Part Number: ADC128D818CIMTX/NOPB

Manufacturer: Texas Instruments


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Technical Specifications of ADC128D818CIMTX/NOPB

Datasheet  ADC128D818CIMTX/NOPB datasheet
Category Integrated Circuits (ICs)
Family Data Acquisition – Analog to Digital Converters (ADC)
Manufacturer Texas Instruments
Packaging Tape & Reel (TR)
Part Status Active
Number of Bits 12
Sampling Rate (Per Second) 10k
Number of Inputs 8
Input Type Pseudo-Differential, Single Ended
Data Interface I2C
Configuration MUX-ADC
Ratio – S/H:ADC
Number of A/D Converters 1
Architecture Sigma-Delta
Reference Type External, Internal
Voltage – Supply, Analog 3 V ~ 5.5 V
Voltage – Supply, Digital 3 V ~ 5.5 V
Features Selectable Address, Temperature Sensor
Operating Temperature -40°C ~ 125°C
Package / Case 16-TSSOP (0.173″, 4.40mm Width)
Supplier Device Package 16-TSSOP

ADC128D818CIMTX/NOPB Introduction

The ADC128D818 I2C system monitor gives you more control and better speed than any other system monitor. With its customizable single-ended and pseudo-differential inputs, temperature sensing, WATCHDOG window comparators, and interrupt output pin, it’s easy to keep an eye on many channels at once and sound an alarm if any of them go wrong. Also, because it has a high-performance internal reference and works with both Standard Mode and Fast Mode I2C interfaces, it is good for demanding work settings. This reference guidebook will tell you everything you need to know about the ADC128D818 so you can use it to its fullest.

Description for the ADC128D818

The ADC128D818 I2C system monitor was made so tcomparator, ahat you could have as much freedom as possible. Depending on the settings you choose, the system monitor can accept either single-ended or pseudo-differential inputs. Each channel has a WATCHDOG window comparators  built-in temperature gauge, and an interrupt output pin (INT) that make it easy to keep an eye on it and alert you if it goes out of range. We also have a high-performance internal reference that gives a full-featured answer for the most demanding tasks.

The 12-bit delta-sigma ADC in the ADC128D818 can handle both the 100 kbps Standard Mode and the 400 kbps Fast Mode I2C. The ADC128D818 has a sequencer for controlling channel conversions and different registers for storing the results of the channel conversions so that the microprocessor can access them. By turning off programs that aren’t being used, you can save power.

The ADC can use either an internal reference of 2.56 V or an external reference with a different voltage. An analog filter is used on the digital control lines of I2C to get rid of noise better. The device has a time-out restart on SDA and SCL to keep the I2C bus from getting stuck.

The ADC128D818 is a 16-pin TSSOP device that can work at temperatures from -40°C to 125°C and voltages from 3V to 5.5V.

Features for the ADC128D818

  • 12-bit resolution delta-sigma ADC.
  • Sensing the local temperature.
  • Single-ended and/or pseudo-diff. Inputs that can be set up.
  • Watchdog Window Comparators with Status and Mask Registers for All Measured Values
  • Registers that store measured values on their own INT output notify the error of the microprocessor event.
  • Compatibility of the I2C Serial Bus Interface
  • The time-out reset function keeps the I2C bus from getting stuck.
  • Each channel can be turned off to reduce power use.
  • Deep shutdown mode to use the least amount of power.
  • 16-Lead Package TSSOP

Detailed Description

The ADC128D818 is an analog-to-digital converter (ADC) with 8 channels, a temperature sensor, a voltage reference (VREF) that can be set to be either external or internal, and watchdog registers. There is also a place to link to the I2C serial bus. The ADC128D818 can keep track of power and temperature in a number of different ways. The ADC128D818 constantly converts the voltage input to 12-bit precision, giving it a range of 0 V to 2.56 V. Between 1.25 V and V+, the VREF can be changed from the outside.

The system’s analog ports can be used to connect all kinds of power sources. Each of the eight sources can be set up as either a single-ended or a pseudo-differential channel. Temperatures can be stored with a precision of 0.5 degrees Celsius per least significant bit in a 9-bit two’s complement word.

On the I2C bus, the ADC128D818 can work in both 100 kbps standard mode and 400 kbps fast mode. The ADC128D818 has an analog filter built into its I2C digital control lines. This makes it more resistant to noise. In case the I2C bus gets stuck, the gadget also has a time-out reset mechanism on SDA and SCL.

At startup, the Conversion Rate Register (address 07h) controls how fast the ADC128D818 goes through each measurement. The limit registers are at locations 2Ah through 39H. Here, the measured numbers are compared to thresholds that have already been set. When the reading goes over the set threshold, the ADC128D818 will send an interrupt by writing a 1 to the matching bit in the Interrupt Status Registers (location 01h). You can also use the interrupt output pin (INT), which can be programmed.

ADC128D818CIMTX/NOPB Feature Description

● Supply Voltage (V+)

The V+ supply value for the ADC128D818 can be anywhere from 3 V to 5.5 V. Make sure to connect a 1-F (electrolytic or tantalum) capacitor and a 0.1-F (ceramic) capacitor in parallel to this pin to avoid it.

● Voltage References (VREF)

The reference voltage (VREF) tells what the range of the analog input is. On the ADC128D818, there are two ways to set VREF. You can start with the internal VREF, which is set to 2.56 V. The external VREF source can be connected to Pin 1 of the ADC128D818. The external VREF will work between 1.25 V and V+ with this setup. Automatically, the built-in VREF is used.

Due to the low output impedance that is needed, the VREF source must be replaced with a capacitor of at least 0.1 F. The 0.1 F capacitor should be used with a 1 F capacitor in parallel. The ADC128D818’s VREF does not screen out noise or changes in voltage, just like all other ADC converters. If VREF is plugged into the wall, remember this: If the noise and/or ripple from the supply can’t be filtered out by the external reference circuits, it will show up in the data. You should use a secondary source, as recommended. Reference materials from the LM4040, LM4050, LM4120, and LM4140 families of shunts are highly recommended.

● Typical Application

Design Requirements In this standard hardware monitor application, the ADC128D818 is watching several different sources. First, a temperature gauge on the outside (LM94022) is being watched. Often, an external temperature sensor is used to measure the temperature of the system’s environment.

● Power Management

You require change rates to comprehend the average supply current (I+). Continuous, low-power, and one-shot conversion rates are available for the ADC128D818. The gadget transforms all turned-on channels into Low Power Conversion Mode and then shuts down. About 728 ms.


The ADC128D818 is a reliable and flexible system monitor that can be used for many different kinds of tracking and alarms. With its 12-bit delta-sigma ADC, configurable input options, and separate registers for saving measured values, it allows for accurate and precise monitoring. It is even more useful because it has a local temperature monitor, watchdog window comparators, and an interrupt output pin.

Whether it’s tracking voltage or sensing temperature, the ADC128D818 does a great job. It works with I2C interfaces, has selectable addresses, and has a time-out reset feature, which makes it easy to add to different systems. Also, the ADC128D818 works with a wide range of voltages, which makes it useful in many different situations. The ADC128D818 is the best choice for designers and developers who want to keep an eye on a system in a quick and reliable way.

Are you ready to see how powerful system tracking can be? Include the ADC128D818 in your projects to move forward toward your goals. At ICRFQ, we are committed to giving our customers high-quality help, quick answers, and great service. Our hard-working team is here to help you along the way. Contact us today to find out how the ADC128D818 can help you reach your goals.

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