HomedatasheetDDC112UK/1K

DDC112UK/1K Datasheet

ti DDC112, Dual Current Input 20-Bit Analog-to-digital Converter
Share:
Manufacturer

Description

Features, Applications

FEATURES

q MONOLITHIC CHARGE MEASUREMENT ADC q DIGITAL FILTER NOISE REDUCTION: 3.2ppm, rms q INTEGRAL LINEARITY: �0.005% Reading �0.5ppm FSR q HIGH PRECISION, TRUE INTEGRATING FUNCTION q PROGRAMMABLE FULL SCALE q SINGLE SUPPLY q CASCADABLE OUTPUT

DESCRIPTION

The is a dual input, wide dynamic range, chargedigitizing analog-to-digital converter (ADC) with 20-bit resolution. Low level current output devices, such as photosensors, can be directly connected to its inputs. Charge integration is continuous as each input uses two integrators; while one is being digitized, the other is integrating. For each of its two inputs, the DDC112 combines current-tovoltage conversion, continuous integration, programmable full-scale range, A/D conversion, and digital filtering to achieve a precision, wide dynamic range digital result. In addition to the internal programmable full-scale ranges, external integrating capacitors allow an additional user-settable full-scale range 1000pC. To provide single-supply operation, the internal ADC utilizes a differential input, with the positive input tied to V REF. When the integration capacitor is reset at the beginning of each integration cycle, the capacitor charges to VREF. This charge is removed in proportion to the input current. At the end of the integration cycle, the remaining voltage is compared to V REF. The high-speed serial shift register which holds the result of the last conversion can be configured to allow multiple DDC112 units to be cascaded, minimizing interconnections. The DDC112 is available or TQFP-32 package and is offered in two performance grades.

APPLICATIONS

DIRECT PHOTOSENSOR DIGITIZATION CT SCANNER DAS INFRARED PYROMETER PRECISION PROCESS CONTROL LIQUID/GAS CHROMATOGRAPHY BLOOD ANALYSIS

DCLK Dual Switched Integrator DVALID DXMIT DOUT DIN RANGE1 RANGE0
Control Dual Switched Integrator TEST CONV CLK

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

AVDD to DVDD....................................................................... to +6V AVDD to AGND..................................................................... to +6V DVDD to DGND..................................................................... to +6V AGND to DGND............................................................................... �0.3V VREF Voltage to AGND............................................ �0.3V to AVDD +0.3V Digital Input Voltage to DGND................................ �0.3V to DVDD +0.3V Digital Output Voltage to DGND............................. �0.3V to DVDD +0.3V Package Power Dissipation............................................. (TJMAX � TA)/JA Maximum Junction Temperature (TJMAX)...................................... +150�C Thermal Resistance, SO, JA.................................................... +150�C/W Thermal Resistance, TQFP, JA................................................ +100�C/W Lead Temperature (soldering, 10s)............................................... +300�C NOTE: (1) Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. Exposure to absolute maximum conditions for extended periods may affect device reliability.

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.

MAXIMUM INTEGRAL LINEARITY ERROR �0.025% Reading �1.0ppm FSR SPECIFICATION TEMPERATURE RANGE to +85�C PACKAGE DESIGNATOR(1) DW ORDERING DDC112YK/250 DDC112YK/2K TRANSPORT MEDIA Rails Tape and Reel Rails Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel

NOTES: (1) For the most current specifications and package information, refer to our web site at www.ti.com. (2)Models with a slash are available only in Tape and Reel in the quantities indicated (e.g., /1K indicates 1000 devices per reel). Ordering 1000 pieces of "DDC112U/1K" will get a single 1000-piece Tape and Reel.

= +25�C, AVDD = DVDD DDC112U, Y: TINT = 500�s, CLK 10MHz, DDC112UK, YK: TINT = 333.3�s, CLK = 15MHz, VREF = +4.096V, continuous mode operation, and internal integration capacitors, unless otherwise noted. DDC112U, Y PARAMETER ANALOG INPUTS External, Positive Full-Scale Range 0 Internal, Positive Full-Scale Range 1 Range 2 Range 3 Range 4 Range 5 Range 6 Range 7 Negative Full-Scale Input DYNAMIC CHARACTERISTICS Conversion Rate Integration Time, TINT Integration Time, TINT System Clock Input (CLK) Data Clock (DCLK) ACCURACY Noise, Low Level Current Input(1) CONDITIONS MIN TYP MAX MIN DDC112UK, YK TYP MAX UNITS

No Missing Codes Input Bias Current Range Error Range Error Match(5) Range Sensitivity to VREF Offset Error Offset Error Match(5) DC Bias Voltage(6) (Input VOS) Power Supply Rejection Ratio Internal Test Signal Internal Test Accuracy

�600 Bits % of FSR % of FSR ppm of FSR ppm of FSR mV ppm of FSR/V pC % ppm of FSR/�C ppm of FSR/minute �V/�C pA/�C pA ppm/�C V �A

PERFORMANCE OVER TEMPERATURE Offset Drift Offset Drift Stability DC Bias Voltage Drift Applied to Sensor Input Bias Current Drift to +45�C Input Bias Current +75�C (7) Range Drift Range (250pC) (5) Range Drift Match Range 5 (250pC) REFERENCE Voltage Input Current(8) DIGITAL INPUT/OUTPUT Logic Levels VIH VIL VOH VOL Input Current, IIN Data Format(9) POWER SUPPLY REQUIREMENTS Power Supply Voltage Supply Current Analog Current Digital Current Total Power Dissipation TEMPERATURE RANGE Specified Performance Storage

NOTES: (1) Input is less than 1% of full scale. (2) CSENSOR is the capacitance seen at the DDC112 inputs from wiring, photodiode, etc. (3) FSR is Full-Scale Range. (4) A best-fit line is used in measuring linearity. (5) Matching between side A and side B, not input 1 to input 2. (6) Voltage produced by the DDC112 at its input which is applied to the sensor. (7) Range drift does not include external reference drift. (8) Input reference current decreases with increasing TINT (see text). (9) Data format is Straight Binary with a small offset (see text). (10) Guaranteed but not tested.


Features

Parameters

Download DataSheet PDF View and Download


Manufacturer information

Warm Hint

What HQEW.NET can offer here?
1. www.hqew.net/product-data provides numerous and various electronic part data-sheet and technology document here., if it can't be shown, Please feel free to ask us for it.
2. www.hqew.net/news provides the latest information of the semiconductor industry or the electronics industry for you.
3. www.hqew.net provides verified suppliers and numerous electronic components for your demand and business.
Any questions you can contact us by email cs@hqew.net.
related datasheet
Browse Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9
Contact Us

+86-755-83536845

One to One Customer Service

17190417227