Texas Instruments DDC11XEVM-PDK - DDC11xEVM-PDK Evaluation Module DDC11XEVM-PDK DDC11XEVM-PDK 데이터 시트
제품 코드
DDC11XEVM-PDK
DS
Modulator
Digital
Filter
Digital
I/O
Control
Dual
Switched
Integrator
V
REF
CLK
DCLK
DVALID
DXMIT
DXMIT
DOUT
DIN
GAIN2
GAIN1
GAIN0
CONV
TEST
EXT CAP1A
EXT CAP1A
INPUT1
EXT CAP1B
EXT CAP1B
EXT CAP2A
EXT CAP2A
INPUT2
EXT CAP2B
EXT CAP2B
DDC112
Dual
Switched
Integrator
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Introduction
List of Tables
1
Input Ranges vs Gain Settings for the DDC112
.......................................................................
2
Jumper Setting Definitions for JP1 for the Voltage Reference Source for the DDC112
...........................
3
Range Selection of the DDC114
..........................................................................................
4
Power Option Jumpers for DDC114 DUT Board
.......................................................................
5
DDCMB LED Indicator Functions
.......................................................................................
6
DDC112EVM Bill of Materials
...........................................................................................
7
DDC114EVM Bill of Materials
...........................................................................................
8
DDCMB Bill of Materials
.................................................................................................
1
Introduction
The DDC11xEVM-PDK provides an easy-to-use platform for evaluating the DDC112 or DDC114 charge-
digitizing A/D converters. A PC interface board (DDCMB) and daughterboards for the DDC112 or DDC114
are included along with software that makes analysis and testing of these devices simple.
digitizing A/D converters. A PC interface board (DDCMB) and daughterboards for the DDC112 or DDC114
are included along with software that makes analysis and testing of these devices simple.
2
DDC112
The DDC112 is a dual input, precision, wide dynamic range, charge-digitizing A/D converter with 20-bit
resolution. The functional block diagram is shown in
resolution. The functional block diagram is shown in
. Low-level current output devices, such as
photo sensors, can be directly connected to the DDC112 input. The most stringent accuracy requirements
of many unipolar output sensor applications occur at low signal levels. The DDC112 combines the
functions of current-to-voltage conversion, integration, programmable full-scale, A/D conversion, and
digital filtering to produce precision, wide dynamic range results. Oversampling and digital filtering reduce
system noise dramatically. Correlated double sampling captures and eliminates steady state and
conversion cycle-dependent offset and switching errors that conventional analog circuits do not eliminate.
of many unipolar output sensor applications occur at low signal levels. The DDC112 combines the
functions of current-to-voltage conversion, integration, programmable full-scale, A/D conversion, and
digital filtering to produce precision, wide dynamic range results. Oversampling and digital filtering reduce
system noise dramatically. Correlated double sampling captures and eliminates steady state and
conversion cycle-dependent offset and switching errors that conventional analog circuits do not eliminate.
Figure 2. DDC112 Functional Block Diagram
3
SLAU234A – October 2007 – Revised July 2010
DDC11xEVM-PDK User's Guide
Copyright © 2007–2010, Texas Instruments Incorporated