DDC2256AZZF

Product Folder Sample & Buy Support & Community Tools & Software Technical Documents DDC2256A SLASED4B – MARCH 2016 – REVISED MAY 2016 DDC2256A 256-Channel, Current-Input Analog-To-Digital Converter 1 Features • 1 • • • • • • • • • • Single-Chip Solution to Directly Measure 256 LowLevel Currents Simultaneously User Adjustable Full-Scale Range Adjustable Speed with Integration Times as Low as 58.8 µs (17 KSPS per channel) with 24 bit Resolution Power Dissipation as Low as 1.7mW/channel Integral Linearity: ±0.025% of Reading ±1 ppm of Full Scale Reading (all channels active) Low Noise 24 bit ADC No Charge Loss and Simultaneous Sampling On-board Temperature Sensor In-Package Bypass Capacitors and Reference Buffer to Reduce PCB Area and Design Complexity Serial LVDS and CMOS Output Interface Option The DDC2256A operates from ±2.5-V analog supply, 1.8-V analog supply (AVDD_18) and 1.8-V digital supply (DVDD). The device is specified from 0°C to 70°C operating temperature and available in a 14 x 16 mm2 323-ball 0.8 mm-pitch BGA. Finally, the on board reference buffer and bypass capacitors help minimize the external component requirements and further reduce board space. To request a full data sheet or other design resources: request DDC2256A Device Information PART NUMBER DDC2256A PACKAGE NFBGA (323) (1) BODY SIZE (NOM) 16.0 mm x 14.0 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Block Diagram AVDD AVEE +2.5V -2.5V DVDD AVDD_18 VREF_IN 100nF 100nF 100nF 100nF 2 Applications • • • • • CT Scanner Data Acquisition System Photodiode Sensors X-ray Detection Systems Optical Fiber Power Monitoring Mutichannel Current/Voltage Instrumentation EN IN1 Dual Switched Integrator SEN Configuration and control IN2 SDIN SDOUT SCLK Dual Switched Integrator RESET SD ADC IN3 Dual Switched Integrator IN16 Dual Switched Integrator IN253 Dual Switched Integrator IN254 Dual Switched Integrator IN255 Dual Switched Integrator IN256 Dual Switched Integrator CLKP/CLKM 3 Description The DDC2256A is a 24-bit, 256-channel, currentinput analog-to-digital (A/D) converter. It combines both current-to-voltage integration and A/D conversion so that 256 individual low-level current output devices, such as photodiodes, can be directly connected to its inputs and digitized in parallel (simultaneously). For each of the inputs, the DDC2256A has one low noise/low power integrator designed to capture all the charge from the sensor. The integration time is adjustable from 58.8μs to 100 ms, allowing currents from fA to uA to be continuously measured with outstanding precision. The outputs of the integrators are digitized by sixteen 24-bit low power ADCs and all the resulting data is output over a single LVDS serial interface pair designed to minimize noise coupling in environments with high channel count. CONV Serial Interface DOUT SD ADC VRGND QGND AGND DGND Copyright © 2016, Texas Instruments Incorporated 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. DDC2256A SLASED4B – MARCH 2016 – REVISED MAY 2016 www.ti.com 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision A (April 2016) to Revision B • Added link to request full data sheet ...................................................................................................................................... 1 Changes from Original (March 2016) to Revision A • 2 Page Page Changed From: Product Preview To: Production .................................................................................................................. 1 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: DDC2256A DDC2256A www.ti.com SLASED4B – MARCH 2016 – REVISED MAY 2016 5 Device and Documentation Support 5.1 Documentation Support 1-A, Ultralow-Noise Negative Voltage Regulator, SBVS169 5.2 Community Resources The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support. 5.3 Trademarks E2E is a trademark of Texas Instruments. 5.4 Electrostatic Discharge Caution These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 5.5 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 6 Mechanical, Packaging, and Orderable Information The following pages include mechanical packaging and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: DDC2256A 3 DDC2256A SLASED4B – MARCH 2016 – REVISED MAY 2016 www.ti.com PACKAGE OUTLINE ZZF0323A NFBGA - 1.66 mm max height BGA 4219317/C 07/2014 NOTES: 1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing per ASME Y14.5M. 2. This drawing is subject to change without notice. www.ti.com 4 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Product Folder Links: DDC2256A PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) DDC2256AZZF ACTIVE NFBGA ZZF 323 84 RoHS & Green SNAGCU Level-3-260C-168 HR 0 to 70 DDC2256A (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of