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Name: DDC112UG4
Brand: Texas Instruments
SKU: DDC112UG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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Texas Instruments DDC112UG4

Part No.:: DDC112UG4

Manufacturer:: Texas Instruments

Package:: 28-SOIC (0.295, 7.50mm Width)

Datasheet:: DDC112UG4.pdf

Description:: IC ADC 20BIT SIGMA-DELTA 28SOIC

In Stock:: 3392

Quantity:: Add To Cart

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DDC112UG4 Specifications

Packaging:
Tube
Series:
-
Product Status:
Discontinued at Mosen
Number of Bits:
20
Sampling Rate(PerSecond):
3k
Number of Inputs:
2
Input Type:
Single Ended
Data Interface:
SPI
Configuration:
DSI-ADC
Ratio-S/H:ADC:
2:1
Number of A/D Converters:
1
Architecture:
Sigma-Delta
Reference Type:
External
Voltage-Supply Analog:
5V
Voltage-Supply Digital:
5V
Features:
Simultaneous Sampling
Operating Temperature:
-40°C ~ 85°C

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DDC112UG4 information

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DDC112UG4 Typical application Circuitry

DDC112UG4

The DDC112UG4 is a highly precise, dual-channel, 20-bit analog-to-digital converter (ADC) with integrated current sources, designed specifically for direct connection to photodiodes. Manufactured by Texas Instruments, it is tailored for applications that demand accurate and low-noise conversion of small current signals to digital values. This makes it particularly suitable for scientific instrumentation, medical imaging devices, and industrial measurement systems where precise light intensity or optical signal measurements are critical.

Key Features and Specifications:

- Resolution: 20-bit precision offers high-resolution measurements, crucial for detecting minute changes in signal.

- Channels: Dual-channel input allows for simultaneous measurements from two separate sources, enhancing data acquisition efficiency.

- Integrated Current Sources: Facilitates direct connection to photodiodes, simplifying circuit design and reducing external component requirements.

- Low Noise: Engineered for low noise performance, ensuring high signal integrity for sensitive measurements.

- Power Supply: Operates with a single 5V supply, minimizing power requirements for the system.

Application Scenario: The DDC112UG4 is ideal for use in a laboratory-grade spectrophotometer, where it converts the light intensity received by photodiodes into digital data for quantitative analysis of sample absorption or transmission properties.

Circuit Design Integration:

Designing a spectrophotometer with the DDC112UG4 involves detailed consideration of its pin configuration and optimal electrical connections:

1. Photodiode Connections (PD1, PD2; typically Pins 1 and 2 for channel inputs): Connect the cathodes of the photodiodes to PD1 and PD2 for direct current input from light detection. It's critical to ensure minimal path resistance and to shield these connections from external noise sources.

2. Reference Voltage (REFGND, REFIN; typically Pins 18 and 19): Establish a stable reference voltage by connecting a precision reference to these pins. The stability and accuracy of the reference voltage are vital for maintaining the measurement accuracy across the ADC's full dynamic range.

3. Digital Interface (SDATA, SCLK, CS, DRDY; Pins 11, 12, 13, and 14 respectively): Interface these pins with a microcontroller or digital signal processor. Utilize SPI protocol for data communication, ensuring fast and reliable transfer of measurement data from the ADC.

4. Power Supply and Grounding (AVDD, DVDD, AGND, DGND; Pins 20, 10, 21, and 9): Connect AVDD and DVDD to a regulated 5V power supply. Implement separate analog and digital grounds (AGND and DGND) to minimize noise interference between the ADC's analog and digital sections.

5. Clock Input (MCLK; Pin 15): Provide a stable clock signal to the MCLK pin to drive the internal ADC conversion process. The choice of clock source should consider both stability and phase noise to optimize performance.

Design Considerations:

- Photodiode Selection: Opt for photodiodes with suitable spectral response and sensitivity for the target application, considering the spectral properties of the samples being analyzed.

- Signal Integrity: Employ careful routing and shielding techniques for analog signals to protect against electromagnetic interference, which can degrade measurement accuracy.

- Thermal Management: Although the DDC112UG4 is designed for low power consumption, overall system design should consider thermal impacts, particularly in enclosed or multi-component assemblies.

- Firmware Development: Develop firmware for initializing and configuring the DDC112UG4, managing data acquisition cycles, and processing the digital output data. Incorporating error handling and calibration routines can further improve system reliability and accuracy.

- Optical System Integration: In a spectrophotometer, integrating the DDC112UG4 requires careful alignment with the optical components to ensure efficient light detection and minimize losses or reflections that could affect measurement quality.

Implementing the DDC112UG4 in a spectrophotometer underscores its capabilities in high-precision optical measurement systems, highlighting its importance in applications that depend on accurate and reliable light intensity measurements for analysis or quality control.

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All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the DDC112UG4 we delivered, we will accept the replacement or return of the DDC112UG4 only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of DDC112UG4.

(3)The PartNo is unused and only in the original unpacked packaging.

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(1)Inform us within 90 days

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