features a 4ppm linearity, 4ppm full-scale accuracy, 1ppm

offset accuracy, and 0.3ppm RMS noise.

The LTC2408 performs interleaved auto-zero and cali-

bration cycles which are transparent to the user.

The device does not require initialization or configuration,

other than selecting the multiplexer channel.

DEMO MANUAL DC273A

4-/8-Channel 24-Bit µPower

The board includes a precision 2.5V reference (LT1019-

2.5), as well as bypassing capacitors, and jumpers to select

line frequency rejection and on board /external reference.

The demonstration board is designed to be incorporated

into a target system, as well as give an example of good

placement of bypass and partitioning of an analog and

digital ground.

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 of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

Figure 1. DC273A Set-Up

No Latency ΔΣ ADC

LTC2408

dc273af

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Page 1 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 of Linear Technology Corporation. All other trademarks are the property of their respective owners. Figure 1. DC273A Set-Up...
Page 2: Parts List
All of the digital control lines are on a 0.070" header (J17). All ground connections should be as short as possible. On the DC273A demonstration board CSMUX and CSADC The multiplexer output is linked to the ADC through a 5k are tied together, as are SLK and CLK.
Page 3 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 4 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.

Ltc2408